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Crystal and molecular structure of octacarbonyl[bis(bispentafluorophenylarsenido)] dimolybdenum, Mo2(CO)8[μ-As(C6F5)2]2

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Abstract

The X-ray crystallographic structure determination of Mo2(CO)8[μ-As(C6F5)2]2 reveals that the compound crystallizes in the tetragonal space groupP421 c witha=14.915(3),c=16.732(3) Å,V=3722(1) Å3, andZ=4. Least-squares refinement based on 1474 independent observed data [(F obs)≥3σ(F obs)] resulted in a finalR value of 0.038. The Mo-Mo distance of 3.132(1) Å is longer than found in analogous phosphido-bridged molybdenum systems. The central Mo2As2 rhombus is nearly flat and the coordination geometry of the Mo atoms is essentially octahedral. An unusual staggering of the Mo(CO)4 groups by 15.8° and short intramolecular C6F5⋯CO contacts support the presence of a strong steric interaction between the Mo(CO)4 and As(C6F5)2 groups.

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Authors and Affiliations

  1. Department of Chemistry, University of Delaware, 19716, Newark, Delaware

    Arnold L. Rheingold, Mark E. Fountain & James R. Harper

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  1. Arnold L. Rheingold
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  2. Mark E. Fountain
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  3. James R. Harper
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Rheingold, A.L., Fountain, M.E. & Harper, J.R. Crystal and molecular structure of octacarbonyl[bis(bispentafluorophenylarsenido)] dimolybdenum, Mo2(CO)8[μ-As(C6F5)2]2 . Journal of Crystallographic and Spectroscopic Research 17, 121–126 (1987). https://doi.org/10.1007/BF01181965

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  • DOI: https://doi.org/10.1007/BF01181965

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