Dinuclear [Cu-2(NN)(PP)(2)][PF6](2) complexes containing bridging 2,3,5,6-tetra(pyridin-2-yl)pyrazine or 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine ligands

作者：Keller Sarah; Prescimone Alessandro; Constable Edwin C; Housecroft Catherine E^*

来源：Polyhedron, 2016, 116: 3-11.

DOI：10.1016/j.poly.2016.01.033

• Copper
• N-Heterocyclic ligands
• Bisphosphanes
• Heteroleptic complexes
• X-ray structure

The dinuclear copper(I) complexes [Cu-2(1)(POP)(2)][PF6](2), [Cu-2(2)(POP)(2)][PF6](2), [Cu-2(1)(xantPhos)(2)][PF6](2) and [Cu-2(2)(xantphos)(2)][PF6](2) containing bridging 2,3,5,6-tetra(pyridin-2-yl)pyrazine (1) or 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine (2) ligands and the P boolean AND P ligands bis(2-(diphenylphosphino)phenyl)ether (POP) or 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (xantphos) are presented. The single crystal structures of [Cu-2(1)(POP)(2)][PF6](2) and [Cu-2(2)(POP)(2)][PF6](2) confirm that both 1 and 2 act as bis(bidentate) ligands, bridging between two copper(I) centres; in [Cu-2(1)(POP)(2)][PF6](2), two pyridine rings are non coordinating, and in [Cu-2(2)(POP)(2)][PF6](2), there is one non-coordinating pyridine. In solution and on the NMR timescale at 295 K, the four pyridine rings in coordinated 1 are equivalent; similarly, the three pyridine donors in the [Cu-2(2)(POP)(2)][PF6](2) complexes are equivalent. The dynamic behaviour of [Cu-2(2) (POP)(2)][PF6](2) and [Cu-2(2)(xantphos)(2)][PF6](2) are investigated using variable temperature H-1 NMR spectroscopy. The photophysical properties of the complexes are discussed.

• 出版日期2016-9-25