Topics - Thiophene
Thiophene (thiofurfurane) has a molecular weight of 84.14 and contains 57.10% of carbon, 4.79%of hydrogen and 38.11% of sulfur. It occurs naturally in the pyrolysis products of coal and is present at about 1-2% in Benzole the aromatic extract of coal or coke oven gas. It also occurs in technical benzene from which it is quite difficult to separate. It is prepared commercially by dehydrogenating butane with sulfur followed by cyclization with sulfur. It can also be produced by passing a mixture of acetylene and hydrogen sulfide over hot bauxite or nickel hydroxide. It can be separated by from benzene by gas chromatography but requires a high efficiency capillary column and a dispersive stationary phase.