207449-14-7Relevant academic research and scientific papers
Carborane complexes of ruthenium: Studies on the chemistry of the Ru(CO)2(η5-7,8-Me2-7,8-C2B 9H9) fragment and the X-ray crystal structure of [NEt4][Ru2(μ-Tl)(CO)4(η 5-7,8-Me2-7,8-C2B9H 9)2]
Jeffery, John C.,Jelliss, Paul A.,Liao, Yi-Hsien,Stone, F. Gordon A.
, p. 27 - 36 (1998)
Reactions between Tl[closo-1,2-Me2-3,1,2-TlC2B9H9] and [RuBr(CO)3(η3-C3H5)] in tetrahydrofuran (THF) affords mixtures of the compounds [Ru(CO)3(η5-7,8-Me2-7,8-C2B 9H9)] (1b) and Tl[Ru2(μ-Tl)(CO)4(η5-7,8-Me 2-7,8-C2B9H9)2] (2a) in a ratio 2:3. Treatment of the mixtures with [NEt4]I followed by I2 produces [NEt4][RuI(CO)2(η5-7,8-Me 2-7,8-C2B9H9)] (3b) as the only product. Complex 2a, isolated as the [NEt4]+ salt 2b, was the subject of a single-crystal X-ray diffraction analysis. The compound crystallises in the orthorhombic space group Pbcn [a=23.164(2), b=13.780(2), c=11.560(6) A]. The structure of the anion consists of two Ru(CO)2(η5-7,8-Me2-7,8-C2B 9H9) fragments linked together via a thallium atom, with the complex carrying an overall uninegative charge. The synthon [Ru(THF)(CO)2(η5-7,8-Me2-7,8-C 2B9H9)] (4b) is readily generated from 3b by the addition of AgBF4 in THF. The same procedure in MeCN produces the complex [Ru(NCMe)(CO)2(η5-7,8-Me2-7,8-C 2B9H9)] (4c). The removal of THF from 4b in vacuo gave the 16-electron complex [Ru(CO)2(η5-7,8-Me2-7,8-C2B 9H9)] and a polymeric material postulated to be [Ru(CO)2(η5-7,8-Me2-7,8-C2B 9H9)]n. Reaction of solutions of 4b in CH2Cl2 with 2-electron donor ligands yields the complexes [Ru(L)(CO)2(η5-7,8-Me2-7,8-C 2B9H9)] (4d, L=PPh3; 4e, L=CNBut; 4f, L=NC5H5). Addition of alkenes and alkynes to CH2Cl2 solutions of 4b did not give stable η2-adducts, but the species [Ru(CO)2(η5-7,8-Me2-7,8-C2B 9H9)] was observed in these reactions. The complex [Ru(CO)2(η2,η5-7,8-Me 2-10-C(H)=C(H)SiMe3-7,8-C2B9H 9)] (5a) was isolated from the reaction between 4b and Me3SiCCH. The IR and NMR spectra of the new compounds are reported.
