Abstract. The syntheses of lithium and alkaline earth metal complexes with the bis(borane-diphenylphosphanyl)amido ligand (1-H) of molecular formulas [{κ 2 -N(PPh 2 (BH 3 )) 2 }Li(THF) 2 ] (2) and (3), Sr (4), Ba (5)] are reported. The lithium complex 2 was obtained by treatment of bis(borane-diphenylphosphanyl)amine (1-H) with lithium bis(trimethylsilyl)-amide in a 1:1 molar ratio via the silylamine elimination method. The corresponding homoleptic alkaline earth metal complexes 3-5 were prepared by two synthetic routes -first, the treatment of metal bis(trimethylsilyl)amide and protio ligand 1-H via the elimination of silylamine, and second, through salt metathesis reaction involving respective metal diiodides and lithium salt 2. The molecular structures of lithium complex 2 and barium complex 5 were established by