Polarizability effects and dispersion interactions in alkene-Br2 pi-complexes.
Weakly bound molecular complexes play an important role in chemistry, physics, and biodisciplines. The preequilibrium pi-complexes of various alkenes with bromine have been examined quantitatively, and a direct relationship between association constants (KF) of these pi-complexes and polarizability of the olefins was found. The stability of the Br2-olefin pi complexes is affected by both the donor ionization potential and the polarizability of the olefin, and an equation able to take into account both effects is proposed.
Chiappe
Cinzia
C
Dipartimento di Chimica Bioorganica e Biofarmacia, Università di Pisa, I-56126 Pisa, Italy. cinziac@farm.unipi.it
Detert
Heiner
H
Lenoir
Dieter
D
Pomelli
Christian Silvio
CS
Ruasse
Marie Françoise
MF