作者:Daniel Berger、Patrick Wilhelm、Markus Neuenschwander
DOI:10.1002/(sici)1522-2675(19990310)82:3<326::aid-hlca326>3.0.co;2-l
日期:1999.3.10
In view of possible solid-state polymerizations of crystalline stacked 'push-pull'-acetylenes 1. a series of compounds 1 has been synthesized (Scheme 3), and the results of,X-ray analyses of 'push-pull'-acetylenes Id,e,f are discussed. Of these three compounds, methyl 2-morpholinoacetylene carboxylate (Id) is by far the best candidate giving crystals with nicely stacked molecules (Fig. 3). Even in this case, however, stacking parameters d= 4,12 Angstrom and alpha = 31,6 degrees are too large for allowing solid-state polymerizations.