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• W2083315434 abstract "The reaction of exo-nido-5,6,10-[Cl(PPh3)2Ru]-5,6,10-(μ-H)3-10-H-7,8-C2B9H8) (1) with [(η4-diene)RhCl]2 in EtOH or with [(CO)2RhCl]2 in MeOH in the presence of KOH produced novel mixed-metal bimetallacarboranes (η4-diene)Rh(μ-H)Ru(PPh3)2(η5-C2B9H11) (4, diene = COD; 5, diene = NBD) or (CO)(PPh3)Rh(μ-H)Ru(PPh3)2(η5-C2B9H11) (10) along with a small amount of the mononuclear complexes closo-(CO)2(PPh3)Ru(η5-C2B9H11) and closo-(CO)(PPh3)2Ru(η5-C2B9H11), respectively. Complexes 4 and 10 were characterized by single-crystal X-ray diffraction studies which revealed the existence of two types of bridging bonds Ru−H−Rh and B−H···Rh in these species. The bridging hydrogen atoms are asymmetrically disposed within these linkages. Several separate experiments have been carried out for the synthesis of the anionic complex [closo-3,3-(PPh3)2-3-H-3,1,2-RuC2B9H11]-, which is proposed to be the key intermediate in the reaction of 1 with [(η4-diene)RhCl]2. The reaction of (PPh3)3RuHCl with [7,8-C2B9H12][Me3NH] under reflux in THF in the presence of Et4NCl yielded [closo-3,3-(PPh3)2-3-Cl-3,1,2-RuC2B9H11][Et4N] (7), which after reduction by LiAlH4 in THF afforded [closo-3,3-(PPh3)2-3-H-3,1,2-RuC2B9H11][Et4N] (8) in poor yield. Alternatively, treatment of (PPh3)3RuHCl with Tl2[7,8-C2B9H11] in THF at ambient temperature led to 8 in 84% yield. The anionic complex 8 and the known neutral closo-3,3-(PPh3)2-3-Cl-3-H-3,1,2-RuC2B9H11 (6) have been substituted for 1 in the synthesis of 4 under the same conditions. Structures of both anionic closo-ruthenacarboranes 7 and 8 have been confirmed by single-crystal X-ray diffraction studies. The NMR data [1H, 13C{1H}, 31P{1H}, and 11B] for the new mononuclear and binuclear ruthenacarborane complexes are discussed in detail." @default.
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• W2083315434 date "1999-01-28" @default.
• W2083315434 modified "2023-09-27" @default.
• W2083315434 title "Synthesis of Mixed-Metal (Ru−Rh) Bimetallacarboranes via <i>exo</i>-<i>nido</i>- and <i>closo</i>-Ruthenacarboranes. Molecular Structures of (η⁴-C₈H₁₂)Rh(μ-H)Ru(PPh₃)₂(η⁵-C₂B₉H₁₁) and (CO)(PPh₃)Rh(μ-H)Ru(PPh₃)₂(η⁵-C₂B₉H₁₁) and Their Anionic <i>closo</i>-Ruthenacarborane Precursors" @default.
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• W2083315434 doi "https://doi.org/10.1021/om9806592" @default.
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