Coordination CompoundHard
Question
Consider the following statements ;
(I) [Mn(H2O)4]SO4 is paramagnetic and square planar.
(II) Crystal field splitting energy (i.e. DO), in [Cr(H2O)6]3+ is higher than in [Cr(H2O)6]2+
(III) Wilkinson catalyst, a red-violet complex [RhCl(Ph3P)3] is diamagnetic and square planar.
(IV) Hg[Co(SCN)4], a deep blue complex is paramagnetic and tetrahedral.
and of these select the correct one from the given codes.
(I) [Mn(H2O)4]SO4 is paramagnetic and square planar.
(II) Crystal field splitting energy (i.e. DO), in [Cr(H2O)6]3+ is higher than in [Cr(H2O)6]2+
(III) Wilkinson catalyst, a red-violet complex [RhCl(Ph3P)3] is diamagnetic and square planar.
(IV) Hg[Co(SCN)4], a deep blue complex is paramagnetic and tetrahedral.
and of these select the correct one from the given codes.
Options
A.I and IV only
B.II, III and IV only
C.I, III and IV only
D.I, II, III and IV
Solution
All statements are correct
(I) High CFSE in low spin d5 configuratzion. It is reported square planar.
(II) ᐃO increases with increase in charge on central metal ion.
(III) 4d8 configuration has higher CFSE ; so dsp2 hybridisation and diamagnetic with red-violet colour.
(IV) SCN- is weak filed ligand ; so complex with 3d7 configuration is tetrahedral with three unpaired electrons.
(I) High CFSE in low spin d5 configuratzion. It is reported square planar.
(II) ᐃO increases with increase in charge on central metal ion.
(III) 4d8 configuration has higher CFSE ; so dsp2 hybridisation and diamagnetic with red-violet colour.
(IV) SCN- is weak filed ligand ; so complex with 3d7 configuration is tetrahedral with three unpaired electrons.
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