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- W2023879984 abstract "[RuCl2(dippe)2] (dippe = 1,2-bis(diisopropylphosphino)ethane) reacts with HC⋮CR (R = Ph, H) in dichloromethane in the presence of [NH4][PF6] furnishing the corresponding cationic vinylidene complexes trans-[RuCCHR(Cl)(dippe)2]+, which were isolated as tetraphenylborate salts. In an analogous fashion, the reaction of [RuCl2(dippe)2] with substituted propargyl alcohols HC⋮CC(OH)RR‘ (R = R‘ = Me; R = Me, R‘ = Ph) yielded the allenylidene derivatives [RuCCCRR‘(Cl)(dippe)2]+, which were also isolated as [BPh4]- salts. The reaction of trans-[RuCl(C⋮CPh)(dippe)2], formed by deprotonation of [RuCCHPh(Cl)(dippe)2][BPh4] by KOBut, with AgCF3SO3 in the presence of HC⋮CPh was carried out in an attempt to generate a cationic alkynyl−vinylidene species. However, this reaction yielded instead the unexpected tetranuclear heterobimetallic complex [{Ru(dippe)}2(μ-Cl)3(σ,η2-C⋮CPh)2{Ag2(μ-dippe)}]+, isolated as the [BPh4]- salt, in which two σ-alkynyl ligands attached to ruthenium are bridged by a [Ag2(μ-dippe)]2+ fragment. To understand better the coordination modes of dippe to silver, the complex [{Ag(dippe)}2(μ-dippe)][BPh4]2 was synthesized. The 31P{1H} NMR spectra of silver-containing derivatives, which display complex second-order patterns, have been analyzed in detail, and the X-ray crystal structures of trans-[RuCCH2(Cl)(dippe)2][BPh4], [{Ru(dippe)}2(μ-Cl)3(σ,η2-C⋮CPh)2{Ag2(μ-dippe)}][BPh4], and [{Ag(dippe)}2(μ-dippe)][BPh4]2 are reported." @default.
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- W2023879984 date "1998-06-30" @default.
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- W2023879984 title "Unexpected Formation of a Tetranuclear Heterobimetallic Complex by Reaction of a Ruthenium Alkynyl with AgCF<sub>3</sub>SO<sub>3</sub>" @default.
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