1,721,073 research outputs found
Coordination and stereochemical influence of 1,3,5,7-tetramethyl-2,6,9-trioxo-biciclo-[3.3.1]-nona-3,7-diene in cationic Pd(II) and Rh(I) complexes
No full text
Two geometrical isomers of the five-coordinate Platinum(II) complex [PtBr(SePh(2,9-dimethyl-1,10-phenanthroline)(dimethylmaleate)]
No full textThe oxidative addition of phenylselenium bromide to three-coordinate Pt(0) complex [Pt(2,9-dimethyl-1,10-phenanthroline)(dimethylmaleate)] affords the corresponding five-coordinate Pt(II) complex having trigonal-bipyramidal coordination geometry. The product of the reaction exists as two geometrical isomers (rotamers): in the kinetically favoured compound the olefin substituents are on the same side of the bromide ligand, while the most thermodynamically stable isomer holds the same substituents pointing at the phenylselenenide ligand. The crystal structure of the two isomers is reported and discussed with respect to the reaction mechanism and thermodynamic stability
[(1,2,5,6-eta)-cycloocta-1,5-diene)bis(4-methoxyphenyl)platinum(II)
No full textThe title compound, [Pt(C7H7O)2(C8H12)], is a precursor to
aryl PtII complexes containing N or P ligands, which are
currently being investigated due to their possible role in C—H
and C—C bond formation. The coordination geometry around
the Pt atom is square planar, while the coordinated cycloocta-
1,5-diene ligand adopts a twist-boat conformation
Hydrolysis of Pd(II)-bound acetonitrile: Molecular and crystal structure of the syn isomer of the dinuclear (1,10-phenanthroline)palladium(II) complex bridged with acetamido groups and of its acetonitrile solvate
No full textAlkali activated waste fly ash as sustainable composite: Influence of a curing and pozzolanic admixtures on the early-age physico-mechanical properties and residual strength after exposure at elevated temperature
No full textWaste fly ash, referred in literature also as "weathered", represents a major management issue for coal-fired power plants. The low qualification of this relevant fraction of produced fly ash is not adequate for recycling in structural concrete. Non-structural applications may represent an economically feasible solution to maximize the recovery of coal fly ash from power plants. A potentially valuable recycling track may be represented by alkaline activation for the production of sustainable precast elements based on geopolymeric binders. In this work, three mineral admixtures, namely blast furnace slag, silica fume and metakaolin, were used to synthesize binary alkali activated binders whose major volumetric fraction was waste fly ash. Three curing temperatures (20, 40, 60 °C) were also considered. Early age kinetics and properties development were assessed by means of strength development and ultrasonic pulse velocity. Residual compressive strength after exposure at high temperature was also assessed in order to highlight typical geopolymeric thermal resistance which is generally observed for higher value raw materials. Furthermore, microstructural analysis was carried out by means of scanning electron microscopy. Silica fume exhibited an increasing detrimental effect (formation of agglomerates/partial foaming) with early age curing temperature, while blast furnace slag and metakaolin revealed to be effective admixtures without strict need of higher curing temperatures
Benzyl-4,6-O-isopropylidene-a-D-glucopyranoside,2-deossi-2-[[(2-hydroxy-3,5-di-tertbutylphenyl)-methylene]imine] as a ligand for vanadium-catalyzed asymmetric oxidation of sulfides
No full text
Copper(II) chiral complexes as components of cholesteric liquid crystals for optical applications
No full text- …
