question_answer

Among the following, the species having square planar geometry for central atom are: (i) \[{{X}_{e}}{{F}_{4}}\]                (ii) \[S{{F}_{4}}\]                               (iii) \[{{[NiC{{l}_{4}}]}^{2-}}\]    (iv) \[{{[PtC{{l}_{4}}]}^{2-}}\]

A)  (i) and (iv)

B)                         (i) and (ii)           

C)         (ii) and (iii)     

D)         (iii) and (iv)

Correct Answer: A

Solution :

\[{{X}_{e}}{{F}_{4}}\] In ground state In excited state \[S{{F}_{4}}\]  is distorted trigonal bipyramidal structure \[{{[NiC{{l}_{4}}]}^{2-}}\]  \[s{{p}^{3}}\] hybridisation tetrahedral structure. \[{{[PtC{{l}_{4}}]}^{2-}}.\] It is square planar in structure.