title: Two chiral metal clusters derived from nucleophilic addition of L-proline to di-2-pyridyl ketone.
abstract: In the presence of cobalt (nickel) acetate, a chiral tetrahedral intermediate ligand of (S)-(C5NH4)2C(OH)(C4NH7CO2H) was first formed from the nucleophilic addition of l-proline as a secondary amine to ketone (di-2-pyridyl ketone). Based on the ligand synthesized in situ, two chiral tetranuclear isomorphous complexes 1 and 2 with the formula {Na[M4L3(OAc)3](ClO4)(1.5)(H2O)(1.5)}(ClO4)(OH)(0.5).3H2O (M = Co, Ni) have been achieved. The Co4 cluster (1) behaves as a ferromagnet.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
authors.forename: Yamin
authors.initials: Y
authors.lastname: Li
authors.forename: Shengchang
authors.initials: S
authors.lastname: Xiang
authors.forename: Tianlu
authors.initials: T
authors.lastname: Sheng
authors.forename: Jianjun
authors.initials: J
authors.lastname: Zhang
authors.forename: Shengmin
authors.initials: S
authors.lastname: Hu
authors.forename: Ruibiao
authors.initials: R
authors.lastname: Fu
authors.forename: Xihe
authors.initials: X
authors.lastname: Huang
authors.forename: Xintao
authors.initials: X
authors.lastname: Wu