Dilithium‐ N,N ′‐bis(trimethylsilyl)hydrazid und ein Hydrolyseprodukt side‐on und end‐on an N 2− 2 ‐ und O 2− 2 ‐gebundene Li‐Kationen

Dilithium N,N ′‐Bis(trimethylsilyl)hydrazide and a Hydrolysis Product: Side‐On‐ and End‐On‐Coordinated Li Cations to N 2− 2 and O 2− 2N,N ′‐Bis(trimethylsilyl)hydrazine is converted into the dilithium derivative [(Me 3 Si) 2 N 2 Li 2 ] · 2 thf ( 1 ) by n BuLi. Compound 1 forms a tetramer which lies on a crystallographic inversion centre. The Li + ions are found to be end‐on to the NN units and also coordinated by thf, but three Li + ions are also positioned symmetrically above the NN bonds. The hydrolysis of 1 in air leads to the formation of [(Me 3 SiOLi) 4 · Li 2 O 2 · LiN(SiMe 3 ) 2 ] · 2 thf ( 2 ) which contains four oxide and one peroxide ions. The O 2− 2 unit is side‐on‐coordinated by three Li + .