Key indicatorsSingle-crystal X-ray study T = 173 K Mean (C-C) = 0.003 Å R factor = 0.040 wR factor = 0.110 Data-to-parameter ratio = 14.4For details of how these key indicators were automatically derived from the article, see

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A novel polyoxomolybdate (C 14 H 16 N 2) 3 (C 14 H 17 N 2) 2 [β-Mo 8 O 26 ](1) has been synthesized from hydrothermal reaction of tolidine and molybdenum trioxide in water and characterized by its IR and UV spectra, 1 H NMR, cyclic voltammetry and single crystal X-ray diffraction. Compound 1 crystallizes in the triclinic crystal system, space group Pī, with the crystal cell parameters of a=11.5360 Å, b=11.6080 Å, c=15.2520 Å, α=72.50 • , β=79.46 • , γ =86.91 • , V =1915.00 Å 3 and Z=1. The asymmetric unit of the crystal structure of (C 14 H 16 N 2) 3 (C 14 H 17 N 2) 2 [β-Mo 8 O 26 ] contains β-octamolybdate [β-Mo 8 O 26 ] 4− anions, two tolidine molecules and shows the presence of monoprotonated tolidine cations. One tolidine molecule and a β-Mo 8 O 26 polyanions species lie across crystallographic inversion centres while the two tolidine molecules occupy general sites.