title: Anion receptors containing thiazine-1,1-dioxide heterocycles as hydrogen bond donors.
abstract: The synthesis, X-ray crystal structures and anion recognition properties of two receptors containing thiazine-1,1-dioxide heterocycles as hydrogen bond donating subunits are reported. The newly synthesized receptors display much different anion selectivities in acetone-d₆ than N,N'-diphenyl-1,3-disulfonamidobenzene that was used as a comparison. The selectivity exhibited by one of the new receptors for chloride anions can be attributed to greater steric demand in the cleft formed, in part, by its terminal phenyl rings; an effect that is absent in the comparison receptor.
authors.affiliation: Department of Chemistry, University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada.
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Wang
authors.forename: James A
authors.initials: JA
authors.lastname: Wisner
authors.forename: Michael C
authors.initials: MC
authors.lastname: Jennings