Organic chemistry Definition and 251 Threads

Homework Statement I have a benzene ring with one methyl group attached and 1-butyne as the two reagents. The final product is a combinination of both into one molecule with the alkyne group in the butyne becoming an oxacyclopropane and the first carbon in the alkyne becoming attached to the...

Organic Chemistry! Ok so I've been looking absolutely everywhere and cannot find an example to go by ANYWHERE... how in the world does a mechanism work for the synthesis using the catalyst potassium tert-butoxide?? The reactant is 2-bromo-3-methyl-butyl-4-benzene. Any hints at all would be...

I'm only a high school junior, but I am debating on whether to take AP Chemistry in senior year or wait till the first/second year of college (it's required either way). However, I have a pretty odd situation since I took pre-AP Chemistry over the summer (not my own school's) and everyone...

What is the difference between biochemistry and organic chemistry?

Hello, Is there any mistake ? http://img216.imageshack.us/img216/7462/90558873jn1.png

this isn't exactly an specific question but a general one. I know that weak bases make good nucleophiles but how do I determine what bases are the weakest, what is weak enough to be considered a "good nucleophile" I'm a little confused please help thanks a lot!

Homework Statement Find the major organic product B of http://www.webassign.net/userimages/kasandbe/CH221_ssii_02/CH221_exam2_ssii_02_7a.gif (with ethanol at 0 degrees Celsius) Homework Equations The Attempt at a Solution I thought that since it is a SN1 reaction the -OTs would...

Organic Chemistry question! How do you write a balanced chemical equation for the reaction that can occur between p-toluidine and hydrochloric acid?? and is benzoic acid a polar or non-polar molecule overall??

I was wondering does bromide react with propanol or propanal at all? Also, what answers do people get for this question, i say it either propanol or propanal as i don't know if either reacts with bromide and both would be a suitable answer. The question is: Compound A has a molar mass...

Homework Statement Two protons have different pKas: 3.50 and 4.25. The molecule is 2-bromo-3-nitrophthalic acid (if I'm naming it correctly). Assign the correct pKa to each proton. http://uploader.ws/upload/200805/pkablank.jpgHomework Equations A lower pKa means a stronger acid, which means...

Hello I am taking organic chemistry I and II this summer and our required text is by Solomons, is there a nice book that you guys recommend to replace/supplement this text? I am a math student and it appears that the orgo books follow the same trend as calculus books (Stewart, Larson, etc..)...

Homework Statement please check PDF Homework Equations none The Attempt at a Solution I have no idea how to attempt this problem set. The instructor had this insane idea that if he gave us questions that we've never seen/dealt with before that he'd be doing a better job...

I'm a bit confused about what alkyl groups are in organic chemistry. I thought functional groups by definition where groups of atoms which contained at least 1 element other than carbon or hydrogen which were connected to the carbon skeleton of the molecule. What are alkyl groups then? I read...

I just learned octane numbers in organic chemistry a few days ago, and I'm extremely confused about it. From what I understand, the octane number indicates resistance of a motor fuel to knock, and "knock" is the tendency for the fuel to detonate before hit by spark. Is there an easier way to...

[SOLVED] Organic Chemistry Which about benzene is true? 1. It has alternating single bonds and double bonds. 2. All C-C bonds are of the same length. 3. It is more stable than a hypothetical cyclohexatriene. 4 1 and 3 5. 2 and 3 I said 5, but it also has alternating...

Does anyone know any good websites to find some challenging organic chemistry questions?

[SOLVED] Lewis Reaction Questions (Organic Chemistry) Homework Statement 1) H2C=O + CH3NH2 <-----> ? 2) CH3(C=O)-CH2(C=O)-OCH3 + CH3O(-) <-------> ? 3) CH3CH2CH2-COOH + Na2CO3 <------> ?The Attempt at a Solution 1) My Answer: CH3NH2 is the lewis base and H2C=O is the lewis acid. Nitrogen...

The question/direction is to: "Draw the structure of the following compound!" 2-methyl-4-(1-methylethyl)octane I tired several different ways of constructing this compound but the online homework program ACE Organic says that: I don't know what to do or what I am missing. If anyone can...

Hi everyone, I bought the book online, so now I'm waiting for its delivering. But I have to submit the homework assignments for credit. Could anybody who have the Organic Chemistry of Bruice 5th edition, please post the question of these problems for me? Thank you soooooooooooooo much ...

I came across this question and I don't understand how to approach it. Write balanced equations to show the formation of each of the following compounds. Name the reactants in each case and show clearly the removal of the water molecule. a) butyl propanoate b)propyl methanoate I don't...

1)Give a chemical test that can be used to distinguis between separate samples of propanone and propanal. Give a suitable reagent for the test and describe what you would obsrve with propanone and with propanal. 2) Outline the reaction of propanone with the following reagents. Give the...

Homework Statement What is the product when 1,1,4,4-tetra D cyclohexane is treated with SO2Cl2 The Attempt at a Solution I'm confused whether Cl will replace D or H (it must replace anyone of them)

Homework Statement Hi all, In a sodium borohydride reaction, one of the hydride in BH4- will attack the ketone, and the O- in the ketone will bond with the BH3. This would continue until all the hydride ions are used up. My question is..what would be the driving force that makes the...

Homework Statement This is a problem taken from an old exam: C. Which set of pKa’s is correct? 1. CH3COCH3 -7.0 2. CH3COCH3 -19.0 CH3COOH 4.8 CH3COOH -4.8 HCl 19.0 HCl 7.0 3. CH3COCH3 4.8...

Hi, I'm encountering organic chemistry for the first time in high school and am finding it quite exciting. I'm using Morrison and Boyd as the text. I was wondering if you could test me with a few synthetic problems or product prediction that will challenge my understanding and application? I...

Can someone please tell me what the two bond between the two hyrdrogen and the carbons means?(the long black triangle, and the '''''')

hello, ok i will get straight to the point i don't get the following questions: Indicate the following type of reation that is taking place, and also give an example. a) Alkyl halide to alcohol b) Alkyl halide to alkene c) alkyl halide to alkyne d) alkene to an alcohol i tried a), i got...

Say we have a mixture of 10 mL of methane and propane. For a complete combustion, we need 41 mL of O2. Calculate the composition of the mixture in terms of volume, if atmospheric temperature and pressure are constants. The equations are: CH4 + O2 --> CO2 + H2O C3H8 + O2 --> CO2 + H2O I...

Write balanced equations to show the formation of each of the following compounds. Name the reactants in each case, and show clearly the removal of the water molecule. a) butyl propanoate b) propyl methanoate Im not exactly sure how to answer this question... below are pics of the...

Discuss the difference in the reactivity between the following pairs of compounds : 1. Benzene and phenol with bromine 2. 1-hexanol and 2-hexanol with chromium trioxide in acid 3. ethylamine and acetamide in dil HCl 4. Sodium methoxide and sodium tert-butoxide with 1- bromopropane Thanks

Are the answers I got correct? http://img162.imageshack.us/img162/4007/untitled6kq1.png What I got: 1. a. http://img162.imageshack.us/img162/2193/1a3bp.png 1. b. http://img81.imageshack.us/img81/4995/1b9ov.png http://img84.imageshack.us/img84/4194/515oo.png...

Hello guys and girls. I am writing to you all today in hopes that someone out there will be able to help me with my problem. I am asked to synthesize the molecule camphor starting merely from acetly-CoA and Acetic Acid. This must be done in a biological manner. Ie. The Co-A group will be...

The most stable conformation of trans-1-tert-butyl-4-methylcyclohexane is the one in which: A- the tert-butyl group is axial and the methyl group is equatorial B- the methyl group is axial and the tert-butyl group is equatorial C- both groups are axial D- both groups are equatorial E- the...

Could anyone please tell me if the name propiophenone is a IUPAC systematic name? And if so why it is this way.

I was wondering if it's correct to name isopropyl in IUPAC as 1-methylethyl? :rolleyes:

Hi Me and my friends have been cracking our heads over this question: Why does PhenylEthene solidify when exposed to air? Me and my friends have come up with an explanation: The oxygen in the air oxidises the phenylethene to a diol. The hydrogen bonds existing between the molecules...

OK my question asks: Provide and briefly explain 3 examples of how organic chemistry can be used to improve existing products and thus provide solutions to newly identified health of environmental problems. I am having trouble thinking of these. I got one so far which is unleaded instead of...

there are a million answers to this, but what comes to mind as some of the biggest ones? I have to research a few of these, preferably something has has improved existing products to make them better for our health/the environment. One big one is unleaded instead of leaded gasoline. Any...

Hi What are the necessary and sufficient conditions for a compound to give a positive Haloform Test (Iodoform test for instance)? Is it necessary to have a CH_{3}CO- group or is it necessary to have a XCH_{2}- group where X is some group? Is the occurence of a CH_{3}CO- group a sufficient...

Hi, I want to know what happens when a mixture containing aldehyde(s) and ketone(s) is introduced to a mixture of formamide HCONH_2 and formic acid HCOOH. Do both aldehyde and ketone react? Or does only one react? Eagerly awaiting a response... Thanks and Cheers Vivek

Can anyone please name this compound: http://www.wwwebworld.co.uk/chem.JPG Thankyou

I know that a double bond has the two atoms closer to each other than a single bond. I have to build an organic acid model for chemistry and would like to know: - Is there a ratio between the lengths of C-C bonds to C=C bonds? - Are C-H bonds closer together than C-C bonds? - Are C=O bonds...

does any1 know where i can get a spider diagram for as level chemisry, like the reactions between different organic groups and suchlike thank you :biggrin: :smile:

organic chemistry help! how do i name a pentane with a double bond on one end and triple bond on the other end? pent-1-ene-4-yne? if an octane has a double bond on one carbon and a phenyl group on another carbon . which should i start with first, the phenyl or the double bond?

I have been searching like crazy for different and easier material on organic chemistry for higher level students on the net, but it's hard to find. I assume that there are knowledgeable participants on this part of the PF and I would like to ask if someone knows of a good link? :smile...

Hi all I am doing this lab in my organic course right now, and I have a few questions. The phenol I am working on is pKa of p-chlorophenol. I obtained a UV spectrum of phenol in acid, phenol in base, phenol in buffer with higher pH and phenol in buffer with lower pH. 1)In the UV spectrum...

Isolating caffeine from tea leafs is an experiment in our lab. The manual asks us to determine the percent yield of caffeine by comparing the pure product of caffeine versus the original mass of the tea leafs. My question is, how valid is this method for finding percent yield? I do not...

Hi I have a few questions in organic chemistry. I would be very grateful if someone can answer them: 1. (cf Morrison & Boyd 6th ed page 523). "Strongly activating groups generally win out over deactivating or weakly activating groups." When the bromination of 3-hydroxybenzaldehyde...

I find it extremely tough to remember the correct mechanisms and apply them, there seems to be so many different structures etc. Can anyone offer any advice regarding learning organic chemistry? Are there any decent websites/material which lay out organic chemistry in a more accessible manner...

Hi everyone. I need help with some organic chemistry. When I see a reaction, how do I tell whether it is SN1, SN2, E1, or E2? Also, what is it about a nucleophile that makes it good or bad? Thanks in advance.