1,721,141 research outputs found
Synthesis, Properties, and X-Ray Structure of (Diethylene- triamine)copper(I) Carbonyl: a Highly Thermally Stable Copper(I) Amine Carbonyl
No full textPeripheral Electrophilic Properties of Dichloro[N,N'-ethylenebis (salicylideneiminato)]titanium(IV): A Route leading to a Stable Ti-H-B Unit.
No full textThe title complex [Ti(salen)Cl2] (1) [salen = NN′-ethylenebis(salicylideneiminate)] reacts with a thf solution of LiBH4 to give [{Ti(salen)(BH4)2}2]·2thf (2) as an orange crystalline solid. Complex (2) is formed by the substitution of Cl- by BH4- followed by addition of BH4- to the imino-groups of the salen ligand. The i.r. spectrum shows the disappearance of bands due to -C=N- and the presence of strong bands due to Ti-H and B-H vibrations, which are shifted to lower values in the deuteriated derivative [{Ti(salen)(BD4)2}2]·thf (3). Crystals of (2) are formed in dimeric units having crystallographic Ci(1̄) symmetry. Each metal atom surrounded by the sexidentate ligand (salen) (BH4)2 having a H2N2O2 set of donor atoms achieves seven-co-ordination by sharing one of the salen oxygens with the other titanium of the dimeric unit. Other relevant structural features of complex (2) are the presence of BNH2 groups bonded to titanium through a bridging hydrogen, and the consequent existence of two electron-deficient four-membered rings, B-H-Ti-N. The Ti(salen)(BH4)2 unit is supposed to form from a titanium-promoted activation of the 2 bonds on the lefthand side signC=N- bond in [Ti(salen)Cl2]. [{Ti(salen)(BH4)2}2]·2thf (2) crystallises in the space group P21/c with a = 11.802(9), b = 20.039(15), c = 9.272(6) Å, β = 90.00(5)°, and Z = 2. The final R factor was 0.068 for 1 028 observed reflections
Deoxygenation of vanadyl Schiff's base complexes: conversion of oxocation complexes into halogeno-derivatives
No full textDeoxygenation of vanadyl Schiff's base complexes by SOCl2 gave the corresponding dichloro-derivatives of vanadium(IV)
(Pyridine)bis(8-quinolinolato)oxovanadium(IV): a free-radical-like metal center in reactions with dioxygen, p-benzoquinone, and aromatic nitroso compounds
No full textDeoxygenation of Oxovanadium(IV) Complexes: A Novel Synthetic Route to Dichlorovanadium(IV) Chelate Complexes
No full textCopper-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
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