نتایج جستجو برای: palladium pd

تعداد نتایج: 67611  

2012
Alfred Muller Cedric W. Holzapfel

The title compound, [(μ2-CO3){Pd(P(t-C4H9)2(C12H8)}2]·CH2Cl2, the first CO3-bridged palladium dimer complex reported to date, was obtained while preparing the Pd(0) complex with (2-biphen-yl)P( (t) Bu)2. In the crystal, each palladium dimer is accompanied by a dichloro-methane solvent mol-ecule. Coordination of the carbonate and chelated phosphane ligands gives distorted square-planar environme...

Journal: :Dalton transactions 2014
Michael G Burgess M Naveed Zafar Stephen T Horner George R Clark L James Wright

Double aza-Michael addition of n-butylamine to the two acrylamide groups of acyclic N(2),N(6)-bis(6-acrylamidopyridin-2-yl)pyridine-2,6-dicarboxamide gives the corresponding macrocycle, H₄L. H₄L has potential coordination pockets associated with the 2,6-dicarboxamide (head) and the butylamine (tail) regions of the macrocycle. Depending on the conditions employed, macrocyclic complexes with pall...

2013
Wilfredo Hernández Juan Paz Fernando Carrasco Abraham Vaisberg Evgenia Spodine Jorge Manzur Lothar Hennig Joachim Sieler Steffen Blaurock Lothar Beyer

The palladium(II) bis-chelate complexes of the type [Pd(TSC(1-5))2] (6-10), with their corresponding ligands 4-phenyl-1-(acetone)-thiosemicarbazone, HTSC(1) (1), 4-phenyl-1-(2'-chloro-benzaldehyde)-thiosemicarbazone, HTSC(2) (2), 4-phenyl-1-(3'-hydroxy-benzaldehyde)-thiosemicarbazone, HTSC(3) (3), 4-phenyl-1-(2'-naphthaldehyde)-thiosemicarbazone, HTSC(4) (4), and 4-phenyl-1-(1'-nitro-2'-naphtha...

2003
H. Yamada

The controlled out-diffusion method was employed to induce a nuclear reaction in a palladium (Pd) plate with a MnOx film. The time-resolved mass spectra for Pd deuteride revealed tritium (T) production during the outdiffusion experiment. Similar time behaviors of mass number 1-4 and 6 in the spectra was also observed for Pd hydride. Film blackening was observed for most Pd deuteride as well as ...

Journal: :Organic & biomolecular chemistry 2011
Habib Firouzabadi Nasser Iranpoor Arash Ghaderi

Palladium nanoparticles were deposited and reduced by gelatin as a safe edible, naturally occurring and cheap support. No extra reducing agents were used for the generation of Pd(0) nanoparticles from the Pd(II) salt. The nanoparticles of Pd supported on gelatin were characterized by SEM, TEM and AFM images, UV-Vis and XRD spectra and the amount of palladium entrapped in the gelatin was measure...

Journal: :Journal of the American Chemical Society 2004
Connie C Lu Jonas C Peters

A zwitterionic palladium complex [[Ph(2)BP(2)]Pd(THF)(2)][OTf] (1) (where [Ph(2)BP(2)] = [Ph(2)B(CH(2)PPh(2))(2)](-)) reacts with trialkylamines to activate a C-H bond adjacent to the amine N atom, thereby producing iminium adduct complexes [Ph(2)BP(2)]Pd(N,C:eta(2)-NR(2)CHR'). In all cases examined the amine activation process is selective for the secondary C-H bond position adjacent to the N ...

Journal: :Catalysts 2021

Previously tested 2 wt % palladium-platinum catalysts supported on Norit activated carbon preheated to 1600 °C have been reinvestigated in CHFCl2 hydrodechlorination. An additionally adopted catalyst oxidation at 350–400 produced nearly an order of magnitude increase the turnover frequency Pd/C, from 4.1 × 10−4 2.63 10−3 s−1. This is not caused by changes metal dispersion or possible decontamin...

Journal: :SSRG international journal of materials science and engineering 2022

Series of alkali and alkaline earth promi=oted palladium-alumina (Pd/Al2O3) catalysts were synthesised by incipient wetness method using palladium acetate dissolved in acetonitrile as a precursor for palladium. The dispersion on the catalyst surface was calculated from chemisorption CO molecule. tested under vapour phase hydrogenation phenol to cyclohexanone down-flow reactor at atmospheric pre...

1996
Chen Xu

The adsorption and reaction of formic acid, HCOOH, on monolayer and multilayer palladium supported on a Mo(110) surface have been studied using temperature-programmed desorption (TPD) and high-resolution electron energy loss spectroscopy (HREELS). On multilayer palladium, formic acid adsorbs molecularly at 100 K and desorbs primarily intact upon heating to 200 K. A small amount of the adsorbed ...

Journal: :Journal of the American Chemical Society 2004
Brian V Popp Joseph L Thorman Christine M Morales Clark R Landis Shannon S Stahl

The mechanism of olefin substitution at palladium(0) has been studied, and the results provide unique insights into the fundamental reactivity of electron-rich late transition metals. A systematic series of bathocuproine-palladium(0) complexes bearing trans-beta-nitrostyrene ligands (ns(X) = X-C(6)H(4)CH=CHNO(2); X = OCH(3), CH(3), H, Br, CF(3)), (bc)Pd(0)ns(X) (3(X)), was prepared and characte...

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