Hydrothermal synthesis and structural characterization of novel organically templated zincophosphites: [H2mpipe] · [Zn3(HPO3)4] and [H2en]1.5 · [Zn4.5(HPO3)6] (mpipe = 1-methylpiperazine and en = ethylenediamine)

Two novel zincophosphites, [H2mpipe] · [Zn3(HPO3)4] and [H2en]1.5 · [Zn4.5(HPO3)6], were synthesized and characterized by single-crystal X-ray diffraction. [H2mpipe] · [Zn3(HPO3)4] possesses novel double 4-membered ring chains and [H2en]1.5 · [Zn4.5(HPO3)6] contains simple 4-membered ring chains, which are linked in an ABA-ABA sequence. Two zincophosphites, having three-dimensional structures with 8-membered ring channels, were also characterized by IR spectroscopy, thermogravimetric and differential thermal analyses, and 31P MAS NMR spectroscopy.