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- W2030295429 abstract "Abstract The clusters [Ru 3 (CO) 12− n (RCN) n ] ( n = 1–3; RCN = acetonitrile, adiponitrile, phenylenediacetonitrile) have been prepared in dichloromethane solution by reaction of [Ru 3 (CO) 12 ] with Me 3 NO in the presence of the desired nitrile. The number of coordinated nitriles depends on the nitrile concentration and to a lesser extend on the Me 3 NO/Ru 3 ration. The new cluster [Ru 3 (CO) 9 (MeCN) 3 ] is prepared and isolated in high yield. Spectroscopic IR and 13 C NMR investigations in solution indicate that the dinitriles remain monocoordinated but only in a concentrated medium (1M 3 (CO) 7 ( μ 2 −CO) 3 (MeCN) 2 ], the two nitriles are located on each side of the triruthenium plane, whereas for [Ru 3 (CO) 6 ( μ 2 −CO) 3 (MeCN) 3 ], two MeCN are located on one side of the triruthenium plane with the third lying on the other side. Variable-temperature 13 C NMR study reveals a fluxionality of the carbonyls around the trimetal core. The first fluxional motion involves in-plane carbonyl exchange with activation energies depending on the degree of substitution n . The influence of ligand substitution in the axial position on the mobility of the carbonyls is attributed to an increase of the π back-donation from the cluster to each of the remaining carbonyls with increasing substitution." @default.
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- W2030295429 date "1996-05-01" @default.
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- W2030295429 title "Coordination chemistry of mono- and di-nitriles in [Ru3(CO)12−n(RCN)n] (n = 1–3): influence of the CO/nitrile ratio on fluxionality" @default.
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- W2030295429 doi "https://doi.org/10.1016/0022-328x(95)05975-u" @default.
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