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Chapter 4: Q76P (page 143)

Name the following:

Short Answer

Expert verified

We have to find the names of these compounds:

a) (R)-3-bromo-2,5-dimethylhexane

b) (2R,3R)-4-methyl-hexane-2-ol

c) (2R,4S,6S)-4-chloro-6-methyl-2-octanol

Step by step solution

01

How to find configuration

1. Assign the priority order to the groups on the basis of atomic number. Higher the atomic number get highest priority.

2. Double bond is considered as carbon is attached to 2 carbons.

3. Triple bond is considered as carbon is attached to 3 carbons.

4. Lowest priority group is always on dotted line.

5. If lowest priority group is not on dotted line then exchange the group with that group which is on dotted line and to maintain the stability of the com[pound we have to exchange other two compounds also.

6. Then according to priority order we have to determine the configuration. We have to go highest priority order to lowest priority order and if we go clockwise then it is R configuration and if we go anticlockwise then it is S configuration.

02

How to naming compounds

1. Select longest parent chain.

2. Functional group has to be given lowest number.

3. If two Functional groups are present then give number according to priority order.

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Most popular questions from this chapter

Citrate synthase, one of the enzymes in the series of enzyme-catalyzed reactions known as the citric acid cycle (Section 24.9), catalyzes the synthesis of citric acid from oxaloacetic acid and acetyl-CoA. If the synthesis is carried out with acetyl-CoA that contains radioactive carbon (14C) in the indicated position (Section 1.1), the isomer shown here is obtained.

a. Which stereoisomer of citric acid is synthesized: Ror S?

b. If the acetyl-CoA used in the synthesis contains 12C instead of 14C, will the product of the reaction be chiral or achiral?

a.Which of the following compounds can exist as cis-trans isomers?

b. For those compounds that can exist as cis and trans isomers, draw and label the isomers.

1 CH3CH = CHCH2CH2CH3

2 CH3CH2 C = CHCH3

|

CH2CH3

3.CH3CH = CHCH3

4. CH3CH2CH=CH2

Draw the Z isomer of an alkene that has a CH3and an H on one sp2carbon and isopropyl and butyl groups on the othersp2carbon.

(S)- (+)-Monosodium glutamate (MSG) is a flavour enhancer used in many foods. Some people have an allergic reaction to MSG (including headache, chest pains, and an overall feeling of weakness). Fast food often contains substantial amounts of MSG, which is widely used in Chinese food as well. (S)-(+)-MSG has a specific rotation of +24.

a. What is the specific rotation of (R)- (-)-monosodium glutamate?

b. What is the specific rotation of a racemic mixture of MSG?

Draw a perspective formula for each of the following:

a. (S)-2-chlorobutane

b. (R)-1,2-dibromobutane
See all solutions

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