Organic Definition and 449 Threads

So I've always realized that organic chemistry and physical chemistry were huge gaps in my scientific background, and I still can't fill them up for some time, as I have many other subjects to study. But I've read large sections of molecular biology books (like Alberts and Lodish), and I've...

Homework Statement For complete oxidation, 1mol of an organic compound requires 3mol of oxygen gas What could be the formula? a) CH3CHO b) CH3CH2OH c) CH3CH3 d) CH3CO2H Homework Equations The Attempt at a Solution What does it mean by complete oxidation? Is it combustion?

Homework Statement The Attempt at a Solution I'm confused on what is happening in this reaction, and where carbo-cations are being formed. Any help would be great. Thanks.

HI! I want to know the order ofacidity of p-nitro phenol, acetic acid, picric acid and formic acid. Please help quickly. Thanks...

Hello. I have a query regarding organic chemistry. 1. http://tinyurl.com/y9nvg2p See question number 21. 2. Homework Equations : None 3. The first Carbon atom beneath the top-most CH3 group I can tell is a chiral centre, as it has 4 different groups attached to it (C=O, CH2...

Why does delocalization of the negative charge over the ortho and para positions of aromatic rings increase the stability of the phenoxide anion? Why do the ortho and para positions increase the stability but not the meta position? Please explain. Thank you.

If you dehyrate 1-butanol, wouldn't you get 2-butene due to rearrangement? This is not a homework question. This is an mcat review question. The question asks: when 1-butanol is dehydrated, the new compound's heat of hydrogenation is most likely? The answer is between 30 and 33 kcal/mol It...

Homework Statement http://i.imgur.com/H8p56.jpg 2. The attempt at a solution I'm not quite sure how to start this one... I would assume organolithiation could get me started for the two combining, but I'm not quite sure how to get the 3' carbon to spout that ehtyl group or how to...

Homework Statement Hi all, i have to identify 5 samples (1,2,3 were solids, 4,5 were liquids) by classifying them as 1) Aliphatic or aromatic and 2) Carboxylic acid, amine (primary, secondary, tertiary) or ammonium carboxylate We did a burn test on the solids, tested solubility in water...

Homework Statement What would be the product of the reaction between trifluoroacetic anhydride and 2 butanol. This is a secondary alcohol. When a primary alcohol like methanol reacts with trifluoroacetic anhydride it forms methyl trifluoroacetate, but what 2 butanol form with it? I tried and...

Why do ten molecules of toluene that enter a GC column at exactly the same time not reach the detector at the same time? Why are London Dispersion forces of the sample molecules strongly influencing GC measurements? And why are they negligible in TLC experiments on silica gel? I have no...

when drawing the structural formula for 2-methylbutane or 2,3-dichloro-2-methylbutane,does it matter which end of the chain i begin counting from?

(maybe it fits better in this forum) Hello, I have been asked an advice about waste heat to power systems (say wh2p). The available waste heat to be considered is a (dirty) gas in a temperature range between 250°C and 450°C. The useful power that could be generated would range between...

Hello, I have been asked an advice about waste heat to power systems (say wh2p). The available waste heat to be considered is a (dirty) gas in a temperature range between 250°C and 450°C. The useful power that could be generated would range between 2MW and 10MW. I know some examples...

Alkanes are saturated hydrocarbons which are very unreactive. However, they undergo combustion, i.e. they react with oxygen. Why? (Even compounds as unreactive as polythene with over thousands of carbon atoms per molecule undergoes combustion...)

There is lots of talk about how hard Organic Chemistry is, so I ask, what did you think of Organic Chemistry if you took it, and how did you excel at it if you did? What were your weaknesses?

This is for a friend: The worksheet says: Name the following comounds: It has a picture, which is a benzene ring with 2 PhD groups off the 1 and 2 positions. Is also says "THis one is a pun. See if you can figure it out!" Thanks, nkk

For example, what happens if you put an apple in space? Or what happens when animals (or people) are frozen to very low temperatures?

Homework Statement A question on a pretest asks me to name this. I know it's either (1R,2R) or (1S,2S)1,2-Cyclopentanediol because the OH's are facing in opposite directions, but I'm not sure how to figure out if the OH's are S or R 2. The attempt at a solution I somewhat have an...

In the oxidation of organic chemicals, are there any conditions that must involve water or must not be in the presence of water or the oxidation process will stop despite the presence of the oxidizing agent? I remember my teacher saying something about this, but I don't remember which one it is...

Hi guys, I've got a question which i couldn't solve. Both napthalene (two benzene ring join together) and benzoic acid are aromatic compounds which exist as white solids. Based on their physical ahd chemical properties, describe how you could separate the components of a mixture of these...

Over the past month, with the approaching date of the Copenhagen summit, several news and scientific articles have been prominently dedicated to various environmental issues, namely organic farming, the sustainability of keeping high levels of meat in our diets and its growth in developing...

Homework Statement Project 7: Identification and Separation of a Metal Chloride and an Organic Substance Here is an open ended lab we have to do for general chemistry: A chemical manufacturing company which produces a variety of specialty chemicals has come across an old waste jar...

i know this is a physics forum, but i figure you guys might like chemistry too? and i know you guys probably took up to orgo to get your physics degrees. anyways over the summer session assuming i pass my current classes and my classes in the spring, i will be taking orgo 1, orgo 2, and...

Alright, I've got a bunch of physical data and an IR Spectrum, but somehow it doesn't seem to match up with any compound I find through google. Even worse, I have a list of compounds it should be and there's still no obvious winner. Any help is dearly appreciated. Clear, yellowish liquid...

Im trying to name the following molecules 1- CH3-CH2-CH-CH2-CH-CH2-CH2-CH3 l l CH3 CH2 l CH3 2- CH3-CH2-CH-CH2-CH-CH3 l l CH2 CH2...

!Organic chemistry reaction I just wonder is there any ways to predict the catalyst and other conditions for a certain organic reaction to happen?

Homework Statement The experiment was changing dimethyl maleate into dimethyl fumerate, with the intent of being analogous to changing maleic acid into fumeric acid. In the experiment, we added 1 M Bromine in dimethylchlorine to our dimethyl fumerate, put the mixture in a hot water bath and...

Homework Statement Hello all. Im not sure how to get the image of the organic compound i need to name on here, but I think I can do a good job of describing it. The compound I need to name is a cycloheptane with three substituents on it. These substituents are bonded to three consecutive...

Organic Chemistry Reactions - Check my Answers, Please! :) this is the lab that we have to do in class: http://academics.eckerd.edu/instructor/grove/gorgchem/Extraction%20Lab.pdf http://picasaweb.google.com/lh/photo/cnIZmcws9cN3v_1TDx7nfg?authkey=Gv1sRgCI-xv4Hl9tampgE&feat=directlink

Hi, I'm going to be taking O chem this quarter in college. I took a year of general chemistry last year, but didn't do so well in the first two out of three quarters. Now I think that I don't remember anything from general chemistry. what do i do?

I have Been wondering a lot that why we cannot separate the organic compounds from the functional groups. And this is not established by the inorganic compounds! What looks strange to me even more is that whenever a reaction occurs we face the functional group and these functional group are...

can someone help me with this question? Draw the most important resonance contributor of the following structure? if its to small http://img196.imageshack.us/img196/8417/48084902.jpg

Homework Statement A chemist has three liquids (Ethanol, butanoic acid and 3-heptyne) labelled P,Q,R (in no specific order). When drops of bromine solution were added to samples of each liquid, P and Q decolorised the bromine, but R did not. When drops of sodium carbonate solution were added...

In the Diels-Alder reaction between anthracene and maleic anhydride, why is it carried out in xylenes rather than in ethanol?

Homework Statement CH3CH=CHCH3 What's the cis and trans structure name for this formula? Homework Equations The Attempt at a Solution I've drew the ciis and trans structure H\ /H C = C / \ CH3 CH3 this is the cis the tran is similar to...

1. In the chair conformation, why would 1-bromo-tetrahydropyran be more stable in the axial position, as opposed to the equitorial position? (Hint: consider how the bromo group affects the attached carbon and what the oxygen could do to alleviate that.) 2. No relevant equations 3...

Homework Statement An alkene H---C=C---F ____|_| ___Cl__I reacts with H2 in the presence of Pt. What will the dominant product be? Homework Equations See below. The Attempt at a Solution Syn addition will occur, so the hydrogen atoms will either be in the front or...

Hi, I'm in first year organic chem and we're obviously learning about all the different reaction mechanisms (e.g. elim reactions of alcohols) and I was wondering if the only way to figure out what is going to happen in a particular reaction is to memorize all these different reaction...

After promoting one of the electrons in the 2s orbital, the 2s orbital and two of the 2p orbitals undergo hybridization to form three sp2 orbitals, leaving the other 2p orbital unhybridized. But why is the hybridization necessary? Isn't the three 2p orbitals sufficient to form three identical...

http://www.telegraph.co.uk/earth/earthnews/5835975/Arctic-sea-full-of-huge-blobs-of-floating-goo.html http://www.adn.com/2835/story/864687.html Anyone else heard about this yet? Are we under attack from some alien life form? :o Any theories as to what could explain this? Edit...

Homework Statement When 100 mL of an aqueous solution containing 1.0 g of caffeine is extracted with 10 mL of chloroform at room temperature, 0.5 g of caffeine is transferred to the chloroform layer. Calculate the distribution coefficient of caffeine between chloroform and water at room...

Homework Statement We did an experiment in lab today where we were given a compound and we had to figure out the chemical formula and molar mass using titration (titrated with NaOH). The compound I got was phthalic acid, and the average molar mass I got was ~135g. This is about 30 grams off of...

So what is the difference between thimerosal and straight mercury? Is it more or less harmful?

Homework Statement When reacting chloroethane with sodium hydroxide, what are the products? The Attempt at a Solution I think there are two possible solutions to this problem. One possible solution is ethanol and sodium chloride, through a substitution reaction. Another solution could...

Homework Statement Modern organic chemistry is the study of: a) only molecular compounds b) only petrochemicals c) only natural molecules d) molecules of carbon The Attempt at a Solution I think the answer is c) because organic chemistry looks at molecules of (dead) plants...

can degree of freedom and phase rule be applied to organic reactions,is it possible to degree of freedom above 3?

and why is biochemistry important in medicine? I kind of know why, but i can't find that much information so I am stuck and i need a bit of help if anyone could help me? Ive read that organic chemistry serves as a basis of biochemistry and biochemistry is the study of chemical processes in...

Hi. I was to plan and conduct the reduction of 4-t-butylcyclohexanone into 4-t-butylcyclohexanol using NaBH4 as reducing agent, MeOH as solvent, and NH4Cl. My question is about the use of NH4Cl. How does it act as a quenching agent? I've figured out that it acts as a quenching agent by removing...

This is a general Organic Chemistry question. How do the reactivities of the following compare? Acyl Chlorides, Esters, Anhydrides, Amides, Ketones, Aldehydes The Attempt at a Solution I know the following "ladder:" MOST REACTIVE acyl chloride anhydride ester amide LEAST...