title: Steric control of a bridging ligand for high-nuclearity metallamacrocycle formation: a highly puckered 60-membered icosanuclear metalladiazamacrocycle.
abstract: A novel S4-symmetric icosanuclear manganese metalladiazamacrocycle was synthesized using a pentadentate ligand, N-3-phenyl-trans-2-propenoylsalicylhydrazide (H3L), that has a rigid and bulky terminal N-acyl group. A 20 cyclic repeat of an--(Mn-N-N)--linkage resulted in a highly puckered diaza-bridged 60-membered icosanuclear metallamacrocycle. The steric interaction between the ligands in the cyclic system leads to five consecutive Mn(III) centers in a chemically different--(Mn(A)Mn(B)Mn(C)Mn(D)Mn(E))--environment, with the chiralities of the metal centers being in a rather complicated--(LambdaLambdaDeltaLambdaLambda)(DeltaDeltaLambdaDeltaDelta)--sequence.
authors.affiliation: Department of Chemistry and Applied Chemistry, Hanyang University, Ansan, Kyunggi-do 426-791, Korea.
authors.forename: Dohyun
authors.initials: D
authors.lastname: Moon
authors.forename: Kyungjae
authors.initials: K
authors.lastname: Lee
authors.forename: Rohith P
authors.initials: RP
authors.lastname: John
authors.forename: Ghyung Hwa
authors.initials: GH
authors.lastname: Kim
authors.forename: Byoung Jin
authors.initials: BJ
authors.lastname: Suh
authors.forename: Myoung Soo
authors.initials: MS
authors.lastname: Lah