苯基氮杂-15-冠-5对钼同多酸以及钨钼杂多酸阴离子的选择  

The Choice of N-Phenyl-aza-15-crown-5 of Isopolymolybdate and Heteropolymolybdotungstate

作　　者：鲁晓明[1] 宗瑞发[1] 刘顺诚[1] 金祥林[2] 刘育[3] 

机构地区：[1]首都师范大学化学系,北京100037 [2]北京大学物理化学研究所,北京100871 [3]南开大学化学系,天津300071

出　　处：《高等学校化学学报》1997年第12期1911-1916,共6页Chemical Journal of Chinese Universities

基　　金：北京市教育委员会基金;北京市科委基金

摘　　要：合成了两种氮杂大环八聚多酸超分子配合物［Na（N-Ph）aza-15C5（Et2O）］2Na2MO8O26（Ⅰ）和［Na（N－Ph）aza－15C5（Et2O）］2Na2Wo25Mo7.75O26（Ⅱ），用元素分析、IR、1HNMR和H，H－COSY谱进行了表征，并用X射线测定了配合物（Ⅱ）的晶体结构．配合物（Ⅱ）属单斜晶系，空间群为P21/c，晶胞参数为：a=1.7644（4）nm，b=1．3702（3）nm，c=1．4507（3）nm，β=114．02（3）°，Z=2．该类晶体由大环金属销配位阳离子和二维阴离子网络［Na2WxMo8-xO26」2-组成，阴、阳离子分层堆积．研究了苯基氮杂-15-冠-5和与之键合的多酸阴离子的结构及相互关系．发现在苯基氮杂-15-冠-5分别与八错多酸和六聚钨错杂多酸反应所得的产物中，多酸阴离子的聚合度均为8．表明大环化合物的结构与阴离子的结构有一定的对应关系．To study the effect of cyclic compounds on the structure of polyoxometalates, twonew supermolecular complexes of [Na (N-Ph)aza-15C5 (Et2O) ]2Na2Mo8O26 (Ⅰ) and [Na (N-Ph ) aza-15C5 (Et2O) ]2Na2W0.25Mo7.75O26 were synthesized. Their structures were character-ized by IR, 1H NMR, H,H-COSY and elementary analysis, and determined by fourcircle X-ray diffractometer. The parameters of crystal structure of supermolecule(Ⅱ) are: monoclin-ic, space group P21/c, a= 1. 764 4(4) nm, b= l. 370 2(3) nm, c= 1. 450 7(3) nm, P=114. 02 (3) o, Z = 2. The crystal consists of sodium N-phenyl-aza-15-crown-5 complex cationsand two-dimensional network anions of LNa2WxMo8-xO26]2-8. In comparison with the previ-ous reports, it was found that there were some relationship between the structure of thecyclic compound and the polymerization of the polyoxometalates, and the occupation of theW and Mo atoms, and the distribution of W and Mo atoms in crystal lattice.

关 键 词：苯基 氮杂冠 配合物 晶体 杂多酸 钼 钨 

分 类 号：O614.612[理学—无机化学] O614.613[理学—化学]