,$[M \,(AB)\, (CD) \,ef]^{n\,±}$ (જ્યાં $AB,\,CD-$ અસમમિતીય દ્વિદંતીય લિગાન્ડ્, $e$, $f-$ એકદંતીય લિગાન્ડ્)
$(I)\, [CrCl_2(NO_2)_2(NH_3)_2]^-$ $(II)\, [Co(NO_2)_3(NH_3)_3]$
$(III)\, [PtCl(NO_2)(NH_3 )(py)]$ $(IV)\, [PtBrCl(en)]$
$(I)\,\,\,-\,\,\,(II)\,\,\,-\,\,\,(III)\,\,\,-\,\,\,(IV)$