- 作者: 陳秋炳 ; 黃耀興 ; 黃瑞賢
- 作者服務機構: 清華大學化學系
- 中文摘要: The proton paramagnetic shifts of low spin N,N'-ethylenebis(salicylideniminato)cobalt(II) and its derivatives were studied to understand the effect of substituents at the azomethine carbon on the electronic structure of the Schiff-base cobalt complexes. Analysis of the /sup 1/H paramagnetic shifts of H and CH/sub 3/ bonded to the azomethine carbon reveals that spin delocalization through .sigma. interaction is responsible for the contact contribution to the paramagnetics shift. When the phenyl group is bonded to the azomethine carbon, the plane of the phenyl group is perpendicular to the plane of the complex and the phenyl group makes a negligible contact contribution to the paramagnetic shift.
- 英文摘要: --
- 中文關鍵字: Co(Salen); Co(8-Me-Salen); Co(8-Ph-Salen); Paramagnetic Shift; Schiff Base; Cobalt(Ii) Complex; N,N'-Ethylenebis(Salicyclideniminato)
- 英文關鍵字: 席夫鹼;鈷(II)錯化合物;順磁位移