Give reason for the following : The molecule ofMgCl_(2)is linear while that of stannous chloride is angular.

Give reason for the following : The molecule ofMgCl_(2)is linear whil

1.	Give reason for the following : The molecule ofMgCl_(2)is linear while that of stannous chloride is angular.
Answer» Solution :E.C. of`""_(12)Mg ` is `1s^(2) 2S^(2) 2p^(6) 3s^(2)` in the ground state . Hence , in the excited state, it is `1s^(2) 2s^(2) 2p^(6) 3s^(1) 3p_(x)^(1)` . It undergoes sp-hybridisation. Therefore, the shape of `MgCl_(2)` is LINEAR . E.C. of Sn is `[KR] 5s^(2)5_(x)^(1) 5p_(y)^(1) `. It undergoes `sp^(2)`-hybridisation. The two half-filled hybrid orbitals form bonds with Cl-atoms while the third is occupied by a lone pair . Hence , `SnCl_(2) ` is BENT or V-shaped .