Copper(I) complexes with the triarylphosphanes PPhn(C6H4CH2NMe2-2)3−n (n = 0–2) and PPh2[C6H4CH2N(CH2CH2)2O-2]. Synthesis and structural characterization

Several copper(I) complexes of type [CuXPPhn(C6H4CH2NMe2-2)3−n] [X = Cl, n = 1 (2), 2 (3); X = I, n = 0 (4), 1 (5), 2 (6)] were prepared by reacting CuX with the appropriate triarylphosphane in a 1:1 molar ratio. The ionic species [Cu(MeCN)2PPh2{C6H4CH2N(CH2CH2)2O-2}]+PF6− (7) was obtained in the reaction between [Cu(MeCN)4]PF6 and PPh2{C6H4CH2N(CH2CH2)2O-2} (1). All compounds were characterized by NMR spectroscopy (1H and 31P) and mass spectrometry. For compound 7 the 19F NMR spectrum was also recorded. Single-crystal X-ray diffraction studies put in evidence a P,N monometallic biconnective coordination behavior of the ligand in compounds 3, 6·0.5CH2Cl2 and 7·CH2Cl2, while in compound 4 a P,N,N monometallic triconnective behavior was observed. In species 2 the unit cell contains two independent molecules; in one of them the PN2 ligand behaves P,N,N-monometallic triconnective, while in the other as a P,N-monometallic biconnective moiety. The N→Cu intramolecular coordination induces planar chirality to the metal center and, as a consequence, the crystal contains both R and S isomers.

Copper(I) complexes of type [CuXPPhn(C6H4CH2NMe2-2)3−n] [X = Cl, I; n = 0–2] and the ionic species [Cu(MeCN)2PPh2{C6H4CH2N(CH2CH2)2O-2}]+PF6− and the starting phosphane PPh2{C6H4CH2N(CH2CH2)2O-2} are described. Single-crystal X-ray diffraction studies evidenced either a P,N- or a P,N,N-coordination pattern of the PN1–3 ligands.Figure optionsDownload as PowerPoint slide