216 research outputs found
Effects of in-depth inhomogeneities of the optical absorption spectra of a-Si:H films: theory and quantitative evaluations
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Accurate reconstruction. of the density of states in a-Si:H by photothermal and photonductive spectra
No full textCopper(I)–histamine system: a reversible carbon monoxide carrier. Isolation and X-ray crystal structure of two Cu–histamine–CO complexes
No full textReaction of a methanolic suspension of CuCOCl with histamine (hm) at 0°C gives a solution from which [Cu(hm)CO]BPh4[νCO(Nujol) 2091 cm–1] is recovered, while a methanolic suspension of CuI in the presence of histamine reversibly absorbs carbon monoxide [1 CO per Cu] giving [Cu2(hm)3(CO)2]2+; X-ray analysis of [Cu2-(hm)3(CO)2](BPh4)2[νCO(Nujol) 2055 and 2066 cm–1] shows the presence of a dimeric cation with one histamine chelated to each copper, and the other one bridging the two metal atoms
Copper-amine-carbonyl chemistry. Solution and solid-state studies of the copper(I)-ethylenediamine-carbon monoxide system: synthesis and x-ray structures of mononuclear and binuclear copper(I)-carbonyl complexes
No full textCoppper(I) ethylenediamine carbonyl complexes: ‘models’ for carbon monoxide activation. X-Ray structure of the ion-pair carbonylethylenediaminetetraphenylboratocopper
No full textCopper (I) iodide absorbs carbon monoxide in methanol in the presence of ethylenediamine (en), giving solutions from which [Cu2(en)3(CO)2]I2, [Cu2(en)3(CO)2](BPh4)2, and [Cu(en)2CO]I have been obtained as thermally stable compounds; the reaction of CuCOCl with en allowed the isolation of [Cu(en)(CO)PhBPh3], an X-ray structure determination of which shows the presence of a three-co-ordinate copper(I) interacting with the BPh4– anion
Carbon monoxide absorption by copper(I) halides in organic solvents: isolation and structure of .mu.-halogeno-dicopper(I) carbonyl complexes
No full textBridging phenoxo-ligands in dicopper(I) complexes: synthesis and structure of tetrakis(isocyanide)-bis(μ-phenoxo)-dicopper(I) complexes
No full textThe reaction of CuCl with PhONa followed by the addition of RNC (R = cyclohexyl, p-tolyl) gave as thermally stable crystalline solids [(RNC)4Cu2(OPh)2] containing a dicopper(I) unit doubly bridged by two phenoxo-groups [R =p-tolyl; Cu ... Cu, 3.223(3)Å], with isocyanide ligands completing the tetraco-ordination around each copper [ν(C–N): R =p-tolyl, 2120 and 2145 cm–1; R = cyclohexyl, 2130 and 2160 cm–1]
Carbon monoxide bridges two copper centers which experience a very short metal-metal proximity in [Cu2(tmen)2(.mu.-CO)(.mu.-PhCO2)](BPh4)
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