In which of the following cases enol content will be higher than the keto content in n-hexane?

In which of the following cases enol content will be higher than the k

1.	In which of the following cases enol content will be higher than the keto content in n-hexane?
Answer» `CH_(3)-overset(O)overset(\|\|)C-overset(O)overset(\|\|)C-CH_(3)` `H_(5)C_(2)O-overset(O)overset(\|\|)C-CH_(2)=overset(O)overset(\|\|)C-OC_(2)H_(5)` Solution :`CH_(3)-overset(O)overset(\|\|)C-underset(O)underset(\|\|)C-CH_(3)` less repulsion between two `overset(O)underset( C )(\|\|)` bonds More repulsion C - C BOND ROTATIONS not Possible and two `overset(O)underset( C )(\|\|)` are more stable than `overset(O)underset( C )(\|\|)` & C = C bond. Repulsions minimised and stabilized by H- bonding. dve methylene group is PRESENT in between two strong electron with drawing groups.