AbstractAddition of 3 equivalents of KH · BEt3 to [Me3NH][Me‐SiB10H12] followed by addition of one equivalent of SnCl2 or SbI3 affords the stanna‐sila‐closo‐borate(1–) 3 and stiba‐sila‐closo‐borane 4, respectively. [MePh3P] · 3 crystallizes in the orthorhombic space group P212121.