標題: Effects of ligand chain length and terminal N-alkylation on the protonation constants and stability constants of some transition metal complexes of linear tetraaza and pentaaza ligands
作者: Chang, CA
Shieh, FK
Liu, YL
Chung, CS
生物科技學系
Department of Biological Science and Technology
關鍵字: stability constants;transition metal ions;amine ligands;tetraaza ligands;pentaaza ligands;potentiometric titrations
公開日期: 1-Dec-1998
摘要: A number of terminal N-alkylated linear tetraaza and pentaaza ligands were prepared. Their ligand protonation constants and some transition and post-transition metal (Ni2+, Cu2+, Zn2+, and Cd2+) complex stability constants were determined by potentiometric titration methods. In general, methylation and ethylation at the terminal nitrogen atoms caused the corresponding ligand nitrogen basicity to increase; however, the corresponding metal complex stabilities were decreased compared to the non-alkylated structural analogs, presumably due to a steric effect.
URI: http://hdl.handle.net/11536/31704
ISSN: 0009-4536
期刊: JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume: 45
Issue: 6
起始頁: 753
結束頁: 759
Appears in Collections:Articles