[iPr2GaN(H)tBu]2 (1) and [Mes(Cl)GaN(H)tBu]2 (2) can be synthesized by the metathesis reaction of iPr2GaCl and MesGaCl2 with one equivalent of LiN(H)tBu, respectively. 1 and 2 were characterized by NMR, IR and MS techniques as well as by X-ray structure analyses. 1 and 2 consist of centrosymmetric dimeric molecules with a Ga2N2 skeleton. According to cryoscopic measurements in benzene, both amides are dimeric in solution, too.
Single crystals of MesSn(Cl)Me2 (1) and Mes2SnCl2 (2) were obtained by the reactions of MesGaCl2 with Me3SnF and Mes3SnF, respectively. 1 and 2 are monomeric molecules in the solid state. 1: space group P21/n, Z = 4. lattice dimensions at -70°C: a = 1202,3(1), b = 739,1(1), c = 1441,3(1) pm , β = 102,71(1)°, R1 = 0,0469; 2: space group Pbcn, Z = 4, lattice dimensions at -50°C: a = 1107,0(2), b = 949,9(1), c = 1729,8(2) pm, R1= 0,049.