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Pyridine N-oxide promoted hydrosilylation of carbonyl compounds catalyzed by [PSiP]-pincer iron hydrides.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 7/21/2020, Vol. 49 Issue 27, p9349-9354, 6p
- Publication Year :
- 2020
-
Abstract
- Five [PSiP]-pincer iron hydrides 1–5, [(2-Ph<subscript>2</subscript>PC<subscript>6</subscript>H<subscript>4</subscript>)<subscript>2</subscript>HSiFe(H)(PMe<subscript>3</subscript>)<subscript>2</subscript> (1), (2-Ph<subscript>2</subscript>PC<subscript>6</subscript>H<subscript>4</subscript>)<subscript>2</subscript>MeSiFe(H)(PMe<subscript>3</subscript>)<subscript>2</subscript> (2), (2-Ph<subscript>2</subscript>PC<subscript>6</subscript>H<subscript>4</subscript>)<subscript>2</subscript>PhSiFe(H)(PMe<subscript>3</subscript>)<subscript>2</subscript> (3), (2-(iPr)<subscript>2</subscript>PC<subscript>6</subscript>H<subscript>4</subscript>)<subscript>2</subscript>HSiFe(H)(PMe<subscript>3</subscript>) (4), and (2-(iPr)<subscript>2</subscript>PC<subscript>6</subscript>H<subscript>4</subscript>)<subscript>2</subscript>MeSiFe(H)(PMe<subscript>3</subscript>)<subscript>2</subscript> (5)], were used as catalysts to study the effects of pyridine N-oxide and the electronic properties of [PSiP]-ligands on the catalytic hydrosilylation of carbonyl compounds. It was proved for the first time that this catalytic process could be promoted with pyridine N-oxide as the initiator at 30 °C because the addition of pyridine N-oxide is beneficial for the formation of an unsaturated hydrido iron complex, which is the key intermediate in the catalytic mechanism. Complex 4 as the best catalyst shows excellent catalytic performance. Among the five complexes, complex 3 was new and the molecular structure of complex 3 was determined by single crystal X-ray diffraction. A proposed mechanism was discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 49
- Issue :
- 27
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 144621380
- Full Text :
- https://doi.org/10.1039/d0dt00392a