THE MECHANISM OF THE REACTIONS OF HYDROCARBONS WITH SULFUR¹

Abstract

The reactions of olefins and polyolefins with sulfur at 140°have been discussed recently by Fanner and Shipley (1, 2). These investigators suggested that the sulfur was acting by a free radical mechanism involving either the unsaturation electrons of the hydrocarbons or the active methylene groups.The main aim of the present research, initiated in September, 1946, has been the elucidation of the mechanism of the high temperature (above 200°) reactions of sulfur with hydrocarbons. In gaining an understanding of the fundamental nature of these processes, a study of the products from alkyl-substituted aromatic compounds has proven of considerable value. SUMMARY A general free radical mechanism of the reactions of hydrocarbons with sulfur has been developed. It has been applied successfully to the explanation of the formation of all known products of the reactions, as well as to the prediction of molecular structures of several heterocyclic compounds which have been isolated but not characterized.

Synthesis of 1-Thia-5,7-Diazacyclopenta[cd]- Phenalenes from 6(7)-Derivatives of Perimidine

“…Free radical species are known to easily open the cyclic sulfur molecule, forming more reactive polysulfides [15]. Sulfur also acts as a biradical in processes occurring above 200°C and can initiate radical reactions [16]. Assuming that the thiophene ring peri annelation reaction may occur according to a free radical mechanism, we decided to synthesize 1-thia-5,7-diazacyclopenta[cd]phenalenes 2 by fusing benzoyl-(compounds 1а-с,g) and formylperimidines (compounds 1d-f) with elemental sulfur.…”

Precursors of volatile organic compounds emitted during phosphorite processing

“…To explain the reason for the presence of alkenes in the free bitumen fraction, further study is required. Alkenes can easily react with elemental sulfur giving organic sulfur compounds 12, 13 .…”

Investigating the Thermal Stability of Organic Thin‐Film Transistors and Phototransistors Based on [1]‐Benzothieno‐[3,2‐b]‐[1]‐benzothiophene Dimeric Derivatives

“…Indeed, hetero‐acenes containing sulfur atoms, present superior properties, which can be rationalized by their strong non‐covalent S⋅⋅⋅S and π‐unit interactions and large orbital overlap . Since it was first isolated in 1949, BTBT has not received much research attention until it was successfully synthesized .…”

“…[3] Indeed, hetero-acenes containing sulfur atoms, present superior properties, which can be rationalized by their strong non-covalent S···S and p-unit interactions and large orbital overlap. [4] Since it was first isolated in 1949 [5] , BTBT has not received much research attention until it was successfully synthesized. [6] In 2006, its biphenyl derivative DPh-BTBT was synthesized and exhibited high mobility (m) of 2.0 cm 2 V À1 s À1 , which proved that BTBT core could be a prominent candidate for OTFTs with high mobility.…”