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The reaction of Na 2 MoO 4 ·2H 2 O with 2-amino-2-(hydroxymethyl)propane-1,3-diol (LH) in water at room temperature results in the formation of the heterometallic coordination polymer [Mo 2 O 6 L 2 (Na 2 (H 2 O) 4 )]·2H 2 O  1  (L = 2-amino-3-hydroxy-2-(hydroxymethyl)propan-1-olato). The structure of  1  consists of a neutral (Mo 2 O 6 ) unit located on an inversion center. The Mo atoms exhibit hexa-coordination and are bonded to two terminal and two bridging oxido ligands, an alkoxide oxygen and the amine N atoms of an anionic ligand L –  resulting in the formation of an edge-sharing {Mo 2 O 8 N 2 } bioctahedron. The Na +  cations of a centrosymmetric bis(μ 2 -aqua)-bridged (Na 2 (H 2 O) 4 ) 2+  unit are penta-coordinated and bonded to two symmetry related L –  ligands via the oxygen atoms of their OH groups. The µ 3 -bridging tetradentate binding mode of L –  results in the formation of a two-dimensional heterometallic coordination polymer. The constituents of  1  viz. (Mo 2 O 6 ), (L) – , (Na 2 (H 2 O) 4 ) 2+  and lattice water molecules are interlinked with the aid of three varieties of hydrogen bonding interactions. The corresponding tungstate reported recently has been obtained through a similar synthetic protocol and is isostructural.

Synthesis and structural characterization of a new heterometallicmolybdate coordination polymer based on a µ 3 -bridging amino alcohol