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Showing papers by "Jacques E. Guerchais published in 1980"


Journal ArticleDOI
TL;DR: The structure of bis(η5-cyclopentadienyl)peroxochoroniobium(V) has been determined from diffractometer data by X-ray methods; a = 17.81, b = 6.343, c= 26.156 A,β = 138.28°, space group P21/c, Mo-Kα radiation, 3706 indepen reflections with I > 2σ(I) as discussed by the authors.

19 citations


Journal ArticleDOI
TL;DR: The structure of the title compound has been determined by the heavy-atom method from 2 417 reflections, measured with a diffractometer, and refined by full-matrix least-squares methods to R.044 as discussed by the authors.
Abstract: The structure of the title compound has been determined by the heavy-atom method from 2 417 reflections, measured with a diffractometer, and refined by full-matrix least-squares methods to R.0.044. Crystals are monoclinic, space group C2/c, with unit cell dimensions a= 18.55(2), b= 12.43(2), c= 14.17(2)A, and β= 119.1(3)°. In the structure each molybdenum atom has a pentagonal-bipyramidal co-ordination, with the centrosymmetric binuclear anions formed by axially linking two units, through a symmetric fluorine bridge. The Mo–F distance of 2.135 A is very long, due to the trans effect of the oxide ligand (Mo–O 1.659 A) and to the bridging role of the fluorine atom.

15 citations


Journal ArticleDOI
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


Journal ArticleDOI
TL;DR: In this paper, the reaction of niobium, molybdenum or tungsten thiolates with fluoroalkynes was shown to yield substituted vinyl sulphides.

8 citations