Silver Coordination Chemistry of a New Versatile "Janus"-type N2,O2-Bichelating Donor, Formation of an Unprecedented Supramolecular Network of Binuclear Silver Building Blocks Co

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• 作者：Augusto Cingolani ; Effendy ; Fabio Marchetti ; Claudio Pettinari ; Riccardo Pettinari ; Brian W. Skelton ; and Allan H. White
• 刊名：Inorganic Chemistry
• 出版年：2004
• 出版时间：July 12, 2004
• 年：2004
• 卷：43
• 期：14
• 页码：4387 - 4399
• 全文大小：360K
• 年卷期：v.43,no.14(July 12, 2004)
• ISSN：1520-510X

文摘

Synthetic, spectroscopic, and single-crystal X-ray studies are reported for several complexes of silver(I) with theN₂,O₂-bichelating Q^py ligand (HQ^py = 1-(2-pyridyl)-3-methyl-4-trifluoroacetylpyrazol-5-one). Direct interaction betweenHQ^py and AgNO₃ in methanol, in the presence of NaOCH₃, affords derivative Ag(Q^py), showing a polynuclearstructure composed of dinuclear building blocks with two different Ag environments and two Q^py donors differentlyconnected. By adding neutral ligands such as PR₃ (R = Ph, Cy, C₆H₄-o-CH₃, C₆H₄-p-F, Buⁱ) to Ag(Q^py), dinuclearAg(Q^py)(PR₃) derivatives have been isolated, containing bridging N₂,O-exotridentate Q^py donors spanning a pair ofAgPR₃ moieties. Reaction of Ag(Q^py)(PPh₃) with excess PPh₃ produces the mononuclear Ag(Q^py)(PPh₃)₂ containingN₂-chelate Q^py. Ag(Q^py) interacts with 1,2-bis(diphenylphosphino)ethane (dppe) yielding the derivative Ag(Q^py)(dppe), having a polynuclear structure in the solid state which is seemingly disrupted in solution, with the formationof two new species, a mononuclear neutral compound and a dinuclear ionic one. By the interaction of Ag(Q^py) withnitrogen donors L (L = imidazole (imH), 1-methylimidazole (Meim), 1-methyl-2-mercaptoimidazole (Hmimt), 1,10-phenanthroline (phen)), mononuclear species Ag(Q^py)(L) have been obtained, where Q^py is coordinated to silver inN₂-chelating mode. Ag(Q^py)(PPh₃)₂ reacts with SnRCl₃ (R = Ph, Buⁿ) affording heterotrimetallic [{(Ph₃P)₂AgCl}₂SnRCl₃] derivatives.