Copper(I) and copper(II) complexes of polydentate phosphinoamines

Bidentate {PN} and tetradentate (P2N2) ligands stabilize copper(I) and copper(II) inside tetrahedral (CuI) and square planar (CuII) coordination spheres, to give [Cu(PN)2] +,2+ and [Cu(P2N2)] +,2+ complexes, which were characterized by various spectroscopies. The crystal structure of [Cu(H2dppd)]BF4·MeCN (H2dppd = N,N?-bis[2-(diphenylphosphino)phenyl]-propane-1,3-diamine) was determined: monoclinic, space group P21/n, Z=4, a = 11.483(4), b = 13.516(6), c = 24.224(9) Å, ? = 97.53(3)°, R = 0.064 using 1897 observed reflections; Cu-P(1) 2.205(5), Cu-P(2) 2.213(4), Cu-N(1) 2.16(1), Cu-N(2) 2.14(1) Å; P(1)-Cu-P(2) 125.1(2)°, N(1)-Cu-N(2) 95.9(4)°, P(1)-Cu-N(1) 87.4(3)°, P(2)-Cu-N(2) 87.8(3)°.