The first observation of γ-octamolybdate: synthesis, crystal and molecular structure of [Me₃N(CH₂)₆NMe₃]₂[Mo₈O₂₆]·2H₂O

Polyoxo Anions: Synthesis and Structure

“…23 An intermediate in this mechanism was a g-structure, which was later isolated by Cruywagen and co-workers. 24 Other potential intermediates, the so-called a-g and b-g structures, are closely related to the observed d-structure. The final structures listed in Table 2, e and x, have been isolated from hydrothermal processes and appear to be controlled by the coordination demands of the lattice or the countercations.…”

Synthesis and Characterization of a Novel Organic/Inorganic Hybrid Based on Octamolybdates and Benzimidazole Molecules [Hbenzimi]4 [(benzimi)2Mo8O26] · 2H2O (benzimi = benzimidazole)

“…The benzimidazole ligands directly modified the surface of octamolybdate clusters via MoAN bonds. The MoAN distance is 2.214(4) and the OAMoAN angles range from 78.06° (13) to 159.38° (14). Compound (1) can also be described as two centrosymmetric related cyclic {(benzimid)-Mo 4 O 13 } units that are cross-linked by bridging oxygen atoms [20].…”

“…To date, eight isomeric forms of octamolybdates have been prepared, that is, a-isomer, b-isomer, c-isomer, d-isomer, e-isomer, n-isomer, g-isomer, and h-isomer. The eight isomeric structures differ in the number, type, and fusion mode of the molybdenum polyhedron [11][12][13][14][15][16][17]. Many organic/ inorganic hybrid octamolybdates that were modified structurally by various organic ligands have been successfully reported and exhibited a rich structure of chemistry, in which the organic templates act as counter cations or structural filling components [17][18][19].…”

Structural Variation in Polyoxomolybdate Hybrid Crystals Comprising Ionic-Liquid Surfactants

“…Suitable crystals of C 12 im-Na-Mo 8 were obtained from ethanol solution under the presence of Na + or Li + , while C 12 im-β-Mo 8 without Na + was crystallized from acetonitrile [29]. (Figure 3a) [38][39][40][41]. The dissolved β-Mo 8 from as-prepared C 12 im-Mo 8 reacted with ethanol to isomerize into ethoxo-grafted γ-Mo 8 anions, which reprecipitated as C 12 im-γ-Mo 8 crystals.…”