Two chiral metal clusters derived from nucleophilic addition of L-proline to di-2-pyridyl ketone.
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.
Li
Yamin
Y
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
Xiang
Shengchang
S
Sheng
Tianlu
T
Zhang
Jianjun
J
Hu
Shengmin
S
Fu
Ruibiao
R
Huang
Xihe
X
Wu
Xintao
X