CHIRAL COMPLEXES BY DIRECT SYNTHESIS OF A BIOMOLECULE AND METAL POWDERS. CRYSTAL STRUCTURES OF THE DICHLORO[(−)-SPARTEINE-N,N′]M(II) COMPLEXES (M = Cu, Zn)

Mass Spectrometry of Metal Complexes of Bis-Quinolizidine Alkaloids: Electron Ionization and Fast Atom Bombardment Mass Spectral Study of Copper(II) (–)-Sparteine and (–)-α-Isosparteine Complexes

“…the formation of complexes with transition metal(II) leads to a conversion of the nitrogen atom configuration in the sparteine ligand: as a consequence, all four alkaloid rings adopt the chair configuration and the configuration at the A/B and c/D ring junctions are trans and cis, respectively. [19][20][21][22][23][24]26,27 this conformation differs from that of the free (-)-sparteine ligand. 32,33 on the other hand, it has been reported that (-)-a-isosparteine remains structurally unchanged upon complexation 25,28 (figure 2).…”

“…considerable effort has been devoted to the study of these compounds by infrared and nuclear magnetic resonance spectroscopy, as well as by X-ray methods. [18][19][20][21]23,24,[26][27][28][41][42][43][44][45] However, the EI and fAB fragmentations of these compounds have not been reported.…”

“…the goal of this study was to establish if is its possible to differentiate transition metal(II) of zinc(II) and copper(II) dichloride (dibromide, diacetate) complexes of (-)-sparteine and (-)-a-isosparteine from their EI and fAB mass spectra. 1,[18][19][20][21]23,24 this problem has not been discussed previously in the literature.…”

Variety of polymorphic forms contrasted with uniform crystal packing in sparteine ML2 complexes: Crystal structure, spectroscopic and magnetic properties of (−)-α-isosparteine and (−)-sparteine complexes with CuBr2

“…Polymorphism among the crystals of (À)-sparteine metal(II) complexes is quite often encountered. Besides being displayed by in the studied (À)-sparteine CuBr 2 complex, it has been found in (À)-sparteine copper(II) dinitrate [18] and dichloride [19][20][21] and (À)-sparteine zinc(II) bromide [22,23].…”

Crystal structure of sparteinium tetrachlorocuprate monohydrate-packing polymorph

“…The presence of two amine atoms in the structure of sparteine led to its use as a bidentate ligand in various complexes (e.g., involving copper [1][2][3][4][5][6][7][8][9][10][11][12][13]). Following quaternization of both nitrogen atoms in the molecule sparteine was used as a dication in metalloorganic copper salts [14,15].…”