Synthesis, crystal structure and reactivity of trans-diaquo N,N′-ethylenebis-(3-methoxysalicylideneiminato)chromium(III) View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2000-04

AUTHORS

Mookandi Kanthimathi, Balachandran Unni Nair, Thirumalachari Ramasami, Jeyaraman Jeyakanthan, Devadasan Velmurugan

ABSTRACT

A new chromium(III) Schiff base complex, [Cr(3-methoxysalen)(H2O)2]ClO4, where salen = N,N′-ethylenebis- (salicylideneimine), has been synthesized and characterized by spectroscopic techniques. Single crystal X-ray data reveals that the complex assumes a trans-diaquo structure with formulation [Cr(C18H22N2O6)]ClO4 but, unlike in Cr (salen)(H2O)2+, the two trans-water molecules are equidistant from CrIII. The effect of the substituent on the phenyl ring in respect of redox reactivity has been investigated. The kinetics of the oxidation of [Cr(Schiff base)- (H2O)2]ClO4, where Schiff base = salen, (1) and 3-OMe-salen, (2) by PhOI has been studied. The bimolecular rate constant for the formation of the O=Crv Schiff base in case of (2) was four times faster than that of (1). The introduction of the OMe group substituent on the phenyl ring influences not only the structure and crystal packing, but also the reactivity of the complex and the electronic environment around the metal ion. More... »

PAGES

145-149

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1007090200950

DOI

http://dx.doi.org/10.1023/a:1007090200950

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1004259120


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