Two fluoradene derivatives: pseudosymmetry, eccentric ellipsoids and a phase transition

Xia, A.; Selegue, J.P.; Carrillo, A.; Patrick, B.O.; Parkin, S.; Brock, C.P.

doi:10.1107/S0108768101008631

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

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Figure 7
Projection parallel to a of the FLDNB2 structure (Z′ = 2) at 295 and 250 K. Note that the c axis points into the plane of the drawing; the apparent repeat in the horizontal direction is csinβ. Molecules separated by Δx ≃ 1/2 are crystallographically independent. Note also that the dinitrophenyl fragments of the two molecules are very nearly superimposed, but that the orientations of the fluoradene ring systems differ noticeably.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 57| Part 4| July 2001| Pages 507-516

doi:10.1107/S0108768101008631

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