New 11-vertex osmacarborane 1,1-(PPh 3 ) 2 -1-H-3-O(CH 2 ) 4 - isonido -1,2,4-OsC 2 B 8 H 9

Hydride-containing 1,1-(PPh3)2-1-H-3-O(CH2)4-isonido-1,2,4-OsC2B8H9 osmacarborane bearing a charge-compensated ligand was synthesized via a reaction of the deprotonated form of medium non-icosahedral 5,6-nido-C2B8H12 carborane with (PPh3)3OsCl2 in a THF solution. The structure of this complex was assigned using 1H, 11B/11B{1H}, and 31P{1H} NMR spectroscopy.