Aerial oxidation of primary alcohols and amines catalyzed by Cu(II) complexes of 2,2'-selenobis(4,6-di-tert-butylphenol) providing [O,Se,O]-donor atoms

Dalton Transactions : an International Journal of Inorganic Chemistry
Tapan K PaineP Chaudhuri

Abstract

Seven copper(II)-complexes 1-7 with the ligand 2,2'-selenobis(4,6-di-tert-butylphenol) providing [O,Se,O]-donor atoms have been isolated and characterized. Three of them 1, 2 and 3 are mononuclear, two 4 and 7 dinuclear and 5, 6 are trinuclear. The crystal structures of the complexes were determined by X-ray diffraction and the electronic structures were established by various physical methods including EPR and variable temperature (2-290 K) susceptibility measurements. The magnetic behaviour of the compounds 4-6 exhibits antiferromagnetic exchange coupling resulting in well-isolated S(t)= 1/2 ground state for 5 and 6 and a diamagnetic spin state for 4. Complexes 5 and 6 belong to the class of asymmetric trinuclear copper(II) complexes modelling the trinuclear copper site in multicopper oxidases. Complex 1 is a catalyst in the presence of a strong base for the aerial oxidation of primary alcohols to the corresponding aldehydes. A dinuclear complex, seemed to be 4, prepared in situ has been found to be a catalyst for the aerial oxidation of primary amines containing alpha-C-H atoms. Primary kinetic isotope effects show that H-abstraction from the alpha-carbon atom of a coordinated substrate (alcoholato or amine) is the rate-dete...Continue Reading

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Citations

Nov 8, 2011·Acta Crystallographica. Section E, Structure Reports Online·Gervas AsseyYilma Gultneh
Sep 12, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Andrew C BehrleJustin R Walensky
Nov 8, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Hanna BaumgarthThomas Braun
Feb 14, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Olaf RotthausJean-Louis Pierre
May 15, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Alex JohnPrasenjit Ghosh
May 11, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Lin ChengZhijian Wu
Dec 17, 2005·Dalton Transactions : an International Journal of Inorganic Chemistry·Alison K NairnPaul H Walton
Dec 17, 2005·Dalton Transactions : an International Journal of Inorganic Chemistry·Ekaterina ZuevaJohn E McGrady
Sep 19, 2008·Nature·Lawrence Que, William B Tolman
Nov 13, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Soumen MukherjeePhalguni Chaudhuri
Aug 16, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Oindrila Das, Tapan Kanti Paine
Jun 30, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Md MijanuddinMahammad Ali
Apr 8, 2009·Inorganic Chemistry·Alberto Donzelli, Pierre G Potvin
Jun 22, 2013·Chemical Reviews·Scott E AllenMarisa C Kozlowski
Feb 24, 2006·The Journal of Physical Chemistry. a·Helmut GörnerPhalguni Chaudhuri

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