ABSTRACT
The asymmetric unit of the title compound, {[Pb(C(9)H(6)NO)(2)]·0.5C(3)H(7)NO}(n), comprises Pb(quinolate)(2) and half a dimethyl-formamide mol-ecule (which is disordered about a centre of inversion). The quinolate ligands N,O-chelate to a Pb(II) ion and simultaneously bridge a neighbouring Pb(II) ion to form a polymeric chain along [100] comprising Pb-linked Pb(2)O(2) distorted rhombi. These chains pack to form a square grid, with the channels thus defined occupied by the disordered solvent mol-ecules.
ABSTRACT
The asymmetric unit of the title complex, [Pb(C(8)H(5)O(4))(C(9)H(6)NO)](n), comprises a Pb(II) cation, a quinolin-8-olate anion and a 3-carb-oxy-benzoate anion. The coordination geometry of the Pb(II) atom is defined by one N and six O atoms, as well as a stereochemically active lone pair of electrons, and is based on a Ψ-dodeca-hedron. The quinolin-8-olate is chelating and the 3-carb-oxy-benzoate anion forms bonds to four different Pb(II) atoms. The benzoate end of the 3-carb-oxy-benzoate ligand chelates one Pb(II) atom and simultaneously bridges two Pb(II) atoms on either side, forming a chain along the b axis. The carboxyl end of the 3-carb-oxy-benzoate connects to a neighbouring chain by employing its carbonyl atom to form a bond to a Pb(II) atom and the hydroxyl group to form a hydrogen bond to a quinolin-8-olate O atom. Thereby, a layer is formed in the bc plane.
