How many of the following complexes are correctly matched with given properties ? (a)[Ni(NH_3)_6]^(2+)-Octahedral outer orbital complex and two unpaired electrons. (b)[Cr (NH_3)_6]^(3+)-Octahedral inner orbital complex and one unpaired electron. ( c)[Zn(NH_3)_6]^(2+)-Octahedral outer orbital complex and diamagnetic. (d)[Pt (NH_(3))_4]^(2+)-Square planar and diamagnetic (e)[Co (SCN)_4]^(2-)-Tetrahedral and three unpaired electrons. (f)[NiBr_2(PPh_3)_2]-Square planar and diamagnetic.

How many of the following complexes are correctly matched with given p

1.	How many of the following complexes are correctly matched with given properties ? (a)[Ni(NH_3)_6]^(2+)-Octahedral outer orbital complex and two unpaired electrons. (b)[Cr (NH_3)_6]^(3+)-Octahedral inner orbital complex and one unpaired electron. ( c)[Zn(NH_3)_6]^(2+)-Octahedral outer orbital complex and diamagnetic. (d)[Pt (NH_(3))_4]^(2+)-Square planar and diamagnetic (e)[Co (SCN)_4]^(2-)-Tetrahedral and three unpaired electrons. (f)[NiBr_2(PPh_3)_2]-Square planar and diamagnetic.
Answer» SOLUTION : All electrons are paired , so complex ion is diamagnetic (d)`._78 Pt (II)` has `5d^8` configuration , square planar and all electrons are paired , so diamagnetic (e)`._27Co^(2+)` has `3d^7` configuration, `SCN^-` is weak field ligand So the complex is tetrahedral and paramagnentic with THREE unpaired electrons. (F)`._25 NI^(2+)` has `3d^5` configuration , tetrahedral and two unpaired electrons.