organic chemistry

  1. C

    Preparation of Ca/PO4/acetate solution.

    Hi, We need to perform an exploratory study on teeth demineralization. For this purpose, few publications have quoted the use of Ca/PO4/acetate solution containing 2mmol/L calcium, 2 mmol/L phosphate and 0.075 mol/L acetate at pH 4.5. Can anybody help us with the method to prepare such a...
  2. S

    PHENOL (carbolic acid) PROJECT HELP

    Hi I am doing PHENOL for a project and related it to a product called carbolic soap. Can Someone help me explain how it's used in Carbolic soap and what properties of PHENOL make it a good molecule to use in Carbolic soap. I know ITS A DISINFECTANT but how does phenol's structure play a role in...
  3. S

    Urgent! Unexpected NMR signal

    I synthesized aspirin in the lab and ran an H-NMR test. My solvent was CDCl3. In the spectrum a doublet signal appears at 4.77,4.82 ppm. I have tried thinking about any byproducts that might have caused this signal and searched the web with countless search terms trying to find a reasonable...
  4. I

    Help on homework

    (8) An artificial myoglobin our lab recently designed has two independent O2 binding sites. The experimentally observed Kd for the first site was 600 nM. (a) Estimate the observed Kd for the second. (b) The ΔGfolding for the protein in the absence of O2 is -5.5 kcal/mol. Assuming the unfolded...
  5. G

    Electrophilic addition of water using sulfuric acid catalyst mechanism?

    cant find the mechanism anywhere. this is the best idea i had. would greatly appriciate it if someone could verify it or show me the correct one.:)
  6. H

    organic chemistry-reaction mechanisms

    1. The problem statement, all variables and given/known data In pyrrole the electron density is maximum on which carbon atom? [​IMG]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...
  7. I

    Please help me draw this molecule from the IUPAC name

    I'm supposed to draw a molecule using it's IUPAC name, which is 5-methyhept-3-ynoic acid. Right now i have CH3 CH2 CH? CH2 CHCH3 CH2 CH3 don't know what to do about the ynoic acid part on the third carbon. what do I put there? please help, this is due tomorrow and i'm really lost!
  8. K

    Assigning electronic transitions

    How do we find the what kind of electronic transition it is for a molecule computationally? How do we arrive at any of the following transition for any UV-Vis spectroscopy of organic molecules. σ → σ*π → π*n → σ*n → π* Can someone please tell me how it is done.
  9. nurjanah

    need problem solution of organic chemistry book

    hallo I'm happy to join this forum. may be is there anyone know where to find problem solution of organic chemistry 10th edition by graham solomon?? really need the solution :(
  10. C

    Retrosynthesis Help

    Can someone please help explain retrosynthesis to me. I know you work backwards from the product to the reactants but unsure how to do that. Please help
  11. C

    Addition reaction, Please Help

    I need help with this O_chem problem im having trouble wrapping my head around it. How does Naphthoyl chloride bond with Indole. Please be as descriptive as possible, Here are the links to the structures...
  12. S

    How to predict the products of an organic chemical reaction ?

    How to predict the products of an organic chemical reaction ? What aspects should I consider ?
  13. M

    Organic Chemistry Problem - Alkanes

    The product of ethane undergoing dehydrogenation is called: A) propene B) methene C) ethene D) propane E) none of the above I have eliminated A, B, and D. I feel like it could be C. ethene because removing hydrogens would induce the carbons to form a double bond, but I don't know if that is a...
  14. U

    H1 NMR Explanation

    Hello all, I am working on the spectra from the following link: http://www.chem.ucla.edu/cgi-bin/webspectra.cgi?Problem=bp2 For the most part, I understand how the spectra available contribute to the answer, but the left (upfield) side of the proton NMR is proving confusing. I see how the...
  15. B

    Organic Chemistry: Inductive effect vs Mesomeric Effect

    I was asked to build a table featuring EWG and EDG of common functional groups , arranging them by its "power". First a table of decreasing Inductive effect; secondly a table of decreasing mesomeric effect and at last a table comparing them and defining "decreasing" Electron Withdrawal Power...
  16. D

    Araldite LY 556

    The chemical formula of this epoxy resin is C18H21ClO3. When I looked up the structure, I was confused because it has what seems like two separate structures. The IUPAC name for it is 2-(chloromethyl)oxirane;4[2-(4-hydroxyphenyl)propan-2-yl]phenol. I guess that's why there's a semicolon, because...
  17. D

    Araldite LY 556

    Hello. I wrote a question here instead of introducing myself :p
  18. D

    Help with Deooxyribose

    Currently, I'm doing a research project about deoxyribose (C5H10O4). However, several question have arisen. We've only gone over alkanes, alkenes, alkynes, and cyclocarbons in class; does deoxyribose fall into any of these categories? I was thinking cyclocarbon, but its final link is oxygen, so...
  19. C

    Retrosynthetic Analysis Help!

    Please help me with retrosynthetic analysis. I have tried to solve different ways, but get stuck halfway through. Here is a link to the molecules. THANK YOU! Here are the assignment directions. Please choose one molecule from the list of four molecules below and devise a retrosynthetic...