US EPA

607191 

Journal Article 

Catalytic activities of Schiff base transition metal complexes 

Gupta, KC; Sutar, AK 

2008 

Yes 

Coordination Chemistry Reviews
ISSN: 0010-8545 

252 

12-14 

1420-1450 

10.1016/j.ccr.2007.09.005 

WOS:000256770400007 

Abstract: Many Schiff base complexes of metal ions show high catalytic activity. Chiral Schiff base complexes are more selective in various reactions such as oxidation, hydroxylation, aldol condensation and epoxidation. The catalytic activity of metal complexes of binaphthyl, binaphthol and their combinations with salen Schiff base is presented in this review. The pyridyl bis(imide) and pyridine bis(imine) complexes of cobalt(II), iron(II) ions have been used as catalysts in the polymerization of ethylene and propylene. The phenoxy-imine (FI) complexes of zirconium, titanium and vanadium and Schiff base complexes of nickel(II) and palladium(II) were also used as catalysts in the polymerization of ethylene. Schiff base complexes of metal ions were catalytic in ring opening polymerization processes at low temperature. Schiff base complexes also catalyzed the oxidation of sulfides, thioanisoles, aldehydes, phenol and styrene. Schiff base complexes in super critical carbon dioxide (ScCO2) and in the presence of polar solvents were active catalysts. Schiff base complexes showed significant activity in catalyzing allylic alkylations, hydrosilation, the decomposition of hydrogen peroxide, isomerization, and annulation and carbonylation reactions. The high thermal and moisture stabilities of many Schiff base complexes were useful attributes for their application as catalysts in reactions involving at high temperature. [Copyright 2008 Elsevier] Copyright of Coordination Chemistry Reviews is the property of Elsevier Science Publishers B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts) 

LINE geometry; ALGEBRAS, Linear; POLYMERIZATION; EMULSION polymerization; 2; 2,6-di-tert-butyl-4,4′-benzoquinone ( DTBQ ); 2,6-di-tert-butylphenol ( DTBP ); 3-t-Bu-5-(chloromethyl)-2-hydroxybenzaldehyde ( CMTBS ); 4′-benzoquinone ( DTBQ ); 6-di-tert-butyl-4; 6-di-tert-butylphenol ( DTBP ); atom transfer radical polymerization ( ATRP ); ethylene diamine ( en ); layered double hydroxides ( LDHs ); Lewis acid ( LA ); methylaluminiumoxane ( MAO ); micelles templated silica ( MTS ); phenoxy imine ( FI ); ring opening metathesis polymerization ( ROMP ); ship in bottle ( SIB ); supercritical carbon dioxide ( ScCO2 ); tert-butyl hydro peroxide ( t-BHP ); trimethyl silyl diazomethane ( TMSD ); urea hydrogen peroxide ( UHP ); zinc tetraphenylporphyrin ( ZnTPP )