Anellated N-heterocyclic carbenes: 1,3-Dineopentyl-benzimidazol-2-ylidene,structural aspects of C-protonated precursor salts and an AgCl complex |
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| Authors: | Olaf Kü hl,Shanmuganathan Saravanakumar,Farman Ullah,Markus K. Kindermann,Peter G. Jones,Martin Kö ckerling,Joachim Heinicke |
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| Affiliation: | 1. Institut für Biochemie, Ernst-Moritz-Arndt-Universität Greifswald, Felix-Hausdorff-Strasse 4, D-17489 Greifswald, Germany;2. Institut für Anorganische und Analytische Chemie der Technischen Universität Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany;3. Anorganische Chemie – Festkörperchemie, Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany |
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| Abstract: | Access to 1,3-dineopentyl-benzimidazol-2-ylidene (1) by deprotonation of various benzimidazolium salts was studied. [Ag(1)Cl] was prepared from the corresponding benzimidazolium chloride. X-ray crystal structure analyses of benzo-, naphtho- and quinoxalino-anellated imidazolium salts displayed neither significant changes nor systematic trends of bond lengths and angles within the five-membered ring. Consistently downfield shifts of the 13C1H(2) nuclei reflect the influence of electron-withdrawing anellation. |
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| Keywords: | N-Heterocyclic carbene Imidazolium salt Anellation X-ray crystal structure Silver complex |
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