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1.
Contreras Ricardo R. Fontal Bernardo Bahsas Alí Suárez Trino Reyes Marisela Bellandi Fernando Nava Flor Cancines Pedro 《Transition Metal Chemistry》2004,29(1):51-55
The synthesis of [benzyl-N,N-alkylbis(2-amino-1-cyclopentencarbodithioate)]MII [alkyl = ethene (L2) and propene, (L3) and M = Cu, Ni and Co] complexes and their characterization (u.v.–vis., FT-IR, 1H-n.m.r., mass spectra and cyclic voltametry) are reported. 相似文献
2.
Ricardo R. Contreras Bernardo Fontal Marisela Reyes Trino Surez Fernndo Bellandi All Bahsas 《Journal of heterocyclic chemistry》2001,38(5):1223-1225
The new compound Methyl‐2,4‐bis(cyclohexane)dispiro‐1,2,3,4,4a,5,6,7‐octahydro‐(1H,3H)‐quinazo‐line‐8‐carbodithioate has been synthesized from cyclohexanone and carbon disulfide. It has been characterized by uv‐visible, FTTR , mass spectra and a complete structure proposed based on 1H and 13C NMR spectroscopy. 相似文献
3.
PMR spectra of a variety of 4,4,5,5-tetramethyl-1,3,2-dioxaphospholanes, bearing different substituents at phosphorus, have been determined at different temperatures. There is no inversion at phosphorus detectable. The P-chloro compound undergoes a chemical exchange process the rate of which is concentration dependent. 相似文献
4.
Sergio L. González-Cortés José Orozco Delfin Moronta Bernardo Fontal Freddy E. Imbert 《Reaction Kinetics and Catalysis Letters》2000,69(1):145-152
Methane transformation over Ni and Cu modified Sr2+/La2O3 catalysts has been studied. These species favor formation of reducible mixed oxides and change the surface reactivity of the Sr2+/La2O3 system, modifying the reaction mechanism, since Sr2+/La2O3 favors methane oxidative coupling but with copper methane combustion is favored and nickel favors partial oxidation. 相似文献
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6.
Trino Suárez Bernardo Fontal Gustavo León Marisela Reyes Fernando Bellandi Ricardo R. Contreras Pedro Cancines 《Transition Metal Chemistry》2006,31(7):974-976
Catalysis with water-soluble rhodium complexes, RhCl(CO)(TPPMS)2, [TPPMS = P(C6H5)2(C6H4SO3)] (1), RhCl(CO)(TPPDS)2, [TPPDS = P(C6H5)(C6H4SO3)2] (2) and RhCl(CO)(TPPTS)2, [TPPTS = P(C6H4SO3)3] (3) in hydroformylation of 1-hexene, 2-pentene, 2,3-dimethyl-1-butene, cyclohexene and several mixtures of these olefins have
been studied, under moderate reaction conditions (T: 50–150 °C; pCO/pH2 = 1; total p: 14–68 bar; Substrate/Catalyst: 600/1) in biphasic toluene/water media. The catalytic system shows high activity
but low selectivity. The linear and branched oxygenated products obtained are equally useful in naphtha upgrading, as observed
in the real El Palito naphtha tried. The catalysts can be recycled several times without significant activity loss. 相似文献
7.
Suárez Trino Fontal Bernardo Reyes Marisela Bellandi Fernando Contreras Ricardo R. Millán Enrique Cancines Pedro Paredes Danny 《Transition Metal Chemistry》2003,28(2):217-219
A mononuclear RuCl2(DMSO)(TPPMS)3 complex (1) (TPPMS = triphenylphosphine monosulfonate) has been synthesized. Spectroscopic analysis by i.r., u.v.–vis., 1H-, 13C-, 31P-n.m.r., cyclic voltammetry, m.s. analysis and MO calculations were in agreement with a possible octahedral structure. Biphasic (H2O/PhMe) catalytic studies have shown good olefin hydrogenation activity by the complex at moderate temperature and pressure. 相似文献
8.
Trino Suárez Bernardo Fontal Ghery Zambrano Marisela Reyes Fernando Bellandi Ricardo R. Contreras Juan C. Diaz Pedro Cancines Yuraima Fonseca Isolda Romero 《Reaction Kinetics and Catalysis Letters》2008,94(1):21-26
Reaction between Mo(CO)6 and p-C5NH4SO3Na (1:2 (Mo: p-C5NH4SO3Na) stoichiometric ratio) gave the trans-Mo(CO)4(p-C5NH4SO3Na)2 complex, (1), in 80% yield. Complex (1) has been characterized by FTIR, 1H and 13C NMR spectroscopy. Complex (1) has most likely an idealized D4h geometry with trans N-bound p-C5NH4SO3Na ligands. 相似文献
9.
Trino Suárez Bernardo Fontal Marisela Reyes Fernando Bellandi Ricardo R. Contreras Alí Bahsas Gustavo León Pedro Cancines Belsymar Castillo 《Reaction Kinetics and Catalysis Letters》2004,82(2):317-324
RuCl2(TPPMS)3(DMSO) (complex I) shows good catalytic 1-hexene hydrogenation activity in toluene/water biphasic medium under moderate conditions,
reaching 90% conversion in 5 hours, with good hydrogenation selectivity and low isomerization products. The effect of various
parameters (temperature, H2 pressure, reaction time, substrate/catalyst ratio, added electrolytes and other additives) on the hydrogenation reaction
were studied. Complex (I) shows good stability in the reaction medium and can be reused several times.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
10.
Trino Suárez Bernardo Fontal Ghery Zambrano Marisela Reyes Fernando Bellandi Ricardo R. Contreras Juan C. Diaz Pedro Cancines Yuraima Fonseca Isolda Romero 《Reaction Kinetics and Catalysis Letters》2008,94(1):27-34
Trans-bis(sodium pyridine-p-sulphonate)tetracarbonylmolybdenum(0) complex, (trans-Mo(CO)4(p-PySO3Na)2, (1)) was used as a catalytic precursor for the 1-hexene hydroformylation reaction, in biphasic toluene/water medium (T =
100°C, syngas total pressure = 600 psi, pH2/pCO = 1). Complex (1) showed good activity favoring the linear aldehyde. Likewise as other organic olefin substrates and
with synthetic and real naphtha, good conversions to oxygenated products were obtained. 相似文献