Introduction. ± Sigmatropic shiftamers are (so far hypothetical) organic polymers in which localized electrons and/or atoms can be transported along the polymer chains by sequential sigmatropic shifts [1]. Recently, we described a shiftamer for the net transport of H-atoms along a polyacetylene chain via [1,7] shifts (Scheme 1) [1b]. We now show variants of this system that allow for the net tr...

Three polyacetylene compounds, 1, 2 and 3, have been isolated from the organic extract of a liquid culture of Hypsizygus marmoreus (Peck.) Bigelow (Japanese name: Bunashimeji). The structures of 1, 2 and 3 were determined by using spectroscopic methods. Compound 3 is new, and was identified as 8(E)-decene-4,6-diyn-1,2,10-triol. Compound 1 exhibits antifungal activity against the pathogenic fung...

We study the effect of electron-electron correlations on the energetics of solitons in electron-phonon models of quasi one-dimensional materials, In these combined PeierlsHubbard models, by use of quantum Monte Carlo techniques, we (l) establish that the ground state of an odd chain, singly charged or neutral, is a soliton; (2) calculate neutralsoliton creation energies; and (3) prove that "sol...