GAS-CHROMATOGRAPHIC DETERMINATION OF VAPOR-PRESSURES OF PHEROMONE-LIKE COMPOUNDS .2. ALCOHOLS

The vapour pressures of 98 (Z)- and (E)-monounsaturated C-10-C-18 alco hols were determined using a method based on gas chromatographic reten tion data. This method, by utilizing a non-polar HP-1 capillary column , five experimental temperatures, four reference compounds (C-11, C-12 , C-14 and C-16 alkanols) whose polarities approximated that of the te st compounds and melting point corrections for compounds that are soli ds at ambient temperature, provided vapour pressures that agreed reaso nably well with the available literature values. For alkenols belongin g to structurally similar subseries, e.g., for omega-3, omega-5 and om ega-7 unsaturated derivatives, the vapour pressures may be represented over a range of pressure by simple equations in which the number of c arbon atoms is a parameter.