Organic Chemistry

Hello everyone, I am re-crystallizing dl-methionine and I am trying to remove it's smell. I would imagine that it's the sulfur that is causing the smell? Could anybody help me on how I can remove the sulfur from it? Or the odor some other way? Thank you!

Hey, i have to find out what my product is in suzuki cross coupling lab. We were given an unknown aryl halide and aryl boronic acid. My lab didnt go to well and for some reason my product never melted even at high temperatures. The TA gave us an NMR to use to find out what our unknown is. Can someone help me find out what my 2 unknowns are through nmr?

Rosorcinol (1,3-dihydroxy-benzene) can be converted to phloroglucinol (1,3,5-trihydroxy-bezene) by [heating] fusion with solid sodium hydroxide. the reaction also releases hydrogen gas. "THE LIBERATION OF HYDROGEN FROM CARBON COMPOUNDS", Shipley Fry, Else L. Schulze, Helen Weitkamp J. Am. Chem. Soc., 1924, 46 (10), pp 2268–2275 Journal of the Chemical Society, Volume 60 (Great Britain), p191 A dictionary of chemistry and the allied branches of other sciences, Volume 4, p488 It would appear that whereas phloroglucin[ol] is the tautomer of 1,2,3-trihydroxy-benzene, phloroglucin, which is a partial imine of a tri-ketone, is the tautomer of 3,…

Do biphenyl system show geometrical isomerism?

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http://www.mediafire.com/i/?e52rjbs9tf3btlc this is supposed to be Tricyclo[3.2.1.02,4]octane, 3,3-dichloro- (9CI) or norbylene reacted with dichlorocarbene can you please help me confirm the identification? thanks!

Hi there, I have a question about a question. in the picture I have attached, the question says that the alkene undergoes hydrobromination. However, to me, the reaction given looks like a halogenation, not a hydrohalogenation. I was wandering if I am correct in thinking that or if I am missing something. Thank you

Hello, I need help with a problem that involves drawing structures. The question is Compound A with a molecular formula of C6H10 decolorizes Br2 and produces a precipitate when reacted with permanganate solution. Hydrogenation with H2 over Pd/C produces B with a formula of C6H12. Reaction of A with peroxyacetic acid produces C, which is highly strained. Hydration of C produces D. Reaction of A with osmium(VIII) oxide followed by work-up produces E which is an isomer of D. C can also be produced by addition of A to bromine water followed by heating. Ozonolysis of A produces a single product E which is a symmetrical diketone. Draw structures for A,B,C,…

Hello everyone I have a couple of questions on some mechanisms i have been working on. Here are my questions and work: Problem #1 The following cyclic polyene undergoes an ozononolysis reaction at room temperature. Draw the structure of the intermediate formed after the first step. Draw the structure of all organic products formed from the reaction. Indicate products as major, minor, or equal amount.

How would I perform a retrosynthesis on this molecule? The starting material should be commercially available. Any idea on how many steps it would take?

This is in response to my previous post on evaporating. The boiling point of this particular substance is stated in the procedure to be 111-114 degrees celcius. The solution did boil at this temperature and evaporated very quickly. Near the end of the evaporation the color changed from light yellow to black (final dried product was also black) and i'm not sure if this is a sign that I raised the temperature too high or if it is supposed to be black (The procedure dosn't say anything about color) If the BP is stated, is it a fair assumption that I can evaporate off the liquid at that temperature without having to worry about the substance decomposing?

I have an assignment in my organic class (First semester of organic for chemistry majors) to show how to perform the following synthesis. We can only use reactions that we have covered in class this semester which include: alkene additions (hydroboration, oxymercuration, etc.), reactions of alcohols (oxidation, converting to tosylates/mesylates, reduction), epoxide formation and breaking reactions, nucleophilic substitution and elimination, metathesis reaction, Grignard reaction, cleavage of glycols. We are graded on using the most efficient method, and get bonus points if we include another method. I started and am stuck on how to get the starting material…

Does anyone know the approximate pKa of the alpha CH (the chiral proton) on a protected amino acid such as tyrosine or where i can get this information? My interest in this is because i want to couple together two amino acids using the wittig reaction and i need to choose a base which avoids epimerising the amino acid chiral centres.

Ascorbic Acid -> Oxalic Acid So there was a thread about decomposition of ascorbic acid on ScienceMagness.org and a user said Quote: Originally posted by Sriraman The path way of decomposition of Ascorbic acid is Ascorbic acid to Dehydroascorbic acid to 2,5 Diketogulonic acid and then to oxalic acid and L-threonic acid. you can guess which gives yellow colour-possibly 2,5 diketogulonic acid due to its two ketonic functions Ascorbic Acid is readily valuable from health stores as Vitamin C but most of the time it isn't 100% Ascorbic Acid, my tablets that my family get has Sodium Ascorbate also in it so i could probably dissolve the whole table…

Which would you think is the best software for molecular modeling?

As we all know, to determine whether a reaction of substitution is Sn1 or Sn2 is by following the reaction rates of different reaction mixtures containing controlled amount of reactants to find out the type of rate law such that if the rate law is first order, the reaction is Sn1 and if that is second order, the reaction is Sn2. My question is, how could we follow the reaction rate that involve intramolecular substitution? I think we can't do this by simply changing the reactant concentration as both the substrate and the nucleophile now are in the same molecule. How can we know whether that substitution is Sn1 or Sn2? e.g. epioxidation of CH3(Br)CHCH(OH)CH3

I'm looking at a catalytic cycle that uses CuI and acetonitrile to generate Cu+ ions in order to convert EDA and 1-hexyne into ethyl oct-3-ynoate via a diazo coupling reaction. I have no clue how these Cu+ catalytic ions form. How are the Cu+ catalytic ions made? I'm assuming acetonitrile breaks apart the Cu-I and forms solvation shells around the ions. But that is just a guess.

I'm going to be taking two semesters of Organic Chemistry and am wondering if a model set will be beneficial? If so what models work well as I've noticed prices ranging from the upper teens to around fifty dollars. TIA.

How effective is carbon filtration for removing "hot" particles and radioiodine? I live in a non flouridated ar.ea. Ove always used a 4 stage seriea carbon filter to make my drinking water seeing as its very effective on pretty much everything but fluorine. But what about reactor debris? I live in california.do i need a RO system to be certain of purity?

Thought I might make a most considering how quiet it's been around here lately. Currently in my project I am looking at making a series of meta substituted phenolic ethers that contain nitrogen-tethered 1,3-dicarbonyls, which are precursors for later studies. I've made a few and designed some protocol for others, but there is one that I am yet to look at, so I thought I might post it here to see what strategies people could come up with. This is the structure: With similar products, I've taken a convergent approach and started with a 3-methoxybenzyl bromide and the dicarbonyl, deprotonated a position in the 1,-dicarbonyl ring with strong base (LDA or n-Bu…

what does ultrafilterable mean? example non-ultrafilterable magnesium thanks

Hello yall, a professor in an oral test asked me about reacting a silyl enol ether with a michael system and catalytic amounts of a tertiary amine. I was reminded of baylis hillman. He said that this was exactly right and wanted me to draw the product. Unfortunately i didn't understand how that was supposed to work with a silyl enol ether. He said that it would be the same product as with an aldehyde. I don't understand that. I've never seen a silyl enol ether as an electrophile. After some research on the net I couldn't find anything about it. What do you think? Is he wrong? Am I just confused? Any response is appreciated!!

In my organic chemistry class, the lecture notes and professor does not label any of the reactions as "SN1, SN2, E1 or E2," and nor does the textbook. However, many of the video tutorials online as well as in my prior organic class at another school, we used such classifications. Can anyone explain why this is such?

Hello Chemistry Community! I basically have to choose which polymer is better for water piping, though there is some chemistry I am not understanding associated with the relations of tacticity, crystallinity and strength of the polymers. (PVC and HDPE) I did some research, and found that PVC is atactic (or heterotactic) because of the Chlorine units on the backbone (yet it doesn't say why the chlorine makes it like that?). This makes PVC more amorphous making it harder to arrange into layers , making it less crystalline, unlike HPDE (which is very crystalline because it's non branched and syndiotactic).PVC is known for its strength and durability, apparently it's …

My friend gave me this slip of paper the other day and I have absolutely no clue as to what it means. I am a history major and its bothering me terribly as to what it is (I have OCD). My friend won't tell me what it means. I'm not even sure if its really anything. I've hit a dead end and all I know is that H2N is ammonia. Any help would be great. Thanks for looking.