| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5213313 | Tetrahedron | 2016 | 6 Pages |
Abstract
The anion of 2-ethynyl-1-methylpyridinium salts, which polymerized rapidly, can be represented as the mesomeric betaine 1-methylpyridinium-2-acetylide or as the cumulene-type structure 1-methylpyridin-2-allenylidene. Palladium complexes have been prepared starting from 2-ethynylpyridine and Pd(PPh3)4 or PdCl2(PPh3)2 followed by methylation of the resulting complexes to the title compounds. Results of calculations and spectroscopic measurements are discussed with respect to the zwitterionic or allenylidene resonance forms.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Susanne Haindl, Jiayi Xu, Tyll Freese, Eike G. Hübner, Andreas Schmidt,