At room temperature, the reducing reaction between the bis(diphenylphosphino)butane (dppb) ligand and the compound (tfac=2-thenoyltrifluoroacetone) gave luminescent copper complex [Cu(dppb)(tfac)]2. They have been characterized by physicochemical and spectroscopic methods. Crystal structure of the title complex shows that 2-thenoyltrifluoroacetone behaves as chelating ligand and dppb coordinates as bridging bidentate ligand to Cu atoms in the newly prepared copper complex. The crystal is monoclinic, space group P21/n, with cell parameters a = 1.031 0(2) nm, b = 1.873 0(4) nm, c = 1.763 0(4) nm, β = 95.10(3)°, Z = 4, V = 3.391 0(12) nm3, R = 0.060 3, wR = 0.143 4. CCDC: 228393.
A binuclear copper(I) complex [Cu2(dppm)2(C7H6N2)2](NO3)2 (C7H6N2 = benzimi- dazole, dppm = Ph2PCH2PPh2) has been synthesized and characterized by X-ray crystallography. The crystal belongs to monoclinic, space group C2/c with a = 14.167(3), b = 21.209(4), c = 20.680(4) ?, β = 103.93(3)o, C32H28CuN3O3P2, Mr = 628.05, Z = 8, μ = 0.868 mm-1, V = 6031(2) ?3, F(000) = 2592, Dc = 1.383 g/cm3, R = 0.0593 and wR = 0.1736. A total of 5297 independent reflec- tions were collected, of which 3503 were observed with I > 2σ(I). The central copper atom is tri-coordinated by phosphorus atoms from bridging dppm and nitrogen atom from benzimidazole. In the coordination sphere, the bond lengths of Cu–P(1) and Cu–P(2) are 2.2607(17) and 2.2503(16) ?, respectively and the P–Cu–P bond angle is 127.26(6)o.
KANG Bei-ShengZHAO DongGUO Li-BingZHENG XinSUN Yu-An
At room temperature, dibenzoyl peroxide undergoes oxidative addition reaction with metallic copper powder and 4 dimethylamine pyridine which affords the last products as binuclear copper?complex (1), [Cu(C6H5COO)2(C7H10N2)]2. This complex is further characterized by spectroscopic methods. The structure of complex (1) has been determined by a single crystal X ray analysis. Crystallographic data are as follows: monoclinic, space group P21/n, a=10.446(2)?, b=11.140(5)?, c=17.179(3)?, β=95.92(3)°, V=1988.4(7)?3, Z=4, F(000)=884, μ=11.27cm-1, D(calcd.)=1.429g·cm-3, R=0.0399, Rw=0.1202. Each copper?ion is coordinated by two bridging bidentate benzoate and 4 dimethylamine pyridine to form dimeric molecule. CCDC: 188744.
