metal-organic compounds
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In the heterometallic title bulky amido complex, [LiNa(C15H21N2Si)2(C6H16N2)], both alkali metal ions are four-coordinated with distorted tetrahedral geometries. The Li+ ion is N,N′-chelated by the N-silylated amido ligand, with Li—N = 2.015 (5) and 2.074 (5) Å. The two amido ligands are arranged cis to each other. The molecule exhibits a twofold rotational symmetry operation along the Li–Na axis. The Na+ ion is coordinated by two N atoms from the tetramethylethylenediamine ligand [Na—N = 2.553 (4) Å] and shares two amido N atoms from the N-silylated amido ligands with the Li+ ion. Although the crystal structure contains voids with an approximate volume of 50 Å3 there is no inclusion of solvent molecules.