Organic Chemistry

Is anyone familiar with methods for detecting free radicals except EPR (ESR) spectroscopy? I'm particullary interested in detection of free radical via polymerization reactions i.e polymerization of acrylonitrile and acrylamide. What are the exact experimental conditions for this kind of detection to work? Well here is my problem - we have been investigating this redox reaction and we suspect that it's mechanism involves free radicals. We have done the EPR spectroscopy but results came out negative, so my mentor said we can try to do polymerization test to be sure there aren't any radicals present at all (since this result is a bit odd). Our reaction only occurs under…

What side reaction can occur if you react an unknown alkene with bromine and another one with potassium permanganate?

Dear every one ! Please help me the procedures to make Poly Acrylamide or guide me where to approach this process. Thanks you.

Ok, im having a lot of trouble with a lab I did. The lab was the hydroboration of 1-phenylcyclohexane. There are three outcomes of this reaction: 1-phenylcyclohexanol (Markov. addition), cis-2-phenylcyclohexanol (anti-markov. anti addition), or trans-2-phenylcyclohexanol (anti-markov. syn addition). Now, it's clear that the third outcome would be the major product. However, I was given an H-NMR of this compound and the questions asks how do I know, based on the H-NMR, that the third outcome is correct? What peaks or absense of such peaks can be used to determine this? The peaks on my NMR sheet are: a singlet on 0 PPM, a sextet between 3 and 4, and another sing…

I'm need some advice about spectrometry. I'm looking for a forum like this where someone could help me. I'm trying to do analysis of extremely small samples of a solid... as small as possible, such as nano meters to micrometers. It doesn't really matter how the substance is analyzed as long as the device can produce consistently different results for substances that are made up of fairly different molecules or relative number of elements for example. ANY IDEAS HOW I CAN GET ADVICE? I'm working on a research project but lack the knowledge about existing technology available to me. As a side note... the short term goal of the project is to do extremely accurate…

Hello. I am a student working on a research project. I have been searching for the specific polarity of arginine, an amino acid. I was hoping to find a specific number for the polarity, but I could not find anything. Does anyone know 1- where I can find this number? 2- How I can obtain this number? 3- If anyone knows this number, can I have it? Thanks!

Hey guys, Does anyone know if question 6B is to do with the resulting carbocation being stabilised by an electron-donating methyl group in the R1 position, etc? And more stabilisation if R2 is Ph? So R1=ME, R2=Ph is most stable and the one with both R1 and R2 as H is least stable?? http://www.chem.canterbury.ac.nz/courses/tests_exams/2004texams/exams/chem262.pdf P.S. If poss, any thoughts on question 4a here would be appreciated too: http://www.chem.canterbury.ac.nz/courses/tests_exams/2006texams/endofyear/chem262.pdf

Hey all, i'm learning about alkene mechanisms and had a general question regarding AMA. Can something that usually only does MA have an exception and do AMA? If so, how, thanks.

Why do enantiomers work differently in biochemical systems when they have the same physical and chemical properties? Also why do enantiomers that rotate plane polarised light to the left usually work.

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Can you tell me if I've categorized these reactions correctly? It is quite possible that I didn't, so I'd love to hear from you! SN1: NaI + n-BuBr NaI + t-BuBr NaI + n-BuCl AgNO3 + n-BuCl AgNO3 + t-BuCl AgNO3 + n-BuBr AgNO3 + n-BuI SN2: NaI + i-BuBr NaI + s-BuBr AgNO3 + s-BuCl I was unsure of how to approach classifying the "normal" n substrates, so any help would be appreciated! Thank you so much for helping

I cant seem to figure this out. If a benzene ring has 2 substituents 1) OH group 2) COOH group and we are attacking the electrophile carbon in the carbonyl CH3C=OOC=OCH3 (acet. anhydride), why is the O from OH rather than the O from the OH in COOH used? Both cant go through resonance, so what other differences would there be.

I learned about what makes a good nucleophile. But take a sample case RCO2H is the carbonyl oxygen more nucleophilic or the oxygen attached to the proton? - they both have resonance (??)

Hi all, Can someone explain step 1 to 5 for me?? I'm trying to understand this reaction and I don't understand it. Appreciated if you guys could give me a detail explanation of each step. Please see below for the reaction diagram. Thanks a lot! -Louis

Hi... Now I just wanna confirm the belief that I have, or would like to know that I need to revise it.... Sweating and it’s ability to cool the body: From what I understand the water rises to the surface of the skin collecting electrons from (it’s) surrounding area “evaporating” hence cooling the body by taking the electrons from the surrounding area. No? Any comments suggestions and opinions will be greatly appreciated.... Thank you in advance...

I just atempted to make ethyl citrate and wouisld like to know how this ester smells as what i just made has a distinct smell of nail polish as i cant find any anything on ethyl citrate.

i was trying to make iodoform with sodium hydroxide, acotone, ethonol,and iodine tincure.when it got late i netralized the mixture with a dilute sulfuric acid/3% hydrogen peroxide mixture.After they where combined it turned blood red and was iritating to the eyes.what did i make?

Hi, I need some good information about adamantane. could you help me pls. Thank you very much!

I've recently been researching the organic molecule amygdalin and discovered that it has been used as a cancer drug. One of the unfortunate circumstances that causes it to be banned as a drug by the FDA is the increased toxicity of the HCN product when mixed with ascorbic acid. Any ideas how to counteract this?

Hey i was just wondering about a few properties of dimethyl sulfoxide. DMSO boiling point - 189 degrees C DMSO flash point - 89 degrees C If i have a 70% aqueous solution of DMSO (30% distilled H2O), would it be possible to do a fractional distillation to remove the water? What i mean is, would it be safe to heat the 70% solution to 100 degrees to remove the water, without the DMSO igniting? I mean i would be heating it with a hot plate (no naked flame), so as long as there are no naked flames, would i be safe to assume that i could heat the DMSO to 100 degrees and separate it from the water? Any advice would be greatly appreciated! thanks, rick

How is the reaction of PBr3 with phenolic and similar kind of hindered aromatic alcoholic group.

Dear gentleman/lady: I’m a student in University of Akron. I want to buy some “carboxyl functionalized glass spheres” with 300nm diameter. I checked the some website, such as Duke and Bangs. It is pity that only the glass spheres above 3 microns (µm) are available. Can anyone give me some advice about “carboxyl functionalized glass spheres” with 300nm diameter? Thanks and best wishes to you! Best Regards

What are electron withdrawing and electron donating groups? What makes a good donating/withdrawing group?

does any body know how to alkylate an amino adamantane? that is to prepare adamantane-amine-alkyl??

hey, i was just reading a patent on alkali metal carbonates. US patent : 4,495,107 . (can get the link if needed) Ok so i was wondering, what are my options for a solvent that could dissolve the urea, but not the alkali carbonate? I read that an inert solvent which doesnt really dissolve the alkali carbonate but dissolves the urea can be used. Any thoughts on toluene or xylene? any other suggestions?