The reaction of hexacyanochromate with connectivity 6 and a mononuclear Ni complex bearing a bulky tridentate macrocycle leads in one step to the formation of a nonanuclear Cr2Ni7 complex with central low spin and peripheral high spin Ni ions; fast tunnelling of the magnetization is observed at low temperature by micro-SQUID studies on a single crystal.
Structures, Spectroscopic Properties, and Dioxygen Reactivity of 5- and 6-Coordinate Nonheme Iron(II) Complexes: A Combined Enzyme/Model Study of Thiol Dioxygenases
作者:Jesse B. Gordon、Jeremy P. McGale、Joshua R. Prendergast、Zahra Shirani-Sarmazeh、Maxime A. Siegler、Guy N. L. Jameson、David P. Goldberg
DOI:10.1021/jacs.8b08349
日期:2018.11.7
helping to clarify the coordination environment of the cys-bound FeII active site. Reaction of 1 or 2 with O2 at -95 °C leads to S-oxygenation of the abt ligand, and in the case of 2, a rare di(sulfinato)-bridged complex, [Fe2III(μ-O)((2-NH2) p-CF3C6H3SO2)2](OTf)2 ( 5), was obtained. Parallel enzymatic studies on the CDO variant C93G were carried out with the abt substrate and show that reaction with O2
Catalytic reduction of nitric oxide to nitrous oxide by alcohols mediated by copper(I) complexes
作者:Samiran Mahapatra、Jason A. Halfen、William B. Tolman
DOI:10.1039/c39940001625
日期:——
a reaction relevant to environmetally important processes carried out by copper-containing enzymes and heterogeneous catalysts, copper(I) complexes of 1,4,7-triisopropyl-1,4,7-triazacyclononane dissolved in alcohols (e.g. benzyl alcohol) efficiently promote the reduction of NO to N2O by the solvent at room temperature, yielding the respective carbonyl compounds (e.g. benzaldehyde).
The bulky tridentate macrocycle 1,4,7-triisopropyl-1,4,7-triazacyclononane (L) has been prepared and its co-ordinationchemistry investigated. Reaction of L with [M(CO)6] in refluxing mesitylene affords airstable [ML(CO)3](M = Cr 1, Mo 2 or W 3) in excellent yields. Oxidation of complexes 1 and 2 with SOCl2 in CCl4 yields [MLCl3](M = Cr 4 or Mo 5) whereas [MLBr3](M = Cr 6 or Mo 7) were obtained by