Showing papers in "Polyhedron in 1992"

TL;DR: In this paper, the authors present a globale de travaux concernant l'oxydation de l'acide ascorbique par des ions de metaux de transitiion.

TL;DR: A review of the excited-state acidity of inorganic compounds can be found in this paper, where the authors focus on the evaluation of excited state pK, values, and to a lesser extent on the kinetics of the protonation process of ruthenium polypyridyl complexes.

TL;DR: In this paper, the properties of these compounds have been characterized by NMR, IR and mass spectroscopy, while the structures of 1, 2 and 3 have been confirmed by X-ray crystallography.

TL;DR: The X-ray crystal structure of N,N-diethyldiselenocarbamatocadmium(II) has been determined and contains centrosymmetric, dimeric molecular units of [Cd2(Se2 CNEt2)4] with five-coordinated distorted square pyramidal cadmium as discussed by the authors.

TL;DR: The X-ray crystal structures of [diethyl(2-methylthio-3-pyridinecarboxylato)tin oxide (1a) and diethyltin bis(2methylthIO-3 pyridine carboxylate) (1b) were determined in this article.

TL;DR: In this paper, the discriminatory power of dialysis, ion exchange and membrane filtration techniques to identify hydroxyaluminosilicate (HAS) formation in solutions of nearphysiological aluminium concentration has been tested.

TL;DR: From the reaction of fluorinated alcohols with metal tri-(bis-trimethylsilylamides) [M{N(SiMe 3 ) 2 } 3 ] (M  Sc, Y, La or Pr) in benzene, thf or diethyl ether, volatile compounds of formulae [M(OR') 3 (NH 3 ) x ] (X = 0.33 or 0.5) have been isolated.

TL;DR: In this article, a series of new donor-acceptor compounds of the form (η-C 5 H 5 )Fe( η-c 5 H 4 ) CHCHR, where R is a π- acceptor group and the ferrocenyl moiety is a donor has been synthesized.

TL;DR: In this paper, the influence of the CuII: bpy ratio (x) on the identity of the reaction products has been investigated, and values of x in the 1-2 range have been employed.

TL;DR: In this article, the tetranuclear complex Ba4(thd)8 (I) was isolated using Hthd, containing a small amount of pivalic acid, and a new bichelating coordination mode of β-diketonate ligands was found.

TL;DR: Ruthenium(II) complexes of 2,2′:6′,2″-terpyridine have not been widely investigated as photocatalysts; the introduction of electron-withdrawing substituents into the 4′-position of the ligand results in complexes [Ru(Xtpy)2]2+ (xtpy = Cltpy or MeSO2tpy), which luminesce in fluid solution at room temperature.

TL;DR: In this article, a series of tridentate ligands of the type [2,6-bis(benz-X-azol-2-yl)pyridine] (X = imid, thi, ox) have been prepared.

TL;DR: A new imidazolate bridged Cu 2+, Zn 2+ binuclear complex [(dtma) CuImZn (dtma)]ClO 4 · 2.5H 2 O taken as an active site model for Cu,Zn-SOD has been synthesized and its crystal structure has been determined as mentioned in this paper.

TL;DR: In this article, RuIIIX2(AsPh3)2(HL) and AsPh32(H2O2)2 (HL) complexes are characterized by spectroscopic techniques and investigated by cyclic voltammetry, and the ruthenium(III) complexes were found to be effective catalysts for oxidation of primary alcohols to aldehydes.

TL;DR: Ba(thd)2 (1) (thd = 2,2,6,6-tetramethyl-3,5-heptanedionate) has been synthesized by reacting Hthd both with barium metal and with Barium isopropoxide as discussed by the authors.

TL;DR: In this paper, a series of nonelectrolytic low-spin ruthenium(III) complexes were synthesized using closely-related encapsulating Schiff-base ligands having an aliphatic nitrogen and a phenolate oxygen as donor sites.

TL;DR: Quaterpyridine (qtpy) forms double-helical binuclear complexes with metal ions adopting a pseudo-tetrahedral geometry; the role of the substituents is not to control the assembly of the helix, but to control its pitch as discussed by the authors.

TL;DR: In this article, the preparation and X-ray crystal structure of cadmium(II) bis(tri-tert-butoxysilanethiolate) from tri-TERT butoxysilaneethiol and Cadmium acetate are described.

TL;DR: The X-ray crystal structure of the complex [Ni2(TPHA)(bpy)4]-ClO4)2 (TPHA = terephthalato, bpy = 2,2′-bipyridine) has been determined as discussed by the authors.

TL;DR: As4Se4 and As4Se3 do not retain their solid-state structures in solution as mentioned in this paper and the As2Se62− ion resembles a basket with AsSe exocyclic bonds being the handles.

TL;DR: In this paper, the 119Sn NMR spectra were used to investigate the aquohalostannate (IV) complexes formed by SnCl4 and SnBr4 in aqueous and halogen acid solutions, where the NMR data yielded quantitative estimates of the amounts of the various species in solution as a function of the tin concentration from 0.1 mol dm−3, to near saturation where auto-complexing results in complex anion formation.

TL;DR: In this paper, the stability constants for the 1 : 1 lead complexes [L1, log β 6.0(1); L2, log α 8.4(1)] have been determined potentiometrically (0.1 M NEt4ClO4, 95% methanol).

TL;DR: In this article, a single crystal X-ray structure of the title complex of molybdenum has been presented, which reveals that the molecule possesses the usual cis-MoO22+ core and that the ligand SAIH is present as a tridentate donor coordinating through ONO.

TL;DR: In this paper, a Schiff base complex of formulations (η -p-cymene)RuCl(C5H4N-2-CH=NC6H4-p-X)](ClO4) and [(η 6p-cyclmene]RuCl2]2] were prepared by reacting with corresponding pyridine-2 carboxaldimines and sodium salts of salicylaldimine in dry THF, respectively.

TL;DR: In this article, the synthesis of 3-hydroxypyridin-2-one (dhpH) and 1,2-dimethyl-3-hexypyrin-4-one(dmpH) complexes has been reported.

TL;DR: The triflate complexes [Pd(OTf)2L2] (L 2 = dppm, dppe, dppp) and [PtCl2(dppp)] are prepared by reaction of the corresponding chloride with methyl triflated as mentioned in this paper.

TL;DR: In this article, the interaction of trans -RuCl 2 (PMe 3 ) 4 and Li(2,6-Pr i 2 C 6 H 3 N) 2 Ru(PMe3 ) 2 has been shown to have a planar structure by X-ray diffraction study.

TL;DR: Two mixed-ligand complexes of copper(II) azide with substituted pyridines, namely catena-di-μ(1,3)-azido[di-m1,1)-zido-tetrakis(3-picoline)dicopper(II)] (1) and catenadi-mi-m 1,1-1-zido[m 1.1]-azido-bis(2-bromopyridine)-dicoppers(2.5) have been synthesized and characterized by X

TL;DR: In this article, ten water-soluble gallium(III) complexes of N-heterocycles were synthesized and characterized by elemental analysis, conductivity measurements, IR spectroscopy, and optical activity measurements.

TL;DR: In this article, the 16-electron complex Re(Re(DPPBT)3] (I) was shown to have similar distortions from ideal geometry due to intraligand interactions, and was further studied by cyclic voltammetry and UV-vis spectroscopy.