ISSN:
0009-2940
Keywords:
Cyclohexane
;
Liquid crystals
;
Oxygen effect
;
Scyllitol
;
Stereochemistry
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
1,2,3,4,5,6-Hexa(eq)alkylcyclohexane Model Compounds for Structure-Property Comparisons of Saturated Discotic Liquid CrystalsThe new hydrocarbon (1α, 2β, 3α, 4β, 5α, 6β)-hexahexylcyclohexane (19) and a number of new and differently functionalized scyllo-hexaalkylcyclohexane derivatives (16a, b, 18a - c) with identical stereochemistry were synthesized stereospecifically starting from simple chemical materials. In comparison to the known scyllitol hexaester 1 and the hexaether 2 none of the novel compounds 16, 18, and 19 were thermomesomorphic. This extreme difference in the thermotropic liquid-crystalline behaviour of the hexa(eq)hydroxycyclohexane (scyllitol) derivatives 1 and 2 on the one hand and of our varied hexa(eq)alkylcyclohexans 16, 18, and 19 on the other obviously is a function of the presence and the position of the element oxygen within the side chains of these symmetric star-/disc-shaped compounds. Details concerning this oxygen effect are discussed briefly.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19911241122
