Issue 5, 2005

Matrix-isolation pyrolysis investigation of mercapto-functionalized 1,3,4-thiadiazoles: thermal stability of thiadiazole lubricant additives

Abstract

A series of high-vacuum thermolysis experiments with alkyldithio thiadiazoles was performed between ambient temperature and 900 °C to investigate the thermal stability of thiadiazole type lubricant additives. The thermolysis products were trapped by matrix-isolation techniques and characterized by IR spectroscopy. Thermolysis of 2-(tert-butyldithio)-5-methyl-1,3,4-thiadiazole (TB1) gave 2-methylpropene, isothiocyanic acid (HNCS), 2-mercapto-5-methyl-1,3,4-thiadiazole (McMT), hydrogen cyanide (HCN), carbon disulfide (CS2), acetonitrile (CH3CN), and elemental sulfur Sx [x = (2), 4, 6, 8]. A decomposition mechanism is discussed explaining the temperature-dependent composition of product mixtures, and a general precursor concept for organosulfur type anti-wear additives is presented.

Graphical abstract: Matrix-isolation pyrolysis investigation of mercapto-functionalized 1,3,4-thiadiazoles: thermal stability of thiadiazole lubricant additives

Article information

Article type
Paper
Submitted
28 Sep 2004
Accepted
19 Jan 2005
First published
04 Feb 2005

Phys. Chem. Chem. Phys., 2005,7, 731-737

Matrix-isolation pyrolysis investigation of mercapto-functionalized 1,3,4-thiadiazoles: thermal stability of thiadiazole lubricant additives

F. Hipler, R. A. Fischer and J. Müller, Phys. Chem. Chem. Phys., 2005, 7, 731 DOI: 10.1039/B415019H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements