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Reactions of CS 2 and C(S)NPh Adducts of N‐Heterocyclic Carbenes with [Ru 3 (CO) 12 ]: Remarkable Reactivity of These Betaines Involving One or Two C–S Bond Activation Processes
Author(s) -
Cabeza Javier A.,
GarcíaÁlvarez Pablo,
Guadalupe HernándezCruz M.
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200245
Subject(s) - chemistry , reactivity (psychology) , adduct , stereochemistry , medicinal chemistry , betaine , bond cleavage , thiazole , cleavage (geology) , carbene , catalysis , organic chemistry , pathology , fracture (geology) , engineering , medicine , alternative medicine , geotechnical engineering
Two structurally related tetranuclear complexes, [Ru 4 (μ 4 ‐κ 2 C , S ‐IMe–CS)(μ 4 ‐S)(μ‐CO) 2 (CO) 9 ] ( 1 ) and [Ru 4 (μ 4 ‐κ 2 C , N ‐TMe–CNPh)(μ 4 ‐S)(μ‐CO)(CO) 10 ] ( 2 ), have been isolated from reactions of [Ru 3 (CO) 12 ] with 1 equiv. of the betaines IMe–CS 2 (IMe = 1,3‐dimethylimidazol‐2‐ylidene) and TMe–C(S)NPh (TMe = 3‐methylthiazol‐2‐ylidene), respectively. Both products contain μ 4 ‐S ligands that arise from the unprecedented cleavage of the thiocarbonyl C–S bonds of the corresponding betaines. A hexanuclear derivative, [Ru 6 {μ 3 ‐κ 4 C 2 , N , S ‐S(CH) 2 N(Me)CCNPh} 2 (μ 4 ‐S) 2 (CO) 14 ] ( 3 ), has also been obtained from the reaction involving TMe–C(S)NPh. This product arises not only from the cleavage of the betaine thiocarbonyl C–S bond, but also from the additional activation of the C–S bond within the thiazole ring.