Abstract
The geometry of the 4,8,12-trioxa-4,8,12,12c-
tetrahydrodibenzo[cd,mn]pyrene system in the cationic state was
established by X-ray structural resolution of the salts formed
between the cationand various anions. The geometry was found to be
planar for the 4,8,12-trioxa-4,8,12,12c- tetrahydrodibenzo
[cd,mn]pyrenylium and 2,6,10-tri
(tert-butyl)-4,8,12-trioxa-4,8,12,12c-tetrahydrodibenzo[cd,mn]pyre
nylium cations with the monovalentanions I-, BF4-, PF6- AsF6-,
HNO3. NO3- and CF3SO3-, and the divalent anions S2O62- and
Mo6Cl142-. The salts were found to crystallize in distinct space
groups following a characteristic pattern. Mixed cation-anion
stacking resulted in space groups with high symmetry: Pbca in
three cases and R (3) over bar c in one; a temperature study of
the latter was made at ten different temperatures. The formation
of dimers of anions and cations resulted in lower-symmetry space
groups, mainly monoclinic (P2(1)/n, P2(1)/c and C2/c), but also P
(1) over bar.
Original language | English |
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Journal | Acta Crystallographica. Section B: Structural Science |
Volume | B55 |
Pages (from-to) | 410-423 |
ISSN | 2052-5206 |
Publication status | Published - 1999 |