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Figure 2
(a) The hydrogen-bonded layer in the structure of (I)[link], showing a set of three-centre inter­actions between the one-dimensional oxometallate chains (in a polyhedral representation) and bipyrazolium connectors. (b) A projection onto the bc plane, showing the mode of connection of the {(H2Me4bpz)2[Mo8O26]}n layers by water mol­ecules. Note the centrosymmetric aqua–molybdate motif. C-bound H atoms have been omitted for clarity. [Symmetry codes: (ii) −x, −y + 1, −z + 1; (iii) −x, −y, −z; (iv) x + 1, y, z + 1; (v) −x + 1, −y + 1, −z + 2.]

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