86730-74-7Relevant academic research and scientific papers
SYNTHESIS AND REACTIVITY OF MONO- AND HETERO-NUCLEAR RHODIUM(I) OR IRIDIUM(I) COMPLEXES WITH 2-(2'-PYRIDYL)BENZIMIDAZOLE
Uson, Rafael,Oro, Luis A.,Cabeza, Javier A.
, p. 105 - 116 (1983)
Rhodium(I) and iridium(I) complexes of the formulae M(PyBzIm)(diolefin), ClO4, (diolefin)M(μ-PyBzIm)AuCl, ClO4 (L = PPh3 or P(OMe)3), ClO4 and 2>ClO4 (diolefin = COD or NBD) are described.The related carbonyl derivatives M(PyBzIm)(CO)Y, ClO4 (Y = CO or PPh3), (CO)2M(μ-PyBzIm)AuCl, ClO4, 2>ClO4 and 2>ClO4 have been obtained by reaction of diolefin derivatives with carbon monoxide and triphenylphosphine.
Synthesis and characterization of some monomeric and dimeric silver(I)-phosphine complexes with N-donor bridging ligands
Sarkhel, Prashanta,Bhattacharjee, Suchandra,Sarkhel, Sejuti,Chakraborty, Surajit
, p. 1154 - 1157 (2013/01/14)
The monomeric complexes [Ag(PPh3)2]X (X = ClO 4 - or NO3) was synthesized by a metathesis reaction of [Ag2(PPh3)4(μ-SO4)] with BaX2 (where X = ClO4 - or NO3 -) in ethanol. The reactivity of [Ag(PPh3)2]X (where X = ClO4 - or NO3 -) with some potential N-donor bridging ligands viz. 4,4 bipyridine and pyrazine yielded dimeric complexes of the type [Ag2(PPh3) 4(μ-L-L)]X2 (where L-L = 4,4-bipyridine or pyrazine, and X = ClO4 - or NO3 -). All these complexes were characterized by infrared spectroscopy, conductivity measurements, cyclic voltammetry, 1H NMR, and electronic spectroscopy.
Multinuclear NMR solution studies on complexes of hexakis(pyrazol-1-yl)benzene (hpzb) with Ag(I)
Caballero, Agustín,Guerrero, Ana,Jalón, Félix A.,Manzano, Blanca R.,Claramunt, Rosa M.,Santa María, M. Dolores,Escolástico, Consuelo,Elguero, José
, p. 168 - 174 (2008/10/08)
The reaction of the polydentate N-donor ligand hexakis(pyrazol-1-yl)benzene (hpzb) with AgSbF6/PPh3 or AgClO4PPh3 in a 1:1 ratio leads to the complexes [Ag(PPh3)(hpzb)]SbF6 (1) or [Ag(PPh3)(hpzb)]ClO4 (3). When two or three equivalents of the silver derivatives are used the species [Ag(PPh3)2]X are formed in addition to 1 or 3. In the case of SbF6- the remaining Ag+ competes with AgPPh3+ for coordination to hpzb and the derivative [Ag(hpzb)]SbF6 (2) is also obtained, while in the case of ClO4- the insoluble salt AgClO4 is formed. The same reactions performed with hpzb-15N12 confirmed the presence of the N-donor ligand in 1-3. At room temperature a Ag-P dissociation process is observed for all the derivatives containing Ag-PPh3 fragments. Complexes 1-3 show in solution an intramolecular argentotropic shift that makes the six pyrazolyl rings of the hpzb ligand equivalent on the 1H NMR time scale. When the amount of counteranion present in solution is sufficiently high, an intermediate of lower coordination number (stabilized with the anion) is observed for complexes 1 and 3 in the low temperature 31P NMR spectra in addition to the three-coordinated species. This intermediate is more stable in the case of ClO4- due to the higher coordinating ability of this anion.
31P NMR Study of Active Species for Ethylene Dimerization in ?-Aryl Nickel Complex-AgClO4
Ishimura, Yoshimasa,Maruya, Ken-ichi,Nakamura, Yoshiyuki,Mizoroki, Tsutomu,Ozaki, Atsumu
, p. 818 - 821 (2007/10/02)
and are active for ethylene dimerization in the presence of AgClO4.The activity increases with increase in the amount of AgClO4 and reaches maximum at AgClO4/Ni-complex = 2.Addition of excess AgClO4 leads to marked decrease in activity with but a little decrease with . 31P NMR spectra of the active solution showed new resonance peaks due to and (X' = F, Cl), accompanying formation of AgX (X = Br, Cl) and .Thus the role of AgClO4 is to abstract halide anion and/or triphenylphosphine.The amount of is in good correlation with the rate of dimerization, which suggests this species to be catalytically active.
