N16-oxides of sparteine, 2-methylsparteine and 2-phenylsparteine as ligands; spectroscopic and DFT studies of complexes with ZnX₂ (X=Cl, Br)

摘要

Six new ZnX₂ (X=Cl, Br) complexes with N16-oxides of sparteine, 2-methylsparteine and 2-phenylsparteine as ligands have been synthesized and characterized by MS, IR, NMR and DFT methods. All complexes have 1 : 1 stoichiometry. Complexation with N16-oxides involves inversion of the configuration at N16, converting ring C from a boat into a chair with the oxygen engaged in coordination. All complexes investigated are of composition [(L-H)+(ZnX₃)−] (where L is N-oxide). The structures of the complexes obtained have been compared with those of the monoperchlorate salts of the N-oxides.View full textDownload full textKeywords Bis-quinolizidine N-oxides, Zinc(II) complexes, NMR spectroscopy, IR spectroscopy, DFT calculationsRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00958970801993664