Investigation of N‐Heterocyclic Carbene‐Supported Group 12 Triflates as Pre‐catalysts for Hydrosilylation/Borylation |
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| Authors: | Matthew M D Roy Dr Michael J Ferguson Dr Robert McDonald Prof Dr Eric Rivard |
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| Affiliation: | Department of Chemistry, University of Alberta, Edmonton, AB, Canada |
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| Abstract: | N‐Heterocyclic carbene (NHC) complexes of Cd and Hg triflates (OTf) were prepared and their attempted conversion into rare cadmium and mercury hydrides was explored. In contrast to zinc, which forms stable ZnH]+ complexes with NHCs, the heavier Cd and Hg congeners could not be formed; the increased instability of Cd‐H and Hg‐H units was rationalized with the aid of computations. It was also discovered that the dimeric adduct IPr?Cd(μ‐OTf)2]2 (IPr=(HCNDipp)2C:]; Dipp=2,6‐iPr2C6H3) is an active precatalyst for the hydrosilylation and hydroborylation of hindered aldehydes and ketones. The related zinc congener was inactive as a catalyst highlighting a distinct advantage of using heavy Group 12 metals to promote catalytic hydrosilylation/borylation. |
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| Keywords: | cadmium carbene hydroborylation hydrosilylation mercury |
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