It forms an addition product with acrylic ester, which on heating loses nitrogen and leaves trimethylene dicarboxylic ester.
Methane and its homologues give origin to the " paraffin " or " fatty series " of the general formula C,H 2, ,+ 1 000H, ethylene gives origin to the acrylic acid series, C n H 27, - 1 000H, and so on.
It oxidizes readily: exposure to air giving acrylic acid, nitric acid giving oxalic acid, bichromate of potash and sulphuric acid giving carbon dioxide and formic acid.
Two acids corresponding to the formula of Kekule and Claus are triphenyl acrylic acid, (C6H5)2C: C([[Cooh) C 6 H]],, and triphenyl acetic acid, (C,H,),C 000H.
Oxidation by strong oxidizing agents converts it successively into its aldehyde, acrolein, and into acrylic acid.
Doebner (Ber., 1902, 35, pp. 2129, 2 53 8; 1903, 3 6, p. 43 18) obtained compounds, which in all probability are cyclo-octadienes, by the distillation of s-vinylacrylic acid, sorbic acid, and cinnamenyl acrylic acid with anhydrous baryta.