Thiols are organic compounds containing the −SH-\text{SH}−SH (sulfur-hydrogen) functional group, which are often characterized by their strong, unpleasant odors.
Propane-1-thiol (C3H7SH\text{C}_3\text{H}_7\text{SH}C3H7SH) behaves as a weak acid in aqueous solution. Write the expression for the acid dissociation constant, KaK_{\text{a}}Ka, for propane-1-thiol.
Thiols react with carboxylic acids in a condensation reaction to form thioesters. Write a balanced chemical equation for the reaction between propane-1-thiol and propanoic acid (CH3CH2COOH\text{CH}_3\text{CH}_2\text{COOH}CH3CH2COOH). Use structures for all organic compounds with their functional groups clearly displayed.
Draw the skeletal formula for 3-methylbut-3-ene-1-thiol.
Ethane-1,2-dithiol (HSCH2CH2SH\text{HSCH}_2\text{CH}_2\text{SH}HSCH2CH2SH) reacts with carbonyl compounds to form a cyclic thioacetal in a condensation reaction. Write a balanced chemical equation for the reaction of ethane-1,2-dithiol with ethanal (CH3CHO\text{CH}_3\text{CHO}CH3CHO). Use structures for all organic compounds.
18 exam-style questions on OCR A A Level Chemistry Basic concepts of organic chemistry. Each one has a worked solution and a mark scheme showing where the marks go.