CHEMISTRY - OBJECTIVE -2

  4. 

C2 is rotated anti - clockwise 120 degrees about C2 - C3 bond. The resulting conformer is 

(a) partially eclipsed  (b) eclipsed          (c) gauche                (d) staggered

answer - (c)

Answer explanation : answer is gauche. gauche means less energy configuration . Other configurations involved are staggered,eclipse and Anti conformers.

This means gauche position of atoms in molecular structure has less stress-strain factor than other types. Anti conformer has least energy among all .

Now, this can be explained in below fashion.The human DNA conform has been called mutation in molecular genetics study.So the twisting moment force inside molecular structure causes ' shape drift ' in the molecular structure and this happens in high energy molecular chemistry which is involved in cryogenics and radioactive experiments in molecular chemistry