The Preparation of 1,4-Di-n-alkyl-and 1-n-Alkyl-4-n-alkoxybicyclo-(2.2.2)octanes, and 1-n-Alkyl-4-n-alkoxybicyclo(2.2.2)octan-2-ones and and Investigation of Their Viscosities and TN-1 Values

Several 1,4-di-n-alkylbicyclo (2.2.2) octanes ((4), dialkyl BCO) have been prepared and virtual TN-1 values and extrapolated viscosities are reported. Their TN-1 values are markedly dependent on the nature of the host, but the ability of the BCO unit to give derivatives of relatively hight TN-1 is confirmed; the viscosities of the dialkyl BCO derivatives in various host mixtures are given and compared with the values for other low viscosity additives. 1-n-Alkyl-4-n-alkoxybicylco (2.2.2) octanes and 1-n-alkyl-4-n-alkoxybicyclo(2.2.2) octan-2-ones, (5) and (6) respectively, have also been prepared and the effect of the ether carbonyl functions on the TN-1 values is discussed. An outline of the synthetic routes to (4), (5) and (6) is given.