Crystal structure of two dimensional polymeric poly[bis(μ3-chloro)-(μ2-2- aminopyrimidine-κ2N,N')-dicopper(I)], C8H10Cl4Cu4N6

Abstract

Source of materialThe title complex was synthesized from a mixture of CuCl (0.297 g, 3.0 mmol), fumaric acid (0.116 g, 1.0 mmol), 2-amino-pyrimidine (0.095 g, 1 mmol) and ethanol (1.0 mL), which was sealed under vacuum in a Pyrex tube and heated to 140°C for 3 days, followed by cooling to room temperature at 20°C/h. The solid products were recovered by vacuum filtration and washed with distilled water. Light brown, thin, rod-shaped crystals suitable for X-ray diffraction analysis were obtained with unidentified blue and green powder. The product was stable in air. The yield of the compound was about 32% based on copper. DiscussionCopper halide complexes adopt a wide variety of stoichiometries in the formation of neutral and anionic oligomers or polymers.Numerous structural motifs such as rhomboid Cu 2 X 2 dimers, cubane Cu 4 X 4 tetramers, double-stranded [CuX] n ladders, and several types of chains are found in copper halide complexes [1][2][3][4][5][6][7][8][9][10]. Double-stranded ladders are one of the important building units in constructing coordination complexes with other organic ligands [6][7][8][9][10]. The title structure is an isotype to the corresponding bromide [11]. The crystal structure of the title compound is built of two-dimensional layers. One crystallographically distinct copper atom is coordinated by three chlorine atoms and one nitrogen atom from a 2-aminopyridmidine group to form the distorted tetrahedral geometry that has a Cu-N distance of 2.003(2) Å and Cu-Cl distances in the range of 2.3175 (9)