Mononuclear transition metal complexes with sterically hindered carboxylate ligands: Synthesis, structural and spectral properties

Title
Mononuclear transition metal complexes with sterically hindered carboxylate ligands: Synthesis, structural and spectral properties
Authors
Sethuraman KannanGalmari VenkatachalaHa-Jin Lee민병권Woong KimEunhae KooYoung RagSungho Yoon
Keywords
Mononuclear metal complexes; Sterically hindered carboxylate ligand; 3,5-Dimethylpyrazole; Crystal structures
Issue Date
2011-02
Publisher
Polyhedron
Citation
VOL 30, NO 2, 340-346
Abstract
The metal coordination geometry in the active site of metalloproteins are very different from the one of small inorganic complexes, due to the inflexibility of the ligand set from amino acid side chains different from freely moving ligand set in synthesis. Using the sterically hindered 2,6-di-(p-fluorophenyl)benzoate( L) ligand, a series of mononuclear Co(II), Ni(II) and Cu(II) complexes of general formula [M(L)2(Hdmpz)2] (where, Hdmpz = 3,5-dimethyl pyrazole) have been synthesized and characterized by the variety of spectroscopic methods. A distorted octahedral geometry in case of nickel, tetrahedral geometry for cobalt and square pyramidal in copper was observed in the X-ray studies, which also revealed that the uncoordinated oxygen atom of the carboxylate group forms intramolecular hydrogen bonding with the N–H group of the coordinated 3,5-dimethylpyrazole in case of cobalt and copper.
URI
http://pubs.kist.re.kr/handle/201004/39314
ISSN
0277-5387
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KIST Publication > Article
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