1 25X 1-(sulfamoylamino)methyl-1,2-dicarba-closo-dodecaborane 1.000 2 26E 7-(sulfamoylamino)methyl-7,8-dicarba-nido-undecaborane 0.842 3 25Y 1-(sulfamoylamino)methyl-1,7-dicarba-closo-dodecaborane 0.800