ISSN:
1572-901X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary Cobalt(II) and nickel(II) halide complexes of the ligands 2-(2′-methyl-8′-quinolyl)benzoxazole (m′q′bo), 2-(2′-methyl8′quinolyl)benzimidazole (m′q′bi) and 2-(4′-methyl-8′-quinolyl)benzimidazole (mq′bi) were synthesized and characterized by analytical, thermogravimetric, conductivity and magnetic data, and i.r. and electronic spectra. The ligands are bidentate N-donors yielding complexes where the coordination geometry depends on the metal ion and steric hindrance. All the cobalt complexes have formula [CoL2X2] and distorted tetrahedral geometry. Different types of nickel compounds were obtained: i) complexes of formula NiLX2 · n H2O (or EtOH) (L = m′q′bo or m′q′bi; n=0–1.5) which arepseudo-tetrahedral or five-coordinate and ii) complexes NiL2X2 · n H2O (L = mq′bi, n=3 or 4) where the metal is bound to four nitrogen atoms and the overall coordination geometry is tetragonal. The structural changes occurring after removal of water or alcohol from the complexes are also reported.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00623764
