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EnglishThe heats of formation of Ni complexes with tetraaza macrocyclic ligands of varying ring size, (12-15 members) were detd. by destroying the complexes in aq. soln. with alk. cyanide. The octahedral-square-planar equil. were investigated, and the results are presented as ΔH° for both octahedral, blue and when possible, square-planar, yellow species. Like the Cu(II) system, the blue, octahedral series exhibits a max. in ΔH° with [14]aneN4. This is discussed in terms of the relative size of the ligand and the metal ion. The unexpected reversal of ΔH° for the 2 square-planar complexes is rationalized in terms of expected ligand transformations.
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| Titolo: | A microcalorimetric determination of the enthalpies of formation in solution of nickel(II) complexes with tetraaza macrocyclic ligands of varying size | |
| Autori: | ||
| Data di pubblicazione: | 1980 | |
| Rivista: | ||
| Abstract: | The heats of formation of Ni complexes with tetraaza macrocyclic ligands of varying ring size, (12-15 members) were detd. by destroying the complexes in aq. soln. with alk. cyanide. The octahedral-square-planar equil. were investigated, and the results are presented as ΔH° for both octahedral, blue and when possible, square-planar, yellow species. Like the Cu(II) system, the blue, octahedral series exhibits a max. in ΔH° with [14]aneN4. This is discussed in terms of the relative size of the ligand and the metal ion. The unexpected reversal of ΔH° for the 2 square-planar complexes is rationalized in terms of expected ligand transformations. | |
| Handle: | http://hdl.handle.net/11571/462436 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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