The synthesis and crystal structure of crown ether with heterohexaoxometalate supermolecular complexes

Two new supermolecular complexes of [Na(DB18C6)(CH3OH)]2W4Mo2O19.(DB18C6).(CH3OH)(I) and [Na(DE24C8)]2W1Mo5O19 (II) vrcre synthesized, their structures were characterized by IR, H-1 NMR and elementary analysis, and also determined by fourcircle X-ray diffractometer. The parameters of crystal structure of complex(I) are: space group P2(1)/c, a=1.869 9(5) nm, b=1.954 3(5) nm, c=2.280 8(6) nm, beta=112.87 degrees, Z=4, It was shown that the formation of the two complexes is in different ways- DB18C6 is linked to polyoxometalate anion through C-O-Na-O-M (M=W or Mo) long distant bonds, but DB24C8 with Na+ combined with anion by electronic Interaction. It was also found that the crown ether with different radii of cavity selected different heterohexaoxometalate in which the occupation of W and Mo is different to coordinate.