Hydrothermal synthesis and structure of a bi-capped 1D chain (H2en)3H3O[Mo8V4O36(VO4)(VO)2]·4H2O

The title compound, (H2en)3H3O[Mo8V4O36(VO4)(VO)2]·4H2O, was hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction. The crystal data: monoclinic, P21/c, a=19.804(4) Å, b=20.634(4) Å, c=11.920(2) Å, β=94.76(3)°. X-ray crystallographic study showed that the crystal structure was constructed by bi-capped α-Keggin fragment {Mo8V7O42} units linked together by V–O–V bonds to a chain.