Tandem deoxygenative hydrosilation of carbon dioxide with a cationic scandium hydridoborate and B(C 6 F 5 ) 3

A scandium hydridoborate complex supported by the dianionic pentadentate ligand B Pz Py is prepared via hydride abstraction from the previously reported scandium hydride complex with tris-pentafluorophenyl borane. Exposure of [(B Pz Py)Sc][HB(C F ) ] to CO immediately forms [(B Pz Py)Sc][HCOOB(C F )...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2020-01, Vol.49 (1), p.95-101
Main Authors: Beh, Daniel W, Piers, Warren E, Gelfand, Benjamin S, Lin, Jian-Bin
Format: Article
Language:English
Subjects:
Carbon dioxide
Crystallography
Deoxygenation
Hydrides
Room temperature
Scandium
Transition metals
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Summary:A scandium hydridoborate complex supported by the dianionic pentadentate ligand B Pz Py is prepared via hydride abstraction from the previously reported scandium hydride complex with tris-pentafluorophenyl borane. Exposure of [(B Pz Py)Sc][HB(C F ) ] to CO immediately forms [(B Pz Py)Sc][HCOOB(C F ) ] at room temperature. The formatoborate complex can also be synthesized directly from the starting material (B Pz Py)ScCl with Et SiH and B(C F ) while in the presence of an atmosphere of CO in 81% yield. This compound was evaluated as the transition metal component of a tandem deoxgenative CO hydrosilation catalyst. At 5% loadings, complete consumption of Et SiH was observed along with CO reduction products, but conversion to an inactive scandium complex identified as (B Pz Py)ScOSiEt was observed.
ISSN:1477-9226
1477-9234
DOI:10.1039/c9dt04323c