2 Propanol, hydrogen bond dynamics

C. F. Chapman, R. S. Fee, and M. Maroncelli, "Measurements of the Solute Dependence of Solvation Dynamics in 1-Propanol The Role of Specific Hydrogen Bonding Interactions," submitted to Chem. Phys. Lett. 

The dielectric medium is normally taken to have a constant value of e, but may for some purposes also be taken to depend for example on the distance from M. For dynamical phenomena it can also be allowed to be frequency dependent, i.e. the response of the solvent is different for a fast reaction, such as an electronic transition, and a slow reaction, such as a molecular reorientation. It should be noted that e is the only parameter characterizing the solvent, and solvents having the same value (such as acetone, e = 20.7, and 1-propanol, e = 20.1, or benzene, e = 2.28, and carbon tetrachloride, e = 2.24) are thus treated equally. The hydrogen bonding capability of 1-propanol compared with acetone will in reality most likely make a difference, and the solvent dynamics of an almost spherical CCh will be different from the planar benzene molecule. 

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