首页 | 本学科首页   官方微博 | 高级检索  
     


Complexes of Lanthanide Nitrates with Alkyl Esters of Bromomethylenediphosphonic Acid
Authors:Vladislav Arabadzhiev  Galin Petrov  Erhard T. K. Haupt
Affiliation:1. Department of Chemistry , Sofia University , Sofia, Bulgaria;2. Department Chemistry , Institute of Inorganic and Applied Chemistry, University of Hamburg , Hamburg, Federal Republic of Germany
Abstract:Complexes of lanthanide nitrates (La, Ce, Sm, Gd, Er, and Yb) with tetraethyl and tetraisopropyl esters of bromomethylenediphosphonic acid were prepared. The complexes were characterized by elemental analysis, IR spectroscopy, and, in some cases, NMR. The data confirm that diphosphonates coordinate with two P[dbnd]O groups, and there are no indications for the existence of noncoordinated P[dbnd]O groups. The structure of the complexes depends only on the ionic radius of the central metal atom and not on changes in the electronic or steric behavior of the ester groups. For the complexes of La, Ce, Sm, and Gd nitrates, the formula is LnL2(NO3)3, and for Er and Yb nitrates it is Ln2L3(NO3)6 (Ln[dbnd]La, Ce, Sm, Gd, Er, Yb; L = diphosphonate).
Keywords:Complexes  esters of bromomethylenediphosphonic acid  lanthanide nitrates
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号