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Effect of 2‐Bromopyridine Ancillary Ligand in the Catalysis of Pd(II)‐NNN Pincer Complexes towards Suzuki‐Miyaura Cross‐Coupling Reaction
Author(s) -
Jerome Peter,
Arafath Sharfudeen Yasar,
Haribabu Jebiti,
Bhuvanesh Nattamai S. P.,
Karvembu Ramasamy
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803893
Subject(s) - pincer movement , chemistry , ligand (biochemistry) , acetonitrile , pincer ligand , catalysis , steric effects , medicinal chemistry , palladium , combinatorial chemistry , stereochemistry , organic chemistry , receptor , biochemistry
Pd(II)‐NNN pincer complexes containing sterically hindered 2‐bromopyridine ( sp 2 hybridized N donor) as ancillary ligand have been synthesized in order to compare their catalytic efficiency with the reported analogous complexes containing acetonitrile ( sp hybridized N donor) ancillary ligand. The complexes have been characterized by analytical and spectroscopic techniques. Single crystal XRD reveals distorted square planar structure of complex 1 . These complexes have been investigated as catalysts for the Suzuki‐Miyaura cross‐coupling (SMC) reaction. The scope is extended using various substituted aromatic/aliphatic halides. The activity of the Pd(II)‐NNN pincer complexes bearing bulky 2‐bromopyridine ancillary ligand is not higher compared to that of the complexes with acetonitrile ancillary ligand, which shows superiority of acetonitrile ancillary ligand.