In both water and dJmethyl ether (CH_(3) - underset(..)overset(..)(O) - CH_(3)) , oxygen atom is central atom, and has the same hybridization, yet they have different bond angles. Which one has greater bond angle ? Give reason.

In both water and dJmethyl ether (CH_(3) - underset(..)overset(..)(O)

1.	In both water and dJmethyl ether (CH_(3) - underset(..)overset(..)(O) - CH_(3)) , oxygen atom is central atom, and has the same hybridization, yet they have different bond angles. Which one has greater bond angle ? Give reason.
Answer» SOLUTION :DIMETHYL ether has greater bond angle than that of water, however in both the molecules central atom oxygen is `sp^(3)` hybridised with two lone PAIRS. In dimethyl ether, bond angle is greater `(111.7^(@))` due to the greater repulsive interaction between the two bulky alkyl (methyl) groups than that between two H-atoms. The C of `CH_(3)` group is attached to THREE H-atoms through o-bonds and three C-H bond pair of electrons increases the ELECTRONIC charge density on carbon atom.