title: Double N-H bond activation of N,N'-bis-substituted hydrazines with stable N-heterocyclic silylene.
abstract: The reaction of N-heterocyclic silylene (NHSi) L [L = CH{(C[double bond, length as m-dash]CH(2))(CMe)(2,6-iPr(2)C(6)H(3)N)(2)}Si] with benzoylhydrazine, 1,2-dicarbethoxyhydrazine, 1,2-diacetylhydrazine and 1,2-bis(tert-butoxycarbonyl)hydrazine in 1 : 1 molar ratio resulted in compounds 1-4 with an almost quantitative yield and five coordinate silicon atoms. Compounds 1-4 were formed by double N-H bond activation by deliberate selection of N,N'-bis-substituted hydrazine compounds bearing the -C(O)NHNH- unit. Compounds 1-4 were characterized by NMR spectroscopy, EI-MS and elemental analysis. The molecular structures of compounds 1-3 were unambiguously established by single crystal X-ray structural analysis.
authors.affiliation: Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077, Göttingen, Germany.
authors.forename: Ramachandran
authors.initials: R
authors.lastname: Azhakar
authors.forename: Rajendra S
authors.initials: RS
authors.lastname: Ghadwal
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
authors.forename: Jakob
authors.initials: J
authors.lastname: Hey
authors.forename: Dietmar
authors.initials: D
authors.lastname: Stalke
mesh_terms: D018360:Crystallography, X-Ray; D006571:Heterocyclic Compounds / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry*; D008958:Models, Molecular; D017646:Organosilicon Compounds / Q000737:chemistry*
chemical_list: D006571:Heterocyclic Compounds; D006834:Hydrazines; D017646:Organosilicon Compounds; C042228:N,N'-diacetylhydrazine