Reactions of bis(acetylacetonato)dioxomolybdenum(VI) with aroylhydrazines. Structure and 1H NMR Spectrum of 3,5-dimethylpyrazolium β-octamolybdate tetrahydrate

Redetermination of the crystal structure of 3,5-dimethylpyrazolium β-octamolybdate tetrahydrate

“…1). This feature was not disclosed in the previous structural determination by FitzRoy et al (1989). val.…”

“…The title compound, (C 5 H 9 N 2 ) 4 [Mo 8 O 26 ] . 4(H 2 O), was previously reported by FitzRoy et al (1989). Besides the fact that the authors did not fully elucidate the hydrogen bonding network of this material (hydrogen atoms were placed geometrically) and that only the metallic centers could be refined anisotropically (from a room-temperature determination), the unit cell parameters reported in the main text and in the abstract do not match (viz.…”

“…For the previous determination of the title compound at room temperature (Cambridge Structural Database refcode: JAMFEI), see: FitzRoy et al (1989). For a description of the Cambridge Structural Database, see: Groom & Allen (2014).…”

An unusual Li-Na-β-octamolybdate(VI) sandwiched by dinuclear organomolybdenum(V) units

“…b-Octamolybdate flanked by, e.g., two{M(NN)} units (M=Cu, NN = o-phenanthroline, bipyridine [19]; M=Ni, NN=o-phenanthroline [20]; M=Co, NN = bipyridine [21]; M=Ag, NN = bipyridine, phenazine [22]) have been described. and 2.001-2.455 Å (multiply bridging oxo trans to terminal oxo groups), which compares to the ranges observed in other octamolybdates [17][18][19][20][21][22][23]. Selected Mo-to-ligand bond lengths and distances for 2b are compiled in Table 1 Bonding parameters involving Li + and Na + are provided in Table 2.…”

Crystal structure and bonding of tetrakis(tert-butylammonium) β-octamolybdate(VI) hexahydrate

“…Crystal structure determination of this compound has been carried out between 1972 and 1977 by different authors (Atovmyan and Krasochka, 1972;Gatehouse, 1977 andVivier et al, 1977) with very good agreement of their results. Other examples of salts of the /?-octamolybdate anion the structures of which have been solved are Na 2 [N(CH 3 ) 4 ] 2 [Mo 8 0 26 ] ' 2H 2 0 (Fuchs and Knöpnadel, 1982) (HC 3 H 5 N 7 ) 4 [Mo 8 0 26 ] (Kroenke et al, 1983) and recently the preparation and crystal structures of [(CH 3 ) 2 NH 2 ] 4 [Mo 8 0 26 ] (Piggot et al, 1988) and (HC 5 H 8 N 2 ) 4 [Mo 8 0 26 ] · 4 H 2 0 (Fitzroy et al, 1989) have been published. The first organoammonium or amine /J-octamolybdate to have its crystal structure determined was the compound 3-ethylpyridinium jS-octamolybdate (Román et al, 1981).…”