The crystal structure and optics of trans-bis((4-(phenylethynyl)phenyl)ethynyl)bis(tributylphosphine)-platinum(II):: trans-[(nBu3P)2Pt(CCC6H4CCC6H5)2]

The crystal and molecular structure of trans-bis((4-(phenylethynyl) phenyl)ethynyl)bis(tributylphosphine) platinum(II), trans-[(nBu(3)P)(2)Pt(C=CC6H4C=CC6H5)(2)], C56H72P2Pt, has been determined at room temperature. The pale-yellow crystals are triclinic, space group PI with unit cell dimensions a = 10.884(2) Angstrom, b = 12.979(3) Angstrom, c = 10.083(2) Angstrom, alpha = 109.75(2)degrees, beta = 95.17(2)degrees, gamma = 101.94(2)degrees, Z = 1 and D-x = 1.288 Mg m(-3). The structure was refined by a full-matrix least-squares procedure on F to final R = 0.036 using 3828 reflections with I greater than or equal to 1.0 sigma(I). The Pt atom in the centrosymmetric structure forms Pt-P and Pt-C distances of 2.304(1) Angstrom and 1.981(6) Angstrom, respectively. The optical properties of the title complex were also determined, i.e. alpha, beta, and gamma are 1.531, 1.615 and 1.947, respectively.