The structure of the major product obtained from ( R , R ) isomer of the amine is to be drawn. Concept introduction: In Hoffman’s elimination reaction, the less substituted alkene as the more favourable product, whereas according to Zaitsev rule more substituted alkenes are considered as more favourable product. The notations E or Z are used to describe the geometry around the double bond of an alkene, whereas nomenclature cis or trans is used to describe the relative configurations ( R or S ) . In the cis or trans compound, the molecular formula remains same but arrangement of the atoms in space is different. Cis or trans and E or Z are not interrelated to each other.

Question

2. Name the following hydrocarbons. (9 marks) a) HHHHHHHH H-C-C- H-O-S b) HCEC-CH3 H H H H H d) c) H C=C- H H H e) CH3 CH3 CH2CH=CH-CH=CHCH3 HHHH H-C-C-C-C-H H HH H f) large CH2CH3 pola H3C section lovels tower, able ocart firs g) Tower H3C-CH2 then in H3C-CH-CH-CH3 enblbano bne noitsidab Copyright © 2008. Durham Continuing Education CH3

Answer 1

Question

Chapter 19.15, Problem 19.22P

(a)

Interpretation Introduction

Interpretation:

The structure of the major product obtained from (R,R) isomer of the amine is to be drawn.

Concept introduction:

In Hoffman’s elimination reaction, the less substituted alkene as the more favourable product, whereas according to Zaitsev rule more substituted alkenes are considered as more favourable product. The notations E or Z are used to describe the geometry around the double bond of an alkene, whereas nomenclature cis or trans is used to describe the relative configurations (R or S). In the cis or trans compound, the molecular formula remains same but arrangement of the atoms in space is different. Cis or trans and E or Z are not interrelated to each other.

(b)

Interpretation Introduction

Interpretation:

The formation of the Zaitsev product using stereochemical drawings of the transition states are to be shown.

Concept introduction:

In Hoffman’s elimination reaction, the less substituted alkene as the more favourable product, whereas according to Zaitsev rule more substituted alkenes are considered as more favourable product. The notations E or Z are used to describe the geometry around the double bond of an alkene, whereas nomenclature cis or trans is used to describe the relative configurations (R or S). In the cis or trans compound, the molecular formula remains same but arrangement of the atoms in space is different. Cis or trans and E or Z are not interrelated to each other.

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