Organic chemistry Definition and 260 Threads

Homework Statement Draw this formula in line angle structure. CH3CH2OC(O)CH2CC(CH2)3CH(CN)CHO. Homework Equations None. The Attempt at a Solution I'm confused with the CC(CH2)3 part of the condensed formula. I knew I got it wrong the first time I drew it because I couldn't just tag three...

This going to be a long post ! Orbital Dilemma: i) Why there is opposite phase orbital for s-orbital? [ Couldn't find any representation on the web except for a pic in Ian Fleming's Molecular Orbitals and Organic Chemical Reactions,pg3) *I assert no right over the image,image is referenced...

Hi all, I know that some you have chemistry backgrounds (mine is in nuclear physics), so wanted to pose a question for a friend who is a chemist and is thus not on this site. He has a degree in biology, with emphasis on synthetic organic chemistry. His overall GPA was ~ 3.2 (3.4 in major). He...

I would like to ask for somebody to point me in the right direction - any literature I could read - regarding the mechanism behind color changes that an organic solution undergoes due to changes in pH. I am not referring to organic indicators or dyes, specifically. I have observed in my...

I would like to understand more about the mechanism of polysaccharide dissolution in a solvent that which it is soluble in. Do they maintain polymeric structure (glycosidic bonds) and only lose side-chain bonding (H-bond) among each other? Or are will their glycosidic bonds be compromised...

I'm starting a chemistry course in a few months & I'm a little nervous as my math skills aren't that good. Could anyone tell me which type of maths I'll be using in the course based on the modules that I need to complete? I'll like to work on my math skills in advance. Thank you :). Here's a...

Homework Statement Predict major product and what type of reaction mechanism Homework EquationsThe Attempt at a Solution Top Problem: So the Bromine is a good leaving group, and is in the secondary position so you cannot rule out anything right away. The nucleophile is charged, so it will be...

My professor drew the following molecule on the board and asked us how many pi electrons this aromatic molecule has. Everyone in the class said 14, as there are 7 double bonds, with two pi electrons from each bond. He told us that there are only 10 pi electrons in this molecule, refused...

Which property of compounds, organic ones in particular, can help us predict their charge(s) at a specific pH? Is pKa/pKb the only one? I would like some confirmation on this. Thank you very much!

Homework Statement Lets say i have C5H10O.. The IHD is (5x2+2-10)/2 = 1 IHD So now i use my IR chart and i determine i have ketone Now i want to find the new IHD and also figure out what other atoms i have left. So i need to subtract C5H10O by ketone and figure out the new IHD. Homework...

Could someone explain to me why the ring structures in this photo are diastereomers? From looking at them, I see a plane of symmetry, and no chiral centers so I'm unsure how they're diastereomers without have R/S characteristics

I would like to buy a textbook to learn about this subject, and I was wondering if anyone had any ideas on what to buy, thank you very much for any responses. Not too expensive please. I am teaching this to my self if matters. Not part of university or other courses.

Hello. I am trying to learn about synthetic chemistry, which I have so far found rather difficult to learn without guidance. So, in reality this is two questions, which I think are most appropriate to include together. First, can you provide an order that I should learn topics of synthetic...

Homework Statement In is more acidic than but In (para nitro phenol) is more acidic than (ortho nitro phenol) why? Homework Equations in ortho nitro benzoic acid due to -I and -M effect it is more acidic than it's para species (-I effect more in ortho position) . The Attempt at a...

Homework Statement In pyrrole the electron density is maximum on which carbon atom? so if the numbering starts from nitrogen, the carbon on the right side of nitrogen let it be numbered as 2 and the next one as 3 and so on... which of the following options will have the carbons of maximum...

In my textbook, i have read about unimolecular elimination and nucleophilic unimolecular substitution reaction of organic compounds. In those reactions, firstly one bond breaks automatically then as soon as a carbocation forms then a nucleophile attacks the carbocation to complete the reaction...

Hi. I have a question about Organic and Physical Chemistry. I have already finished General Chemistry I and II and got decent scores on both of them (B on both of them). I am interested in taking Organic Chemistry, then Physical Chemistry afterwards. I know that both are different from General...

Homework Statement Why is ethanol a bad choice for recrystallization of phthalic acid? 2. The attempt at a solution I know phthalic acid is very soluble in water, so water is a great candidate to recrystallize phthalic acid. I also know water and ethanol are not miscible. But I don't know how...

Is it possible to do a Friedel-Crafts reaction on a benzene and get a substituent on the benzene ring from that, and then afterwards add an NH2 group ortho? I know you can't add NH2 first and then do Friedel-Crafts because anilines cannot undergo Friedel-Crafts. Please advice. Thanks in advance.

I got a D in Gen Chem 1 and a D+ in Gen Chem 2. Mostly because of missing homeworks and I was taking 5 classes at the same time. But when I restudied both of them, and took Organic Chemistry, I managed to get A- in both Orgo 1 and 2. How will graduate school see this? And also, if I were to...

Baking a cake entirely with the chemical lab equivalents of traditional baking ingredients has always been something I've wanted to try. Now, I have the chance (i.e. the time) to do so or, at the very least, figure out how it would be done. I need some help with what would actually be put...

5-ethyl-4-methyloctane. Why can't we name this compound as 4-ethyl-5-methyloctane?

Homework Statement Propose a given synthesis of each of the following compounds starting with 1-butene a) 2-chlorobutane b) 2-methoxybutane c) 2-butanamine d) 2-butene (mixture of cis and trans) e) butane The attempt at a solution I have the structures for 1-butene, as well as each of the...

Are ketones saturated ? for example , Acetone ( CH3COCH3 ) my question is aroused by a question in the General Secondary Education Certificate Chemistry exam here in Egypt , as the question there was : How many moles of hydrogen molecules are required to react with one mole of : 1) Acetone. 2)...

This is a post sharing some easy to follow tutorials for students majoring in organic chemistry. Hope people in related needs can benefit from this resource.1, ChemDraw Magic - an advanced video lasts less than 15 minutes on drawing molecules faster. As an introduction, the presenter drew Viagra...

Hello, I will be taking Organic Chemistry 1 in the fall. I've been reading some sections of organic chemistry 8th edition by john e. mcmurry. This book is required and I was wondering if there's any other chemistry books. When I read it, it makes it hard for me to understand what it's saying...

Homework Statement Please see question number 31 http://cms.fiitjee.co/Resources/DownloadCentre/Document_Pdf_183.pdf Homework Equations none The Attempt at a Solution i got up to second step in the solution(scroll downwards) but in the last step a carbocation is formed and double bond can...

My teacher says that "N" has no plane of symmetry(POS). But shouldn't the plane shown with blue be POS? I understand that a plane of symmetry bisects a molecule into halves that are mirror images of each other. For this reason, this plane shown here should be the POS. Where am I...

Two questions: 1. What tools and techniques are typically used to determine and plot spatial distributions of compounds--particularly organic ones--in interstellar dust? 2. Is it presently possible to determine distributions of compounds along arcs distant from the galactic center? If so, can...

I'm looking for examples of some interesting compounds that contain alcohol functional group (please, no joke suggestions about various liquor). Bonus points for creativity/thinking-outside-the-box. Thanks.

I am currently studying nucleophilicity of molecules and am getting a set of conflicting information, so I wanted to clarify nucleophilicity trends with respect to solvent. The link below discusses how nucleophilicity increases down the periodic table with protic solvents and decreases down the...

I found this book while searching online for something and thought some people here might like to see it. It's an organic chemistry course from 1912. http://djm.cc/library/Principles_of_Organic_Chemistry_Norris_edited.pdf

Does an amino group or ethyl group have greater steric hindrance? Is there a "rule" that I can follow to determine this?

I'm having a lot of trouble predicting which compounds would be extracted into which layer (organic vs. aqueous) using acids and bases. Using the solvents dichloromethane (which would form the organic layer) and sodium hydroxide (would form the aqueous layer along with water), I am asked to...

Homework Statement State true or false: The boiling point of propanoic acid is less than that of n-butyl alcohol, an alcohol of comparable molecular weight. Homework EquationsThe Attempt at a Solution Is this just a question where you either know it or don't OR is there some argument based off...

hi i am in the natural cosmetics industry and would like to have a scientific understanding of my craft. Accordingly do i study chemistry, organic chemistry or is there something else i should be looking at.many thks

The question asks: Recall that you observed very little corrosion occurring on the iron nail immersed in NaOH(aq) solution. This observation is difficult to explain from an electrochemistry perspective since electrochemistry principles predict a spontaneous reaction that should cause...

Why is diphenol aromatic? Shouldn't it be anti aromatic as it has even pair of pie electrons?

Is there a good book that contains various methods for qualitative analysis of organic compounds? (Like Tollens test for aldehydes).

Why is carbanion stability directly proportional to s character?

Homework Statement What is the major product of the following reaction? (Its CHCl3) Homework Equations Reimer Tieman reaction The Attempt at a Solution This reaction looks like the Riemer-Tiemann reaction. The only difference is the reactant. First step is the formation of carbene. Then...

CH3Br + Nu- → CH3Nu + Br- The decreasing order of the rate of the above reaction with the following nucleophiles is: [ Nu = (I) PhO- (II) AcO- (III) HO- (IV) CH3O- ] My answer is IV > III > II > I However the answer is IV > III > I > II I'm having a hard time understanding why...

Homework Statement hi so in my lab class we made a buffer solution by mixing 20.00 ml of 0.100 M Sodium Hydroxide and 40.00 ml of 0.100 M of acetic acid. We then poured 15ml of this buffer solution into a beaker. So we essentially have 15 ml of this buffer solution in the beaker. We then added...

If nucleophile is ambident and solvent is polar aprotic, more electronegative atom is free to attack the substrate. Since more electronegative atom is a hard base, it forms a stronger bond with hard acids like carbocation. This promotes formation of carbocation by substrate. Hence, SN1 reaction...

actually my teacher told ketones don't but certain sites tel that they do...but few sites say that they dont? what's correct??

Recently, I read two chapters from March's advanced organic chemistry. I came across gauche effect and SN2 reactions. In both phenomena, ##\sigma-\sigma^*## orbital interactions is involved. In gauche effect present in 1,2-diflouroethane, the C-F bonding orbital becomes an antibonding orbital so...

Generally, anti confirmation is more stable. But in case of 2-fluoro ethanol and 1,2-difluoroethanol the gauche confirmation is more stable. It's given in March's advanced organic chemistry book that intramolecular Hydrogen bonding is not the correct reason for the stability. Wikipedia explains...

Homework Statement Which side does the equilibrium favour? Homework Equations Equilibrium favours weak acid or weak base (I don't know why :frown:) The Attempt at a Solution Using the given pka values, since the reactant is the weaker acid, reactants are favoured. (Backward reaction is...

1. Complete structural formula, identify the absolute configuration of each asymmetric center (if it applies) Bond rotation may be necessary2. Is the first one right? The second one which is Newman must be turned to boat and then I write it in the boat?The Attempt at a Solution : On the paper[/B]

Homework Statement Give the IUPAC nomenclature of the following compound (in the attachment) (sorry, i don't know why the picture has become upside down!) The Attempt at a Solution Shouldn't the answer be 1-phenyl-2,3-dibromopentane? The book says it is 2,3-dibromo-1-phenylpentane.