Synthesis and characterization of a mercury-containing metalloborylene

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Berterman, Rüdiger ; Braunschweig, Holger ; Ewing, William C ; Kramer, Thomas ; Phukan, Ashwini K ; Vargas, Alfredo ; Werner, Christine (2014)

The reaction of phenylmercuric chloride with an anionic dimanganaborylene [Cp2(CO)4Mn2B]Na led to the formation and isolation of a trimetalloborylene featuring at previously unreported bond between mercury and a single boron atom. Examination by 199Hg NMR displayed a small 11B-199Hg scalar coupling (J = 103 Hz), confirming the electronic interaction of the two atoms. The use of ETS-NOCV analysis indicated the nature of bonding to be σ-donation from a B-Mn π-orbital to Hg, in conjunction with weak Hgd→π* back-donation.
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