Carbon compounds of the transition metals. Part XIX. Crystal and molecular structure of µ-(π,π-1,6-dihydroheptalene)-bis(tricarbonylmolybdenum)
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1286-1292
- https://doi.org/10.1039/j19690001286
Abstract
The crystal structure of µ-(π,π-1,6-dihydroheptalene)-bis(tricarbonylmolybdenum) has been elucidated by single-crystal X-ray analysis. The crystals are orthorhombic: a= 10·83, b= 12·25, c= 13·07 Å, Z= 4, space group P212121(D2 4). The molecule comprises two Mo(CO)3 fragments bonded together and bridged by a 1,6-dihydroheptalene molecule; the Mo–Mo distance is 3·19 Å. The Mo(CO)3 fragments adopt a cis-configuration with respect to the organic ligand and the molecule possesses idealised two-fold symmetry with the two-fold axis passing through the mid-point of the C–C bond common to the two fused seven-membered carbon rings in the ligand, and bisecting the Mo–Mo bond. Within the Mo(CO)3 fragments the mean Mo–C and C–O bond-lengths are 1·99 and 1·14 Å respectively.Keywords
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