Abstract
The crystal structures of (η 5-C5H4COMe)M(CO)3Me (M=Mo,W) have been determined. They are not isostructural. M=Mo isP21/c,a=10.205(6),b=14.192(8),c=8.135(6) Å,β=93.43(4)° andD(calc)=1.71 g cm−3 forZ=4. M=WisP21/c,a=12.580(7),b=6.830(5),c=13.750(7) Å,β=93.72(4)° andD(calc)=2.20 g cm−3 forZ=4. Both have a four-legged piano stool geometry with the substituted carbon making the closest M-C(η 5) approach. The methyl group in the M=W derivative is disordered between twotrans-ligand positions. The average bonding parameters for the more accurately determined Mo analog are: Mo-C(η)5)=2.34(3) Å, Mo-CO=1.98(2) Å, Mo-Me=2.304(4) Å.
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Rogers, R.D., Atwood, J.L., Rausch, M.D. et al. Crystal structures of (η5-C5H4COMe)M(CO)3Me (M=Mo, W). Journal of Crystallographic and Spectroscopic Research 20, 555–560 (1990). https://doi.org/10.1007/BF01221897
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DOI: https://doi.org/10.1007/BF01221897