Dr. Watson Loh
Instituto de Qui`mica
UNICAMP, Caixa Postal 6154
13083-970 - Campinas - SP Brazil
Tel.: + 55 19 788 7881
Fax: + 55 19 239 3805
E-mail : wloh@iqm.unicamp.br
> Conference report, Chem. Int.21(3), 77 (1999)