Insights Into the Carbene-Initiated Aggregation of [Fe(cot)2]

Authors

  • Dr. Vincent Lavallo,

    1. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125 (USA)
    2. King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia), Fax: (+1) 626-564-9297
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  • Prof. Amer El-Batta,

    1. Department of Chemistry and KAUST Center in Development, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia)
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  • Prof. Guy Bertrand,

    1. UCR-CNRS Joint Research Chemistry Laboratory (UMI 2957), Department of Chemistry, University of California, Riverside, CA 92521-0403 (USA)
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  • Prof. Robert H. Grubbs

    Corresponding author
    1. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125 (USA)
    2. King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia), Fax: (+1) 626-564-9297
    • Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125 (USA)
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  • We gratefully acknowledge financial support from the NIH (grants 5R01 GM 31332 and R01 GM 68825, and N.R.S.A. fellowship for V.L. This publication was based on work supported by Award No. K-C1-019-12 made by King Abdullah University of Science and Technology (KAUST). The support of King Fahd University of Petroleum and Minerals (KFUPM) is also highly appreciated. We thank L. M. Henling and M. W. Day (California Institute of Technology) for X-ray crystallographic analysis. The Bruker KAPPA APEX II X-ray diffractometer was purchased via an NSF Chemistry Research Instrumentation and Facilities: Multi-User award to the California Institute of Technology, CHE-0639094.

Abstract

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Carbenes attack! Stable carbenes react with [Fe(cot)2] in very different ways. Whereas the classical N-heterocyclic carbenes induce the formation of tetra- and trimetallic iron clusters, abnormal NHCs and carbocyclic carbenes (BACs) form mono- and bimetallic iron complexes. Cyclic (alkyl)(amino)carbenes (CAACs) react with [Fe(cot)2] in a completely different manner, namely through outersphere [4+1] cycloaddition.

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