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Synthesis, Structure, and Bonding of Novel Homodinuclear Cobalt and Nickel Borylene Complexes
Author(s) -
Braunschweig Holger,
Christ Bastian,
CollingHendelkens Miriam,
Forster Melanie,
Götz Kathrin,
Kaupp Martin,
Radacki Krzysztof,
Seeler Fabian
Publication year - 2009
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200900679
Subject(s) - nickel , chemistry , cobalt , borane , crystallography , metal , topology (electrical circuits) , stereochemistry , inorganic chemistry , organic chemistry , catalysis , mathematics , combinatorics
Herein we report for the first time full details on the synthesis and structural characterization of novel homodinuclear bridging cobalt and nickel borylene complexes containing bridging carbonyl ligands, an unusual coordination motif rarely before observed for homodinuclear borylene complexes. Furthermore, the homodinuclear nickel complex represents the first instance of a nickel borylene complex. Quantum chemical analyses of charge‐density topology, electron localization function (ELF) and natural charges indicate the absence of direct metal–metal bonds in both the cobalt and nickel systems, in contradiction with electron counting. The topology of the Laplacian of the electron density and of the ELF around the bridging boron atom is consistent with a bis‐metallo‐substituted borane situation for the dicobalt system, but with a three‐center‐bonding borylene for the dinickel complex.