Organically templated linear metal sulfites

Abstract

Organically-templated linear zinc and manganese sulfites have been prepared under mild reaction conditions and structurally characterized by single crystal X-ray diffraction. The linear zinc sulfites, with the compositions, [(C₃H₁₀N)₂][Zn(SO₃)₂], 1, [C₃H₁₂N₂][Zn(SO₃)₂], 2, [C₄H₁₄N₂][Zn(SO₃)₂], 3, [C₆H₁₈N₂][Zn(SO₃)₂], 4 and [C₄H₁₂N₂][Zn(SO₃)₂]·H₂O, 5 possessing chain topologies consist of ZnO₄ tetrahedra and SO₃ pyramidal units forming four-membered rings which are connected through their vertices giving rise to 1D-chain structures. The linear manganese sulfite 6, with the composition [C₄H₁₂N₂][Mn(SO₃)₂(H₂O)₂]·2H₂O has kronkite type topology through corner sharing of four-membered rings formed by the MnO₆ octahedron and SO₃ pyramidal units. In all these structures the amine molecules are sitting between the interchain spaces. The compounds have been characterized by powder X-ray diffraction, infrared spectroscopy and thermogravimetric analysis.