Question

9 Draw the molecule shown below in the Fischer proiection and give the chirality of cach chiral center in the molecule. Draw the other 3 stereoisomers of the molecule in Fisher projections also- showing the chirality of cach chiral center. (6 points) CA CaH d) Draw the structure of (3R)-3-ethyl-2,3-dimethylheptane paying attention that you have shown. the correct stereochemistry. (3 points):

Answer 1

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Aceaing to Cahn Ingokd frelog Rule, we Can firt A/s configuroten Give prioity to aHached atom/ g roup ot atom accordng to Atomic Number Rule 1 to f aitome number is sme, than give priority acco rding atomic maSs Rule 2- 4 th position. 1f it i change in the Reault , if it ii not so AFter assigning number, preditt thi Rule 3 on vertica Jine no Reverse tha recult Hassigning , Rotate the number Clock anti clock fim 23 neqleching the mone . Rule Let's start on tha basis of atomic Number NH2 got 1st priority 2 priovity gien hext atom afkr c-atom is o-atom 3 prionty gan COOH NH2 the group to -C-OH H atom dras& Ein- 4h prionity is on horizonta Anti Neglechirg 4 one S Clockwise ine so change he renult Ans is Now ue find Stereochemistry of omer example Ani HH2 Neglechi as 4 A) chck H Hooc Here again 4t prieity is on Horizanka Lina so charge Ans is (R He reat COOH Clockwise Melect R CH3 bur 4h priovg is on he rizantas Line so chang tha Reault Ans i

Stereaisomers ), (2) ,3 ? <-) CI Br anddlc Vaaib ja If e find R/S configuratien ef gien C H C Br CIP moiecule 1 Снрн H rule the it named Q BT CO2H o th e e chiral center C-2 С-2 B с 3 Contain C-3 (R) 4 different atom oT goup Сн2.Он Ct20n of atom to faom chirc Po H CarbDn H C H Сн,он Сн2он сон Co,н H Br Cc-2) R (с-3) S LC-22 S CC-a R C co,и CH20i кюСир Mirror H Ct CH 20 CH20 CO2H CD Br (C-2) R (C-2) S Ci Ci H (c-3) R (C-3) S Со2H HTo TTTIITTTII

d) (BR)-3-methył-- 2,3-dimethyphaptano C НC 3 2 On the basis of ciP Rule gave attachad atun obove НCHC 3 Clockwise R