Premium
Cationic ruthenium(II)–NHC pincer complexes: Synthesis, characterisation and catalytic activity for transfer hydrogenation of ketones
Author(s) -
Yadav Dibya,
Misra Shilpi,
Kumar Dheeraj,
Singh Suryabhan,
Singh Amrendra K.
Publication year - 2021
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.6287
Subject(s) - transfer hydrogenation , chemistry , ruthenium , pincer movement , cationic polymerization , triphenylphosphine , pyridine , hydride , catalysis , medicinal chemistry , halide , hydrogen , polymer chemistry , organic chemistry
Cationic ruthenium pincer complexes, [Ru(CNC)(CO)(PPh 3 )Cl]X (CNC = 2,6‐bis(1‐methylimidazol‐2‐ylidene)‐pyridine, X = Cl − [ 1a ], PF 6 − [ 1b ]), [Ru(CNC)(PPh 3 ) 2 Cl]X (X = Cl − [ 2a ], PF 6 − [ 2b ]) and [Ru(CNC)(PPh 3 ) 2 (H)]X (X = Cl − [ 3a ], PF 6 − [ 3b ]) with triphenylphosphine, CO and halides as coligands have been synthesised and characterised by 1 H, 13 C, 31 P NMR, mass and single‐crystal X‐ray crystallography. The application of Ru complexes in the transfer hydrogenation of a wide range of ketones with 2‐propanol as the hydrogen source is explored. The in situ transformations observed during the synthesis help understand and suggest a plausible mechanism via the hydride complex 3b . All complexes appear to be efficient catalyst precursors for transfer hydrogenation of ketones.