Structural characterization of p-benzosemiquinone radical in a solid state: the radical stabilization by a low-barrier hydrogen bond

Molčanov, K.; Kojić-Prodić, B.; Roboz, M.

doi:10.1107/S0108768106038870

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 6
Crystal packing of (a) the monoclinic polymorph of p-benzosemiquinone and (b) the monoclinic polymorph of quinhydrone viewed normal to the ac plane with symmetry elements. In the monoclinic p-benzosemiquinone, the disordered H1 proton is drawn in symmetry-equivalent positions to emphasize the symmetry of the hydrogen bond, but each position is partly occupied by s.o.f. = 0.5.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 62| Part 6| November 2006| Pages 1051-1060

doi:10.1107/S0108768106038870

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