Determine the specific configuration for the four stereocenters below. H3C OH fO H3 H- H3C -OH...
What is the correct R/S configuration for each of the three stereocenters in the molecule below Choose the best term that best describes the relationship between this pair of molecules 1) What is the correct R/S configuration for each of the three stereocenters in the molecule below (1 mark) CH3 -ОН Н- -ОН Н- -OH Н- CH2CH3 a) 2R, 3S, 4R b) 2R, 3R, 4S c) 2S, 3R, 4R d) 2S, 3S, 4R е) 28, 3R, 4S 2) Choose the...
H3 C H2Br Br2, H30* HC X CH3 HzC CH3 H3C CH3 Aldehydes and ketones can be halogenated at their a-position by reaction with Cl, Br, or 12, under acidic conditions. Using Br2 under acidic conditions, an intermediate enol is formed which adds bromine at the a-position. The reaction stops after the addition of one bromine because the electron-withdrawing halogen decreases the basicity of the carbonyl oxygen, making the protonation less favorable. Not started curved arrows to show the movement...
redraw the structure below as a wedge/dash structure and label all stereocenters with their absolute configuration. I'm having some difficulty with this, you can see my two guesses below. 애 (b) Redraw the structure below as a wedge-dash structure and label all stereo centers w/ their absolute Configuration - Br a Br CI Be HTML TOH
18. Assign the absolute configuration of the two stereocenters in stereoisomer of 2-bromo-3-pentanol shown below. Br ОН a) 2R, 3R b) 2R, 3S c) 2S, 3R d) 2S, 3S 19. The following are 5 stereorepresentations of 1,5-dimercaptopentane-1,5-diol. Taking (1) as a reference structure. Determine if each of the other stereorepresentations are conformers to (1), enantiomers to (1) and diastereomers of (1). OH OH Enantiomer Diastereomer Conformer HS SH (2) он SH Enantiomer Diastereomer Conformer OH OH HS "ОН (3) ON...
6. Determine the product of the following reaction. A. H3C H O CH H2SO4 CH OH OH H3C CH CH Hoc H3C H3C OH CH D. Hoc CH CH Hoc
Q1. Give R and S configuration to the following compounds (5 Marks) C2H5 i) H3C-C-H OH C2H5 ii) H2N-C-CH2-CH2-CH3 H ОН iii) H CH2-CH2-CI iv) HO-H2C-H2C-C-CH2-CH2-CH3 1 Н. C/ H2C H-C-CH3 CH2
3. For the structure below determine the number of stereocenters. Determine the number of stereoisomers for the structure and draw all of them? Determine the enantiomers and which are diasteriomers. Determine the absolute configuration for both for both enantiomers. 10 pts 4. What would be the observed optical rotation of a sample of 3.2 R of pure (.) - 3-chloropentanoic acid with a specific rotation of 30.0 degrees in 100 ml of water, measured in 25 cm cuvette. 4 pts...
3. Assign Ror S configuration to the following molecules: Br 1 F H- F H F Br Br -CHO CH=CH2 S R R H CH2CH3 CH2CH3 --CH₃ CH3 CH2 H -CH=CH2 CH3 H3C HY -CH(CH3)2 OH
3. Assign R or S configuration to the following molecules: Br F H F . Br F Br -CH CH=CH2 H CH2CH3 CH2CH3 CH3 CH2 --CH3 OH H -CH=CH2 H3C 7 CH3 H CH(CH3)2
4. The following reaction has a small, positive AG and takes place slowly at room temper H3C-Cl + H-OH - H3C-OH + H-CI (a) The mechanism for the reaction is shown below. Which bond is being broken in the sky step? Which bond is being made? slow Step 1 H3C-Cl + H-OH- - H3C-CH3 + CI endothermic fast Step 2 H3C-OH3 + 1 - H2C-Cl + H-CI exothermic (b) Based on this multi-step mechanism, draw a free energy reaction coordinate...