A Novel Three‐dimensional Framework with Tunnels Based on the Cobalt‐containing Molybdenum Phosphate Moieties

A novel compound (H2en)5[CoMo12O50P8(OH)12] ·2H2O (1) (en = H2NCH2CH2NH2) has been hydrothermally synthesized and characterized by elemental analyses, IR, EPR, XPS spectra and single-crystal X-ray diffraction analyses. Compound 1 crystallizes in a triclinic system, space group Pi, with a = 1.1863(2) nm, b = 1.3361(3) nm, c = 1.3783(3) nm, a = 88.13(3)°, β = 70.09(3)°, γ = 65.24(3)°, V = 1.8497(6) mn3, and R = 0.0417. The basic building blocks of compound 1 are|Mo6P4 [clusters forming dimers through the|CoO6] octahedra. Compound 1 exhibits an unusual three-dimensional framework with tunnels owing to the extensive hydrogen bonding interactions between the dimers and H2en.