AIIMS2006ChemistryCoordination Compounds
Among the following, the species having square planar geometry for central atom are (i) XeF ₄ , (ii) SF ₄ , (iii) [ NiCl ₄ ]²⁻ , (iv) [ PdCl ₄ ]²⁻
Options
- A(i) and (iv)
- B(i) and (ii)
- C(ii) and (iii)
- D(iii) and (iv).
Correct answer
A. (i) and (iv)
Step-by-step solution
XeF ₄: s p^3 d^2 hybridisation, shape is square planar instead of octahedral due to presence of two lone pair of electrons on Xe atom. SF ₄: SF ₄ molecule shows s p^3 d hybridisation but its expected trigonal bipyramidal geometry gets distorted due to presence of a lone pair of electrons and it becomes distorted tetrahedral or see-saw with the bond angles equal to 89^ and 177^ instead of the expected angles of 90^ and 180^ respectively. Experiments have, however, shown that 4coordinated complexes of Pd (II) are dia