Molecular complexes of some sulfa drugs with chloro-p benzoquinones

ABSTRACT

The molecular complexes of sulfanilamide, sulfaguanidine, sulfapyridine, sulfadiazine, sulfamerazine, sulfadimidine and sulfathizole with chloranil and dichlorodicyano-p-benzoqunone have been prepared and investigated by IR, electronic absorption and proton magnetic resonance spectroscopy. Primary interaction between the different donors and acceptors is through pi-pi* electron transfer from the HOMO on the donor to the LUMO on the acceptor. In addition, pi-pi* and/or hydrogen bonding can be operative within the molecular complexes