Photochemistry of azobenzenophanes with three-membered bridges
- Publikations-Art
- Zeitschriftenbeitrag
- Autoren
- Roettger, D. Rau, H.
- Erscheinungsjahr
- 1996
- Veröffentlicht in
- J. Photochem. Photobiol., A
- Band/Volume
- 101/2-3
- Seite (von - bis)
- 205-214
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.