JOURNAL of the Tunisian Chemical Society

The title compound, 2-amino-5-chloropyridin β-octamolybdate(VI), (C₅H₆ClN₂)₄[Mo₈O₂₆], was produced by hydrothermal reaction of an acidified aqueous solution of NH₄Mo₇O₂₄.4H₂O and 2-amino-5-chloropyridin (hereafter L). This new material has been characterized by M.E.B. and I.R. absorption spectroscopy. Its structure is determined by single crystal X-ray diffraction. It crystallizes in triclinic system with P-1 space group. The parameters are: a = 9.719(3) Å; b = 10.744(5) Å; c = 12.235(7) Å; α = 92.47(4)°; β = 102.14(4)°; γ = 116.57(4)° and Z = 1. The structure is characterized by β-[Mo₈O₂₆]^4- polyanions that consist of eight MoO₆ edge-sharing octahedra. The Mo-Mo distances are in range 3.301(2) - 4.163(2) Å while the four types of Mo-O bond lengths are in range 1.694(5) – 2.444(4) Å. An extensive hydrogen-bonding network N-H…O stabilizes the crystal structure.

M. Driss, F. Ben Amor, M.F. Zid

Hybrid complex, β-octamolybdate, structure

Pages 189-200