How many isomers are possible for [Cr(NO_2)(NH_3)_5]Cl_2[Cr(NO2)(NH3)5]Cl2?

1 Answer
anor277
Dec 16, 2016

A couple, but there is of course a catch.......

Explanation:

For the complex ion [Cr(NO_2)(NH_3)_5]^(2+)[Cr(NO2)(NH3)5]2+, only the one isomer would be available but for the ambident nature of the ligand, NO_2^-NO−2.

"Nitro-nitrito"Nitro-nitrito isomerism can occur, depending on whether the ligand is "N-bound, nitro"N-bound, nitro or "O-bound, nitrito"O-bound, nitrito; and thus 2 isomers are possible. The NO_2^-NO−2 ligand can also bind in a chelate fashion, but I doubt it is doing so in a co-ordinatively saturated Cr(III+)Cr(III+) complex.

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