COOPERATIVITY BETWEEN CATION, OH OR LEWIS-ACIDS, OH INTERACTIONS AND H-BONDS OR VAN-DER-WAALS FORCES

The polarisation of HOD monomers by different cations and solvents has been determined by an IR spectroscopic method in diluted solutions (1 : 100) H-bonds or van der Waals interactions of HOD can increase by 1 0 until 450% depending on the cation position in the Hofmeister or lyo tropic ion series.The cause of this ion polarisation series is clarifi ed as similar to the series of the Coulomb field strength.-Methanol me asurements show the same cooperativity factors (cf.) as HOD within our error limits.Similar results were found with Lewis acids(L.a.)/methan ol/solvents interacting with H- bonds as well as with van der Waals in teractions.The series of L.a. of L.a. cfs. is at most only proportiona l to the Coulomb field strength of the cation parts in homologuous ser ies. The cfs. of L. a. are relatively large and seem to correlate with the solvolyse/hydrolyse or with catalytic properties.