Question

Ph 4. (2 points) Circle the correct name of the following structure. a) (meso)-hydrobenzoin HOH b) (1R, 2R)-hydrobenzoin HO- H ) (1S, 2S)-hydrobenzoin d) (1R, 2S)-hydrobenzoin Ph

Answer 1

Answer (4) H OH HoHH Here there are two chion - carbon shown by *' notation OH Ph. 아 Another representation. such type of molecules termed as "Hydrobenzoin" Now, it is important to name at the chiral centre of hydrobenzoin. To do that we need to follow "CIP" (caun - Ingold - Prelong) priority rnice and followed by. nomenclature. Priority of any chiral contre, should be on the basis of atomic number or atomic mass. H4) - here direction ie - - -- of priority has 1. Shown. rule: 6 if the priority direction is clock twise and lowest priority atom is horizontal then it will be 's' configuration. (i) if the priority direction is anticlock wis and lowest priority atom is horizontal then it will be - 'R' configuration. clockwise and then it will (i) I I if the lowest be priority priority 'R' dei direction is atom is vertically configuration

- ( if the priority direction is anticlock wis and lowest priority atom is vertically then it will be s' configuration. above Therefore following the our rule Ph Ph - OH H -OH - s 11 HO-aH HO- Here in both chira contres lowest priority in horizontally and priority direction the ® → 2 ③ →6] is clockwise in both cases, so both chiral centre is cs' Configuration. HGOH D correct name HO H (@) ('s, 25) - hydrobenzoin (c) (15, 25) - hyd ph