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New Five Coordinate Ru(II) Carbonyl Complexes Containing 2‐Aminofluorene Schiff Base Derivatives: Synthesis, Structure and Catalytic Activity
Author(s) -
Ramesh Madhan,
Venkatachalam Galmari
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801643
Subject(s) - chemistry , ruthenium , schiff base , denticity , aldehyde , catalysis , chelation , crystal structure , medicinal chemistry , yield (engineering) , proton nmr , base (topology) , stereochemistry , crystallography , inorganic chemistry , organic chemistry , materials science , metallurgy , mathematical analysis , mathematics
The monometallic five coordinated ruthenium(II) Schiff base complexes of the general type [Ru(CO)(EPh 3 ) 2 (L 1−3 )]Cl (E=P or As) have been synthesized and characterized by analytical and spectral (FT−IR, UV−Vis and 1 H NMR) methods. The electronic spectra of the complexes indicate the presence of intense MLCT transitions in the visible region. The molecular structure of the complex [Ru(CO)(PPh 3 ) 2 (L 3 )]Cl 5 was characterized by single crystal X−ray diffraction studies, which revealed that the Schiff base ligands coordinated to the ruthenium(II) ion as mono anionic bidentate (O, N) donor forming six membered chelating rings. Further, the five coordinate [Ru(CO)(PPh 3 ) 2 (L 3 )]Cl 5 complex was found efficiently to catalyze the formation of amides from various substituted aldehyde and showing higher catalytic activity in the presence of NH 2 OH.HCl and NaHCO 3 and the yield was up to 97%.