Draw the missing intermediate and add curved arrows for the production of phenylethyne by the double dehydrohalogenation of 2,2-dibromoethylbenzene. Note that, although stereochemistry is not graded, it is an important part of the mechanism.

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.