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Zur Reaktion von Carben-Addukten des Kohlenstoffdisulfids mit Brom und Iod [1] / On the Reaction of Carbene Adducts of Carbon Disulfide with Bromine and Iodine [1]
Abstract The carbene adducts 3 are obtained as stable solids from the imidazol-2-ylidenes 1 and CS2. 3 c reacts with bromine to give the cationic bromosulfane 4, whereas iodine forms the
Methoxyalky 1-funktionalisierte 2,3-Dihy droimidazol-2-ylidene [1] / Methoxyalkyl Functionalized 2,3-Dihydroimidazol-2-ylidenes [1]
The 2,3-dihydro-l,3-di(methoxyalkyl)imidazol-2-ylidenes are obtained from the corresponding cyclic thioureas and potassium. With CS2, the imidazolium dithiocarboxylates are formed. The results of
Synthesis of imidazol-2-ylidenes by reduction of imidazole-2-(3H)-thiones
An improved synthesis of the title compounds is reported. Reaction of the N,N'-dialkylthioureas 1 with 3-hydroxy-2-butanone gives the imidazole-2(3H)-thiones 2 which on treatment with potassium in
2,3-Dihydroimidazol-2-ylidenes and their main group element chemistry
Abstract The coordination chemistry of stable or in situ accessible carbenes is still rapidly developing. Owing to their strong basicity, they may act both as ligands in coordination compounds and as
Derivate des Imidazols, XIX†. Koordination oder Reduktion? Zur Reaktion von 1,3-Diisopropyl-4,5-dimethylimidazol-2-yliden mit Schwefelhalogeniden und Schwefeloxidhalogeniden‡
Imidazole Derivatives, XIX1 . — Coordination or reduction? On the Reaction of 1,3-Diisopropyl-4,5-dimethylimidazol-2-ylidene with Sulfur Halides and Sulfur Oxygen Halides2 The reaction of
1,3,4,5-Tetramethyl-2-methyleneimidazoline—an ylidic olefin
The ylidic properties of 1,3,4,5-tetramethyl-2-methyleneimidazoline 4, obtained by deprotonation of the pentamethylimidazolium ion 3, are revealed both by its physical and chemical properties; the
A stable carbene iodine adduct: secondary bonding in 1,3-diethyl-2-iodo-4,5-dimethylimidazolium iodide
The stable carbene iodine adduct 2 is formed by the reaction of the imidazol-2-ylidene 1 with iodine; the X-ray structure of 2 is reported.
Weak interionic interactions in 2-bromoimidazolium derivatives
Abstract The 2-bromoimidazolium bromide [ImBr]Br (5, Im=2,3-dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene) is prepared from Im (4) and bromine. From 4 and CBr4, the adduct [ImBr]Br · CBr4
Nucleophilic Aromatic Substitution with 2,3-Dihydro-1,3-diisopropyl- 4,5-dimethylimidazol-2-ylidene
2,3-Dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (1) reacts with an excess of hexafluorobenzene in the presence of boron trifluoride diethyletherate to give 1,3-diisopropyl-4,5-