Synthesis and crystal structure of dinuclear copper(I) Cu2I2(PPh3)(3) center dot DMF

From the reaction of a mixture of CuI and PPh3 in dichloromethane with W2S4 [S2CN(CH2CH2OH2)(2)](2) in N,N-dimethyformamide, the compound Cu2I2(PPh3)( 3). DMF was isolated unexpectedly. The crystal structure consists of dinucl ear copper(I) compound and DMF solvent. Two copper atoms show an asymmetric al coordination geometry. DMF lies near three-coordinated copper atom with the closest nonbonded contacts between oxygen atom of DMF and the pheny rin g carbon atoms at a distance of 3.32(2)similar to 3.44(2) Angstrom. The pre sence of DMF may have a significant influence on the structure of the dinuc lear copper complex and the molecular packing. Crystal data: C57H52Cu2I2NOP 3, M-r=1240.87, monoclinic, space group P2(1)/c, unit cell parameters: a=15 .863(3), b=19.619(7), c=18.232(4) Angstrom, beta=109.53(2)degrees, V=5348(3 ) Angstrom(3), Z=4, D-c=1.54 g/cm(3), mu(Mo-K alpha)=20.66 cm(-1), F(000)=2 472, for 5954 observed reflections with I>3 sigma(I), final R=0.046, R-w=0. 069.