Stability of new pentadentate macrocyclic complexes : I — Complexes of 1-oxa-7,10-dithia-4,13-diazacyclopentadecane with some bivalent metals
✍ Scribed by F. Arnaud-Neu; M.J. Schwing-Weill
- Publisher
- Elsevier Science
- Year
- 1975
- Weight
- 259 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0020-1650
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## Abstract The stability constants of the Mn^2+^, Zn^2+^, Ni^2+^, pb^2+^, and Cd^2+^ complexes with 1,4,7‐triazacylononane‐1‐acetic acid (noma) were determined at 25° and 0.5M (KNO~3~) by potentiometric titrations. The species [ML] and [ML(OH)] were found in al cases except for Ni^2+^, whereas [ML
## Abstract NMR, potentiometric, and UV/VIS measurements were run to study the protonation and the In^3+^ and Cu^2+^ stability constants of 1,4,7,10‐tetraazacyclododecane‐1,4,7‐triacetic acid (do3a, L). The protonation of do3a follows the typical scheme with two high and several low log __K__~H~ va