ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Synthesis and Stereochemistry of Tightly Clamped Benzophenone and Diphenylmethane SystemsThe novel benzophenones 1b,c, and diphenylmethanes 2b,c, clamped by short aliphatic bridges, have been synthesized by sulfone pyrolysis starting from 7,8, and 11. They are compared with [2.2]-metaparabenzenophane (21) as for the mode of ring topomerization. From UV spectra and from the temperature dependence of 1H NMR absorptions conclusions can be drawn on the stereochemistry, especially the conformational flexibility, observed in the [4.1]-bridged systems 1b, 2b.
Notes:
Die neuen, eng verbrückten Benzophenone 1b, c und Diphenylmethane 2b, c werden durch Sulfonpyrolyse, ausgehend von 7, 8 und 11, synthetisiert und hinsichtlich der Ringtopomerisierung mit [2.2]Metaparabenzenophan (21) verglichen. UV-Spektren und die Temperaturabhängigkeit der 1H-NMR-Spektren lassen Schlüsse auf die Stereochemie zu, insbesondere auf die in den [4.1]-verbrückten Systemen 1b, 2b beobachtete konformative Beweglichkeit.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19781110710
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