The choice of N-phenyl-aza-15-crown-5 of isopolymolybdate and heteropolymolybdotungstate

To study the effect of cyclic compounds on the structure of polyoxometalates, two new supermolecular complexes of [Na(N-Ph)aza-15C5 (Et2O)](2)Na2Mo8O26 (1) and [Na(N-Ph)aza-15C5(Et2O)](2)Na(2)W(0.25)2Mo(7.75)O(26) were synthesized. Their structures were characterized by IR, H-1 NMR, PI,H-COSY and elementary analysis, and determined by fourcircle X-ray diffractometer. The parameters of crystal structure of supermolecule(II) are: monoclinic, space group P2(1)/c, a=1.764 4 (4) nm, b=1.370 2 (3) nm, c=1.450 7 (3) nm, beta=114.02(3)degrees, Z=2. The crystal consists of sodium N-phenyl-aza-15-crown-5 complex cations and two-dimensional network anions of [Na2WxMo8-xO26](infinity)(2-). In comparison with the previous reports, it was found that there were some relationship between the structure of the cyclic compound and the polymerization of the polyoxometalates, and the occupation of the W and Mo atoms, and the distribution of W and Mo atoms in crystal lattice.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000071087500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Chemistry, MultidisciplinarySCI(E)中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)7121911-19161