Detail of "368-90-1"

Reference

Lindqvist-type (aryldiazenido)polyoxomolybdates - synthesis, and structural and spectroscopic characterization of compounds of the type (nBu4N)3[Mo6O18(N2Ar)]

Bustos, Carlos; Hasenknopf, Bernold; Thouvenot, Rene; Vaissermann, Jacqueline; Proust, Anna; Gouzerh, Pierre (Instituto de Quimica, Universidad Austral de Chile, Casilla 567, Valdivia, Chile). European Journal of Inorganic Chemistry, (15), 2757-2766 (English) 2003 Wiley-VCH Verlag GmbH & Co.Several substances are used for example 368-90-1 and 823-85-8 which are their cas registry numbers. KGaA. CODEN: EJICFO. ISSN: 1434-1948. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Section cross-reference(s): 75, 77 Aryldiazenido compds. (Bu4N)3[Mo6O18(N2Ar)] (R = RC6H4 (R = H, p-Me, p-F, p-CN, p-CF3, p-OMe, p-NO2, o-Cl, o-NO2, m-NO2), C6F5, 2,4-dinitrophenyl) were prepd. by treatment of (Bu4N)4[Mo8O26] with the appropriate arylhydrazines in MeCN or in MeOH. All these compds. are isostructural. Two members of the series, the o-nitro and the p-carboxy derivs., were characterized by single-crystal x-ray diffraction. The aryl ring in the 1st anion lies in a mirror plane of the polyoxometalate, while in the 2nd one it is tilted, allowing H bonding between the carboxylic acid function and a neighboring anion. The aryldiazenido ligands exhibit the characteristic features of the singly bent coordination mode with short Mo-N and N-N bond lengths indicative of multiple bond character. The compds. were characterized by 95Mo and 17O NMR spectroscopy in MeCN. Their spectra indicate C4v symmetry, and hence stereochem. nonrigidity in soln. The 95Mo chem. shifts are mainly detd. by variation in the paramagnetic shielding term, spara. The strongly deshielded resonance of the MoII center spans a large range (600-1100 ppm). .