Organic Definition and 449 Threads

Homework Statement Histidine is an amino acid. It is not soluble in water but it will dissolve in water when dilute sodium hydroxide is added. The question has two parts to it: part-a) Write an equation for the reaction that occurs between histidine and dilute sodium hydroxide...

Is there any particular reason other than "law of nature" for us to consume organic compounds which are high energy compounds. Are inorganic compounds not so energy rich like organic compounds? What are the reasons? I couldn't really figure out where to post this question, in bio or chem.

So my mother buried her cat 5 years ago this month. I remember I wasn't home back then and it was a hard time. Yesterday we were talking about this and she asked me if I think the body is completely gone, and I said of course until she mentioned she put the cat in a plastic bag before buring it...

Homework Statement Im having some problems with some oxidation and reduction mechanisms. I am not sure if I am doing them correctly. Homework Equations 1. O=C=O + CH3-MG++I- 2. Acetone + NH4+, Na+ H3BCN The Attempt at a Solution 1. I break one of the bonds from the oxygen...

What do the indices 6 and 13 stand for in 6,13-pentacenequinone? I know that is related to the position of the substituents in the molecule, but I cannot figure out how to interpret it. Can some one point me to a reference where the basics the nomenclature are explained? Thanks,

Homework Statement I've been asked to explain how would I synthesize an organic compound, its structure is attached as an image (first attachment) , could you help me figure it out? I'm supposed to start from benzene The Attempt at a Solution So far, I've got a big part of the...

Homework Statement Why is petrol suitable to be used as a fuel whereas lubricating oil is more suited to lubricate machine joints? Homework Equations The Attempt at a Solution Petrol has a low boiling point. It combusts more easily to provide energy to the car. However...

Help with Organic Rankine Cycle Project please! Moderator's note: this thread is from May 2011 Hi there everyone, I'm posting here in the hope that someone will be willing to help an engineering layman do some calculations, I'm a plumber not an engineer. Thanks to anyone who decides to help...

Homework Statement I'm trying to figure out the mechanism for a reaction catalyzed by MacMillan Generation 1 and 2 organocatalysts. Not going so well. I don't understand what role the organocatalyst plays in the reaction. I read a paper about MacMillan and I think it was saying that the...

Homework Statement Name the following Compound Homework Equations I attached an image of the compound The Attempt at a Solution This is my attempt, although I don't know if it's correct or not, because I don't have an answer key. 2,3-chloro-methyl-4-bromo pentene but...

For Calculus, there is Spivsk. For Physics, there is Kleppner and Morin. For General Chemistry, there is Pauling. All of these books are introductory, and focus on hardcore conceptual understanding. They are widely received as the most rigorous and best way to learn these subjects. Now...

Homework Statement Homework Equations N/A The Attempt at a Solution I attempted to figure out the mechanism in reverse. I have tried neucleophilic addition of the alcohol to the carbonyl carbon of the ethanal, followed by the addition of the resulting hydroxyl group (from the...

Homework Statement I was given and writing assignment which requires me to write a two-page report on how an organic matter like a potato can exist according to the Laws of Thermodynamics. I will be evaluated on how well I explain scientific principles and how accurate my statements are. The...

My studies have nothing to do with biology, but I'm just a curious gal so I thought to pick up some ebooks or whatever. I got a good biology base and a good chemistry base, but I never tackled anything in the realm of organic chemistry. I'm more interested in learning about the chemistry of...

My understanding is that for EAS, Friedel-Crafts Acylations/Alkylations will only work for halobenzenes or better (in terms of electron donating groups). Does this mean that F-C won't work for a halobenzene that also has a nitro group on it, due to the extreme withdrawing effects of the nitro...

Homework Statement Name the following (organic) molecule: http://img827.imageshack.us/img827/1883/organicmolecule.png Uploaded with ImageShack.usHomework Equations The Attempt at a Solution Would this be 3-pentene? The root has to be "pent" because that's the longest carbon chain, right?

Homework Statement Rank the solubilities of these organic compounds from lowest to highest: Hydrocarbons, aldehydes, alcohols, carboxylic acid. The Attempt at a Solution I know that hydrocarbons is the lowest - it cannot form H bonds with itself nor can it form H bonds with water...

What are similiarities between ether and alcohol and how can we use at least 2 physical properties to differentiate between them? For ex, alcohol has a higher boiling point, so what "procedure" would I follow to test the boiling points to find out which is which.

Hello guys I'm taking O-chem right now and it is giving me so much work constantly that I am seriously starting to purely hate it. How am I supposed to do all this? this is ridiculous. I'm still trying to understand the last chapter when we start a new one. My O-chem teacher is nice and all but...

Hi all, I have decided to do a second degree since my first degree (math) hasn't given me many options for work or graduate study that I'm interested in pursuing. I am strongly considering chemical engineering, since I am enjoying my chemistry course so far and have the strength in math to...

We saw this originally on an Israel website, but it is here too: We have been replaying these for a couple hours now. There are at least four different videos of the same event. Neat! :smile: http://www.theepochtimes.com/n2/content/view/50545/

I'm reading in my organic chemistry text about the structure of alkyl halides, as a background to why certain reactions happen (specifically radical halogenation). In it there's a table of halomethanes, that tells the bond length, bond strength, and dipole moment. It pretty much looks like...

Homework Statement Pyridine and pyrrolidine react rapidly with dilute aqueous HCl to form the corresponding hydrochloride salts which are easily purified, isolated and stored in a charge. However, pyrrole, which is another nitrogen-containing heterocycle, does not form a hydrochloride salt...

I just finished taking the first quarter of the honors organic chemistry series at my school and ended up getting a B. I would like to work hard to get an A next quarter, and I was wondering whether it is worth spending time reviewing the material from first quarter to prepare for 2nd quarter. I...

So let's say a hydrogen is replaced with an oxygen. Apparently this is an oxidation. But I just don't see any transfer of electrons going on. All the atoms still have the same number of valence electrons. Can someone give me an example of a simple organic oxidation and explain the electron...

Costco has 2 types of Vanilla organic soy milk - one is kept without any cooling with an expiry date after a year, the other one is kept refrigerated, with the same expiry as regular milk. What's the difference between these two?

1) My book says that we can distinguish between 2 hydroxy butanoic acid (A) and 3 hydroxy butanoic acid (B) by haloform tests. It says that B gives positive haloform test. I am fine with it. I don't get why A doesnot give positive test as it is also a sec. alcohol . 2)In the base-catalysed...

i was wondering the polarity of ethyl acetate and nitrobutane, which one is more polar? As i face this question in test(liquid chromatography using normal phase and reverse phase) Asking for the elution order, i am not sure which one is more polar? Can anyone answer my question? Also, if i...

Homework Statement Hello, We were supposed to fill in the missing products or reagents (I indicated which ones on the paper) but out of 40 points, I got 13. So now I'm a bit worried. I tried to redo it, could someone look it over? (see attached jpg) The Attempt at a Solution My...

Homework Statement Give the structural formula of the organic product formed from the following reaction: CH3COCl + C6H5NH2 Homework Equations The Attempt at a Solution The ethanoyl chloride will break into CH3CO(+) and Cl(-) due to polarity. Then, which part of the...

Homework Statement Design and describe a step-by-step total synthesis, using appropriate reagents, and drawing the reactants and the products resulting from each step-by step reaction to obtain B from A. Total # of carbons must stay the same. A is cyclopentanol, B is cyclopentane with a...

please explain abt amorphous and organic semiconductors...their properties ...nature of classification ...examples..etc..

I have a few questions about organic chemistry. First of all, when is it acceptable to leave out the 1's when naming compounds? I've read that it's ok to leave out the 1 for something like bromobutane, as everyone will assume its on the first carbon. What about dibromobutane? Is it still...

I started doing organic chemistry lab a few weeks ago and the instructor is an evil bastard when it comes to marking lab reports. We've 2 reports to do per week and I spend at least 6 hours on each report but only manage to get 60%. I can't be wasting all this time on a single class. Are there...

Hello all, I understand that an increase in pressure yeilds an increase in temperature (in gases). However, I was wondering if extreme pressures can raise the temperature of organic molecules (such as the tissues in a human body) to melting point. Thanks!

Please help me name the organic compound:) Thank you:)

Homework Statement The Attempt at a Solution I want to recognize the Cl as a good leaving group. After leaving, I get the ionized form of the chloroazirine reactant. Then, I want to draw some resonance structures to move the charge around the ring. I do not understand the...

Homework Statement The polymerization of propene to polypropylene progresses through a radical mechanism. Complete the propagation step of the reaction mechanism diagram by drawing in the missing lone pairs, radical electrons, atomic charges, and electron-flow arrows where appropriate. 2...

I need to write 3-5 paragraph for a topic about science, non-science reported like science , or pseudoscience. I want to know if Organic food is a topic for pseudoscience? If so, what should I write about? I want to write how healthy organic food are, better tasting, chemical-free, etc. This...

Hello I have done some lab work where I have coated a wire with an organic layer. The density of the organic layer is 800kg/m^3 and the density of the wire is 2620kg/m^3. I assume 1wt% of the wire is the organic layer the rest is the wire. The mass of the wire with organic layer is...

Are there any compounds that are considered "organic," yet do not contain carbon?

Hi, I've been meaning to switch over to chemistry ( in hopes of doing forensic work in the future ) from math. I have no chemistry background, so I have been self-studying over the summer.. However, the first chemistry course offered at my university is an organic chemistry course. People tell...

This is a matter of some curiosity to me. Deliquescence was often mentioned in chemistry, and I've seen at work, but is this phenomina limited to a few special cases, such as water? Are the intermolecular forces between any organic compounds sufficeint to essentially "drown" the solute in...

Homework Statement [PLAIN]http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs527.snc3/29952_406506367415_501337415_4229454_854152_n.jpg Homework Equations Alkyl halides can undergo substitution reactions (via SN1 or SN2 mechanisms) and/or elimination reactions (via E1 or E2 mechanisms)...

Homework Statement I've been given the IR spectrum, 1H NMR, and Mass Spec data for an unknown and must identify it correctly and assign all significant spectroscopy/spectrometry signals to the molecule accordingly. I am probably 95% sure that my compound is ethyl phenylacetate, and I've...

Hi I was wondering if anyone might be able to offer an explanation why the Fe3+ complex ion containing 5 water ligands and 1 thiocynanate (the classic blood red complex) appears to be able to distribute equally between an organic and an aqueous layer but a cobalt 2+ complex ion containing 4...

Can anyone provide and briefly explain 2 examples of how organic chemistry can be used to improve existing products, and thus provide solutions to newly identified health or environmental problems? One example I was given was unleaded instead of leaded gasoline, but I need 2 others!

Why are sp2 carbons more downfield than sp3 carbons? Is it because the bond length of sp2 carbons is shorter (electrons are more localized-thus more shielded)?

Hi, I am trying to understanding how esters can form a cyclic alkane. Could someone explain the mechanism for this? I would guess that we'd have to hydrolyze the ester in acidic condition to carboxylic acid. The hydroxide then can attack the carbonyl to form a ring, but that would give us an...

I am trying to figure out how you can get the formula of a compound when you are given mass spec data. The mass spectra data I have are m/z and the % of base peak. If there is anyone that can guide me in the right direction, that would be awesome :)