KINETIC PRESSURE AND SUBSTITUENT EFFECTS ON THE THERMAL ISOMERIZATION OF TRIPHENYLFORMAZANS.

Yoshimi Sueishi, Norio Nishimura

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The rates of the thermal isomerizations around N equals N (Process A) and C equals N (Process B) of substituted triphenylformazans were followed spectrophotometrically at various temperatures and under high pressures, and the activation parameters were determined. The values of the activation energy, entropy, and volume were found to be ca. 70 kJ mol** minus **1, ca. minus 20 J K** minus **1 mol** minus **1, and ca. minus 5. 0 cm**3 mol** minus **1 respectively for Process A, and ca. 40 kJ mol** minus **1, ca. minus 200 J K** minus **1 mol** minus **1, and ca. minus 10 cm**3 mol** minus **1 respectively for Process B. It is suggested that the thermal isomerizations both for Processes A and B proceed by the inversion mechanism.

Original languageEnglish
Pages (from-to)2598-2604
Number of pages7
JournalBulletin of the Chemical Society of Japan
Volume56
Issue number9
Publication statusPublished - Sep 1983
Externally publishedYes

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Isomerization
Kinetics
Entropy
Activation energy
Chemical activation
Temperature
Hot Temperature

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

KINETIC PRESSURE AND SUBSTITUENT EFFECTS ON THE THERMAL ISOMERIZATION OF TRIPHENYLFORMAZANS. / Sueishi, Yoshimi; Nishimura, Norio.

In: Bulletin of the Chemical Society of Japan, Vol. 56, No. 9, 09.1983, p. 2598-2604.

Research output: Contribution to journalArticle

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