Typical for platinum(IV) complexes, [Pt(NH)] is diamagnetic and kinetically inert, e.g. unaffected by strong acids. The cation obeys the 18-electron rule. It is prepared by treatment of methylamine complex [Pt(NHCH)Cl]Cl with ammonia.
The complex [Pt(NH)] is a rare example of a tetracationic ammine complex. Its conjugate bases [Pt(NH)NH] and [Pt(NH)(NH)] have been characterized.