Chemistry websites

[ryokan]

I think that these links can be interesting:

PeriodicTable:
http://www.webelements.com/
http://www.chemsoc.org/viselements/index.htm

Organic Chemistry (From Frostburg State University). It s an Introduction, with some interesting tutorials.
http://www.chemhelper.com/

Surface Chemistry: An introduction to Surface Chemistry
http://www.chem.qmw.ac.uk/surfaces/scc/sccinfo.htm

Environmental Chemistry, with information on hazardous materials
http://environmentalchemistry.com/
http://www.epa.gov/iris/

General Introductory Links:
http://www.psigate.ac.uk/newsite/reference/plambeck/chem2/ua102.html

"Virtual Chemistry":
http://neon.chem.ox.ac.uk/vrchemistry/

Virtual Classroom:
http://ull.chemistry.uakron.edu/classroom.html

History of Chemistry:

Selected Classic Papers
http://webserver.lemoyne.edu/faculty/giunta/papers.html

Linus Pauling Papers:
http://profiles.nlm.nih.gov/MM/

A History of Mass Spectrometry
http://masspec.scripps.edu/information/history/

Alchemy:
http://www.levity.com/alchemy/

Molecular structures and resources

http://www.molecularuniverse.com/

UCSF Chimera: A free interactive molecular graphics programm
http://www.cgl.ucsf.edu/chimera/

Reciprocal Net.A database with information about molecular structures
http://www.reciprocalnet.org/index.html

The Wired Chemist. A Collection of Chemistry Resources
http://wulfenite.fandm.edu/

[Gokul43201]

Useful list ryokan, thanks !

This one is quite comprehensive, and lists all online tutorial sites : http://www.chemistrycoach.com/tutorial.htm

[ryokan]

Useful list ryokan, thanks !

This one is quite comprehensive, and lists all online tutorial sites : http://www.chemistrycoach.com/tutorial.htm

It is very good.
I did not know it. Effectively, it is very comprehensive.
Thank you.

[ryokan]

I think that these webs could be very interesting in Biochemistry

A comprehensive page on Biochemistry
http://web.indstate.edu/thcme/mwking/home.html

Aminoacids
http://wbiomed.curtin.edu.au/teach/biochem/tutorials/AAs/AA.html

An special web supplement of Science on Glycobiology
http://www.sciencemag.org/feature/data/carbohydrates.shl

and Metabolic Pathways
http://www.gwu.edu/~mpb/index.html

[fawaz]

hey ryokan.. thanks a lot for ur links on biochemistry.. they were really useful for my projects.

[ryokan]

I think that these links can be interesting:

Generalist webs:
A web with a comprehensive content on history of chemistry:
http://www.chemistrycoach.com/history_of_chemistry.htm#Biographies%20of%20Chemis ts
Other interesting general link (in French)
http://histoirechimie.free.fr/
One generalist timeline (also in French)
http://www.umh.ac.be/lignetempschimie/

Links on historical topics about Elements and atoms:http://web.lemoyne.edu/~giunta/EA/CONTENTS.HTML
http://www.phys.virginia.edu/classes/252/atoms.html
One time line: http://www.watertown.k12.wi.us/HS/Staff/Buescher/atomtime.asp


And the Nobel e-Museum's Page
http://www.nobel.se/chemistry/index.html

[ryokan]

This is another very interesting link on History of Chemistry
http://www.chemheritage.org/EducationalServices/chemach/home.html

[ryokan]

The Nobel Prize of 1999 was related to femtochemistry.


I think that these are interesting links about this topic:

Introduction to femtochemistry
http://pubs.acs.org/cgi-bin/jtextd?jpcafh/104/24/html/jp001460h.html

From femto to atto
http://www.innovation.ca/innovation2/bio_corkum.html

Professor Ahmed Zevail
http://www.its.caltech.edu/~femto/
http://nobelprize.org/chemistry/laureates/1999/zewail-autobio.html

[Astronuc]

http://www.chemweb.com/

On-line newsletter and resource for chemists and chemical engineers.

Subject areas:

Analytical Chemistry
Biochemistry
Catalysis
Chemical Engineering
Electrochemistry
Fuel & Petrochemistry
Inorganic Chemistry
Materials Chemistry
Organic Chemistry
Pharmaceutical Science
Physical Chemistry
Polymer

http://www.chemweb.com/about

They also publish an e-newsletter, The Alchemist (http://www.chemweb.com/alchemist)

[Gokul43201]

I think some form of this thread would be useful as a sticky.

[ryokan]

I think some form of this thread would be useful as a sticky.
Thank you, Gokul43201.

[Astronuc]

Let's not forget the American Chemical Society

http://www.chemistry.org/portal/a/c/s/1/home.html

I would be interested in other societies in other countries.


For those who are involved in chemistry and particularly in synthesis, check out the following site:

http://www.innocentive.com/

InnoCentive enables independent and university scientists to receive professional recognition and financial awards for solving R&D challenges.

http://www.innocentive.com/about/index.html

Basically this organization lists problems from the chemical (organic and inorganic) and biochemical (e.g. pharmaceutical) industries. Problems are posed and one can select to solve the problem for the stated price. One must register to participate.

No endorsement of Innocentive is expressed or implied.

[chem_tr]

Have you known this website? www.orgsyn.org has lots of organic synthesis knowledge, I have been using it for a couple of weeks. It is completely free! It deserves your hits, I think. A second link is http://themerckindex.cambridgesoft.com/TheMerckIndex/NameReactions/, this is the online and free version of The Merck Index, Thirteenth edition.

Hope you find them useful.

[Bladibla]

I got another 'useful' website..

For people who have confusing pictures of sub-atomic orbitals in their chemistry book:

http://www.shef.ac.uk/chemistry/orbitron/index.html

[oookhc]

Probably the following one could be helpful:

http://www.ScienceOxygen.com/chem.html

It is with a collection of links on Chemistry, but
it does not provide any answer directly.

[Astronuc]

General Chemistry Online.

http://antoine.frostburg.edu/chem/senese/101/index.shtml

[Astronuc]

Lecture Notes for Chemistry 112 - First Year Chem

by

Michael Mombourquette
Associate Professor
Dept. of Chemistry
Queen's University
Kingston, ON K6H 3N6

http://www.chem.queensu.ca/people/faculty/mombourquette/FirstYrChem/

[GCT]

Avogadro's number

http://gemini.tntech.edu/~shn6921/chem111/avogadro.html

[GCT]

gravimetric analysis (pdf)

http://www.rminfo.nite.go.jp/common/pdfdata/4-002e.pdf

[GCT]

Brief summary of Alkyne chemistry

http://www.cem.msu.edu/~reusch/VirtualText/addyne1.htm

[GCT]

E2 vs SN2 tutorial (pdf)

http://www.chem.umd.edu/courses/jarvis/chem233/chapter11.pdf

[GCT]

Addition reactions: polar addition (e-text/pdf)

http://www.chemistry.esmartweb.com/org.rxn.mech13.pdf

[GCT]

General information on FD&C dyes

http://www02.so-net.ne.jp/~tombo/ci/jcie.htm

main site FDA colour additives

http://www.cfsan.fda.gov/~dms/col-toc.html

[GCT]

Very nice thermochemistry site, for simple explanations of complex subjects in tc.

http://dbhs.wvusd.k12.ca.us/webdocs/Thermochem/Thermochem.html

-the concept of PV work

http://dbhs.wvusd.k12.ca.us/webdocs/Thermochem/PV-Work.html

-enthalpy

http://dbhs.wvusd.k12.ca.us/webdocs/Thermochem/Enthalpy.html

CHEMTEAM, very nice tutorials for high school chemistry

http://dbhs.wvusd.k12.ca.us/webdocs/ChemTeamIndex.html

Brief mathematical analysis of entropy (thermodynamical persective)

http://chsfpc5.chem.ncsu.edu/CH431/lecture_2001/lec_11_third_law.htm

[GCT]

Classical papers in chemistry, online

http://dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Classic-Papers-Menu.html

[GCT]

Addition of bromine to alkene: free energy diagrams

http://www.cem.msu.edu/~reusch/VirtualText/addene1.htm

[DrMark]

Fundamental physical constants:

http://physics.nist.gov/cuu/Constants/index.html

[DrMark]

Software (fortran, c, c++):

http://www.netlib.org/

[DrMark]

Quantum chemistry program exchange:

http://qcpe.chem.indiana.edu/

(note the codes are not free)

[DrMark]

Chemical Kinetics Simulator (and it's free):

https://www.almaden.ibm.com/st/computational_science/ck/msim/

[DrMark]

Need some rate constants ?

solution:

http://kinetics.nist.gov/solution/index.php

gas phase:

http://kinetics.nist.gov/index.php

[DrMark]

Why not have your screensaver do some chemistry ?

http://www.grid.org/download/gold/download.htm

[DrMark]

OK since I was babbling about some electrochemistry tonight here's a useful link:

http://www.consultrsr.com/resources/ref/index.htm

A reference electrode converter there and more.

[GCT]

surface tension at different temperatures

http://hyperphysics.phy-astr.gsu.ed.../surten.html#c3

[kclo4x]

http://www.sciencemadness.org/talk/index.php is a good chemistry site one of the best

[mor3ebuae]

Useful list ryokan, thanks

[Astronuc]

Chemistry ProfessorTM - http://chemistryprofessor.com/

http://chemistryprofessor.com/organic_chemistry.htm

Limited discussion, but interesting products. (No endorsment expressed or implied).

[Astronuc]

http://electrochem.cwru.edu/ed/encycl/index-s.html

This site contains popular-science style articles describing many aspects of electrochemistry. New articles are added at irregular intervals, and all articles are periodically updated as recent developments occur in the field.
Hosted by the Ernest B. Yeager Center for Electrochemical Sciences (YCES) and the Chemical Engineering Department, Case Western Reserve University, Cleveland, Ohio.

Edited by Zoltan Nagy (nagy@anl.gov) The Center for Electrochemical Science and Engineering and Department of Chemical and Environmental Engineering, Illinois Institute of Technology, Chicago, Illinois.

[Astronuc]

PCCP - Journal of Physical Chemistry, Chemical Physics (http://www.rsc.org/Publishing/Journals/CP/)

An international journal for the fastest publication of high-quality original work in physical chemistry, chemical physics and biophysical chemistry.

Interesting stuff here.

And

Royal Society of Chemistry (http://www.rsc.org/), RSC, the largest organisation in Europe for advancing the chemical sciences.

[Astronuc]

EQUILIBRIUM CONSTANTS: Kc

http://www.chemguide.co.uk/physical/equilibria/kc.html

EQUILIBRIUM CONSTANTS: Kp

http://www.chemguide.co.uk/physical/equilibria/kp.html

[Astronuc]

Interesting discussion of water properties (Explanation of the Anomalies of Water) -

http://www.lsbu.ac.uk/water/explan.html

[GCT]

Scattering properties, spectrometry

http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/scattercon.html#c1

[Astronuc]

UNC-Chapel Hill Chemistry Fundamentals Program

Department of Chemistry - http://www.shodor.org/UNChem/index.html

Nomenclature - http://www.shodor.org/UNChem/basic/nomen/

Atomic Structure - http://www.shodor.org/UNChem/basic/atom/index.html

Stoichiometry - http://www.shodor.org/UNChem/basic/stoic/index.html

Acid-Base Chemistry - http://www.shodor.org/UNChem/basic/ab/index.html

Advanced concepts - http://www.shodor.org/UNChem/advanced/index.html
- Gas Laws
- Thermodynamics
- Kinetics
- Equilibria
- Redox Chemistry
- Nuclear Chemistry

[Astronuc]

Chemical Thermodynamics in Department of Chemistry · The University of Arizona.

http://www.chem.arizona.edu/~salzmanr/480a/480ants/chemther.html

(if the link goes bad, please report to SuperMentor)

[GCT]

acid/base characteristics of glycine

http://www.bio.mtu.edu/campbell/aminot1.htm

[GCT]

MSDS hyperglossary: concentration units-basically every concentration out there

http://www.ilpi.com/msds/ref/concentration.html

[Astronuc]

This might be useful for Chemical Engineers-

Elements of Chemical Reaction Engineering

http://www.engin.umich.edu/~cre/toc/frames.htm

http://www.engin.umich.edu/~cre/344/lectures.htm

from University of Michigan

[Astronuc]

A molecular dynamics primer

vby Furio Ercolessi, University of Udine, Italy

http://www.fisica.uniud.it/~ercolessi/md/md/node1.html

[Astronuc]

Nature Chemical Biology

http://www.nature.com/nchembio/index.html

Monthly Nature Research Journals (Nature Biotechnology, Nature Cell Biology, Nature Genetics, Nature Immunology, Nature Materials, Nature Medicine, Nature Neuroscience, Nature Structural & Molecular Biology and Nature Chemical Biology) offer Advance Online Publication (AOP) on their websites.

See also - http://www.nature.com/index.html

[Borek]

Oh, well - some advertising of my own job:

www.chembuddy.com/?left=lectures (http://www.chembuddy.com/?left=lectures)

Best,
Borek
--
Chemical calculator (http://www.chembuddy.com/?left=chemical_calculators)s at www.chembuddy.com (http://www.chembuddy.com)
equation balancer and stoichiometry calculator (http://www.chembuddy.com/?left=EBAS&right=equation-balancing-stoichiometry)
pH calculator (http://www.chembuddy.com/?left=BATE&right=basic_acid_titration_equilibria)
concentration conversion (http://www.chembuddy.com/?left=CASC&right=concentration_conversion)

[nazgjunk]

This list truly is great. I wanted to ask for some "teach me chemistry" links when I saw this thread. The thing is, I would like to learn some more (and faster) than I am doing now in class. To give you an idea, I am 17 years old and currently in fifth grade VWO (that's in holland. I still need to find out how to translate that to a more internationally understood system).

[Plastic Photon]

Here is the chemistry index for hyperphysics:
http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/chemcon.html#c1
EDIT: Ok, I fixed the link

[Astronuc]

http://www.chemguide.co.uk/index.html

Atomic Structure and Bonding

Inorganic Chemistry

Physical Chemistry

Instrumental analysis

Basic Organic Chemistry

Properties of organic compounds

Organic Reaction Mechanisms

and more

[Borek]

www.ph-meter.info - pH measurements, pH meters, pH electrodes. (www.ph-meter.info)

Best,
Borek
--
Chemical calculator (http://www.chembuddy.com/?left=chemical_calculators)s at www.chembuddy.com (http://www.chembuddy.com)
equation balancer and stoichiometry calculator (http://www.chembuddy.com/?left=EBAS&right=equation-balancing-stoichiometry)
pH calculator (http://www.chembuddy.com/?left=BATE&right=basic_acid_titration_equilibria)
concentration conversion (http://www.chembuddy.com/?left=CASC&right=concentration_conversion)

[engware]

There are two more good web sites:
http://www.aiche.org
http://www.cheresources.com
Thanks,
Gordan

[Plastic Photon]

http://ocw.mit.edu/OcwWeb/Global/all-courses.htm

Left the department list (all courses) in case you want to view othes.

[Astronuc]

Complementing a site listed by ryokan at the top of page #1 -

http://www.chem.ox.ac.uk/it/ - Oxford, Department of Chemistry, Chemistry Online. :cool:

Their links to online resources related to chemistry - http://www.chem.ox.ac.uk/cheminfo/

[Astronuc]

http://www.nyu.edu/classes/tuckerman/honors.chem/lectures/lecture_21/lecture_21.html

General Chemistry
http://www.nyu.edu/classes/tuckerman/honors.chem/lectures/notes.html

[Astronuc]

Supplementing a website posted earlier by GCT.

http://dbhs.wvusd.k12.ca.us/webdocs/AcidBase/AcidBase.html

and this is pretty cool

Development [of the Understanding] of Acids and Bases
http://library.thinkquest.org/C006669/data/Chem/acidsbases/development.html

[Astronuc]

http://library.thinkquest.org/C006669/data/Chem/

[Astronuc]

And yet another cool Chem website.

AP Chemistry Labs :cool:

http://www.jesuitnola.org/upload/clark/labs.htm

[BTruesdell07]

www.periodictabletable.com

[Astronuc]

Free newsletters site -

http://www.chemindustry.com/newsletter/center.html

News from specific area of chemistry and chemical R&D.

Other publications.

http://chemindustry.tradepub.com/

[sophster]

So many links and no mention of molecules with silly or unusual names!

http://www.chm.bris.ac.uk/sillymolecules/sillymols.htm

This has kept me amused during many long days in the lab :rofl:

[Astronuc]

Virtual Textbook on Organic Chemistry

http://www.cem.msu.edu/~reusch/VirtTxtJml/intro1.htm

[engware]

Check out http://members.aol.com/engware/free where you can find lots of free online and downloadable engineering e-solutions (online calculators, demos, slide shows, engineering modeling, coursework material, plots etc.)

Thanks,

Gordan

[imike]

Thank you for the information :)
__________________
What A Masterpiece (http://www.mensarticles.com/education/884-whatamasterpiece.html) Admissions Do's And Don't (http://www.mensarticles.com/education/692-admissionstocollege.html) Be A Memory Whiz (http://www.mensarticles.com/education/1093.html)

[Borek]

Addition to ChemBuddy - lectures on balancing chemical equations and stoichiometric calculations (http://www.chembuddy.com/?left=balancing-stoichiometry&right=toc).

Best,
Borek
--
Chemical calculator (http://www.chembuddy.com/?left=chemical_calculators)s at www.chembuddy.com (http://www.chembuddy.com)
equation balancer and stoichiometry calculator (http://www.chembuddy.com/?left=EBAS&right=equation-balancing-stoichiometry)
www.pH-meter.info/pH (http://www.ph-meter.info/pH)

[engware]

Hi there;

Check out:

ChemicalForums at http://www.chemicalforums.com
CheResources at http://www.cheresources.com
Chemical Engineering magazine at http://www.che.com

Thanks,

Gordan

[Jmuda]

Hi there, I got this chemistry web site with periodic table and free images:

http://www.elementsdatabase.com

[Astronuc]

Virtual Library: Science: Chemistry: Electrochemistry

http://www.liv.ac.uk/Chemistry/Links/electrochem.html


Electrochemistry Dictionary

http://electrochem.cwru.edu/ed/dict.htm

[scott1]

http://www.chemsoc.org/viselements/pages/pertable_fla.htm

[Ali Muhammad]

thnx all.

May I contribute soon.

[FlipFlip]

Free Chemistry Web Applications:

http://alchemist.sytes.net

:surprised

[Astronuc]

This might be useful -

Commercial Sources and Uses of Elements
http://www.innvista.com/science/chemistry/elements/commerc.htm

[siddharth]

Here's a useful database on Chemical Kinetics
http://kinetics.nist.gov/kinetics/index.jsp

[Jimmy Snyder]

I've followed the links through to some of the periodic tables on the web. I haven't found one that suits my needs, but then I haven't followed all of them. I wonder if someone knows of a table such as I describe here.

First, I will describe most of the tables I have seen so far. There are a bunch of squares layed out in a characteristic pattern. Each square has a one or two letter symbol for an element, the atomic number of that element, and the atomic weight. When you click on the square, you get more information about that element including the one thing that interests me the most, the chemical properties of the element.

What I want would look exactly the same when you went into the page. However, there would be a list of properties you could click on. If you clicked on "Boiling Point" for instance, then instead of atomic weights in the table, you would see boiling points. Atomic diameters, electron affinity, first ionization energy, etc. would all work the same. That way you could see the periodicity of the chemical properties of the elements which, I assume, played a central role in the creation of the table. More to the point, it would help me to solve the problems in the book I am reading.

In the book I am reading, there is a periodic table every so many pages that looks like a snap shot of the kind of table I am looking for. Is there one like that on the web now? There's nothing really to creating one. If one doesn't already exist, I might make it myself.

[Jimmy Snyder]

Here is a link to a periodic table such as I described in the previous post. Unfortunately, it only has a few properties. Even so, it works exactly as I had envisoned.

http://www.chemicalelements.com/index.html

[Jimmy Snyder]

I have created my own periodic table and put it up at:

http://www.erratapage.com/pertab.html

It needs a lot of work to make it esthetically pleasing. But functionally, it is exactly what I wanted. It is extensible, so it is very easy to add more properties. The idea of the table is that you can select which property will be displayed and you can see the periodicity of that property such as it may be.

[JGM_14]

Some simple chem experiments
http://www.crscientific.com/articles.html

[nhfs49]

very useful sites. thank you

[Borek]

Pretty large collection of electrochemistry related links:

http://electrochem.cwru.edu/estir/

[a.a]

Is there a good realiable site that could helo review some of the priciples of quantum machanics, the quantum numbers and orbitals?

[tlestra]

Hallo,

I am surprised to find this forum. The links are interesting ... I was looking for some chemistry history and beside wiki, I now have more things to research. I don't have much to contribute... not so much in phsyics, but there is a site good for college organic. The website has some video tutorials. Some people may find it useful.
Keep up the good work.

www.yourformulasheet.com (http://www.yourformulasheet.com)

lestra

[ninjaDUDE]

thanks bro this helps

[waht]

Every element on the periodic table is discussed by a cool professor and his colleagues on youtube.


http://www.youtube.com/watch?v=99wPiMb-k0o


http://www.periodicvideos.com/

[chemerp]

Online chemical products & suppliers network

http://www.chem-supplier.com

[Borek]

I forgot to mention - new site I am working on:

http://www.titrations.info

[Borek]

Pictures added today to the titration site:

acid base titration indicators preparation (http://www.titrations.info/acid-base-titration-indicators-preparation)

[silver77]

Borek,

How long have you been working on this site http://www.titrations.info just browsed through it a little and really liked what I saw. Great content by the way..

[Borek]

Hard to say. It is a side project. First serious content was uploaded in February, but you know how it goes - two hours here, one hour there...

[silver77]

Hard to say. It is a side project. First serious content was uploaded in February, but you know how it goes - two hours here, one hour there...

Yeah tell me about it, but still nice site!!!

[strawberryflu]

(FREE) Uniquely Singapore A-level final year school-leaving exam questions +
answers

2006-2008 Chemistry

http://www.4shared.com/file/114467883/2dbe95db/2006_A-LEVEL_CHEMISTRY.html
http://www.4shared.com/file/114484854/abf16fba/2007_A-LEVEL_CHEMISTRY.html
http://www.4shared.com/file/114503454/c4103603/2008_A-LEVEL_CHEMISTRY.html

2006-2008 Physics

http://www.4shared.com/file/114471474/255393bf/2006_A-LEVEL_PHYSICS.html
http://www.4shared.com/file/114495589/edeab0cc/2007_A-LEVEL_PHYSICS.html
http://www.4shared.com/file/114512654/4248acb8/2008_A-LEVEL_PHYSICS.html

[jerer]

Videos of all the elements on the periodic table
http://www.periodicvideos.com/

Basic chem info
http://antoine.frostburg.edu/chem/senese/101/atoms/slides/index.shtml

Video lectures of many subjects
http://www.learnerstv.com/

[seouldavid]

This is a collection of links to audio/video courses and lectures in chemistry and chemical engineering from colleges/universities around the world.

infocobuild | Chemistry and Chemistry Engineering (http://www.infocobuild.com/education/audio-video-courses/chemistry/chemistry-and-chemical-engineering.html)

This may be helpful for students who are interested in chemistry.

[TwigLaser]

Alchemy caught my eye.

[Chica1975]

Thanks so much for these! They are very useful - what a great resource these forums are! :)

[HeLiXe]

I searched to see if this was posted before and could not find anything similar. These videos can also be accessed through you tube. Good videos for acquainting one's self with the elements.
http://www.periodicvideos.com/

[zitana]

tanks it is so useful site

[HeLiXe]

You're welcome Zitana :)

Here is another one I am liking. A few pages of it have been referenced on PF before. It's an online chemistry learning tool :)
http://www.fordhamprep.org/gcurran/sho/sho/lessons/lessindex.htm

[HeLiXe]

I'd like to recommend KhanAcademy's lectures on orbitals for anyone trying to wrap their brain around it... some sources make it seem so complicated and it's really simple! The videos are on you tube and are called Electron Configurations, Electron Configurations 2, and More on Orbitals and Electron Configurations

[sankalpmittal]

www.chemguide.co.uk

Try this . :biggrin:

[Borek]

History of the Origin of the Chemical Elements and Their Discoverers:

http://www.nndc.bnl.gov/content/elements.html

[nandinitri]

http://www.youtube.com/user/UCLACourses?feature=g-user-u#g/c/4BE4AAFBFECDB2F8

this series of videos gives a very good understanding of basic organic chemistry......and the professor keeps u entertained and interested in the subject.....i just got hooked to it

[anigeo]

Useful list ryokan, thanks !

This one is quite comprehensive, and lists all online tutorial sites : http://www.chemistrycoach.com/tutorial.htm

thanx .
any useful sites on electrochemistry

[jabar11]

One listing all the major types of reactions in organic chemistry:

http://www.chem.ox.ac.uk/vrchemistry/nor/reactions.asp

[elemis]

I think you should add www.chemguide.co.uk to the list