The structure-property correlation for linear molecules of the A_n type is represented by a simple function of n with a restricted number of parameters.The correlation is similar for all linear molecules with similar variations of all contributing values,so that related properties of any linear molecules vary similarly.This was exemplified by various physicochemical properties (boiling point,melting point,heat of sublimation,heat of vaporization,diamagnetic susceptibility,ionization potential,long-wave transition energy,hyperpo-larizability,logarithm of the octanol-water distribution coefficient) for all saturated linear hydrocarbons and corresponding perfluoro derivatives,unsaturated linear hydrocarbons and those with conjugated double bonds,oligothiophenes,linearly fused aromatic rings,RNA duplexes,and bilayer lipide membranes.The simplified relations obtained allow a sufficiently precise assessment of various properties of any linear molecule.
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