Compounds Definition and 227 Threads

Two questions: 1. What tools and techniques are typically used to determine and plot spatial distributions of compounds--particularly organic ones--in interstellar dust? 2. Is it presently possible to determine distributions of compounds along arcs distant from the galactic center? If so, can...

Any polarised light's plane is shifted while passing from one medium to another for refraction. So, optically active or not, a solution of any compound will cause refraction because of its density. Then what's special in an optically active compound?

I'm looking for examples of some interesting compounds that contain alcohol functional group (please, no joke suggestions about various liquor). Bonus points for creativity/thinking-outside-the-box. Thanks.

I am aware of the processes through which cations are coloured in ligand complex (splitting of incomplete d-shell will absorb specific frequencies of the spectrum). However, I am only aware of this interaction with aqueous mono-atomic cations, which is not always a present condition when colours...

Hi there, I'm studying for IGCSE Chemistry and I'm a little confused with Bonding/Molecules. My textbook says: "Molecules are held together by covalent bonds" I'm a little confused by this as I thought a molecule was formed when two or more atoms (same or different elements) join together...

Homework Statement Could anyone tell me if [NiF₆]2- and [NiF₆]4- are diamagnetic or paramagnetic? And also their hybridization states? please? Homework EquationsThe Attempt at a Solution well i thought F is a weak ligand and hence a high spin complex formed, but i read a few places where it...

Homework Statement Give the IUPAC nomenclature of the following compound (in the attachment) (sorry, i don't know why the picture has become upside down!) The Attempt at a Solution Shouldn't the answer be 1-phenyl-2,3-dibromopentane? The book says it is 2,3-dibromo-1-phenylpentane.

Homework Statement CH2=CHCHCH3 + X --> CH3CHClCH2CH3 CH3CHClCH2CH3 + KOH(aq) --> Y then what is the structural formula of Y ?? (show clearly where the functional group located)The Attempt at a Solution It is obvious that X is HCl, and Y should be an alcohol but where is the hydroxyl group be...

I found this in "March's Advanced organic chemistry" After that step, on using HCl in pentane, you will get 4-methyl-3-Heptanone. So this method was used to convert achiral 2-pentanone to a chiral compound, by first converting it to the compound on left by addition reaction and then using a 2...

Homework Statement While reading my textbook I found that ##Hg(NH_2)Cl.Hg## was given of black colour , whereas ##Hg(NH_2)Cl## of white colour.So is this correct? Homework Equations None The Attempt at a Solution I googled about ##Hg(NH_2)Cl## . It is ##white ## in colour . But I am not sure...

In chemical formulas of various inorganic compounds there are molecules of water .I wanted to know is it important to remember the number of moles of water in chemical formulas of inorganic compounds.

I have an extensive list (glossary)of inorganic compounds and their common names,I have to memorize all of them.I am really having hard time.Systematic names are easy to follow and remember but what to do for common names?The glossary contains 30-40 compounds and their common names for each...

Is sulfuric acid reacts with all organic compounds?

In the subheading "features of covalent compounds" what that means glucose(less solid) and sugar (more solid) Please guide me.

Homework Statement Label the acid hydrogen in each of the following compounds and arrange them in order of increasing acidity and explain the trend. Homework Equations N/A The Attempt at a Solution I'm not quite sure what the question means by "label" the acidic hydrogen but I believe...

I am confused with the electron configuration of central atoms in complex salts eg. ##[Fe(CN)_6]^{2-}## configuration just Fe atom is Now the complex is low spin so the configuration becomes, Now we have 6CN. where will they donate their electrons? Will the donate electrons in the remaining...

Homework Statement The Attempt at a Solution My answer was C but the correct answer is A. My reasoning is that they are all bonded to chlorine, so the further away the element is from chlorine on the periodic table, the more ionic the compound is and the higher the melting point is. The...

why are interstitial compounds tough to melt like Ti-c?

i know in mixture two or more substance are not chemically bonded whereas in compounds substance are chemically bonded and also in mixtures substance can be separated by mechanical method but not compounds But i want to ask how can i identify whether substance is mixture or compound if it comes...

How do you name compounds such as Ammonium Aluminium Sulfate? It should first be (NH4)+ then Al 3+ and SO4 2-, but how do you put then together? How do you know it is NH_4 AL (SO_4)_2 instead of, say, (NH_4)_3 Al (SO_4)_3 ? Thanks!

1.Which of the following compounds are nonpolar? 1) decene 2) decanal 3) 3-methyl-2-decene 4) 1,2-pentanediol 5) cyclohexanol Select one: a. 1,2 and 3 only b. 1 and 2 only c. 3,4 and 5 only d. 1,2,3 and 5 only e. 1 and 3 only 2. Which of the following compounds are polar? 1) 2-butyne 2)...

I want to ask the rate of reaction of organic compound is slower or higher than that of inorganic compound?? I have found an ansswer like that : The organic paricles are molecules. Because of strong covalent bonding within the molecule, organic compounds do not readily react. Reactions...

Rank the following in terms of decreasing nucleophility: CH3CO2- CH3OH CH3O- CH3CO2H NC- For compounds with oxygen, basicity parallels nucelophility. I attached answer from the book. Now, what I want to understand, is why CH3CO2H is more basic than CH3OH? I also attached the only pKa values...

i read formulae in textbook : [α]λt°C = Θ/L*C ...(i) where Θ is rotation in light and L is length of tube and C is concentration in gm/litre if we consider tube of lenth L and cross section area 'A' then C= M/A*L M is mass of sample so (i) becomes [α]λt°C = Θ/[M/A] so are...

I have read previous topics, but still the difference in compounds is not clear to me. As far as I understood, molecular compounds are made of covalent bonds, while ionic compounds by ionic bonds. I understand why Mn2O3 is ionic compound, because neutral Mn and O would make only MnO IN CASE...

Homework Statement For the titration of 50.0 mL of a 0.100 M solution of a dibasic compound with 0.0500 M HCl, calculate the pH at 100mL (equivalence point) and at 145 mL. pka1=2.46 pka2=9.41 Homework Equations (1)pH=pka + log[BH+]/[BH2+] (2)[h+]=sqrt((K1K2F)+(K1Kw)/(K1+F)) The...

Homework Statement Rank by acidity Homework Equations Br is lower on the periodic table, hence more acidic. But in the first compound, it is also farthest away from the carboxylic acid, which one gets priority ? The Attempt at a Solution I think The one with the bromo group closest to the...

I've learned that a more active metal displaces a less reactive one. So, according to the reactivity series Ca cannot displace Na but in he reaction given at http://en.wikipedia.org/wiki/Soap_scum Na is displaced by Ca. What is the reason for this exception?

Homework Statement Hello, so I think I've been looking at this problem way too long, and I'm going no where with it. It is in my attached picture, because it is easier to draw than write out on here. The key says these two are identical compounds, meaning they should have the same...

Homework Statement Not really much of a problem - just a general question and some speculation on its answer. Why do some ionic compounds such as aluminum fluoride form hydrates while other ionic compounds such as sodium fluoride don't form hydrates upon being dissolved in solution...

When analyzing the absorption pattern for different compounds when radiated by IR radiation, we see the wavelengths of the IR lights that is absorbed. These wavelengths correspond to the frequency at which the bonds in the molecule vibrate. My question is why a compound, for example an alcohol...

Why can have transition metals unpaired electrons in their compounds? In correlates to their multiple oxidation states, but I still don't know the explanation of it, that would make me satisfied - I suppose it's mathematical, as molecular orbitals are creating. Or is there any explanation?

Dear Comunity, I am running into a (probably pretty simple) problem here, yet the most simple things are sometimes upon me...:( I have a liquid solution which consists of 70% compound A and 30% compound B. I also have a bottle with 100% compound A. What I would like to do is to achieve a...

Hello, I was wondering conceptually, why does the density of the individual components change when they are added into a liquid mixture? So consider adding ethylene glycol and water together, when they are added to a container as a mixture, their densities are no longer their densities...

Hello Guys, So I'm trying to build a database of organic compounds that are of interest to the pharmaceutical industry. Most importantly compounds containing heteroatoms (>= 15% by mass). Where do i start!? any good websites or books, with a useful appendix you can tell me about? I would...

Homework Statement CuSO_4 \cdot 5H_20 Homework Equations The Attempt at a Solution We never learned this. I don't even know what it means to "multiply" compounds together...doesn't make any sense to me

Homework Statement NCl_{3} What is the Co-valency / Oxidation number of Nitrogen in this Covalent compound ? Homework Equations I think the table of electronegativity might be useful The Attempt at a Solution Nitrogen must be "-3" since it is more electronegative than Chlorine. The...

Homework Statement Give an acceptable IUPAC name for these compounds. http://i.imgur.com/tHUpwYK.pngThe Attempt at a Solution So the question is really on the 2nd problem in the picture but I need to reference the first one for my question. So my original guess on the 2nd problem was...

Hello, I would like to find out (or calculate) what the work function of AlGaN is. I do not really understand how to calculate workfunction for compounds. I know that the work function of Al is 4.06-4.26eV and Ga is 4.32eV... I can't find N. Is it possible to do a calculation for a...

Could someone give the proper chemical names of the attached two compounds. Lots of thanks in advance.

I got this problem today in my International Chemistry Olympiad Paper, quite bugging me this question, so I am better off asking it. My question is, which of the following has R configuration? From what I tried, I got both of them as S, and the remaining two options being confirmed...

I knew while learning about electrolysis that if the ionic compound is molten it becomes free moving ions. If that is the case, what will happen if I continued heating till it reaches the boiling point so that the ionic compound evaporates? Will it still be free moving ions?

Hi, What is the difference between alloy compounds and solid solutions I understand so far that solid solutions are homogeneous in composition, which must mean that one, two or more different atoms have same crystal packing structure when combined to form a solid solution.

I'm having trouble finding information on polyhalogen compounds ie CsICl2 when they are dissolved in solution. I've made dichloroiodide and I'm trying to figure out why/what happened when added to HCl/NaOH/and with KI added to both acidic and basic conditions, but I don't know how to...

First disclaimer: Xenon trioxide, while not existing naturally, can be created artificially. This question is not like "When did you stop beating your wife?" type. So...I read this compound is explosive. Well, a coke and mentos is also explosive. TNT is too. And then, I wanted to know is...

Homework Statement This is the statement out of a paper: Slurry 10 grams of ZnS with 3mL of .2N Cu(CH3COO)2 solution (corresponding to 0.6 atom % Cu) and 1.7 mL of .2N NH4Cl solution (corresponding to 0.34 atom % Cl) So my question is how did they calculate the .6 at. % and .34 at. %...

Homework Statement Hi. The combination of Fe(II), H2O, Cl- y NH4+ yields 3 coordination compounds, one of which is: [Fe(H2O)6]Cl2 Which are the other ones? Homework Equations The Attempt at a Solution Even though I sort of know how the compounds could be formed I don't why or rather , how...

Why is it that when you have an organic compound with a charge on the C, that charge takes the place of one hydrogen bonded to that C?

Allyl Bromide, during the addition of HBr gives CH_3-CHBr-CH_2Br CH_2Br-CH_2-CH_2Br CH_3-CH_2-CHBr_2 CH_3-CBr_2-CH_3 My take During the addition of HBr, electrophile will attack first, considering the shift of pi bond in allyl bromide as follows: BrCH_2-CH=CH_2 \longrightarrow...

Homework Statement Looking at questions 18-20 on this webpage: http://www.utdallas.edu/~scortes/ochem/OChem1_Lecture/exercises/ch5_stereo1.pdf (Answers given on end of handout)Homework Equations Meso compounds have an internal plane of symmetryThe Attempt at a Solution Compounds #18 and #20...