Metal Boron Hydrides

The Covalent Hydrides and Hydrides of the Groups V to VIII Transition Metals

“…149 Salts of the B 9 H7 2 anion are known, although salts containing metal cations have not been reported. Stock 70 reported the existence of Na 2 B 2 H 6 , but it is now believed that this compound does not exist as a stable entity.…”

“…Stock 70 reported the existence of Na 2 B 2 H 6 , but it is now believed that this compound does not exist as a stable entity. 155 NaH + B 10 H 14 -^ NaB 10 149 A Bu boron hydride is unknown, but metal salts of the B n Hr 4 anion have been reported. 153 Decaborane is a reasonably strong monoprotic acid which furnishes the B 10 Hr 3 anion.…”

Partial incorporation of a cyclopentadienyl ligand into a molybdaborane to form a molybdacarbaborane

“…Symmetrical [1,2] or unsymmetrical cleavage [3] of the borane cluster can occur to give simple Lewis acid-base adducts or ionic salts, respectively. Alternatively, polyhedral boranes can react with Lewis bases to form borane adducts with displacement of molecular hydrogen, without cleavage of the cluster framework [4,5].…”

“…Reaction of I with NEt 3 in toluene at 120°C for 7 days gives a 90% yield of the molybdacarbaborane nido-1-[Mo(g-C 5 H 5 )(g 3 [20].…”

“…Examples include nido-[Fe(g-C 6 Me 6 )C 2 B 3 H 7 ] prepared by degradation of the 7-vertex cluster closo-[Fe(g-C 6 Me 6 )C 2 B 4 H 8 ] via loss of the apical {BH} fragment [23], nido-1-[Co(g-C 5 H 5 )C 2 Me 2 B 3 H 5 ] prepared similarly or from reaction of nido-2-[Co(g-C 5 H 5 )B 4 H 8 ] with but-2-yne [24], and [Fe(CO) 3 [25]. There are also numerous closo clusters containing the planar ligand [26].…”