IR-spektroskopische Untersuchungen an NH- und ND-Formazanen
Open Access
- 1 August 1968
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 23 (8) , 1064-1071
- https://doi.org/10.1515/znb-1968-0809
Abstract
The solid and solution IR spectra of the yellow formazans (1) show in most cases a strong J'(NH) or ν (ND) band. The ν (NH) absorption of the red formazans (2) is so weak (ε ≈ 1 [liter mole-1 cm-1]), that it is only observed in solutions and with long path length. In the case of C-ethoxycarbonyl-N.N′-diphenylformazan opening of the intramolecular N — H - - - N hydrogen bridge by light gives rise to a new intramolecular N — H - - - O hydrogen bridge. The nuclear N — H resonance of the red formazans is shifted far to low field (14 p. p.m.).Keywords
This publication has 0 references indexed in Scilit: