“栅栏”型卟啉铁(Ⅱ)、钴(Ⅱ)配合物的轴向配位性能

Axial Coordination Properties of Picket Fence Porphyrin Iron(Ⅱ)and Cobalt(Ⅱ) Complexes

以可见一紫外分光光度法测定“栅栏”型卟啉铁(Ⅱ)、钴(Ⅲ)与某些含氮配体作用的平衡常进,以红外光谱法测定它们的羰基配合物的C—O振动频率。结果表明:卟啉铁(Ⅱ)与含氮配体的平衡常数既与配体的碱性有关,也与配体的空间位阻有关;卟啉铁(Ⅱ)与配体的平衡常数大于卟啉钴(Ⅲ)。

The equilibrium constants of picket frnce porphyrin iron(Ⅱ) and Cobalt(Ⅱ) complexes with some nitrogenous ligands were determined by UV spectrophotometry. The vc-o of their car-bonyl complexes were determined by IR spectrophotometry. The euqilibrium constants of porphyrin iron (Ⅱ) with nitrogenous ligands are related to the basicity and steric hindrance of ligands. The equilibrium constants of porphyrin iron(Ⅱ ) with ligands are greater much than porphyrin cobalt(Ⅱ)' s.