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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4136
Title: A mononuclear cobalt(II) hydroxo complex: Synthesis, molecular structure, and reactivity studies
Authors: Singh U.P.
Babbar P.
Tyagi P.
Weyhermüller T.
Published in: Transition Metal Chemistry
Abstract: A novel Co(II) hydroxo complex Co{HB(3-tBu-5- iPrpz)3}(OH) 4 {where HB(3-tBu-5- iPrpz)3 = hydrotris(3-tert-butyl-5-isopropylpyrazol-l-yl) borate} has been prepared and its molecular structure has been determined by X-ray crystallography. This complex is mononuclear with distorted tetrahedral geometry. The reaction of CO2 with Co{HB(3-tBu-5- iPrpz)3}(OH) resulted in the formation of a μ-carbonato bridged binuclear complex [Co{HB(3-tBu-5-iPrpz) 3}]2(CO3) wherein the carbonate group is bound to both metal centers in an asymmetrical manner. In order to explore the role of labile metal complexes in promoting ester hydrolysis, complexes [Co{HB(3,5-iPr2pz)3}]2(OH) 2 and Co{HB(3-tBu-5-iPrpz)3}(OH) have been used as catalysts in the hydrolysis of both carboxylate as well as phosphate esters. The product of 4-nitrophenylacetate hydrolysis with Co{HB(3-tBu-5-iPrpz)3}(OH) was isolated as four coordinate Co{HB(3-tBu-5-iPrpz)3}(OC 6H4-4-NO2) 6, whereas the reaction of 4-nitrophenyltrifluoroacetate with [Co{HB(3,5-iPr2pz) 3}]2(OH)2 resulted the formation of the six coordinate Co{HB(3,5-iPr2pz)3}(OC 6H4-4-NO2)(MeCN)2 species. © 2008 Springer Science+Business Media B.V.
Citation: Transition Metal Chemistry (2008), 33(8): 931-940
URI: https://doi.org/10.1007/s11243-008-9143-2
http://repository.iitr.ac.in/handle/123456789/4136
Issue Date: 2008
ISSN: 3404285
Author Scopus IDs: 57203181883
6506387993
15078136900
56264249100
Author Affiliations: Singh, U.P., Department of Chemistry, Indian Institute of Technology, Roorkee 247 667, India
Babbar, P., Department of Chemistry, Indian Institute of Technology, Roorkee 247 667, India
Tyagi, P., Department of Chemistry, Indian Institute of Technology, Roorkee 247 667, India
Weyhermüller, T., Max-Planck-Institut für Bioanorganische Chemie, Stifstrasse 34-36, Mulheim an der Ruhr 45470, Germany
Funding Details: Acknowledgments The authors are thankful to CSIR and AICTE, New Delhi, for the financial support in the form of research projects. UPS is grateful to the Alexander von Humbold Foundation for supporting the visit to Max-Planck-Institute für Bioanorganische Chemie, Mülheim, Germany, and Prof. K. Wieghardt for providing laboratory space and also for his continuous encouragement during my stay.
Corresponding Author: Singh, U. P.; Department of Chemistry, Indian Institute of Technology, Roorkee 247 667, India; email: udaipfcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

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