dentify the stereocenters in each of the following molecules as R/S or achira f required, the same answer can be used more than once. i.e. there may be t somers or "S" isomers, etc.) Choose carefully. H - CH3 1. Risomer 2. Sisomer но 3. achiral molecule H2N > >

Help please

5. Instead of redrawing the molecule to make the lowest priority group point back, alternatively, the lowest priority group can be swapped with the group that is currently pointing back. This is now the enantiomer of the original compound. The procedure is described below. Determine priorities of the groups attached to the stereocenter. Swap the lowest priority group with the group that is pointing back, and redraw (this is the enantiomer). iii. Determine the absolute configuration (R or S) of the enantiomer. iv. Determine the absolute configuration (R or S) of the original compound. i. ii. Answer the following questions. Completely fill in the circle in front of your chosen answer. (a) Assign priorities of the groups at this stereocenter (1 = highest priority; 2 = second priority; 3 = third priority; 4 = lowest priority). Each group must have a different priority: CH3 Br H CH3 *Br H3CH₂C H 3 O 4 (b) The absolute configuration of this compound is: OR OS CH₂CH3 1 02

For the following molecules: a. How many stereogenic centers are present? b. How many stereoisomers are possible for these molecules?

For each organic compound in the table below, enter the locant of the highlighted side chain. compound CH 3 | CH₂ - CH - CH₂ - C - CH₂ 1 1 CH3 - CH₂ I CH3 CH3 CH₂ CH3 t CH₂-C- CH₂ - CH - CH₂ CH3 CH3 1 CH3 CH₂-C- | CH3 CH3 locant of highlighted side chain 0 3

Describe the relationship of the following pairs of molecules as identical, enantiomers, diastereomers, or constitutional isomers. Br Ме, Н Me CI Me i. CI Br H Me H CI, Et Me CI Et Et. ii. Me Et Me CI Mee CI iii. none of the other answer choices are correct O i. = diastereomers; ii. = identical; iii. = enantiomers i. = diastereomers; ii. = constitutional isomers; iii. = diastereomers i. = enantiomers; ii. = constitutional isomers; iii. = diastereomers O i. = enantiomers; i. = identical; iii. = diastereomers

Please help with parts K,L,N. If you notice any incorrect please let me know.

For the molecule below, a) Draw out every possible stereosimer.  b) Indicate any enantiomer pairs c) Then, indicate any meso-stereoisomers, and proceed to clearly indicate the internal mirror plane.

Please answer parts G,H,I

A)Circle all of the stereo centers in MDMA. B) assign the absolute stereochemistry (R or S) for each stereo center