[9 Ber. 21, 534 (1888); J. prakt. Chem. (2) 81, 384 (1910).

[10] Ber. 27, (1894).

[11] Ber. 31, 3163 (1898)

[12] Inaugural Dissertation of A. Kohler (1909), Univ. of Bern.



XVIII

PHENYLACETYLENE

C6H5CH=CHBr + KOH--> C6H5CTBCH + KBr + H2O

Prepared by JOHN C. HESSLER. Checked by J. B. CONANT and E. R. BARRETT.

1. Procedure

IN a 500-cc. Pyrex distilling flask are placed 150 g.
of potassium hydroxide. The mouth of the flask is provided with a
one-hole stopper holding a dropping funnel; the side tube of the flask
is connected with a condenser set for downward distillation.
The b-bromostyrene (100 g.) is placed in the dropping funnel.

The distilling flask is gradually heated in an oil bath until
the temperature of the bath is 200'0, and the bromostyrene is
then dropped in upon the molten potassium hydroxide, at the rate
of somewhat less than a drop a second. Since the boiling point of