Author
Jacques E. Guerchais
Bio: Jacques E. Guerchais is an academic researcher from University of Western Brittany. The author has contributed to research in topics: Crystal structure & Cyclopentadienyl complex. The author has an hindex of 15, co-authored 83 publications receiving 799 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the electronic properties of the bridging thiolato-group and the metal centres are discussed in terms of the spectroscopic parameters of the complexes and crystal-structure analyses.
Abstract: The action of heat on [(η5-C5H5)(OC)3M(µ-SR)M′(CO)5](1)(M or M′= Cr, Mo, or W; R = Me or Ph) gives [(η5-C5H5)(OC)2[graphic omitted](CO)5](2) containing a metal–metal bond. Photolysis of (2) in the presence of carbon monoxide regenerates (1) in an example of reversible cleavage of a M–M bond by carbon monoxide. The octacarbonyls (1) react with hexafluorobut-2-yne to give products of substitution at the (η5-C5H6) M group. The spectroscopic parameters of the complexes and crystal-structure analyses of (1a; M = M′= W, R = Me), (2b; M = Mo, M′= W, R = Me), and [(η5-C5H5)(OC)(CF3C2CF3)W(µ-SMe)W(CO)5](5) are discussed in terms of the electronic properties of the bridging thiolato-group and the metal centres.
14 citations
TL;DR: The reaction of (η 5 -C 5 H 5 ) 2 NbCl 2 with P 4 S 10 in an alcohol ROH affords two types of compounds: (1) paramagnetic niobium(IV) complexes formulated as [(η5 -C5 H 5 ] 2 nb[S 2 P(OR) 2 ]] + PF − 6 ] as discussed by the authors.
13 citations
TL;DR: In this paper, the structure of diamagnetic niobium derivatives has been determined by single-crystal X-ray diffraction Crystal data are space group P21/n, a 7983(2) A, b 27600(7) A.
13 citations
TL;DR: The structure of the title compound has been determined by the heavy-atom method from 1 267 reflections, measured with a diffractometer, and refined by full-matrix least-squares methods to R 0.069.
Abstract: The structure of the title compound has been determined by the heavy-atom method from 1 267 reflections, measured with a diffractometer, and refined by full-matrix least-squares methods to R 0.069. Crystals are monoclinic, space group P21/n, a= 8.57(1), b= 13.68(2), c= 11.79(2)A, β= 96.1 (1)°, Z= 2. In the structure two tetraethylammonium ions counterbalance each [Ta2OF10]2– complex anion in which the two tantalum atoms are bridged by an oxygen atom (Ta–O 1.875 A; Ta–O–Ta 180° by symmetry); the five remaining octahedral sites around each tantalum atom are occupied by fluorine atoms (mean Ta–F 1.90 A).
12 citations
TL;DR: In this paper, neutral cationic complexes were formed from [Nb(η-C5H5)2(Bu)[η2-CS2]-(1) and RX (R = Me, Et, i-Pr, CH2COOEt; X = I).
12 citations
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TL;DR: The factor that controls the activity of these chelates is not fully understood but parameters such as redox potentials of the metal and electronic structure appear to be crucial as discussed by the authors.
499 citations
TL;DR: The reaction chemistry of nitriles with transition metal complexes is reviewed in this paper, where the authors survey data published during the period 1977-early 1994 on new reaction processes such as insertion into metal-hydrogen and carbon bonds, coupling between one nitrile and an unsaturated metal fragment, reduction to amines, attack by protic and aprotic nucleophiles and electrophilic attack as well as some catalytic transformations.
427 citations
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425 citations
TL;DR: In this article, a spectroscopic and structural investigation of binuclear silver(I) complexes supported by aliphatic phosphine ligands, namely [Ag(PCy3)(O2CCF3)]2 (1), [Ag2(μ-dcpm)2]X2 (X = CF3SO3, 2; PF6, 3; dcpm = bis(dicyclohexylphosphino)methane), and [Ag 2(mdcpm)(μ-O2ccF3] (4), is described.
Abstract: A spectroscopic and structural investigation of binuclear silver(I) complexes supported by aliphatic phosphine ligands, namely [Ag(PCy3)(O2CCF3)]2 (1), [Ag2(μ-dcpm)2]X2 (X = CF3SO3, 2; PF6, 3; dcpm = bis(dicyclohexylphosphino)methane), and [Ag2(μ-dcpm)(μ-O2CCF3)2] (4), is described. X-ray structural analyses of 1−4 reveal Ag−Ag separations of 3.095(1), 2.948 (av), 2.923 (av), and 2.8892(9) A, respectively. Due to the optical transparency of the phosphine ligands, the UV−vis absorption band at 261 nm in CH3CN for 2 and 3 is assigned to a 4dσ* → 5pσ transition originating from Ag(I)−Ag(I) interactions. The argentophilic nature of this band is verified by the resonance Raman spectrum of 2 with 273.9 nm excitation, where virtually all of the Raman intensity appears in the Ag−Ag stretch fundamental (80 cm-1) and overtone bands. Complexes 2 and 3 exhibit photoluminescence in the solid state at room temperature.
315 citations
310 citations