5 years ago

Systematic Study of N-Heterocyclic Carbene Coordinate Hydrosilylene Transition-Metal Complexes

Systematic Study of N-Heterocyclic Carbene Coordinate Hydrosilylene Transition-Metal Complexes
Gizem Dübek, Tibor Szilvási, Carsten Eisenhut, Shigeyoshi Inoue, Nora C. Breit
The synthesis and isolation of a series of N-heterocyclic carbene (NHC)-coordinate silylene transition-metal complexes are reported. Starting from the NHC-coordinate hydrosilylene [tBu3Si(NHC)(H)Si:] (1), a hydrosilylene iron complex, [tBu3Si(NHC)(H)Si:→Fe(CO)4] (2), was synthesized and fully characterized including X-ray diffraction analysis, which revealed an unusually long Si−Fe bond length. This trend was also observed in the novel hydrosilylene tungsten complex [tBu3Si(NHC)(H)Si:→W(CO)5] (3). In addition, NHC-stabilized silylene iron complexes with various substituents ([R2(NHC)Si:→Fe(CO)4], where R = Cl (4), H (5), and Me (6)) were also prepared to investigate the influence of different functional groups. Computational investigations were carried out to understand the bonding nature of these complexes.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01541

DOI: 10.1021/acs.inorgchem.7b01541

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