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Korb M, Ghazvini SMBH, Low PJ. Migration of Condensed Aromatic Hydrocarbons During Alkyne-Vinylidene Rearrangements. Chemistry 2024:e202400930. [PMID: 38780030 DOI: 10.1002/chem.202400930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 05/25/2024]
Abstract
Diarylacetylenes ArC≡CAr featuring condensed aromatic hydrocarbon fragments (Ar) such as naphthalene, anthracene, phenanthrene and pyrene were converted into vinylidene ligands by 1,2-migration reactions within the coordination sphere of half-sandwich complexes [MII(dppe)Cp]+ (MII = RuII, FeII). Comparison of the extent of conversion of the alkyne substrates to the vinylidene complexes [Ru{=C=CAr2}(dppe)Cp]+ with those obtained from acetylenes functionalized by smaller groups (H, CH3, Ph) show that the molecular volume (VM) of the migrating group and relief of steric congestion plays a role during the rearrangement process. Conversely, the H-atoms from the larger condensed ring aryl groups that are in close proximity to the migrating sites also have a significant influence on the efficacy and extent of the reaction by restricting access of the alkyne to the metal center, resulting in a less effective migration reaction. This combination of competing steric factors (acceleration due to relief of steric congestion and restricted access of the alkyne moiety to the reaction site) is exemplified by the facile migration of 1-pyryl entities and the low yields of vinylidene products formed from 1,2-bis(9-anthryl)acetylene.
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Affiliation(s)
- Marcus Korb
- School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Seyed M B H Ghazvini
- School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Paul J Low
- School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
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Abstract
Phosphorus mononitride (PN) only has a fleeting existence on Earth, and molecular precursors for the release of this molecule under mild conditions in solution have remained elusive. Here we report the synthesis of an anthracene-based precursor-an anthracene moiety featuring an azidophosphine bridge across its central ring-that dissociates into dinitrogen, anthracene and P≡N in solution with a first-order half-life of roughly 30 min at room temperature. Heated under reduced pressure, this azidophosphine-anthracene precursor decomposes in an explosive fashion at around 42 °C, as demonstrated in a molecular-beam mass spectrometry study. The precursor is also shown to serve as a PN transfer reagent in the synthesis of an Fe-NP coordination complex, through ligand exchange with its Fe-N2 counterpart. The terminal N-bonded complex was found to be energetically preferred, compared to its P-bonded linkage isomer, owing to a significant covalent Fe-pnictogen bond character and an associated less unfavourable Pauli repulsion in the metal-ligand interaction.
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Reductive Electropolymerization and Electrochromism of Iron(II) Complex with Styrene-Based Ligand. MATERIALS 2021; 14:ma14174831. [PMID: 34500920 PMCID: PMC8432686 DOI: 10.3390/ma14174831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 11/22/2022]
Abstract
The benzimidazole-based ligand containing polymerizable styrene group has been prepared via condensation of picolinaldehyde derivative containing styrene moiety and benzimidazole-based hydrazine. The ligand reacted with iron(II) tetrafluoroborate and iron(II) trifluoromethanesulfonate giving red-brown complexes of Fe(II) ions of formula [FeL2]X2, where X = CF3SO3− (1) or BF4− (2). Reductive electropolymerization was used to obtain a thin layer of the polymeric complex, poly-1. Further investigation of electrochemical properties of the compound by cyclic voltammetry showed two quasi-reversible redox processes assigned to electrooxidation and electroreduction of the polymer. Spectroelectrochemical measurements confirmed that the polymer undergoes the color changes during oxidation and reduction process. The polymer in its neutral state (Fe(II)) is yellow and it exhibits absorption band at 370 nm, after oxidation to Fe(III) state absorption band shifts to 350 nm and the polymer is almost colorless. While the metal ions are reduced to Fe(I) absorption band at around 410 nm has been observed and the polymer changed its color to intense yellow. The stability of the polymer during multiple oxidation/reduction cycles has also been investigated.
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Pan Y, Schnierle M, Auweiler D, Ringenberg MR. Electrochemical Reduction Mechanism of [(η 5-C 5H 5)Fe(dppf)(CO)] + (dppf = 1,1′-Bis(diphenylphosphino)ferrocene). Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yixian Pan
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Marc Schnierle
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Daniel Auweiler
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Mark R. Ringenberg
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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Korb M, Hosseini Ghazvini SMB, Moggach SA, Meunier JF, Bousseksou A, Low PJ. Rip It off: Nitro to Nitroso Reduction by Iron Half-Sandwich Complexes. Inorg Chem 2021; 60:4986-4995. [DOI: 10.1021/acs.inorgchem.1c00042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Marcus Korb
- The University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| | | | - Stephen A. Moggach
- The University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| | - Jean-François Meunier
- CNRS, Université de Toulouse, Laboratoire de Chimie de Coordination, 205 route de Narbonne, 31077 Toulouse, France
| | - Azzedine Bousseksou
- CNRS, Université de Toulouse, Laboratoire de Chimie de Coordination, 205 route de Narbonne, 31077 Toulouse, France
| | - Paul J. Low
- The University of Western Australia, School of Molecular Sciences, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
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Kumah RT, Vijayan P, Ojwach SO. Synthesis and Applications of (Pyridyl)imine Fe(II) Complexes as Catalysts in Transfer Hydrogenation of Ketones. Catal Letters 2021. [DOI: 10.1007/s10562-020-03311-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Dissanayake DMMM, Petel BE, Brennessel WW, Bren KL, Matson EM. Hydrogen bonding promotes diversity in nitrite coordination modes at a single iron(II) center. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1821373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Brittney E. Petel
- Department of Chemistry, University of Rochester, Rochester, NY, USA
| | | | - Kara L. Bren
- Department of Chemistry, University of Rochester, Rochester, NY, USA
| | - Ellen M. Matson
- Department of Chemistry, University of Rochester, Rochester, NY, USA
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Kubo K, Yuasa T, Yokoichi A, Matsugi T, Morikawa Y, Kume S, Mizuta T. Synthesis and Structures of Iron(II) Metallacycles Based on a PNPNP Framework. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuyuki Kubo
- Basic Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Takahiro Yuasa
- Basic Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Aya Yokoichi
- Basic Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Takeru Matsugi
- Basic Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Yoshihiko Morikawa
- Basic Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Shoko Kume
- Basic Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Tsutomu Mizuta
- Basic Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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Irzoqi AA, Salih MM, Jirjes HM, Mensoor MK. Synthesis, Characterization, and Antibacterial Activity of Complexes of Hg(II) with Mixtures of 3-Hydrazonoindolin-2-one and Diphosphine, or Diimine Ligands. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220060213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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