12Diphenylethene

12-Diphenylethene, also known as 1,2-diphenylethene or 1,2-diphenyl-1-ethene, is an organic compound with the chemical formula C18H16. It is a colorless to pale yellow liquid at room temperature, with a mild aromatic odor. The molecule consists of two phenyl groups (C6H5) connected by an ethylene (C2H4) bridge.

12-Diphenylethene is a versatile intermediate in organic synthesis. It is commonly used in the production of various dyes, pigments, and polymers. For instance, it can be used as a precursor in the synthesis of azo dyes, which are widely used in textiles and plastics for their vibrant colors.

The compound is also a useful building block in the synthesis of other organic compounds. For example, it can be used to prepare stilbenes, which are a class of organic compounds with a general structure of two phenyl groups connected by a vinyl group. Stilbenes have various applications, including in pharmaceuticals, agrochemicals, and materials science.

12-Diphenylethene is typically prepared by the condensation of acetophenone with benzene in the presence of a strong acid catalyst. The reaction proceeds via an acid-catalyzed dehydration process, where water is eliminated to form the double bond in the ethylene bridge.

Safety precautions should be taken when handling 12-Diphenylethene, as it is a flammable liquid. It should be stored in a cool, dry, well-ventilated area away from sources of ignition. In case of accidental release, appropriate personal protective equipment should be worn, and the area should be ventilated to prevent inhalation of vapors.