727418-94-2Relevant academic research and scientific papers
Novel Neutral and Cationic Mono-Aziridine Complexes of the Type [CpMn(CO)2Az], [CpCr(NO)2Az]+, and [(Ph 3P)(CO)4ReAz]+ via CO-, Hydride-, and Chloride-Elimination Reactions
Wilberger, Roland,Piotrowski, Holger,Warchhold, Marcus,Lorenz, Ingo-Peter
, p. 2485 - 2492 (2003)
The monoaziridine complexes 1- 5 are obtained by three differently induced substitution reactions. The photolytically induced CO substitution reaction of [CpMn(CO)3] with 2,2-dimethylaziridine leads to the neutral N-coordinate aziridine complex [Cp(CO)2Mn{N(H)CMe2CH 2}] (1). The protonation of [(Ph3P)(CO)4ReH] with CF3SO3H and consecutive treatment with 2,2-dimethylaziridine or 2-ethylaziridine gives the salt-like aziridine complexes [(Ph3P)(CO)4Re{N(H)CMeCH2})KCF 3SO3) (2) or [(Ph3P)(CO)4Re{N(H) CEtCH2}](CF3SO3) (3) by hydride elimination reactions. The like-wise salt-like complexes [Cp(NO)2Cr{N(H)CMe 2CH2}](BF4) (4) and [Cp(NO)2Cr{N(H) CHEtCH2}](CF3SO3) (5) are synthesized from [CpCr(NO)2Cl] by chloride elimination with AgX (X = BF4, CF3SO3) in the presence of 2,2-dimethylaziridine or 2-ethylaziridine, respectively. As a result of X-ray structure analyses, the metal atoms are trigonal pyramidally (1, 4, 5) or octahedrally (2, 3, cis-position) configurated; the intact three-membered rings coordinate through the distorted tetrahedrally configurated N atoms. All compounds 1-5 are stable with respect to the directed thermal alkene elimination to give the corresponding nitrene complexes; the IR, 1H- and 13C{ 1H}-NMR, and MS spectra are reported and discussed.
