Triatomic EP2 Triangles (E=Ge, Sn, Pb) as μ233-Bridging Ligands

Authors

  • Joshua S. Figueroa,

    1. Department of Chemistry, Massachusetts Institute of Technology, Room 2-227, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA, Fax: (+1) 617-258-5700
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  • Christopher C. Cummins Prof. Dr.

    1. Department of Chemistry, Massachusetts Institute of Technology, Room 2-227, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA, Fax: (+1) 617-258-5700
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  • We gratefully acknowledge the US National Science Foundation (CHE-0316823) for financial support, Dr. Peter Müller for assistance with the X-ray crystallographic studies, and Prof. Daniel G. Nocera for a generous gift of computer time.

Abstract

original image

Divalent Group 14 salts react with the [Na(thf)x]+ derivative of the terminal niobium phosphide anion [P[TRIPLE BOND]Nb{N(Np)Ar}3] (Np=neopentyl, Ar=3,5-Me2C6H3) to give complexes of the form [(μ233-cyclo-EP2){Nb[N(Np)Ar]3}2] (E=Ge, Sn, and Pb; see structure). The bridging {cyclo-EP2} units in these complexes can be considered as neutral 2π-electron three-membered rings that are isolobal to the cyclopropenium ion.

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