Structural Variations in Bipyridine Silver(I) Complexes: Role of the Substituents and Counterions

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• 作者：Anna Bellusci ; Alessandra Crispini ; Daniela Pucci ; Elisabeta I. Szerb ; Mauro Ghedini
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：August 2008
• 年：2008
• 卷：8
• 期：8
• 页码：3114-3122
• 全文大小：333K
• 年卷期：v.8,no.8(August 2008)
• ISSN：1528-7505

文摘

4,4′-Disubstituted-2,2′-bipyridines have been used for the generation of various Ag(I) derivatives, where the nature of the counteranions in the reacting Ag(I) salt, such as NO₃⁻, ClO₄⁻ and Sac (saccharinate, C₇H₄NO₃S⁻), plays a fundamental role in the stoichiometry of the reaction, dictating the ligand/metal ratio in the fulfilling of the Ag(I) coordination sphere. A competition between the anion coordinating capabilities and its shape and dimension led to only neutral and only ionic derivatives with saccharinate and perchlorate salts (ligand/metal ratios 1:1, 3:2 and 2:1: [(L1)Ag(Sac)], [(L1)₃Ag₂](ClO₄)₂ and [(L1)₂Ag](ClO₄), while 1:1 and 2:1 species formed when the nitrate was used ([(L1)Ag(NO₃)]_∞ and [(L1)₂Ag](NO₃). Moreover, from the systematic structural investigation conducted on the crystalline solid state of the new Ag(I) complexes, it became clear that the presence of 4,4′-substituents on the bypiridine framework is a further significant factor in both the reciprocal combination between ligand and metal ion and the construction of their supramolecular organizations.