CRYSTAL STRUCTURE of (5-METHYLCYCLOPENTADIENYL)-(1,5-CYCLOOCTADIENE) IRIDIUM(I)
K. V. Zherikova, N. B. Morozova, I. A. Baidina
Keywords: iridium(I), 1,5-cyclooctadiene, 5-methylcyclopentadiene, synthesis, X-ray diffraction analysis
Pages: 591-594
Abstract
XRD is used to determine the structure of Cp′Ir(cod) at a temperature of 150(2) K. Crystallographic data for C14H19Ir are: a = 10.8272(5) Å, b = 9.7746(4) Å, c = 10.9180(5) Å, β = 97.3310(10)°, monoclinic symmetry, space group P21/n, V = 1146.02(9) Å3, Z = 4, dcalc= 2.199 g/cm3, R = 0.0246. The structure is molecular, built of neutral molecules. The metal atom coordinates carbon atoms of two cyclic ligands:
5-methylcyclopentadienyl-ion (Cp′) and 1,5-cyclooctadiene (cod). Five Ir-CCp′ distances lie in the range of 2.21-2.28 Å; four Ir-Ccod distances differ insignificantly, and their average value is 2.114(13) Å. The С11С12С13С14С15 and C1C2C5C6 planes of ligand fragments are almost parallel, and the angle between normals is 1.9°. In the crystal, molecules are bonded only by van der Waals interactions; in the structure, the eight shortest Ir…Ir distances are in the range of 5.608-7.257 Å.
|
