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Ligand Influence on Carbonyl Hydroboration Catalysis by Alkali Metal Hydridotriphenylborates [(L)M][HBPh 3 ] (M=Li, Na, K).
- Source :
-
Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2017 Oct 12; Vol. 23 (57), pp. 14292-14298. Date of Electronic Publication: 2017 Sep 18. - Publication Year :
- 2017
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Abstract
- Alkali metal hydridotriphenylborates [(L <superscript>1</superscript> )M][HBPh <subscript>3</subscript> ] (L <superscript>1</superscript> =Me <subscript>6</subscript> TREN; M=Li, Na, K) chemoselectively catalyze the hydroboration of carbonyls and CO <subscript>2</subscript> , with lithium being the most active system. A new series of complexes [(L <superscript>2</superscript> )M][HBPh <subscript>3</subscript> ] [M=Li (1), Na (2), K (3)] featuring the cyclen-derived macrocyclic polyamine Me <subscript>4</subscript> TACD (L <superscript>2</superscript> ) were synthesized in a "one-pot" fashion and fully characterized including X-ray crystallography. In the crystal, 1-3 exhibit wide variation in metal coordination of the [HBPh <subscript>3</subscript> ] <superscript>-</superscript> anion from lithium to potassium. The structures differ from those in [(L <superscript>1</superscript> )M][HBPh <subscript>3</subscript> ]. Effects of coordination of L <superscript>1</superscript> , L <superscript>2</superscript> , and other N- and O-donor multidentate ligands on [Li(HBPh <subscript>3</subscript> )] were used to rationalize the catalytic activity in carbonyl hydroboration.<br /> (© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Details
- Language :
- English
- ISSN :
- 1521-3765
- Volume :
- 23
- Issue :
- 57
- Database :
- MEDLINE
- Journal :
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 28799668
- Full Text :
- https://doi.org/10.1002/chem.201702818