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https://hdl.handle.net/2440/4343
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Type: | Journal article |
Title: | Temperature dependence of the crystal structure of Ru4(m4-C2H2)(CO)9(h-PhMe) |
Author: | Bruce, M. Skelton, B. White, A. Zaitseva, N. |
Citation: | Australian Journal of Chemistry: an international journal for chemical science, 1999; 52(7):681-684 |
Publisher: | CSIRO Publishing |
Issue Date: | 1999 |
ISSN: | 0004-9425 |
Statement of Responsibility: | Michael I. Bruce, Brian W. Skelton, Allan H. White and Natasha N. Zaitseva |
Abstract: | The thermal reaction between Ru4(µ4-C2H2)(CO)12 and toluene afforded Ru4(µ4-C2H2)(CO)9(η-PhMe), whose crystal and molecular structures, determined at c. 300 and 153 K, are reported [triclinic, P 1; a ≈ 8 . 0; b ≈ 10 . 4; c ≈ 13 . 7 Å, a ≈ 87; b ≈ 89 . 7; γ ≈ 70°, Z = 2; conventional R values on |F| at convergence were 0 . 027 (300 K), 0 . 020 (153 K) for 4561, 4761 independent ‘observed’ [F >4σ(F)] reflections, respectively]. At low temperature, the structure is a nicely ordered Ru4 butterfly with a C2H2 ligand sitting between the wing tips and an η6 -PhMe ligand attached to one of the wing-tip atoms along the extension of the axis between them. At 300 K, a disordered component is evident, 9% occupancy of the wing-tip atom appended to toluene being displaced by 0 . 701(8) Å so that the bonding to the toluene approaches η2; this is accompanied by a counterpart displacement of one of the hinge Ru atoms. It is suggested that this is the first stage of a putative migration of the arene from wing-tip to hinge Ru atoms. |
Description: | © CSIRO 1999 |
DOI: | 10.1071/CH99035 |
Published version: | http://dx.doi.org/10.1071/ch99035 |
Appears in Collections: | Aurora harvest 2 Chemistry publications |
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