ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract Irradiation of(Z)-α, β-diarylacrylonitriles (1) ArCH=C(CN)Ar′ (a: Ar=2-thienyl, Ar′=Ph;b: Ar=p-MeC6H4, Ar′=Ph) in the solid state gives cyclobutane dimers (2) in good yield. The mass spectra of the dimers, where no fragments derived from dimers with equal groups on adjacent carbons are present, suggest a “truxillic” structure (head to tail dimerization). X-Ray determinations confirm a centrosymmetric arrangement with a D2d symmetry of the cyclobutane ring and a puckering constantϕ=24.0° for (2a) significantly higher than that of (2b) (ϕ=19.2°).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01185347
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