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Cyclometalation of Phenylpyridines by Rhodium(I) via Room‐temperature C–H Bond Activation
Author(s) -
Böttcher HansChristian,
Graf Marion,
Mayer Peter
Publication year - 2015
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201500527
Subject(s) - iridium , rhodium , dichloromethane , chemistry , cyclooctene , medicinal chemistry , oxidative addition , photochemistry , polymer chemistry , catalysis , organic chemistry , solvent
A convenient synthesis of cyclometalated complexes [{Rh(μ‐Cl)(C N) 2 } 2 ] [C N = ppy, 2‐phenylpyridinato ( 2 ); C N = ptpy, 2‐( p ‐tolyl)pyridinato ( 3 ); 4‐Clppy = 4‐chloro‐2‐phenylpyridinato ( 4 )] at room temperature is described. The compounds were obtained by the oxidative addition reaction of the corresponding 2‐phenylpyridines to [{Rh(μ‐Cl)(coe) 2 } 2 ] ( 1 ) (coe = cis ‐cyclooctene) in dichloromethane solution. The rate of the reaction seems to depend on the electronic influence of the substituents on the phenyl rings of the corresponding 2‐phenylpyridines. The analogous iridium complex of 1 reacted markedly only at higher temperatures in suitable solvents under cyclometalation. The molecular structure of the new compound 4 was additionally confirmed by an X‐ray diffraction study.