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The rearrangement products (3d, 3h, and 3i) were isolated as described above for the Co/f2 isomers.

R. GARTH KIDD and H . GARTH SPINNEY. Can. J . Chem. 59.2940Chem. 59. (1981.The seven hexahaloantimonate anions in the series [SbC&Br,-,I-have been prepared and their antimony-121 nrnr spectra show that for [SbCI4Br2]-. [SbCI,Br,]-, and [SbCI2Br4]-. only the cis isomers are present in acetonitrile solution. The pairwise additivity model for central atom shielding has been used for configuration assignments. Models relevant to the higher incidence of c i~ over trans isomers are discussed. The nuclear shielding of l2ISb is the most sensitive to halogen substitution of all the elements whose halide chemical shifts have been studied. Antimony shieldings exhibit normal halogen dependence, with bromine substitution causing upjeld shifts relative to chlorine substitution. R. GARTH KIDD et H. GARTH SPINNEY. Can. J . Chem. 59, 2940Chem. 59, (1981.On a prepare les sept anions hexahaloantimonates de la serie [SbCI,Br,-,I; leurs spectres rmn du Sb-121 revelent que seuls les isomeres cis des anions [SbCI4Br2]-, [SbCl,Br,] et [SbC12Br4] sont presents en solution dans l'acetonitrile. On a utilise le modele d'additivite par paire du blindage de I'atome central pour attribuer les configurations. On discute de modeles appropries pour expliquer la presence preponderante des isomeres cis sur les isomeres truns. De tous les elements dont on a etudie les deplacements chimiques des halogenes, le blindage nucleaire du SbIZ1 est le plus sensible a la presence des halogenes. L'effet de I'halogene sur le blindage de l'antimoine est normal par rapport au chlore alors que le brome provoque un deplacement vers les champs forts.[Traduit par le journal]

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Various non-metallic derivatives of pentafluorothiophenol, containing sulfur bonded to boron, carbon, silicon, germanium, phosphorus, arsenic, antimony, sulfur, and chlorine, have been prepared, mainly from the reaction of Pb(SC6F5), with a non-metallic halide, and characterized. The 19F n.m.r. spectra have been examined. The coordinating power of sulfur attached to a C6F5 group is minimal.Divers derives non-m6talliques du pentafluorothioph6nol contenant du soufre li6 au bore, au carbone, au silicium, au germanium, au phosphore, A I'arsenic, a I'antimoine, au soufre, et au chlore ont ett prkparb, principalement par reaction de Pb(SC6F,), avec des halogknures non-mktalliques et caractCris6s. Les spectres r.m.n. de 19F ont Bte examines. Le pouvoir de coordination du soufre attach6 a un groupe C6F5 est minimal.