Chemical Society

American Chemical Society.

The american chemical society: fact and fancy.

ARTICLES Ultraviolet Spectroscopy and the Composition of Cometary Ice: P. D. Feldman....................................................... Sweden Beyond Oil: The Efficient Use of Energy: T. B. Johansson et al. ................................................. Obsidian Dating and East African Archeology: J. W. Michels, I. S. T. Tsong, C. M. Nelson...................................................

Journal of the Chilean Chemical Society

The fulvene complex (η-C5Me4CH2 )Re(CO)2(C6F5) 1a reacts with alkyl phosphines to yield the zwitterionic species (η-C5Me4CH2 PR3)Re(CO)2(C6F 5) 2 (R = Me, Et, Pr). Reaction of the analogous iodo complex (η-C5Me4CH2 )Re(CO)2I, 1b, with PMe3 and PEt3 affords the cationic species [(η-C5Me4CH2 (PR3))Re(CO)2(PR3)] + I 3 (R = Me, Et). However, reaction of 1b with P Pr3 yields the zwitterion (η-C5Me4C...

Journal of the Chilean Chemical Society

New materials, based on the well-known spinel compound NiMn2O4, have been synthesized and characterized from the magnetic point of view. The manganese cation was partially substituted in the general formula NiMn2-xMexO4 , by nonmagnetic and magnetic elements, such as Me = Ga, Zn, Ni and Cr (0 x 1). Prior to the determination of their magnetic properties, the non-substituted spinel NiMn2O4 was c...

Journal of the Chilean Chemical Society

The effect of the preparation method of Co/TiO2 catalysts on the performance in the liquid phase hydrogenation of cinnamaldehyde and crotonaldehyde has been studied. The Co/TiO2 catalysts were prepared by impregnation on titania (TiO2, P-25), sol-gel, and precipitation procedures. Different reduction-oxidation-reduction cycles were carried out in order to detect possible changes in the nature o...