教師資料查詢 | 類別: 期刊論文 | 教師: 王文竹WANG, WEN-JWU (瀏覽個人網頁)

標題:Crystal Structures of Benzo-18-Crown-6 Complexes with Oxonium Hexafluorotantalate and Oxonium Hexafluoroniobate
學年95
學期1
出版(發表)日期2006/12/01
作品名稱Crystal Structures of Benzo-18-Crown-6 Complexes with Oxonium Hexafluorotantalate and Oxonium Hexafluoroniobate
作品名稱(其他語言)
著者王文竹
單位淡江大學化學學系
出版者
著錄名稱、卷期、頁數Crystallography Reports 51, pp.804-810
摘要The crystal structures of [(benzo-18-crown-6) · H3O]TaF6 and [(benzo-18-crown-6) · H3O]NbF6 complex compounds are determined by X-ray diffraction. It is revealed that the tantalum complex has two polymorphic modifications, namely, the monoclinic (I) and orthorhombic (II) modifications. The unit cell parameters of these compounds are as follows: a = 14.784(2) Å, b = 8.390(4) Å, c = 18.005(6) Å, β = 95.78(2)°, Z = 4, and space group P21/n for modification I; and a = 8.456(2) Å, b = 21.967(5) Å, c = 24.122(5) Å, Z = 8, and space group Pbca for modification II. The orthorhombic niobium complex [(benzo-18-crown-6) · H3O]NbF6 with the unit cell parameters a = 8.454(1) Å, b = 21.943(3) Å, c = 24.127(4) Å, Z = 8, and space group Pbca (III) is isostructural with tantalum complex II. The oxonium cation in complexes I–III is encapsulated by the crown ether and thus forms one ordinary and two bifurcate hydrogen bonds with the oxygen atoms of the crown ether. This macrocyclic cation is bound to the anions through the C-H ...F contacts (H...F, 2.48–2.58 Å).
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語言英文
ISSN1063-7745;1562-689X
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別俄羅斯
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