Crystal structure of catena-poly[(μ-2-aminopyrimidine-N,N′)bis(μ-chloro)- bis(triphenylphosphine)dicopper(I)], Cu2Cl2[P(C6H5)3]2(C4H5N3)

Abstract

Source of materialSynthesis of the title compound was carried out by stirring the solution of CuCl (0.099 g, 1 mmol), PPh 3 (triphenylphosphine, 0.26 g, 1 mmol), and C 4H5N3 (2-aminopyrimidine, 0.10 g, 1 mmol) in methylene dichloride (20 ml) for six hours at room temperature. After filtration, the filtrate was allowed to stand at room temperature. Slow evaporation of the solvent yielded yellow crystals. DiscussionThe 2 [5] were prepared. Here, we report another copper(I) complex with 2-AMP, [Cu2Cl2(PPh3)2(C4H5N3)]¥. The crystal structure of the title compound is built of one-dimensional chains, which are formed by two crystallographically independent [Cu2Cl2(PPh3)2(C4H5N3)] dimer units bridged by each two N atoms from the pyrimidine rings of 2-AMP. In the unit, the four-coordinated Cu atom is in the center of the distorted tetrahedron. Each Cu atom is coordinated to one P atom from PPh3, two Cl atoms and one N atom from the pyrimidine ring. Just as the other reported Cu I and Ag I compounds, the Cu 2 Cl 2 ring in the title compound is also a plane. In the plane, the average distance d(Cu···Cu) is 3.0259 Å and d(CuCl) is 2.4175 Å, whereas d(Cu···Cu) is 3.0275 Å and d(CuI) is 2.5375 Å for [3]. The average d(CuN) of 2.077 Å) in the title structure is slightly longer than the value of 1.960 Å for [3]. The mean CuClCu bond angle (77.48°) is slightly larger than the CuICu angle (73.41°), while the mean ClCuCl angle (102.58°) is slightly smaller than the ICuI angle (106.6°) [3]. In addition, the previously reported (PPh3)2Cu2(m-Cl)2(m-4,4-bipyridine) [6] has an analogous Cu2Cl2 plane. In the plane, the d(Cu···Cu) of 2.997(1) Å and average distances d(CuCl) of 2.416 Å are slightly smaller than the corresponding values of the title structure. Accordingly, the CuN bond distance of 2.057(3) Å is also smaller than that in the present study.

Crystal structure of bis($2-chloro)-tris(triphenylphosphine)dicopper(I) dimethylformamide solvate, Cu2Cl2[P(C6H5)3]3 ·C3H7NO

“…The structures of the copper(I) complexes are formed by coordinating phosphine or bulky nitrogen base ligands to CuX. These complexes are polynuclear copper(I) species with m 2-, m3-orm4-bridging Xatoms, and their structures are affected by the ligand and method of preparation [1][2][3][4][5].…”