title: Stereochemically stable double-helicate dinuclear complexes of bis(dipyrromethene)s: a chiroptical study.
abstract: Helical zinc(II) complexes of bis(dipyrromethene)s bearing homochiral amide substituents were synthesized. Analysis of the products by chiral HPLC showed two diastereomeric major products and showed that dipyrromethene double-nuclear helicates are stereochemically stable and do not interconvert. Circular dichroism (CD) studies showed that the complexation reactions had proceeded with modest diastereomeric excesses. Analysis of an analogous symmetric zinc(II) bis(dipyrromethene) lacking homochiral substituents that could act as chromophores discounted induced CD by the chiral auxiliaries.
authors.affiliation: Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4J3, Canada.
authors.forename: Tabitha E
authors.initials: TE
authors.lastname: Wood
authors.forename: Nathan D
authors.initials: ND
authors.lastname: Dalgleish
authors.forename: Erin D
authors.initials: ED
authors.lastname: Power
authors.forename: Alison
authors.initials: A
authors.lastname: Thompson
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Chen
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Okamoto