Crystal structure, spectroscopy and magnetism of selected (−)sparteine and α-isosparteine tetrahalocuprate salts

(−)-Sparteinium tetrachloridozincate monohydrate

“…1) has parameters close to those reported for the copper analogue, (esp) 2+ (CuCl 4 ) 2À ÁH 2 O, and both complexes crystallize in the same chiral space group, P2 1 2 1 2 1 [Lee et al, 2004;Jasiewicz et al, 2006;CSD (Groom et al, 2016) refcodes CANVOD and CANVOD01, respectively]. The ligand esp is sparteine, also known as lupinidine, an alkaloid having four chiral centres and two protonable N sites.…”

“…The last (-)-sparteinium salt for which a crystal structure has been reported was also obtained as an hydrate, with a complex heteropolyoxidometalate anion (Streb et al, 2007). The dication of the -isomer of sparteine has also been characterized, with (CuCl 4 ) 2À or (CuBr 4 ) 2À , both crystallized as monohydrate species (Jasiewicz et al, 2006).…”

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].…”

“…1). The synthesis was performed according to the reported methods so we expected a salt identical with that obtained before [14,15].…”

Synthesis and spectral characterization of sparteine and α -isosparteine complexes with copper(II) sulfate

“…Complexes of this kind have been reported with a pseudo-tetrahedral metal ion environment [16][17][18]. Owing to our interest in sparteine and -isosparteine complexes [19][20][21][22], we have undertaken a project aimed at characterizing the spectral, analytical and structural properties of copper(II) complexes of (À)-sparteine and -isosparteine.…”