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Tretiakov S, Damen JAM, Lutz M, Moret ME. A dianionic C 3-symmetric scorpionate: synthesis and coordination chemistry. Dalton Trans 2020; 49:13549-13556. [PMID: 32941574 DOI: 10.1039/d0dt02601h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Introducing charges into ligand systems fine-tunes their electronic properties and influences the solubility of their metal complexes. Herein, we present a synthesis of a dianionic, C3-symmetric ligand combining three anionic N-donors tethered to a positively charged phosphonium center. The tris-skatylmethylphosphonium (TSMP) ligand, isolated in the form of its dipotassium salt TSMPK2, is the first dianionic homoscorpionate capable of metal exchange. The potassium cations in TSMPK2 are exchangeable for other metals, which results in rich coordination chemistry. Thus, the ligand displays a bridging μ2:κ2:κ1 coordination mode with trigonal planar Cu(i) centers in the tetrameric complex [(TSMP)Cu]44-. The κ3 mode is accessed upon addition of 1 equiv. of P(OEt)3 per Cu(i) to yield the tetrahedral monomeric complex [(TSMP)CuP(OEt)3]-. Both Fe(ii) and Ni(ii) in pyridine give octahedral high-spin κ3 complexes with composition (TSMP)M(Py)3 (M = Fe, Ni). Displacement of three pyridine ligands in (TSMP)Fe(Py)3 for a second equivalent of TSMP gives a high-spin pseudotetrahedral 2 : 1 complex [(TSMP)2Fe]2- with the ligands in κ2 coordination mode. The reduction in coordination number is likely due to electrostatic repulsion of the negatively-charged indolides as well as their weaker π-accepting character as compared to pyridine.
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Affiliation(s)
- Serhii Tretiakov
- Utrecht University, Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, 3584 CG Utrecht, The Netherlands.
| | - Johannes A M Damen
- Utrecht University, Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, 3584 CG Utrecht, The Netherlands.
| | - Martin Lutz
- Utrecht University, Crystal and Structural Chemistry, Bijvoet Centre for Biomolecular Research, Faculty of Science, 3584 CH Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Utrecht University, Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, 3584 CG Utrecht, The Netherlands.
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Guo Z, Liu F, Tong H, Chao J, Wang H, Zhou M. 1,3,5-Triazapentadienyltin(II) complexes and the additional reaction of phenylamine with N,N'-diisopropylcarbodiimide. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Singh S, Wang G, Mao JX, Flores JA, Kou X, Campana C, Kroll P, Dias HVR. Gold(I) Complexes [N{(C
3
F
7
)C(Dipp)N}
2
]AuL (L = Ethylene,
tert
‐Butyl Isocyanide, Tetrahydrothiophene, Triphenylphosphine) and Different Triazapentadienyl Ligand Coordination Modes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shreeyukta Singh
- Department of Chemistry and BiochemistryThe University of Texas at Arlington76019ArlingtonTexasUSA
| | - Guocang Wang
- Department of Chemistry and BiochemistryThe University of Texas at Arlington76019ArlingtonTexasUSA
| | - James X. Mao
- Department of Chemistry and BiochemistryThe University of Texas at Arlington76019ArlingtonTexasUSA
| | - Jaime A. Flores
- Department of Chemistry and BiochemistryThe University of Texas at Arlington76019ArlingtonTexasUSA
| | - Xiaodi Kou
- Department of Chemistry and BiochemistryThe University of Texas at Arlington76019ArlingtonTexasUSA
| | - Charles Campana
- Single Crystal DiffractionBruker AXS Inc.53711MadisonWisconsinUSA
| | - Peter Kroll
- Department of Chemistry and BiochemistryThe University of Texas at Arlington76019ArlingtonTexasUSA
| | - H. V. Rasika Dias
- Department of Chemistry and BiochemistryThe University of Texas at Arlington76019ArlingtonTexasUSA
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4
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Duan XE, Tong HB, Wei XH, Shi HP, Bai SD, Bai T, Zhang J, Zhang YB, Liu DS. Coordination reactions of 2-pyridinecarboxaldehyde-phenylhydrazonatolithium with selected transition metal (Zn, Sn, Fe, Co, Ni and Zr) chlorides and its coupling reaction with dichloromethane. Dalton Trans 2016; 45:11061-70. [PMID: 27327837 DOI: 10.1039/c6dt01183g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactions of 2-pyridinecarboxaldehyde-phenylhydrazonatolithium C5H4Npy-CH[double bond, length as m-dash]Ni-NaLi(Ph) (abbreviated as Li) with a 1/2 equivalent of anhydrous metal (Zn, Sn, Fe and Co) chlorides or NiCl2(DME) (DME = 1, 2-dimethoxyethane) produced the corresponding mononuclear metal(ii) complexes ( and ), in which each ligand acts as a bidentate ligand and the coordination geometries around the metals are shown to be tetrahedral within the complexes , , and , respectively, and a tetragonal pyramid in the complex . The reaction of Li successively with sodium tert-butoxide and anhydrous ZrCl4 afforded the unanticipated bizirconium complex , in which each monoanionic ligand behaves as a tridentate bridge. Whereas treatment of Li with NiCl2 and then CH2Cl2 led to an interesting methylene-bridged bis(2-pyridyl-phenylhydrazone) compound in moderate yield; a comparative experiment showed that when the Li reacted with CH2Cl2, the coupling compound was also obtained but in very low yield. A plausible mechanism of compound formation was also proposed and supported by the density functional theory (DFT) calculations. All the synthesized compounds were characterized by single-crystal X-ray diffraction.
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Affiliation(s)
- Xin-E Duan
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Hong-Bo Tong
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, P. R. China.
| | - Xue-Hong Wei
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China.
| | - He-Ping Shi
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Sheng-Di Bai
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, P. R. China.
| | - Tao Bai
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Jing Zhang
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, P. R. China.
| | - Yong-Bin Zhang
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, P. R. China.
| | - Dian-Sheng Liu
- Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, P. R. China.
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Travieso-Puente R, Broekman JOP, Chang MC, Demeshko S, Meyer F, Otten E. Spin-Crossover in a Pseudo-tetrahedral Bis(formazanate) Iron Complex. J Am Chem Soc 2016; 138:5503-6. [DOI: 10.1021/jacs.6b01552] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Raquel Travieso-Puente
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - J. O. P. Broekman
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Mu-Chieh Chang
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Serhiy Demeshko
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße
4, 37077 Göttingen, Germany
| | - Franc Meyer
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße
4, 37077 Göttingen, Germany
| | - Edwin Otten
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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Kulkarni NV, Das A, Ridlen SG, Maxfield E, Adiraju VAK, Yousufuddin M, Dias HVR. Fluorinated triazapentadienyl ligand supported ethyl zinc(ii) complexes: reaction with dioxygen and catalytic applications in the Tishchenko reaction. Dalton Trans 2016; 45:4896-906. [PMID: 26875862 DOI: 10.1039/c6dt00257a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ethyl zinc complexes [N{(C3F7)C(Dipp)N}2]ZnEt, [N{(C3F7)C(Cy)N}2]ZnEt, [N{(CF3)C(2,4,6-Br3C6H2)N}2]ZnEt and [N{(C3F7)C(2,6-Cl2C6H3)N}2]ZnEt have been synthesized from the corresponding 1,3,5-triazapentadiene and diethyl zinc. X-ray data show that [N{(C3F7)C(Dipp)N}2]ZnEt has a distorted trigonal planar geometry at the zinc center. The triazapentadienyl ligand binds to zinc in a κ(2)-mode. The zinc-ethyl bonds of [N{(C3F7)C(Dipp)N}2]ZnEt, [N{(C3F7)C(Cy)N}2]ZnEt, [N{(CF3)C(2,4,6-Br3C6H2)N}2]ZnEt and [N{(C3F7)C(2,6-Cl2C6H3)N}2]ZnEt readily undergo oxygen insertion upon exposure to dry air to produce the corresponding zinc-ethoxy or zinc-ethylperoxy compounds. The ethoxy zinc adducts {[N{(CF3)C(2,4,6-Br3C6H2)N}2]ZnOEt}2 and {[N{(C3F7)C(2,6-Cl2C6H3)N}2]ZnOEt}2 as well as the ethylperoxy zinc adduct {[N{(C3F7)C(Cy)N}2]ZnOOEt}2 have been isolated and fully characterized by several methods including X-ray crystallography. They feature dinuclear structures with four-coordinate zinc sites and bridging-ethoxy or -ethylperoxy groups. The ethyl zinc complexes catalyze the Tishchenko reaction of benzaldehyde under solventless conditions affording benzyl benzoate. The reaction of ethyl zinc complexes with dioxygen and their catalytic behaviour in the Tishchenko reaction are affected by the electronic and steric factors of the triazapentadienyl ligand. {[N{(C3F7)C(Cy)N}2]ZnOOEt}2 is an excellent reagent for the epoxidation of trans-chalcone.
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Affiliation(s)
- Naveen V Kulkarni
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
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Li F, Yan L, Tong H, Zhou M. Crystal structure of [1-(2,6-diiso-propyl-phen-yl)-2,4-bis-(di-methyl-amino)-5-tri-methyl-silyl-1,3,5-tri-aza-penta-dienyl-κ(2) N (1),N (5)](tri-phenyl-phosphane-κP)copper(I). Acta Crystallogr E Crystallogr Commun 2015; 71:m54. [PMID: 25844205 PMCID: PMC4350696 DOI: 10.1107/s2056989015002169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 02/02/2015] [Indexed: 11/25/2022]
Abstract
The title complex, [Cu(C21H38N5Si)(C18H15P)], was obtained from the one-pot reaction between (Dipp)N(Li)SiMe3 (Dipp = 2,6-diiso-propyl-phen-yl), Me2NCN, CuCl and PPh3. The Cu(I) atom has a distorted trigonal-planar coordination sphere. The tri-aza-penta-dienyl ligand acts as a κ(2)-donor. The N-Cu-N bond angle is 95.88 (14)°. In the tri-aza-penta-dienyl fragment, the C-N bond lengths are in the range 1.328 (5)-1.349 (5) Å, which indicates delocalization of the π-electrons in the NCNCN system.
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Affiliation(s)
- Feiguang Li
- Institute of Applied Chemistry, Shanxi University, Taiyuan, Shanxi 030006, People’s Republic of China
| | - Lei Yan
- Institute of Applied Chemistry, Shanxi University, Taiyuan, Shanxi 030006, People’s Republic of China
| | - Hongbo Tong
- Institute of Applied Chemistry, Shanxi University, Taiyuan, Shanxi 030006, People’s Republic of China
| | - Meisu Zhou
- Institute of Applied Chemistry, Shanxi University, Taiyuan, Shanxi 030006, People’s Republic of China
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