Synthesis and Structure of a Three‐dimensional Organically Templated Zinc Ethylenediphosphonate, [NH₃(CH₂)₂NH₃][Zn₃{O₃P(CH₂)₂}₄]

Abstract

Abstract A hydrothermal reaction of a mixture of ZnO, HCl, ethylenediphosphonic acid, ethylenediamine, acetic acid in a water, THF mixture gave rise to a new three‐dimensional zinc ethylenediphosphonate, [NH 3 (CH 2 ) 2 NH 3 ][Zn 3 {O 3 P(CH 2 ) 2 } 4 ], I . The structure, determined by single crystal X‐ray diffraction, (monoclinic, space group = C2/c, a = 16.9948(14), b = 6.7383(6), c = 16.8886(14)Å, β = 1113.568(1)°, V = 1772.7(3)Å 3 , Z = 4, R 1 = 0.0227, wR 2 = 0.0601), consists of a network of strictly alternating ZnO 4 and PO 3 C tetrahedral units linked through their vertices forming the three‐dimensional structure. The amine molecules occupy the middle of the 8‐membered channels and interact with the framework through the hydrogen bonds. Unlike other zinc diphosphonates, I appear to have close similarity to zinc phosphate structures reported in the literature. To our knowledge, this is the first three‐dimensional zinc diphosphonate prepared in the presence of an organic amine molecule.