Synthesis and structure of cyclohexyltriphenylphosphonium dicyanoaurate
Keywords:
cyclohexyltriphenylphosphonium dibromodicyanoaurate, synthesis, structure, X-ray diffraction analysisAbstract
A crystalline product was isolated from the products of a reaction mixture containing cyclohexyltri-phenylphosphonium dibromodicyanoaurate, zinc(II) acetate, and ethylenediamine. Its structure was characterized by X-ray diffraction (XRD) and IR spectroscopy as cyclohexyltriphenylphosphonium dicyanoaurate [Ph3P(C6H11-cyclo)][Au(CN)2] (1). According to X-ray diffraction data [C26H26N2PAu, M = 594.43; monoclinic syngony, symmetry group C2/c; cell parameters: a = 17.4790(6), b = 7.5335(2), c = 19.0122(6) Å; = 90.00, β = 111.138(4), = 90.00; V = 2335.04(14) Å3, Z = 4, calc = 1.691 g/cm3, = 6.384 mm1, F(000) = 1160, data collection range for θ: 2.71728.498; crystal size 0.499×0.312×0.188 mm; reflection index intervals: –23 ≤ h ≤ 23, –10 ≤ k ≤ 10, –25 ≤ l ≤ 25; total reflections 39511; independent reflections 2940; Rint = 0.0596; GOOF = 1.099; R1 = 0.0352, wR2 = 0.0777; residual electron density 1.206 / –2.865 e/Å3], complex 1 has an ionic structure and consists of linear dicyanoaurate anions and cyclohexyltriphenylphosphonium cations. In cyclohexyltri-phenylphosphonium cations, the phosphorus atoms have a tetrahedral coordination and are surround-ed by three phenyl and one cyclohexyl substituents. The CPC angles are 107.7(3)°–112.7(8)°, the P–C distances vary in the range of 1.77(2)–1.84(2) Å. The CAuC angle and the Au–C distances in the ani-on are 180.0(4)° and 1.974(8) Å, respectively. Complete tables of atomic coordinates, bond lengths and bond angles for the structures have been deposited with the Cambridge Crystallographic Data Centre (CCDC No. 2541602; deposit@ccdc.cam.ac.uk; http://www.ccdc.cam.ac.uk).References
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