LITHIUM TRIAMIDOSTANNATE(II), LI[SN(NH2)(3)] - SYNTHESIS AND CRYSTAL-STRUCTURE

Rusty-red glistening, transparent crystals of Li[Sn(NH2)(3)] were obta ined by reaction of metallic lithium with tetraphenyl tin in liquid am monia at 110 OC. The structure was determined from X-ray single-crysta l diffractometer data: Space group P2(1)/n, Z = 4, a = 8.0419(9) Angst rom, b = 7.1718(8) Angstrom, c = 8.5085(7) Angstrom, beta = 90.763(8)d egrees, R-1 (F-o greater than or equal to 4 sigma(F-o)) = 2.8%, wR(2) (F-o(2) greater than or equal to 2 sigma(F-o(2))) = 5.3%, N(F-o(2) gre ater than or equal to 2 sigma(F-o(2))) = 1932, N(Var.) = 65. The cryst al structure contains trigonal pyramidal complex anions [Sn(NH2)(3)](- ) with tin at the apex, which are connected to layers of sequence A B A B... by lithium in tetra-hedra-double units [Li(NH2)(2/2)(NH2)(2)](2 ).