Ag₃ triangle and Ag₄ rectangle supported by deprotonated aminopyrimidyl derivatives and bis(diphenylphosphino)methane

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• 作者：Di Sun^a ; Na Zhang^a ; Rong-Bin Huang ; ^a ; ^{rbhuang@xmu.edu.cn"" rel=""nofollow} ; Lan-Sun Zheng^a
• 关键词：Silver(I) ; 2-Amino-4 ; 6-dimethylpyrimidine ; 2-Aminopyrimidine ; Bis(diphenylphosphino)methane ; Ag· ; · ; · ; Ag interaction ; Photoluminescence
• 刊名：Inorganic Chemistry Communications
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：14
• 期：6
• 页码：1039-1042
• 全文大小：665 K

文摘

Two new coordination compounds [Ag₆(NHdmpym)₂(dppm)₄] (1·4ClO₄) and [Ag₄(NHpym)₂(dppm)₂] (2·2ClO₄·2DMF) (NH₂dmpym = 2-amino-4, 6-dimethylpyrimidine, NH₂pym = 2-aminopyrimidine, dppm = bis(diphenylphosphino)methane, DMF = N, N-dimethylformamide) have been synthesized under the ammoniacal conditions and structurally characterized. In 1 and 2, NH₂dmpym and NH₂pym ligands are deprotonated and show rare μ₄-N¹:N¹:N² and μ₃-N¹:N² coordination modes, respectively. The bridging dppm ligand combines the N-donor ligands to give 1 and 2 triangle Ag₃ and rectangle Ag₄ cores, respectively. The resulting Ag₃ metallacycle is a scalene triangle with an average Ag···Ag distance of 3.1043(9) Å. The Ag₄ metallacycle is an irregular rectangle with a shorter and a longer Ag···Ag distances of 2.8852(15) and 3.3202(13) Å, respectively. The structural variances between 1 and 2 are caused by the ratios of metal and ligands and substituent group effect. In addition, 1 and 2 exhibit blue photoluminescence which may be assigned to ligand-to-metal charge transfer (LMCT) transition.