Dilithium‐N,N′‐bis(trimethylsilyl)hydrazid und ein Hydrolyseprodukt side‐on und end‐on an N²⁻₂‐ und O²⁻₂‐gebundene Li‐Kationen

Abstract

Bei Abwesenheit starker sterischer oder elektronischer Zwange entstehen in einer thermoneutralen Reaktion bei der Darstellung der Bis(silyl)hydrazine, z. B. der des Bis(trimethylsilyl)hydrazins, die

Zinc Hydrazides and Alkoxyhydrazides: Organometallic Compounds with Novel Zn4N8, Zn4N6O and Zn4N4O2 Cage Structures

“…[10] The results of these investigations can also be compared with the better established chemistry of the alkali metal hydrazides, in particular that of lithium, which has many varieties of structural motifs. [11][12][13][14][15][16][17] A driving force for establishing routes to zinc hydrazides and derivatives and exploring their aggregation and reactivity is the need to find a molecular precursor route to zinc/nitrogen materials, which has not yet been attempted. The introduction of nitrogen into zinc-based materials such as the wide-bandgap semiconductor ZnO is an interesting preparative target, as it would open up the possibility of producing p-semiconducting zinc oxide by anion substitution with nitride, which so far has only been realised with additional Ga codoping.…”

1,2-Bis(trimethylsilyl)hydrazido Titanium Complexes

“…The 1 H, 13 C, and 29 Si NMR spectra confirm the molecular structure of 1. The 29 Si NMR spectrum shows two characteristic signals at δ ϭ 10.15 and 23.03.…”

“…The reaction is very slow and its progress, including the elimination of Me 3 SiCl, can be followed by NMR spectroscopy. 1 H, 13 C, and 29 Si NMR investigations unequivocally showed that 1 is completely transformed to 2 upon further reaction with the hydrazine. The 29 Si NMR spectrum of 2 features two signals at δ ϭ 7.86 and 13.78.…”

Silylhydrazine und dimere N,N′-Dilithium-N,N′-bis(silyl)hydrazide - Synthesen, Reaktionen, Isomerisierungen

“…Erste Kristallstrukturuntersuchungen dieser Salze wurden jedoch erst in den letzten zehn Jahren beschrieben. Charakterisiert wurden: a) Ein hexameres Monolithiumsilylhydrazid, (RNH±NHLi) 4 [5,6]; c) zwei trimere N,N'-Dilithium-N,N'-bis(silyl)hydrazide, (RSiMe 2 NLi±NLi±SiMe 2 R) 3 , R = C 6 H 5 [7], CMe 3 [8]; d) ein dimeres (N,N'-Dilithium-N,N'-bis(silyl)hydrazid-Nlithium-N',N'-bis(silyl)hydrazid, [Me 3 SiNLi±NLiSiMe 3Ĺ iNH±N(SiMe 3 ) 2 ] 2 [5,9]; e) ein dimeres N-Lithium-N,N'-bis(silyl)hydrazid, (Me 3 CSiMe 2 NH±NLiSiMe 2 CMe 3 ) 2 [8,10]; f) ein dimeres N,N'-Dilithium-N,N'-bis(silyl)hydrazid, [LiNH±N(SiMe 2 C 6 H 5 ) 2 ] 2 [7]; g) ein dimeres N-Lithium-N,N',N'-tris(silyl) [11]; h) zwei monomere N,N'-Dilithium-N,N'-bis(silyl)hydrazide, RR'SiCMe 3 ±NLi±NLi±SiCMe 3 R,R', R = Me, R' = CMe 3 [12]; R = R' = C 6 H 5 [13]. (6) [7].…”

“…Bei der Bildung von 12 aus 11 ist wieder eine Silylgruppenwanderung erforderlich. 6 Moleku È lstruktur von 12 im Kristall 12 kristallisiert aus Benzol in gelben, ro È ntgentauglichen Kristallen in der triklinen Raumgruppe P1 mit einem Moleku È l in der asymmetrischen Einheit. Im Festko È rper liegt 12 als Dimer vor, welches durch ein zentrales Li 4 N 4 -Geru È st zusammengehalten wird.…”