Solid-state and solution structural properties of copper(I) compounds withbidentate phosphane ligands

The copper(I) compounds [Cu(dppe)(2)]X [X = BF4-, I-; dppe = 1,2-bis(diphen ylphosphanyl) ethane], [Cu(dppp)(2)]X [X = BF4-, I-; dppp = 1,3-bis(dipheny lphosphanyl)propane], [Cu-2(dppe)(3)I-2], and [Cu-2(dppe)(2)I-2] have been prepared and their structural properties in solution and in the solid state have been determined. H-1-, C-13-, and P-31-NMR spectra in solution [varia ble temperature and anion (I-) concentrations] and analyses of solids (mass spectra, elemental analyses. and CPMAS P-31-NMR spectra) are interpreted w ith equilibria in solution that involve two mono- and two dinuclear species . The structures of [Cu(dppe)(2)]ClO4, [Cu(dppp)(2)]BF4, and [Cu-2(dppe)(3) I-2] . 2 CHCl3 have been analyzed by X-ray crystallography. In all three st ructures the copper(I) center adopts a distorted tetrahedral geometry.