Related Experiment Video
Updated: Feb 11, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Synthesis of p-Phenylene Sulfide Molecular Asterisks
Marc Gingras1, Alain Pinchart1, Carol Dallaire1
1Laboratory of Supramolecular Chemistry and Catalysis, Faculty of Sciences, Université Libre de Bruxelles, C.P. 160-06, 50 Ave. F.D. Roosevelt,1050 Brussels (Belgium), Fax: (+32) 2-650-2798.
Abstract:
"Megastars" with aromatic central cores, some of which fluoresce, were synthesized by the efficient connection of the side arms to the core by using the MacNicol reaction. Depending on the length of the side arm precursor, second-, third- (depicted), or fourth-generation molecular asterisks were obtained; a twelve-armed molecular asterisk was prepared when the benzene core was replaced by a coronene one.
Related Concept Videos
Preparation and Reactions of Sulfides
Molecular Orbital Theory I
Structure and Nomenclature of Thiols and Sulfides
Molecular Shape and Polarity
Dehydration Synthesis
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...
Synthesis and Decomposition Reactions

