η1 and η2 Coordination of 1-amino-closo-dodecaborate

Abstract

The reaction of the sodium salt of 1-amino-closo-dodecaborate [Na]₂[NH₂–B₁₂H₁₁] ([Na]₂[1]) with [Au(PPh₃)Cl] and [Ni(THF)₂(Br)₂] led to η¹(N) coordination of 1 in [Na][Au(PPh₃)(NH₂–B₁₂H₁₁)] (2) and [Na]₆[Ni(NH₂–B₁₂H₁₁)₄] (3), respectively. Furthermore, η²(N,BH) coordination of 1 was found in [MePPh₃][Rh(PPh₃)₂(NH₂–B₁₂H₁₁)] (4), which was synthesized by the reaction of [MePPh₃][Na][1] with [Rh(PPh₃)₃Cl]. All compounds were characterized by single crystal X-ray diffraction and heteronuclear NMR spectroscopy.