NO+, NO, NO−! Nitrosyl siblings from [IrCl5(NO)]−

► The highly reactive pentachloronitrosyliridate(III) and related NO species. ► The whole NO family of [IrCl5(NO)]−: NO+, NO and HNO/NO−. ► The whole NO family forms of [IrCl5(NO)]−. ► [IrCl5(NO)]− and NO related species.