trans-3,6-Dimethyl oct-4-ene (A) exists in two diastereomers (I)and (II) If the stereochemistry about the double bond in(A) is cis-, the total number of stereoisomers for (A) is:

Question

trans-3,6-Dimethyl oct-4-ene (A) exists in two diastereomers (I)and (II) <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/86a703bfd6d56770e63dec9d8e3c27c5-.png" /> If the stereochemistry about the double bond in(A) is cis-, the total number of stereoisomers for (A) is: (A) 2, pair of enantiomers (B) 3, one pair of enantiomers and one meso form (optically inactive due to the presence of centre of symmetry) (C) 3, one pair of enantiomers and one meso form(optically inactive due to the presence of plane of symmetry) (D) 2, both optically inactive due to the presence of both centre and plane of symmetry

Tardigrade Admin · Accepted Answer

If compound (a) is cis, we get two diastereomers, (III) and (IV). (III) is meso (O.I.A.) due to plane of symmetry. (IV) is 0.A. (two enantiomers). Total stereosiomers when (A) is cis =3

Q. trans-3,6-Dimethyl oct-4-ene (A) exists in two diastereomers (I)and (II)

If the stereochemistry about the double bond in(A) is cis-, the total number of stereoisomers for (A) is:

2, pair of enantiomers

3, one pair of enantiomers and one meso form (optically inactive due to the presence of centre of symmetry)

3, one pair of enantiomers and one meso form(optically inactive due to the presence of plane of symmetry)

2, both optically inactive due to the presence of both centre and plane of symmetry

If compound (a) is cis, we get two diastereomers, (III) and (IV). (III) is meso (O.I.A.) due to plane of symmetry. (IV) is 0.A. (two enantiomers). Total stereosiomers when (A) is cis $= 3$

Q. trans-3,6-Dimethyl oct-4-ene (A) exists in two diastereomers (I)and (II) If the stereochemistry about the double bond in(A) is cis-, the total number of stereoisomers for (A) is: