文摘
Hydrothermal reactions of N-(phosphonomethyl)-N-methylglycine,MeN(CH2CO2H)(CH2PO3H2) (H3L), with zinc(II) acetate resulted inthe formation of a novel zinc carboxylate-phosphonate, {Zn6L6(Zn)}{Zn(H2O)6}2·22H2O (1). The structure of 1 contains aheptanuclear zinc phosphonate cluster anion, {Zn6L6(Zn)}4-, inwhich seven zinc(II) cations form an unusual Zn6(Zn) centeredoctahedron with six of its Zn3 triangle faces each further cappedby a phosphonate group. The Zn(II) cations of the Zn6 octahedronare five-coordinated whereas the centered Zn(II) cation is octahedrally coordinated. Packing of these cluster anions createsmicropores occupied by the hydrated zinc(II) cations as well aslattice water molecules. The structural skeleton of 1 is retainedafter the removal of the lattice water molecules.