HCID 13978129, compound → HCID 53733830, compound

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Reaction Steps

An example of the efficacy of compounds of the invention (compound I) in broadening the nematic temperature range of admixtures including two ring cyclohexyl dioxane compounds is as follows. A binary eutectic mixture comprising 0.745 mole fraction of 5-ethyl-2-(4-pentylcyclohexyl)-1, 3-dioxane (compound A) and 0.255 mole fraction of 5-propyl-2-(4-heptylcyclohexyl)-1, 3 dioxane (compound B) exhibits a nematic temperature range of 12.5° C. to 26.5° C. Addition of a three ring compound of the formula ##STR11## namely, 5-ethyl-2-(4-pentylcyclohexyl) cyclohexyl)-1, 3 dioxane (compound C) to provide a eutectic mixture comprising 0.610 mole fraction of compound A, 0.189 mole fraction of compound B and 0.201 mole fraction of compound C resulted in a measured nematic temperature range of 8.6° C. to 59.7° C. while the mixture retained low viscosity and low optical birefringence, e.g., Δn=0.04.

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