Direkter Nachweis von Diphenylnitrilimin bei der Photolyse von 2,5-Diphenyltetrazol

Authors

  • Hansruedi Meier Chemische Institute der Universität Zürich, Winterthurerstrasse 180, CH-8057 Zürich
  • Willy Heinzelmann Chemische Institute der Universität Zürich, Winterthurerstrasse 180, CH-8057 Zürich
  • Heinz Heimgartner Chemische Institute der Universität Zürich, Winterthurerstrasse 180, CH-8057 Zürich

DOI:

https://doi.org/10.2533/chimia.1980.504

Abstract

Irradiation of 2,5-diphenyltetrazole (2a) in an ether/pentane/ ethanol-glass at 77 K with UV-light of wavelength 280 or 290 nm yields diphenylnitrilimine (1b) by extrusion of nitrogen. The UV-spectrum of this 1,3-dipolar intermediate is shown in fig. 1. Between 160 and 175K, 1b undergoes a dimerization to give 1,2-bis(phenylazo)-1,2-diphenyl-ethylene (15). 2,4,5-Triphenyl-1,2,3-triazole (16), the main product of the photolysis of 2a at room temperature, is not formed on heating the solution of 15 to 300K.

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Published

1980-12-31

Issue

Vol. 34 No. 12 (1980): Forschung/Research

Section

Kurze Mitteilungen

License

Copyright (c) 1980 Hansruedi Meier

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
H. Meier, W. Heinzelmann, H. Heimgartner, Chimia 1980, 34, 504, DOI: 10.2533/chimia.1980.504.