Jones, P.g.; Hopf, H.; Pechlivanidis, Z.; Boese, R.:
Structure of [4.4]paracyclophane and three [m.n]paracyclophane derivatives.
1994
In: Zeitschrift fuer Kristallographie, Jg. 209 (1994), Heft 8, S. 673 - 676
Artikel/Aufsatz in Zeitschrift1994Chemie
Titel:
Structure of [4.4]paracyclophane and three [m.n]paracyclophane derivatives.
Autor(in):
Jones, P.g.; Hopf, H.; Pechlivanidis, Z.; Boese, R.LSF
Erscheinungsjahr
1994
Erschienen in:
Titel:
Zeitschrift fuer Kristallographie
in:
Jg. 209 (1994), Heft 8, S. 673 - 676
ISSN:

Abstract:

The structures of (acetyl)[2.3]paracyclophane, (diacetyl)[3.3]paracyclophane and [4.4]paracyclophane show a gradation of structural distortions that are typical of paracyclophane systems, the steric effects of the forced bridgehead proximity becoming less as the bridges become longer. For bridges of equal length, the rings are parallel but slightly rotated with respect to each other. Unequal bridges cause the rings to tilt. The central bond of the four-atom bridges is significantly shorter (ca. 1.52 .ANG.) than a std. C-C single bond.