首页 | 本学科首页   官方微博 | 高级检索  
     


Silver coordination polymers with remarkably high packing coefficients
Authors:Yutian Wang   Mihaela ?erb  Ulli Englert
Affiliation:(1) Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg. 1, 52074 Aachen, Germany;(2) Department of Inorganic Chemistry, University POLITEHNICA of Bucharest, Polizu 1, 011061 Bucharest, Romania;
Abstract:Silver meso- and rac-tartrate and silver squarate have been synthesized, and the crystal structure of a new polymorph of the latter is reported. Three reaction products of these silver salts with pyrazine have been obtained and structurally characterized: From silver squarate, a chain polymer with linear coordination of Ag(I) by two pyrazine ligands is formed, whereas the silver tartrates yield solids in which the inner coordination sites around the metal are only partially occupied by N donors; in contrast to expectation, oxygen coordination prevails. All the four new Ag(I) coordination compounds reported show high packing coefficients in the range between 0.789 and 0.885. In order to put these results into a meaningful context, packing coefficients for the crystal structures of almost 30,000 compounds retrieved from the Cambridge Structural Database have been determined. Tartrates pack significantly closer than pyrazine complexes or metal-containing compounds in general. The exceptionally high packing coefficient of the new polymorph of silver squarate is due to stacking of anions and concomitant Ag···Ag contacts, both along the shortest lattice parameter which amounts to only 3.3990(9) ?.
Keywords:
本文献已被 SpringerLink 等数据库收录!
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