Complex compound with coordination number two and +1 oxidation state of central metal cation can exhibit :

a $\to$ Cationic monodentate ligand
b $\to$ Neilti{l mondentate ligand
c, e $\to$ Anionic monodentate ligand
d $\to$ Ambihentate anionic ligand
lMac]e shows ionization isomerism
${\left[{\mathrm{Md}}_2\right]}^{-}$ shows linkage isomerism
$\left[\mathrm{M}\left({\mathrm{H}}_2\mathrm{O}\right)\mathrm{a}\right]{\mathrm{c}}_2\text{ and }\left[\mathrm{Mac}\right]\mathrm{c}\cdot {\mathrm{H}}_2\mathrm{O}\text{ will show hydrate isomerism. }$