Lithium pnictidoaluminates (Et2O)(2)Li[mu-E(SiMe3)(2)](2)AlH2 (E = P, As): New mixed-metal pnicogen-bridged four-membered ring compounds

摘要

The lithium pnictidoaluminates (Et2O)(2)Li[mu-E(SiMe3)(2)](2)AlH2, E = P (1) and As (2), were obtained from the reactions between LiAlH4 and E(SiMe3)(3) in diethyl ether by following dehydrosilylation chemistry described earlier by us for related gallium derivatives. No reaction was detected for E = N. Single-crystal X-ray diffraction studies for 1 and 2 provided the isomorphous structural solutions featuring the planar four-membered {Li[mu-E](2)Al} cores. [References: 44]