Question

3. R, S Configurations Assign R, S configurations to each indicated chirality center in the molecules below. 14. OH 15. COOH ---H CH NH2 HỌN H -CH3 HO alanine norepinephrine - 18. 16. HOC / OHH HV CH; НС . H7 HO COH CH2 dihydrocarvone tartaric acid

Answer 1

(14) So, the R or S configuration of the given molecule with their numbering of the group (priority wise) is given as below:-

(3) For writing R or S configuration, first we should priority of all four atoms which are attached to the central atom. Priority of group will be on atomic number basis. The group have more atomic number will come to the first (1) priority and least atomic number will come to the last which is (4) group. Now if the fourth group is in the below the plane and direction is clock wise then the configuration will be R and if the fourth group is on the above the plane and direction is clock wise then the configuration will be S.

(1) ОН но ...»н (4) но (3) , CH2NH2 (2) НО- (R)-4-(2-amino-1-hydroxyethyl)benzene-1,2-diol

(15) So, the R or S configuration of the given molecule with their numbering of the group (priority wise) is given as below:-

(2) COOH (S) ...CH3 H2N- (1) 'H(4) (S)-alanine

(16) So, the R or S configuration of the given molecule with their numbering of the group (priority wise) is given as below:-

OH НО,С Н ( (R) (3) s (4) н | (1) ОН сон (2R,3S)-2,3-dihydroxysuccinic acid

(17) So, the R or S configuration of the given molecule with their numbering of the group (priority wise) is given as below:-

CH3 HCL (1) (3) (29,5S)-2-methyl-5-(prop-1-en-2-yl)cyclohexan-1-one