$1.$ $[Co(NH_3)_5NO_2]Cl_2$ અને $[Co(NH_3)_5ONO]Cl_2$ $-$ બંધનીય
$2.$ $[Cu(NH_3)_4] [PtCl_4]$ અને $[Pt(NH_3)_4] [CuCl_4]$ $-$ સવર્ગ
$3.$ $[Pt(NH_3)_4Cl_2]Br_2$ અને $[Pt(NH_3)_4Br_2]Cl_2$ $-$ આયનીકારક
$(i)$ $[Ni(CO)_4], \,sp^3$
$(ii)$ $[Ni(CN)_4]^{2-}, \,sp^3$
$(iii)$ $[CoF_6]^{3-}, \,d^2sp^3$
$(iv)$ $[Fe(CN)_6]^{3-}, \,sp^3d^2$
$(I)\, [(Ph_3P)_2PdCl_2PdCl_2]$ $(II)\,[NiBrCl(en)]$
$(III)\, Na_4 [Fe(CN)_5 NOS]$ $(IV)\, Cr(CO)_3(NO)_2$
$(I)\,-\,(II)\,-\,,(III)\,-\,(IV)$