Which of the following compound is square planar
(A) `[MnBr_(4)]^(-2)`
(B) `[CoCl_(4)]^(-2)`
(C) `[Ni(CO)_(4)]`
(D) `[Ni(CN)_(4)]^(-2)`

Ni(CO)_(4) is

EAN of Ni(CO)_(4)

Square planar complexes are formed by d^(8) ions with strong field ligands The crystal field splitting Delta_(0) is larger for the second and theird row transition elements and for more highly charged species All the complexes having 4d^(8) and 5d^(8) configurations are mostly square planar including those with weak field ligands such as halide ions square planar complexes can show geometrical isomerism but they do not show optical isomerism due to the presence of plane of symmetry Among the following complexes which has a square planar geometry? (a) [RhCl(CO)(PPh_(3))_(2)] (b) K_(3)[Cu(CN)_(4)] (c ) [Ni(CO)_(4)] (d) K_(2)[Zn(CN)_(4)] .

Predict the hybridisation and geometry of the following complexes. (a) [Fe(CN)_(6)]^(3-) " " (b)[MnBr_(4)]^(2-)" " (c ) [Fe(H_(2)O)_(6)]^(2+)" " (d) [Co(SCN)_(4)]^(2-)

There are four complexes of Ni. Select the complexes/es which will be attracted by magnetic field : (I) [Ni(CN)_(4)]^(2-) (II) [NiCl_(4)]^(2-) (III) [Ni(CO)_(4)] (IV) [Ni(NH_(3))_(6)]^(2+)

Amongst Ni(CO)_(4),[Ni(CN)_(4)]^(2-) and [NiCl_(4)]^(2-)

Correct order of magnetic moment (spin only) for the following complexes (a) [Pd(PPh_(3))_(2)Cl_(2)] (b) [Ni(CO)_(4)] (c) [Ni(CN)_(4)]^(2-) (d) [Ni(H_(2)O)_(6)]^(2+)

Calculate the effective atomic number of the metal atoms in the following complexes / complex ions. (A) [Cr(CO)_(6)]" "(b)[Fe(CN)_(6)]^(3-) " " (c )[Co(CN)_(6)]^(4-)" " [Ni(NH_(3))_(6)]^(2+) [Cr=24,Fe=26,Co=27 and Ni=28 as atomic numbers]

The paramagnetic and tetrahedral complexes among the following are -a-[NiCl_4]^(2-) , b-[CuCl_4]^(2-) , c-[Ni(CO)_4] , d-[Ni(CN)_4]^(2-)

Give the IUPAC names of the following compound K_4[Ni(CN)_4]