Bl. Poh et Yy. Ng, COMPLEXATION OF AROMATIC-HYDROCARBONS WITH A MACROCYCLE CONTAINING 4 TROPOLONE UNITS IN WATER, Tetrahedron, 53(34), 1997, pp. 11913-11918
The stability constants EC of nine complexes formed from aromatic hydr
ocarbons and the macrocycle 1 in water were measured by the transport
method (H-1 nmr spectroscopy was used in the case of benzene as guest)
. Their values increase with the number of aromatic rings in the aroma
tic hydrocarbons. A value of -1.5 Kcal mol(-1) was obtained for the ar
omatic pi-pi interaction energy at 25 degrees C. (C) 1997 Elsevier Sci
ence Ltd.