A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is
A set of 4,4-dichloro-1,2-diazabutadienes derived from 3-nitrobenzaldehyde was prepared by the copper catalyzed reaction of the corresponding hydrazones with CCl4 in the presence of TMEDA. The structure of all products was confirmed by 1 H and 13 C NMR spectra and ESI-MS. X-ray diffraction revealed Cl···O halogen binding in the crystal form for some dienes. Moreover, Br···π and Cl··π types of halogen bonds are observed. Azo dyes absorb in the UV-Vis region with the max located at about 234−437doi:10.24820/ark.5550190.p011.403 fatcat:67nn3bzoenavhndjatv45ovdyy