Low-dimensional framework constructed by silver(I) trifluoromethylsulfonate with 1,5-bis(benzimidazol-2-yl)-3-oxapentane or 1,6-bis(benzimidazol-2-yl)-2,5-dioxahexane
ABSTRACT The ligands 1,6-bis(benzimidazol-2-yl)-2,5-dioxahexane (DEBIm) and 1,5-bis(benzimidazol-2-yl)-3-oxapentane (OEBIm) reacted with silver(I) trifluoromethylsulfonate producing [Ag(DEBIm)](CF3SO3) (1) and [Ag(OEBIm)](CF3SO3) (2), respectively. The cation [Ag(L)]+(L=OEBIm or DEBIm) in both complexes is bent in semi-enclosed form due to the presence of oxygen in the ligands which forms either coordination bond or weak non-bonding interaction with the Ag(I) ion. Crystallographic analyses showed that [Ag(DEBIm)]+ (in 1) and [Ag(OEBIm)]+ (in 2) are assembled differently by the anion CF3SO3− via hydrogen bond N(C)H⋯O to give 1-D chain and via NH⋯O and CH⋯F to give 2-D network, respectively. The complexes were also identified by IR and 1H NMR spectroscopy.
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ABSTRACT: Two new cobalt(II) complexes [Co(obb)2](pic)2·3(C2H3N) (1) and [Co(Etobb)2](pic)2·2DMF (2) were prepared by the reaction of cobalt(II) picrate with the ligands 1,3-bis(benzimidazol-2-yl)-2-oxopropane (obb) and 1,3-bis(1-ethylbenzimidazol-2-yl)-2-oxopropane (Etobb), respectively. Single crystal X-ray diffraction revealed that [Co(obb)2]2+ and [Co(Etobb)2]2+ have a different arrangement. In complex 1 the coordination sphere around cobalt(II) is distorted tetrahedral, whereas in complex 2 the coordination sphere around cobalt(II) is distorted octahedral (where the N4 equatorial plane is formed by four benzimidazoles nitrogen atoms and the axial positions are occupied by two oxygen atoms from the two ligands). The complexes were also identified by IR and UV/Vis spectroscopy.Zeitschrift für anorganische Chemie 09/2009; 636(3‐4):629 - 633. · 1.16 Impact Factor
- Acta Crystallographica Section E-structure Reports Online - ACTA CRYSTALLOGR E-STRUCT REP. 01/2009; 65(5).