Oxidation of electron deficient olefins using a copper(II) complex based on a bis-benzimidazole diamide ligand
Transition Metal Chemistry, ISSN: 0340-4285, Vol: 33, Issue: 2, Page: 175-182
2008
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- 3Captures
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Article Description
New bis-benzimidazole based diamide ligands N, N′-bis(2-methyl benzimidazolyl)-benzene-1,3-dicarboxamide [GBBA] and N-Octyl-N, N′-bis(2-methyl benzimidazolyl)-benzene- 1,3-dicarboxamide [O-GBBA] have been synthesized and utilized to prepare Cu(II) complexes of general composition [Cu(GBBA)X ] • nHO and [Cu(O-GBBA)X] • n HO, where X is an exogenous anionic ligand (X = Cl , NO , SCN). The oxidation of electron deficient olefins has been investigated using [Cu(O-GBBA)X] • nHO as catalyst and TBHP as an alternate source of oxygen. The respective ketonic products have been isolated and characterized by H-NMR. The complex [Cu(GBBA)(NO)] • 4HO has been characterized structurally. It crystallizes in a monoclinic space group C2/c. Low temperature EPR spectra have been obtained for the complexes that shows g > g > 2.0024, indicating a tetragonal geometry in the solution state. The complexes display a quasi reversible redox wave due to the Cu(II)/Cu(I) reduction process. The E values shift anodically as NO < SCN < Cl. © 2007 Springer Science+Business Media B.V.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=43049163871&origin=inward; http://dx.doi.org/10.1007/s11243-007-9029-8; http://link.springer.com/10.1007/s11243-007-9029-8; http://link.springer.com/content/pdf/10.1007/s11243-007-9029-8; http://link.springer.com/content/pdf/10.1007/s11243-007-9029-8.pdf; http://link.springer.com/article/10.1007/s11243-007-9029-8/fulltext.html; https://dx.doi.org/10.1007/s11243-007-9029-8; https://link.springer.com/article/10.1007/s11243-007-9029-8; http://www.springerlink.com/index/10.1007/s11243-007-9029-8; http://www.springerlink.com/index/pdf/10.1007/s11243-007-9029-8
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