Synthesis, structure and spectroscopic properties of [Cu-3(mu-dpnapy)(3)(CH3CN)][ClO4](3)center dot CH3CN (dpnapy = 7-diphenylphosphino-2,4-dimethyl-1,8-naphthyridine) with a linear copper atom array

摘要

The co-ordination chemistry of 7-diphenylphosphino-2,4-dimethyl-1,8-naphthyridine (dpnapy) with Cu-I has been examined. Reaction of [Cu(CH3CN)(4)][ClO4] with dpnapy in CH3CN afforded [Cu-3(mu-dpnapy)(3)(CH3CN)][ClO4](3) 1[ClO4](3). The crystal structure of 1[ClO4](3). CH3CN reveals a linear Cu-Cu-Cu array with both trigonal and tetrahedral co-ordination modes for the copper atoms. The intramolecular Cu-Cu distances of 2.449(2) and 2.721(2) Angstrom suggest that only two of the copper atoms have a bonding interaction. Complex 1 reacts with triphenylphosphine (PPh3) and 2,2'-bipyridine (bpy) to give [Cu(bpy)(dpnapy)(2)][ClO4] 2[ClO4] and [Cu-2(mu-dpnapy)(3)][ClO4](2) 3[ClO4](2), respectively. Spectroscopic properties of the complexes have been examined. [References: 21]