65738-85-4

Basic information

• Product Name: p-Dimethylaminobenzendiazoradikal
• CAS NO: 65738-85-4
• Molecular Weight: 148.188
• Mol File: 65738-85-4.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: p-Dimethylaminobenzendiazoradikal(CAS DataBase Reference)
• NIST Chemistry Reference: p-Dimethylaminobenzendiazoradikal(65738-85-4)
• EPA Substance Registry System: p-Dimethylaminobenzendiazoradikal(65738-85-4)

Safety Data

• Hazardous Substances Data: 65738-85-4(Hazardous Substances Data)

Upstream product

• 24564-52-1 4-(dimethylamino)benzenediazonium tetrafluoroborate 

Downstream Products

• 54417-83-3 (4-N,N-dimethyl-aminophenyl)-(4N-methyl-pyridinio)-acetylene iodide 

Relevant articles and documents

Formation and Identification of Aryldiazenyl Radicals Using the ESR Technique

Aryldiazenyl radicals were formed at -104 - -116 deg C by photoirradiation of cyclopropane solutions of 1-aryl-2-(arylthio)diazenes and of 1-aryl-3,3-dimethyltriazenes in the presence or absence of olefins, and also by irradiation of cyclopropane solutions of substituted 1,2,3-benzothiadiazoles in the presence of di-t-butyl peroxide.The ESR spectra were analyzed and the hfs constants were assigned by reference to the spectra of methyl, 2H, and 15N-labelled aryldiazenyl radicals and to the results of CINDO calculations.Aryldiazenyl radicals are relatively persistent and the -N=N group rotates about the C-N2 bond axis.The preferred conformations of the radicals were considered.

Pulse Radiolysis of Arenediazonium Salts in Water/tert.-Butanol

The pulse radiolysis of benzenediazonium tetrafluoroborate and its p-NMe2, p-MeO, p-Me, p-Cl, p-COOEt, and p-CN derivatives was studied in water/tert.-butanol mixtures.Absorption spectra observed at wavelengths between 400 and 700 nm were attributed to the recombination products (tetrazadienes) Ar-N=N-N=N-Ar of arenediazo radicals Ar-N=N. which are generated by a diffusion-controlled reaction of the solvated electrons with the solute.The recombination of Ar-N=N. competes with an unimolecular decay of these radicals.According to an inhomogeneous initial distribution of Ar-N=N. the apparent rate of the recombination reaction is higher than the diffusion-controlled limit.For the unimolecular decay of Ar-N=N. rate constants between (1.8 and 330) * 105s-1 were calculated.The tetrazadienes decompose unimolecularly with rate constants from (0.3 to 17) * 105s-1. - The rate constants of the decay of the arenediazo radicals as well as of the decomposition of tetrazadienes exhibit good Hammet plots with almost identical reaction constants indicating similar paths of nitrogen elimination.