The number of geometric isomers possible for the complex $[\mathrm{CoL}_{2}\mathrm{Cl}_{2}]^{-}$ ($\mathrm{L}=\mathrm{H}_{2}\mathrm{NCH}_{2}\mathrm{CH}_{2}\mathrm{O}^{-}$) is

JEE Advanced · 2016 · 22 May 2016 · Paper 1 · Coordination Compounds

The number of geometric isomers possible for the complex

[CoL_{2} Cl_{2}]^{-}

(

L = H_{2} NCH_{2} CH_{2} O^{-}

) is

Answer: 5

Solution

L is a bidentate ligand (aminoethoxide) with N and O donor atoms. The complex

[CoL_{2} Cl_{2}]^{-}

is octahedral with Co(III). The two L ligands and two Cl ligands can be arranged in different geometric configurations. Considering cis/trans arrangements of the two Cl atoms and the orientations of the two chelating L ligands (with N and O in different positions), there are 5 distinct geometric isomers possible.

JEE Advanced · 2016 · 22 May 2016 · Paper 1 · Integer answer

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