813 research outputs found
Analysis of relations between epistemological beliefs about mathematics and academic performance
Transport of persistent organic pollutants across the human placenta
Environment International 65, 107-115 (2014
Ruthenium(II) Picolyl-NHC Complexes: Synthesis, Characterization, and Catalytic Activity in Amine N‑alkylation and Transfer Hydrogenation Reactions
Ruthenium(II) p-cymene complexes with picolylfunctionalized N-heterocyclic carbenes [(η6-p-cymene)Ru(L)(Cl)]-
[PF6] (L = 3-methyl-1-(2-picolyl)imidazol-2-ylidene (1a), 3- isopropyl-1-(2-picolyl)imidazol-2-ylidene (1b), 3,4,5-trimethyl- 1-(2-picolyl)imidazol-2-ylidene (1c), 3-mesityl-1-(2-picolyl)- imidazol-2-ylidene (1d), 3-methyl-1-(2-picolyl)benzoimidazol- 2-ylidene (1e), 3-methyl-1-(2-picolyl)-4,5-dichloroimidazol-2- ylidene (1f), 3-phenyl-1-(2-picolyl)imidazol-2-ylidene (1g)) have been synthesized and characterized. Compounds 1a−g were
recrystallized, and X-ray crystal structures are reported for 1a,f. Furthermore, compounds 1a−f show catalytic activity in transfer hydrogenation of ketones and N-alkylation of amines. Notably, complexes 1a,c,f were found to be very efficient and versatile catalysts toward transfer hydrogenation of a wide range of ketones and imines in addition to N-alkylation of several amines
Picolyl−NHC Hydrotris(pyrazolyl)borate Ruthenium(II) Complexes: Synthesis, Characterization, and Reactivity with Small Molecules
Ruthenium(II) hydrotris(pyrazolyl)borate chloro complexes bearing picolyl-functionalized N-heterocyclic carbenes [TpRu- (κ2-C,N-picolyl-RI)Cl] (picolyl-MeI = 3-methyl-1-(2-picolyl)imidazol-2- ylidene) (1a), picolyl-iPrI = 3-isopropyl-1-(2-picolyl)imidazol-2-ylidene (1b), picolyl-Me45DClI = 3-methyl-1-(2-picolyl)-4,5-dichloroimidazol- 2-ylidene (1c), picolyl-PhI = 3-phenyl-1-(2-picolyl)imidazol-2-ylidene (1d), picolyl-MeBI = 3-methyl-1-(2-picolyl)benzoimidazol-2-ylidene (1e)) have been synthesized and characterized. Furthermore, cationic carbonyl derivatives 2a−e have been prepared, characterized, and used to study the donor properties of the picolylcarbene ligands (picolyl-RI) via infrared spectroscopy. Also, the reactivity of the 16-electron species [TpRu(κ2-C,N-picolyl-RI)]+, in situ generated using NaBArF 4 (ArF = 3,5-bis(trifluoromethyl)phenyl) as a halide scavenger, toward N2, CH3CN, H2, CH2CH2, S8, and O2 was studied indicating a strong influence of the NHC wingtip and backbone substituents in the product distribution. The crystal structures of [TpRu(κ2- C,N-picolyl-iPrI)Cl] (1b), [TpRu(κ2-C,N-picolyl-MeI)CO][BArF
4] (2a), [TpRu(κ2-C,N-picolyl-PhI)CO][BArF 4] (2d), [{TpRu(κ2- C,N-picolyl-MeI}2(μ-N2)][BArF 4]2 (3′a), [{TpRu(κ2-C,N-picolyl-PhI)}2(μ-N2)][BArF 4]2 (3′d), [TpRu(κ2-C,N-picolyl-iPrI)(η2- CH2CH2)][BArF 4] (5b), and [{TpRu(κ2-C,N-picolyl-MeI)}2(μ-S2)][BArF 4]2 (6) are reported
Changes in the hydrological cycle, ocean circulation, and carbon/nutrient cycling during the last interglacial
Tourism and indigenous heritage in Latin America: as observed through Mexico’s magical village Cuetzalan: Book Review
Long term consumption of thiamethoxam coated seeds causes multilevel effects to the passerine Agelaiodes badius
Presentación en diapositivasBirds and pesticide treated seeds Birds and pesticide treated seedsBirds and pesticide treated seeds Birds and pesticide treated seedsInstituto de Recursos BiológicosFil: Poliserpi, MarÃa Belén. Instituto Nacional de TecnologÃa Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina.Fil: Fernández-Vizcaino, E. CSIC. Instituto de Investigación de Recursos Cinegéticos (IREC) SCIC-UCLM; EspañaFil: RuÃz de Arcaute, C. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Soloneski, S. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Brodeur, Julie Celine. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentina. Instituto Nacional de TecnologÃa Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina
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