In situ synthesis of an inorganic-organic hybrid based on a molybdenum-oxo chain: [Cu ₂(pz)(Mo ₃O ₁₀)] _n

A polyoxomolybdate, [Cu ₂(pz)(Mo ₃O ₁₀)] _n (pz=pyrazine) (1), has been synthesized hydrothermally and characterized by elemental analysis, IR, X-ray photoelectron spectra, and thermogravimetric analysis. Single-crystal X-ray diffraction demonstrates that 1 has a 3-D architecture constructed by combination of {Mo ₃O ₁₀} units and [Cu ₂(pz)] ²⁺. All the terminal oxygen atoms of the polyoxomolybdate are coordinated by univalent copper. Pyrazine came from in situ decarboxylation of 2-pyrazinecarboxylic acid and Cu ⁺ from the in situ reduction of Cu ²⁺ during the hydrothermal synthesis.