Abstract
A new pyrryl fulgíde, E-(α)-(1,2-dimethyl-4-isopropyl-5-phenyl)-3-pyrryl-ethylidene (isopropylidene) succinic anhydride (1). was synthesized. Molecular and crystal structures were determined. The characters of crystal structure of pyrryl fulgide (1) was discussed. It was found that the pyrryl fulgide (1) has a twisted structure between pyrrole ring and the succinic anhydride portion, the dihedral angle between these two portions is 122.86(3)°. The phenyl ring located in the 5-position of pyrrole ring is not coplanar with the pyrrole ring. The distance between two reactive sites (C1 and C22 atoms) is 3.57Å which is favorable for the photo-induced intramolecular cyclization of pyrryl fulgide (1).
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