Previously unknown 1,2dialkyl-o- and 1,7-dialkyl-m-carboranes were prepared
by reaction of 1,2-disodio-o-carborane and 1,7-disodio-m-carborane with al
kyl bromides in liquid ammonia. Dialkyl-o- and dialkyl-m-carboranes with va
rious isoalkyl groups at the carbon atoms were also prepared for the first
time.