Coordination CompoundHardBloom L3

Question

Which of the following is correctly matched?

Options

A.[Cr(CO)6] Paramagnetic Octahedral, sp3d2
B.[Fe(CO)5] Paramagnetic Trigonal bipyramid, sp3d
C.[Co(CO)4]– diamagnetic tetrahedral, sp3
D.[Ni(CO)4] diamagnetic spuare planar, dsp2

Solution

Sol. [Co(CO)4]–

Co– = 4s2 3d8 ⇒ CO is S.F.L. ⇒ electron pair of 4s orbital transfer into 3d orbital

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