ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Cyclophanes, XVI. The Crystal Structure of 4,5,7,8,12,13,15,16-Octamethyl[2.2]paracyclophaneThe title compound 1a crystallizes in space group I2/c with Z = 8 molecules per cell. The structure consists of two independent centrosymmetric molecules, which differ only slightly in respect to thermal vibrations (pseudo-symmetry: 2/m). The two six-membered rings are shifted by 0.62 Å resulting in a torsion angle of 15° for the dimethylene-bridges (C=C = 1.56 Å). The tetramethylbenzene rings are folded to a V-shape angle of 17.5°. The distance of the rings amounts to 3.16 Å. The final R-value for 1811 observed reflexions was 0.085.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19821150923
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