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

Abstract Several copper(I) complexes of type [CuXPPh n (C 6 H 4 CH 2 NMe 2 -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) 2 PPh 2 {C 6 H 4 CH 2 N(CH 2 CH 2 ) 2 O-2}] + PF 6 − ( 7 ) was obtained in the reaction between [Cu(MeCN) 4 ]PF 6 and PPh 2 {C 6 H 4 CH 2 N(CH 2 CH 2 ) 2 O-2} ( 1 ). All compounds were characterized by NMR spectroscopy ( 1 H and 31 P) and mass spectrometry. For compound 7 the 19 F 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 ·0.5CH 2 Cl 2 and 7 ·CH 2 Cl 2 , 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 PN 2 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.