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Construction of an Explicit Basis for Rules Admissible in Modal System S4

✍ Scribed by Vladimir V. Rybakov


Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
142 KB
Volume
47
Category
Article
ISSN
0044-3050

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## Abstract An Extended __HΓΌckel__ MO treatment of the system __cis__‐stilbene (I)‐4a, 4b‐dihydrophenanthrene (II) indicates that the concerted photocyclisation is a conrotatory process of the first excited electronic state. The activation energies for the photocyclisation and for the thermal ring