Reactions of a dinuclear copper(I) complex derived from a hexadentate ligand having N2As4 donor sites. Crystal structure of [Cu2(BDAE)(PPh3)2cl2]
摘要:
The reactions of a tri-coordinate dinuclear copper(I) complex of the composition [Cu2(BDAE)](ClO4)2 (Where BDAE = alpha,alpha'-bis{bis[2-(diphenylarsino)ethyl]amino}ethane) with some mono- and bidentate species having different donor atoms were studied. The reaction of the complex with anionic species such as LiCl, NaN3, NH4NCS and NaBH4 resulted in the formation of tetra-coordinate complexes of compositions [Cu2(BDAE)Cl2], [Cu2(BDAE)(N3)](ClO4), [Cu2(BDAE)(NCS)](ClO4) and [Cu2(BDAE)(BH4)2], respectively. The reactions of CS2 and thiourea gave the products [Cu2(BDAE)(CS2)2](ClO4)2 and [Cu2(BDAE)(H2NCSNH2)2](ClO2)2, respectively. The reactions of monodentate neutral molecules B (B = PPh3, AsPh3 and imidazole) yielded complexes of the composition [Cu2(BDAE)(B)2](ClO4)2. The reaction with pyridine in a 1:4 molar ratio gave a complex of composition [Cu2(BDAE)(C5H5N)4](ClO4)2. The bidentate ligands 1,2-bis(diphenylphosphino)methane/ethane (dppm/dppe) react with the complex to yield complexes of the composition [Cu2(BDAE)(dppm)](ClO4)2/[Cu2(BDAE)(dppe)](ClO4)2, in which dppm/dppe acts as a bridge between two metal centres. The reaction with bipyridine gave a tetra-coordinate complex of the composition [Cu2(BDAE)(C10H8N2)2](ClO4)2. The molecular structure of the complex [Cu2(BDAE)(PPh3)2Cl2] was established by single-crystal X-ray diffraction. The cyclic voltammetric behaviour of all of these complexes was investigated.