Phenylpropiolic acid, C 6 H 5 C:C CO 2 H, formed by the action of alcoholic potash on cinnamic acid dibromide, C 6 H 5 CHBr CHBr CO 2 H, crystallizes in long needles or prisms which melt at 136-137° C. When heated with water to 120° C. it yields phenyl acetylene CsH b C; CH.
Pinner, Ber., 1892, 25, p. 1624): / NH N C?CsH 5 2C61 - 15 C +(CH 3 C0) 2 0 -> C6H5 C N; NH 2 N :C?CH3 or by the condensation of aromatic nitriles with acid chlorides in the presence of aluminium chloride (Eitner and Krafft, Ber., 1892, 25, p. 2263).
With the possible C 6 H 4 /C (C6H4 OH)2 ?0, CsH /CLCeI14]z0ï¿½ ?CO ? ?, CO / CO / I.
This compound on heating with phosphoric anhydride loses water and yields anthraquinone, CsH4 O 15 CsH
Conhydrine, CsH 17 NO, and pseudoconhydrine are probably stereoisomers, the latter being converted into the former when boiled with ligroin.