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Ramuglia AR, Zink JR, Warhausen AJ, Abucayon E, Xu N, Shrestha K, Richter-Addo G, Shaw MJ. Electrochemical and spectroelectrochemical investigation of Ru(por)(NO)(OAr) derivatives (por = octaethylporphyrin, tetraanisolylporphyrin; Ar = Ph, C 6H 4-2-NHC(O)CF 3; C 6H 3-2,6-(NHC(O)CF 3) 2). Dalton Trans 2025; 54:3444-3455. [PMID: 39844611 DOI: 10.1039/d4dt02764g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2025]
Abstract
The electrochemistry and spectroelectrochemistry of Ru(porphyrin)(NO)(phenoxide) complexes Ru(por)(NO)(OPh) (por = OEP, 1a; TAP, 2a; Ph = C6H5), Ru(por)(NO)(OAr1) (por = OEP, 1b; TAP, 2b; OAr1 = -OC6H4-(2-NHC(O)CF3)), Ru(por)(NO)(OAr2) (por = OEP, 1c; TAP, 2c; OAr2 = OC6H3-(2,6-NHC(O)CF3)2; OEP = octaethylporphyrinato dianion, TAP = tetraanisolylporphyrinato dianion) indicate that initial one-electron oxidation results in structure-dependent net reactivity at the phenoxide ligand. Oxidation of 1a generates 1a+, which undergoes a relatively slow rate-limiting second-order follow-up reaction. In contrast, 2a undergoes a diffusion-limited follow-up reaction after oxidation. Oxidation of species 1b and 2b results in dissociation of the corresponding phenoxide radicals from the metal center following a relatively slow first-order kinetic process. The ˙OAr1 radical was detected by EPR spectroelectrochemistry. The follow-up reactions after oxidation of 1c and 2c are also very fast. In all cases, the ultimate fate of the ruthenium complex is to be trapped with adventitious water to generate the stable aqua complex. Further oxidation of each compound at higher potentials occurs at the porphyrin ligand, generating the π-radical cation observed by IR spectroelectrochemistry.
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Affiliation(s)
- Anthony R Ramuglia
- Department of Chemistry, Southern Illinois University Edwardsville, Edwardsville, IL, 62025-1652 USA.
| | - Jeremy R Zink
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, USA
| | - Adam J Warhausen
- Department of Chemistry, Saginaw Valley State University, 7400 Bay Road, University Center, MI 48710, USA
| | - Erwin Abucayon
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, USA
| | - Nan Xu
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, USA
| | - Kailash Shrestha
- Department of Chemistry, Southern Illinois University Edwardsville, Edwardsville, IL, 62025-1652 USA.
| | - George Richter-Addo
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, OK 73019, USA
| | - Michael J Shaw
- Department of Chemistry, Southern Illinois University Edwardsville, Edwardsville, IL, 62025-1652 USA.
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Demissie TB, Conradie J, Vazquez-Lima H, Ruud K, Ghosh A. Rare and Nonexistent Nitrosyls: Periodic Trends and Relativistic Effects in Ruthenium and Osmium Porphyrin-Based {MNO} 7 Complexes. ACS OMEGA 2018; 3:10513-10516. [PMID: 31459176 PMCID: PMC6645279 DOI: 10.1021/acsomega.8b01434] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 08/14/2018] [Indexed: 05/26/2023]
Abstract
Relativistic and nonrelativistic density functional theory calculations were used to investigate rare or nonexistent ruthenium and osmium analogues of nitrosylhemes. Strong ligand field effects and, to a lesser degree, relativistic effects were found to destabilize {RuNO}7 porphyrins relative to their {FeNO}7 analogues. Substantially stronger relativistic effects account for the even greater instability and/or nonexistence of {OsNO}7 porphyrin derivatives.
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Affiliation(s)
- Taye B. Demissie
- Department
of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Tromsø—The Arctic University
of Norway, N-9037 Tromsø, Norway
- Materials
Science Program, Department of Chemistry, Addis Ababa University, Addis
Ababa, Ethiopia
| | - Jeanet Conradie
- Department
of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Tromsø—The Arctic University
of Norway, N-9037 Tromsø, Norway
- Department
of Chemistry, University of the Free State, P.O. Box 339, 9300 Bloemfontein, Republic of South Africa
| | - Hugo Vazquez-Lima
- Department
of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Tromsø—The Arctic University
of Norway, N-9037 Tromsø, Norway
| | - Kenneth Ruud
- Department
of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Tromsø—The Arctic University
of Norway, N-9037 Tromsø, Norway
| | - Abhik Ghosh
- Department
of Chemistry and Hylleraas Centre for Quantum Molecular Sciences, University of Tromsø—The Arctic University
of Norway, N-9037 Tromsø, Norway
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Orlowska E, Babak MV, Dömötör O, Enyedy EA, Rapta P, Zalibera M, Bučinský L, Malček M, Govind C, Karunakaran V, Farid YCS, McDonnell TE, Luneau D, Schaniel D, Ang WH, Arion VB. NO Releasing and Anticancer Properties of Octahedral Ruthenium–Nitrosyl Complexes with Equatorial 1H-Indazole Ligands. Inorg Chem 2018; 57:10702-10717. [DOI: 10.1021/acs.inorgchem.8b01341] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ewelina Orlowska
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
| | - Maria V. Babak
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore
| | - Orsolya Dömötör
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dom ter 7, H-6720 Szeged, Hungary
| | - Eva A. Enyedy
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dom ter 7, H-6720 Szeged, Hungary
| | - Peter Rapta
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Michal Zalibera
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Lukáš Bučinský
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
| | - Michal Malček
- Slovak University of Technology, Institute of Physical Chemistry and Chemical Physics, Radlinského 9, SK-81237 Bratislava, Slovakia
- LAQV@REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - Chinju Govind
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019 Kerala India
| | - Venugopal Karunakaran
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019 Kerala India
| | | | - Tara E. McDonnell
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Kensington, Sydney, New South Wales 2052, Australia
| | - Dominique Luneau
- Laboratoire des Multimatériaux et Interfaces (UMR5615), Université Claude Bernard Lyon 1, Campus de la Doua, 69622 Villeurbanne Cedex, France
| | | | - Wee Han Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 2, 117543 Singapore
| | - Vladimir B. Arion
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
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