Calixarenes and related macrocycles have received considerable attention for their host- guest chemistry and their ability to bind metals.'In contrast to the calix [n]-arenes, hexahomotrioxacalix [3larenes 1, abbreviated to “oxacalix [3larenes~'in this paper, have received little attention beyond reports of the isolation of the tert-butyloxacalix [3] arene la. 2- 4 In contrast to the numerous studies of metal complexation by calixarenes, there have ...