Abstract
The title compound C16H10N5O7Li is triclinic, witha=14.51(1),b=6.90(2),c=9.10(1) Å,α=101.5(1),β=67.1(2), γ=105.6°(1),Z=2 and space groupP¯1. Data were measured by photographic methods. The structure was solved by direct methods, and refined by full matrix least-squares. The refinement, based on 1337 reflections, gave the rather highR value of 0.11 because of poor quality data. The complex is dimeric. The coordination around the cation is distorted square-pyramidal. Two coordination sites are occupied by the nitrogen atoms of the bipyridyl ligand, two by the phenolic oxygen and oxygen ofo-nitro group, and the fifth coordination site is occupied by the phenolic oxygen belonging to the symmetry-related molecule (1−x,−y,1−z). Both oxygens act as bridges to form the dimer. The bridging is unsymmetrical, with Li-O (phenolic)=1.84(2) Å and Li1-O (phenolic)=2.16(2) Å (whereI=1−x,−y, 1−Z).
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Hundal, M.S., Sood, G., Kapoor, P. et al. Structure of lithium (picrate) (2,2′-bipyridyl). Journal of Crystallographic and Spectroscopic Research 21, 201–204 (1991). https://doi.org/10.1007/BF01161065
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DOI: https://doi.org/10.1007/BF01161065