Photochemistry of azobenzenophanes with three-membered bridges

Publication Type
Journal contribution
Authors
Roettger, D. Rau, H.
Year of publication
1996
Published in
J. Photochem. Photobiol., A
Band/Volume
101/2-3
Page (from - to)
205-214
Abstract

Azobenzenophanes may be suitable precursor mols. for tetrazetidines with a four-membered nitrogen ring. The synthesis and photochem. of azobenzenophanes with at least one three-carbon bridge are reported. The photochem. is dominated by E .dblarw. Z isomerization. This class of azobenzenophanes has thermally stable Z,Z isomers, probably due to the rigidity of the three-carbon bridge. This stiffness, however, hampers tetrazetidine formation. Some clues to tetrazetidine formation are presented and an unusual thermal isomerization E,E .fwdarw. E,Z is reported.

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