
Synthesis and crystal structures of dimetal tetramethyltetraazaannulene compounds of Rh(I) and Ir(I, II): [(tmtaa)Rh2(COD)2], [(tmtaa)Ir2(CO)4], and [(tmtaa)Ir2(CO)4I2]
Keywords: Macrocycle; Dirhodium; Diiridium; Geometrical changes; Oxidative addition;