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New Pyridine−Imidazoline Ligands for Palladium‐Catalyzed Copolymerization of Carbon Monoxide and Styrene
Author(s) -
Bastero Amaia,
Ruiz Aurora,
Claver Carmen,
Castillón Sergio
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200112)2001:12<3009::aid-ejic3009>3.0.co;2-8
Subject(s) - chemistry , copolymer , carbon monoxide , pyridine , palladium , catalysis , cationic polymerization , moiety , polymer chemistry , styrene , imidazoline receptor , medicinal chemistry , organic chemistry , polymer , medicine
C 1 ‐symmetrical pyridine−imidazoline ligands have been synthesised and used in the preparation of Pd II complexes of general formula [PdMe(NCMe)(N‐N′)][BAr′ 4 ] [Ar′ = 3,5‐(CF 3 ) 2 C 6 H 3 ]. The introduction of electronically different substituents in the imidazoline moiety determines the coordination position of the methyl group in the cationic complexes, which are catalyst precursors for the copolymerization of carbon monoxide and 4‐ tert ‐butylstyrene (TBS). Interestingly, the use of a precatalyst with a different stereochemistry provides copolymers with a different stereoregularity.