Abstract
The crystal structure of the anionic zinc-[amino-(iminio)meth-yl]phospho-nate one-dimensional coordination polymer, Zn-AIMP, is reported; the negative charge is balanced by an oxidanium cation (H(3)O(+)) to give the composition {(H(3)O)[Zn(CH(4)N(2)PO(3))(3)]} (n) . The building unit of the coordination polymer comprises a divalent Zn(2+) cation (site symmetry ..) and three [amino(iminio)meth-yl]phospho-nate mono-anionic ligands (point group symmetry m). The AIMP ligand exists in a zwitterionic form with a total charge -1 as the phospho-nate is fully deprotonated (-PO(3) (2-)), while the amino-(iminio)methyl moiety is protonated (H(2)N-C-NH(2) (+)).