Syntheses and crystal structures of linear coordinated complexes of Ag with the ligands C(PPh3)2 and (HC{PPh3}2) |
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Authors: | Wolfgang Petz Florian
xler Bernhard Neumüller |
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Institution: | aFachbereich Chemie der Philipps-Universität, D-35032 Marburg, Germany |
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Abstract: | The cationic complexes ({Ph3P}2C)Ag(C{PPh3}2)]X (2+, X = Cl, BF4) with a linear arrangement of the ligands were obtained from the reaction of C(PPh3)2 (1) with the appropriate AgX in THF. The 31P NMR spectrum of the cation 2+ exhibits a doublet with J(Ag,P) = 15.3 Hz. The cation was also formed when the adduct O2C ← 1 was allowed to react with AgX in CH2Cl2 in the first step as shown by 31P NMR; however, deprotonation of the solvent finally produced the cation (HC{PPh3}2)+, (H1)+ quantitatively. In the absence of coordinating anions, the tricationic complex ({Ph3P}2CH)Ag(CH{PPh3}2)](BF4)3 (3), containing the cation (H1)+ as ligand, could be isolated by reacting AgBF4 with the salt (H1)(BF4). All compounds were characterized by IR and 31P NMR spectroscopy; the structures of the compounds 2]Cl·1.25THF, 3·5CH2Cl2, 3·4C2H4Cl2, and (H1)(BF4) could be established by X-ray analyses. |
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Keywords: | Silver ylide complexes Trication Crystal structure Hexaphenylcarbodiphosphorane complex |
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