A New Type of Anionic Rearrangement in Metalated Benzylhydrazines

Synthesis of Zirconium, Hafnium, and Tantalum Complexes with Sterically Demanding Hydrazide Ligands

“…23 In contrast, in [LiN(CH 2 Ph)N-(SiMe 3 )CH 2 Ph] 2 , which has bridging N(SiMe 3 )CH 2 Ph groups, the Li-N amide distance (av 1.939(8) Å) is shorter than the Li-N amine distance (2.091(8) Å). 24 The salts [LiN(i-Pr)-NMe 2 ] 4 and [LiN(t-Bu)NMe 2 ‚THF] 2 appear to be the first structurally characterized examples of lithium trialkylhydrazides.…”

2 Alkali and alkaline-earth metals

“…123 The structure of some heteroleptic magnesium amides (including Hauser bases), of potential use in organic synthesis, depends on the Lewis acidity and steric bulk of the amido groups as shown in Both structures contain a central core of an (MN) 2 ring and two MN 2 rings. 126 The structure of [Mg{(Me 3 Si) 2 N-NPh} 2 ] reveals the first monomeric magnesium hydrazide with sideon ligands forming a bent butterfly and CH ؒ ؒ ؒ Mg contacts whereas that of [Mg{Me 2 N-NSiMe 3 } 2 ] shows a central (MgN) 2 ring. 127 The synthesis and structure of [Mg(pc)(py) 2 ] has been reported; heating to 180 ЊC results in loss of py and the known complex [Mg(pc)H 2 O]ؒ2py is obtained in a moist atmosphere.…”