| abstract |
THE INVENTION RELATES TO DERIVATIVES OF 2- (4,3-PHENYL DISUBSTITUTE) -5-ALKYL-1,3,2-DIOXABORINANE. ACCORDING TO THE INVENTION, THEY HAVE THE GENERAL FORMULA: (CF DRAWING IN BOPI) X, Y ARE SIMULTANEOUSLY OR INDEPENDENTLY H, F, C1; R, R ARE AN ALKYL RADICAL OF NORMAL STRUCTURE HAVING 1 TO 7 CARBON ATOMS, AS CONSTITUENTS OF A NEMATIC MATERIAL, WHICH CONTAINS AT LEAST TWO CONSTITUENTS, ONE OF WHICH IS A COMPOUND OF THE INDICATED FORMULA TAKEN AT REASON FROM 3 TO 75 IN WEIGHT. THE INVENTION APPLIES IN PARTICULAR TO ELECTRO-OPTICAL DEVICES. |