Organic Chemistry

Urea is known to form hydrogen bonds with water. Will it react with the carboxylic acid side chains of proteins in aqueous solution to form a covalent bond? or will it form both, covalent bond with carboxylic acid and hydrogen bond with water?

We just did a Wittig reaction in Ochem lab, and the solvent we used was DMF. Looking at the structure of DMF shows it has a carbonyl, similar to the carbonyl of the substrate the Wittig reagent was attacking (cinnamaldehyde). My question is, why doesn't the DMF react with the wittig reagent and ruin the reaction?

I know alot of compounds can make you pass out fairley quick, bt whats the most popular one. I got in this big argument on another forum thats wasnt even science related. He said it was chloroform. what is the molecular formual. What is it? I said it was ethyle that was most popularly used for this application. I dont know what either of these are, but i got in a argument and i knew this guy had no idea whats going on anyway.

what are 2 chemicals that cause heat and are not flammable

I've heard that dissolving cellulose in CS2+Alkali then poring a thin stream into an acidic solution makes Rayon.What acid and alkali works best.

I'm sure this is simple enough but for some reason my brain is not willing to work with me! Theobromine (a structural analogue of caffeine) dissolves easily in acids and bases, but is poorly soluble in water. Why is that?? Thanks for any advice offered:)

Hello! Today in the morning a friend of mine showed me his final exam in "Organic Chemistry I". He was disappointed because he had worked hard and didn't get the mark he wanted. The link of his final exam : http://multivinum.googlepages.com/home. I saw it and I think also it has few questions , it more hard than it should be, and it doesn't cover most concepts of Organic I (from easy to difficult : it seems to be mostly difficult, and many topics of "Organic I" are not covered). Can anyone pass it? (this kind of final exam). I remember a final exam of a professur from Denver, and it was for all kinds of students (and a lot of questions also). I would appreciate also a…

I guess the title covers it... I'm just doing some thinking and would like to know what that combination would be? I know if the H2O evaporates you end up with salt? So what is it before the H2O evaporates? Any suggestions, comments and opinions are greatly appreciated. Thank you in advance.... Catharsis

whats the name of this? .....CH3 ......| CH3CCH2CH2CHCH3 ......|...........| .....CH3.......CH3 ................../.\ .............CH3.CH3 please ignore the periods, i can't make normal spaces without making this weird. Is this 2,2 ,5,6 - tetramethlyheptane?

It was on the side of the VBI (Virginia Bioinformatics Institute) building at Virginia Tech, I'm really carious about what this is.. If you guys need more pictures I can post more! Thanks

I'm confused about the structural formula of carbon monoxide. I was taught that carbon always needed to have four bonds, so now I'm confused ... I might sound clueless, but I didn't even know there was such a thing as a triple covalent bond. Wikipedia shows the structural formula with three bonds: http://en.wikipedia.org/wiki/Carbon_monoxide I'm assuming I misunderstood my teacher when I thought he said it always had 4 ... But my question is, wouldn't CO be really unstable if it had only three covalent bonds?

Hey all, just wondering if anybody had any insightful tips on sitting down and completing an arrow-pushing mechanism. I know it's a weird question but I always miss points on tests because I just don't know which electrophiles get protonated, etc. Any response is appreciated! thanks a lot

If one were to put Ascorbic acid in the bottom of a beaker and pour sulfuric acid over it what would be the product? That is the sulfuric acid would certainly draw H2O out of the acid as it would sugar but what would be the resulting compound left over from the ascorbic?

Something i having trouble finding, are there any sources you know of that lists the absorption spectra of organic compounds? What i really need to know is the absorption spectrum of nicotine.

I have not been on these boards long, so excuse me, but I am sure you guys can help with a cure for cancers. This is called DCA - dichloroacetate and seems to help to destroy cancer cells by turning on respiration in mitochondria. Doctors have started using this for desperate terminal cases of cancer. http://en.wikipedia.org/wiki/Dichloroacetic_acid How can you help? Can you: a) come up with a way to make dichloroacetate in a living room with simple chemicals and, b) come up with a way to purify DCA easily? That way, everybody can make it themselves and purify it and we can avoid the greed of pharmaceutical companies making it available to…

Out of random curiosity, would it be possible to knock off the hydroxy groups of a gem diol and replacing them with bromines? Granted, the reactivity of this new gem dihalide would probably much greater than the diol... but under what conditions could one push the reaction to happen?

I was wondering if this would work. If I mixed sodium chloride, and hydrogen peroxide, then I would add hydrochloric acid into the mixture. Would that work. Note "I don't plan on making this yet until I have the right safety protection stuff".

I need to make the acetal of a polyol but I'm limited to NMP (or DMF or DMSO) as a solvent. I was planning on using methane sulfonic acid as the catalyst, but I'm wondering if the acid will just protonate the amide solvent. Any suggestions?

meta-bromophenol Dear Friends I am happy to join to you , and i have some headache of the m-bromophenol can you please help me about this three points of m-bromophenol: *discovery *applications *it's preparation (with reactions) i will be happy if i find this info. thanx alot Jamal .

Ok, our teacher has a weird style of teaching. Before teaching anything, she tests us on our knowledge. So, we are learning organic chemistry. And I want to know what I should know before the class. If anyone could help, it would be especially appreciated...

can someone help me out with these reactions Benzene + (CH3CH2)2CHCuLi and PhC(=O)CH3 + Tollen's reagent

Hello! I am having trouble with all of these questions. I have spent about 8 hours on them, and I have given up. If someone could just give me the answers, I would appreciate it a lot. Once I have the answers, it makes it easier for me to understand why the answer is so. Thank you so much for the help! Questions 3 & 5 http://s302.photobucket.com/albums/nn109/homie_rot/?action=view&current=terrypg1.jpg Questions 6 http://s302.photobucket.com/albums/nn109/homie_rot/?action=view&current=terrypg2.jpg Questions 7 http://s302.photobucket.com/albums/nn109/homie_rot/?action=view&current=terrypg3.jpg Question 8 http://s302.photobucket.com/albums/nn1…

Hi there, I am making a Tiramisu-flavored frappuccino (milk coffee) pudding - I know, dont ask - and need to find out which (combination of) acid would best help me reduce my pH (currently at 5.9 per my own $400 pH meter) to reasonable 3.8 levels while acting as a natural preservative. I have 4 favorites in mind: citric, lactic, ascorbic and acetic acids. Do you recommend a combo (like citric/lactic) or is just one milder organic acid fine? (I am watching the aftertaste too). The dessert will be air-sealed (like any glass-bottled fruit juice) and could be stored either at room temp or in the fridge. Any thorough answer appreciated... Thank you, Mat…

Hi, i'm newbie. Can anybody list the Taft parameters for NH2 and NHAc groups? I couldn't find it.

Great forum---lots of great info---thanks! I am working on a home project, and maybe you can help me. I have a small piece of copper pipe (its an end cap for a 1 inch copper water pipe). I want to reduce the weight of the cap by approximatly 1/2. (as bought from the store it weighs about 1.5 ounces---I would like to get the weight down below 5/8 of an ounce) I can accomplish this mechanically by milling the piece with a rotary file, but it takes alot of time---I am looking for an easier way. I know in the aircraft industry, they sometimes use chemical milling to form parts to the desired shape (they dip parts into a solution, and it dissolves part of the metal un…