Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II)
A new mononuclear Ru(II) complex of formula [Ru(NH3)4(2-PCA)](PF6)2, (1), with 2-PCA = 2-pyridinealdazine, has been synthesized and characterized by spectroscopic and electrochemical techniques. The complete structure of (1) was determined by X-ray diffraction. A strong π-backbonding effect dπ(Ru) →...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_13877003_v80_n_p69_Cattaneo |
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todo:paper_13877003_v80_n_p69_Cattaneo2023-10-03T16:12:33Z Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II) Cattaneo, M. Alborés, P. Fagalde, F. Katz, N.E. A new mononuclear Ru(II) complex of formula [Ru(NH3)4(2-PCA)](PF6)2, (1), with 2-PCA = 2-pyridinealdazine, has been synthesized and characterized by spectroscopic and electrochemical techniques. The complete structure of (1) was determined by X-ray diffraction. A strong π-backbonding effect dπ(Ru) → π *(2-PCA) is disclosed in (1) by the high value of the RuIII/RuII redox potential and the short Ru-N(imine) bond length, which leads to a weakened N[sbnd]N bond in coordinated 2-PCA compared to that of the free ligand and thus to an enhanced reactivity in acidic media. In effect, the product of the reaction of excess Ru with 2-PCA is not the dinuclear species bridged by 2-PCA, but the already known 2-iminopyridine complex of tetraammineruthenium(II). DFT and TD-DFT calculations of (1) were consistent with experimental results and allowed the complete assignment of its UV–Visible bands. © 2017 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13877003_v80_n_p69_Cattaneo |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
A new mononuclear Ru(II) complex of formula [Ru(NH3)4(2-PCA)](PF6)2, (1), with 2-PCA = 2-pyridinealdazine, has been synthesized and characterized by spectroscopic and electrochemical techniques. The complete structure of (1) was determined by X-ray diffraction. A strong π-backbonding effect dπ(Ru) → π *(2-PCA) is disclosed in (1) by the high value of the RuIII/RuII redox potential and the short Ru-N(imine) bond length, which leads to a weakened N[sbnd]N bond in coordinated 2-PCA compared to that of the free ligand and thus to an enhanced reactivity in acidic media. In effect, the product of the reaction of excess Ru with 2-PCA is not the dinuclear species bridged by 2-PCA, but the already known 2-iminopyridine complex of tetraammineruthenium(II). DFT and TD-DFT calculations of (1) were consistent with experimental results and allowed the complete assignment of its UV–Visible bands. © 2017 Elsevier B.V. |
| format |
JOUR |
| author |
Cattaneo, M. Alborés, P. Fagalde, F. Katz, N.E. |
| spellingShingle |
Cattaneo, M. Alborés, P. Fagalde, F. Katz, N.E. Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II) |
| author_facet |
Cattaneo, M. Alborés, P. Fagalde, F. Katz, N.E. |
| author_sort |
Cattaneo, M. |
| title |
Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II) |
| title_short |
Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II) |
| title_full |
Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II) |
| title_fullStr |
Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II) |
| title_full_unstemmed |
Strong metal-to-ligand π-backbonding weakens the N[sbnd]N bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II) |
| title_sort |
strong metal-to-ligand π-backbonding weakens the n[sbnd]n bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(ii) |
| url |
http://hdl.handle.net/20.500.12110/paper_13877003_v80_n_p69_Cattaneo |
| work_keys_str_mv |
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