- Title
- Complexation of the N,N',O-donor ligand N-trans-(2'-hydroxycyclohexyl)-2-aminomethylpyridine
- Creator
- Tiwow, Vanny; Lawrance, Geoffrey A.; Maeder, Marcel; Jensen, Paul
- Relation
- Journal of Coordination Chemistry Vol. 64, Issue 20, p. 3637-3651
- Publisher Link
- http://dx.doi.org/10.1080/00958972.2011.628019
- Publisher
- Taylor & Francis
- Resource Type
- journal article
- Date
- 2011
- Description
- The potentially tridentate N,N',O-donor N-trans-(2'hydroxycyclohexyl)-2-aminomethylpyridine (1) forms ML₂ complexes with M(II)=Cu, Ni, and Zn. X-ray crystal structures of the isostructural Ni(II) and Zn(II) complexes confirm bis-tridentate coordination in significantly distorted octahedral geometries as the all-cis facial isomer. Structural comparisons with the previously reported all-trans facial Cu(II) and cis,cis,trans(Npy) facial Co(III) complexes are presented. Protonation constants for 1 and stability constants with Cu(II), Ni(II), and Zn(II) are reported, with both ML and ML₂ species defined. The trend for ML (log K₁ values for Cu, Ni, and Zn of 8.3, 6.9, and 5.3, respectively) is conventional. Protonation and stability constants with Cu(II) for N,N-bis(2-pyridylmethyl)amine (2) were also defined. The log K₁ value measured for 2 of 7.4 is very similar to that found for 1 of 8.3, despite the marked difference in the third donor group; it appears that the third donor of the tridentate ligand generally binds only poorly to Jahn–Teller elongated Cu(II) in solution.
- Subject
- tridentate N,N' ,O-donor ligand; substituted aminomethylpyridine; metal(II) complexation; formation constants; x-ray crystal structures
- Identifier
- http://hdl.handle.net/1959.13/1063955
- Identifier
- uon:17417
- Identifier
- ISSN:1029-0389
- Language
- eng
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