Characterisation of tridentate macrocyclic complexes of molybdenum(0) with tetra-aza macrocycles; crystal structure of [Mo(CO)3(tet a)](tet a= C-meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetra-azacyclotetradecane)

Abstract

The tetra-aza macrocyclic ligands tet a(C-meso)(1) and tet b(C-racemic)(2)(tet = 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetra-azacyclotet-radecane), react with molybdenum hexacarbonyl in dry dimethylformamide to yield [Mo(CO)₃(tet a)](3) and [Mo(CO)₃(tet b)](4), respectively, in which the potentially tetradentate ligands are tridentate; the [Mo(CO)₃(tet a)] complex has been characterised by X-ray crystallography.