Tetrakis(t-butyl)tetraborane(4), Bu4 tB4; synthesis of the first peralkyl derivative of a 2N framework electron count deltahedral borane

The reaction of B4Cl4with lithium alkyls results in the formation of alkylated and peralkylated derivatives of the tetraboron framework; the examples reported include EtB4Cl3, Et2B4Cl2, and Bu4tB4.