Crystal structure of dimeric N-lithiohexamethyldisilazane etherate, [(Et₂O)Li{η-N(SiMe₃)₂}₂Li(OEt₂)]

Abstract

The crystal structure of a 1 : 1 adduct, Li[N(SiMe3)2]·OEt2, has been determined by X-ray diffraction. Crystals are tetragonal, space group Pn2, with a= 9.762(6), c= 17.280(9)Å, and Z= 4. The lattice contains dimeric molecules of symmetry 222 with the silazane groups functioning as the bridging ligands [Li–N 2.055(5)Å, Li–N–Li 75.1(2)°, N–Li–N 104.9(3)°]; the lithium atoms are three-co-ordinate [Li–O 1.943(6)Å, O–Li–N 127.5(1)°].