1
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Cranswick MA, Sperber EC, Houser RP, Farquhar ER. Isolation and characterization of a bis(dithiolene)-supported tungsten-acetylenic complex as a model for acetylene hydratase. J Inorg Biochem 2024; 255:112543. [PMID: 38554579 DOI: 10.1016/j.jinorgbio.2024.112543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/07/2024] [Accepted: 03/23/2024] [Indexed: 04/01/2024]
Abstract
Acetylene hydratase is currently the only known mononuclear tungstoenzyme that does not catalyze a net redox reaction. The conversion of acetylene to acetaldehyde is proposed to occur at a W(IV) active site through first-sphere coordination of the acetylene substrate. To date, a handful of tungsten complexes have been shown to bind acetylene, but many lack the bis(dithiolene) motif of the native enzyme. The model compound, [W(O)(mnt)2]2-, where mnt2- is 1,2-dicyano-1,2-dithiolate, was previously reported to bind an electrophilic acetylene substrate, dimethyl acetylenedicarboxylate, and characterized by FT-IR, UV-vis, potentiometry, and mass spectrometry (Yadav, J; Das, S. K.; Sarkar, S., J. Am. Chem. Soc., 1997, 119, 4316-4317). By slightly changing the electrophilic acetylene substrate, an acetylenic-bis(dithiolene)‑tungsten(IV) complex has been isolated and characterized by FT-IR, UV-vis, NMR, X-ray diffraction, and X-ray absorption spectroscopy. Activation parameters for complex formation were also determined and suggest coordination-sphere reorganization is a limiting factor in the model complex reactivity.
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Affiliation(s)
- Matthew A Cranswick
- Department of Chemistry, Colorado State University Pueblo, Pueblo, CO 81001, USA.
| | - E Christine Sperber
- Department of Chemistry, Colorado State University Pueblo, Pueblo, CO 81001, USA
| | - Robert P Houser
- Department of Chemistry and Biochemistry, University of Northern Colorado, Greeley, CO 80639, USA
| | - Erik R Farquhar
- Case Western Reserve University Center for Synchrotron Biosciences, National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA.
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2
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Ehweiner MA, Belaj F, Mösch-Zanetti NC. Synthesis and structure of two isomers of a molybdenum(II) 2-butyne complex stabilized by bioinspired S, N-bidentate ligands. ACTA CRYSTALLOGRAPHICA SECTION C STRUCTURAL CHEMISTRY 2022; 78:218-222. [PMID: 35380124 PMCID: PMC8981119 DOI: 10.1107/s2053229622002029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/21/2022] [Indexed: 11/11/2022]
Abstract
Two isomers of the molybdenum(II) complex Mo(CO)(C2Me2)(S-Phoz)2 [S-Phoz is 2-(4,4-dimethyloxazolin-2-yl)thiophenolate] have been synthesized and characterized by X-ray diffraction at 100 K and by spectroscopy (NMR and IR). They show quite different Mo—N and Mo—S distances. The synthesis and structural determination of two isomers of the molybdenum(II) complex (η2-but-2-yne)carbonylbis[2-(4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl)benzenethiolato-κ2N,S]molybdenum(II), [Mo(C11H12NOS)2(C4H6)(CO)] or Mo(CO)(C2Me2)(S-Phoz)2, are presented. The N,N-cis–S,S-trans isomer 1 shows quite different bond lengths to the metal atom [Mo—N = 2.4715 (10) versus 2.3404 (11) Å; Mo—S = 2.4673 (3) versus 2.3665 (3) Å]. In the N,N-trans–S,S-cis isomer 2, which is isotypic with the corresponding W complex, the Mo—N bond lengths [2.236 (2) and 2.203 (2) Å], as well as the Mo—S bond lengths [2.5254 (8) and 2.5297 (8) Å], are almost the same.
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3
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Jurd PM, Li HL, Bhadbhade M, Watson JD, Field LD. Ferralactone formation from iron acetylides and carbon dioxide. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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4
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Bondi R, Ćorović MZ, Buchsteiner M, Vidovič C, Belaj F, Mösch-Zanetti NC. The Effect of Pyridine-2-thiolate Ligands on the Reactivity of Tungsten Complexes toward Oxidation and Acetylene Insertion. Organometallics 2021; 40:3591-3598. [PMID: 34776581 PMCID: PMC8579403 DOI: 10.1021/acs.organomet.1c00472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Indexed: 11/30/2022]
Abstract
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Intending to deepen
our understanding of tungsten acetylene (C2H2) chemistry, with regard to the tungstoenzyme
acetylene hydratase, here we explore the structure and reactivity
of a series of tungsten acetylene complexes, stabilized with pyridine-2-thiolate
ligands featuring tungsten in both +II and +IV oxidation states. By
varying the substitution of the pyridine-2-thiolate moiety with respect
to steric and electronic properties, we examined the details and limits
of the previously reported intramolecular nucleophilic attack on acetylene
followed by the formation of acetylene inserted complexes. Here, we
demonstrate that only the combination of high steric demand and electron-withdrawing
features prevents acetylene insertion. Nevertheless, although variable
synthetic approaches are necessary for their synthesis, tungsten acetylene
complexes can be stabilized predictably with a variety of pyridine-2-thiolate
ligands.
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Affiliation(s)
- Riccardo Bondi
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Miljan Z Ćorović
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Michael Buchsteiner
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Carina Vidovič
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
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5
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Ehweiner MA, Ćorović MZ, Belaj F, Mösch‐Zanetti NC. Synthesis and Reactivity of Molybdenum and Tungsten Alkyne Complexes Containing 6‐Methylpyridine‐2‐thiolate Ligands. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Madeleine A. Ehweiner
- Institute of Chemistry Inorganic Chemistry University of Graz, AT- 8010 Graz Austria
| | - Miljan Z. Ćorović
- Institute of Chemistry Inorganic Chemistry University of Graz, AT- 8010 Graz Austria
| | - Ferdinand Belaj
- Institute of Chemistry Inorganic Chemistry University of Graz, AT- 8010 Graz Austria
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6
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Ehweiner MA, Belaj F, Kirchner K, Mösch-Zanetti NC. Synthesis and Reactivity of a Bioinspired Molybdenum(IV) Acetylene Complex. Organometallics 2021; 40:2576-2583. [PMID: 34393319 PMCID: PMC8356224 DOI: 10.1021/acs.organomet.1c00289] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Indexed: 11/29/2022]
Abstract
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The isolation of
a molybdenum(IV) acetylene (C2H2) complex containing
two bioinspired 6-methylpyridine-2-thiolate
ligands is reported. The synthesis can be performed either by oxidation
of a molybdenum(II) C2H2 complex or by substitution
of a coordinated PMe3 by C2H2 on
a molybdenum(IV) center. Both C2H2 complexes
were characterized by spectroscopic means as well as by single-crystal
X-ray diffraction. Furthermore, the reactivity of the coordinated
C2H2 was investigated with regard to acetylene
hydratase, one of two enzymes that accept C2H2 as a substrate. While the reaction with water resulted in the vinylation
of the pyridine-2-thiolate ligands, an intermolecular nucleophilic
attack on the coordinated C2H2 with the soft
nucleophile PMe3 was observed to give a cationic ethenyl
complex. A comparison with the tungsten analogues revealed less tightly
bound C2H2 in the molybdenum variant, which,
however, shows a higher reactivity toward nucleophiles.
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Affiliation(s)
- Madeleine A Ehweiner
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, 1060 Vienna, Austria
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7
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Ehweiner MA, Peschel LM, Stix N, Ćorović MZ, Belaj F, Mösch-Zanetti NC. Bioinspired Nucleophilic Attack on a Tungsten-Bound Acetylene: Formation of Cationic Carbyne and Alkenyl Complexes. Inorg Chem 2021; 60:8414-8418. [PMID: 33852290 PMCID: PMC8220502 DOI: 10.1021/acs.inorgchem.1c00643] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
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Inspired by the proposed
inner-sphere mechanism of the tungstoenzyme
acetylene hydratase, we have designed tungsten acetylene complexes
and investigated their reactivity. Here, we report the first intermolecular
nucleophilic attack on a tungsten-bound acetylene (C2H2) in bioinspired complexes employing 6-methylpyridine-2-thiolate
ligands. By using PMe3 as a nucleophile, we isolated cationic
carbyne and alkenyl complexes. We report the
first intermolecular nucleophilic attack on
a tungsten-bound C2H2 in two bioinspired complexes
differing only by the oxidation state of the metal center and one
ligand. By using PMe3 as a nucleophile, we isolated cationic
carbyne and alkenyl complexes.
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Affiliation(s)
- Madeleine A Ehweiner
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Lydia M Peschel
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Niklas Stix
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Miljan Z Ćorović
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic Chemistry, University of Graz, 8010 Graz, Austria
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8
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Vidovič C, Belaj F, Mösch‐Zanetti NC. Soft Scorpionate Hydridotris(2-mercapto-1-methylimidazolyl) borate) Tungsten-Oxido and -Sulfido Complexes as Acetylene Hydratase Models. Chemistry 2020; 26:12431-12444. [PMID: 32640122 PMCID: PMC7589279 DOI: 10.1002/chem.202001127] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 06/05/2020] [Indexed: 11/08/2022]
Abstract
A series of WIV alkyne complexes with the sulfur-rich ligand hydridotris(2-mercapto-1-methylimidazolyl) borate) (TmMe ) are presented as bio-inspired models to elucidate the mechanism of the tungstoenzyme acetylene hydratase (AH). The mono- and/or bis-alkyne precursors were reacted with NaTmMe and the resulting complexes [W(CO)(C2 R2 )(TmMe )Br] (R=H 1, Me 2) oxidized to the target [WE(C2 R2 )(TmMe )Br] (E=O, R=H 4, Me 5; E=S, R=H 6, Me 7) using pyridine-N-oxide and methylthiirane. Halide abstraction with TlOTf in MeCN gave the cationic complexes [WE(C2 R2 )(MeCN)(TmMe )](OTf) (E=CO, R=H 10, Me 11; E=O, R=H 12, Me 13; E=S, R=H 14, Me 15). Without MeCN, dinuclear complexes [W2 O(μ-O)(C2 Me2 )2 (TmMe )2 ](OTf)2 (8) and [W2 (μ-S)2 (C2 Me2 )(TmMe )2 ](OTf)2 (9) could be isolated showing distinct differences between the oxido and sulfido system with the latter exhibiting only one molecule of C2 Me2 . This provides evidence that a fine balance of the softness at W is important for acetylene coordination. Upon dissolving complex 8 in acetonitrile complex 13 is reconstituted in contrast to 9. All complexes exhibit the desired stability toward water and the observed effective coordination of the scorpionate ligand avoids decomposition to disulfide, an often-occurring reaction in sulfur ligand chemistry. Hence, the data presented here point toward a mechanism with a direct coordination of acetylene in the active site and provide the basis for further model chemistry for acetylene hydratase.
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Affiliation(s)
- Carina Vidovič
- University of GrazInstitute of ChemistryDepartment of Inorganic ChemistrySchuberstraße 18010GrazAustria
| | - Ferdinand Belaj
- University of GrazInstitute of ChemistryDepartment of Inorganic ChemistrySchuberstraße 18010GrazAustria
| | - Nadia C. Mösch‐Zanetti
- University of GrazInstitute of ChemistryDepartment of Inorganic ChemistrySchuberstraße 18010GrazAustria
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9
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Vidovič C, Peschel LM, Buchsteiner M, Belaj F, Mösch‐Zanetti NC. Structural Mimics of Acetylene Hydratase: Tungsten Complexes Capable of Intramolecular Nucleophilic Attack on Acetylene. Chemistry 2019; 25:14267-14272. [PMID: 31603595 PMCID: PMC6899645 DOI: 10.1002/chem.201903264] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Indexed: 12/22/2022]
Abstract
Bioinspired complexes employing the ligands 6-tert-butylpyridazine-3-thione (SPn) and pyridine-2-thione (SPy) were synthesized and fully characterized to mimic the tungstoenzyme acetylene hydratase (AH). The complexes [W(CO)(C2 H2 )(CHCH-SPy)(SPy)] (4) and [W(CO)(C2 H2 )(CHCH-SPn)(SPn)] (5) were formed by intramolecular nucleophilic attack of the nitrogen donors of the ligand on the coordinated C2 H2 molecule. Labelling experiments using C2 D2 with the SPy system revealed the insertion reaction proceeding via a bis-acetylene intermediate. The starting complex [W(CO)(C2 H2 )(SPy)2 ] (6) for these studies was accessed by the new acetylene precursor mixture [W(CO)(C2 H2 )n (MeCN)3-n Br2 ] (n=1 and 2; 7). All complexes represent rare examples in the field of W-C2 H2 chemistry with 4 and 5 being the first of their kind. In the ongoing debate on the enzymatic mechanism, the findings support activation of acetylene by the tungsten center.
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Affiliation(s)
- Carina Vidovič
- Institute of Chemistry—Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Lydia M. Peschel
- Institute of Chemistry—Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Michael Buchsteiner
- Institute of Chemistry—Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Ferdinand Belaj
- Institute of Chemistry—Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Nadia C. Mösch‐Zanetti
- Institute of Chemistry—Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
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10
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Ehweiner MA, Vidovič C, Belaj F, Mösch-Zanetti NC. Bioinspired Tungsten Complexes Employing a Thioether Scorpionate Ligand. Inorg Chem 2019; 58:8179-8187. [PMID: 31141348 DOI: 10.1021/acs.inorgchem.9b00973] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The synthesis and characterization of a series of novel tungsten complexes employing the bioinspired, sulfur-rich scorpionate ligand [PhTt] (phenyltris((methylthio)methyl)borate) are reported. Starting from the previously published tungsten precursor [WBr2(CO)3(NCMe)2], a salt metathesis reaction with 1 equiv of Cs[PhTt] led to the desired complex [WBr(CO)3(PhTt)] (1), making it the first tungsten complex employing a poly(thioether)borate ligand. Surprisingly, the reaction of [WBr2(CO)3(NCMe)2] with an excess of the ligand gave complex [W(CO)2(η2-CH2SMe)(PhTt)] (2) with a bidentate (methylthio)methanide ligand as the major product. Thereby, phenyldi((methylthio)methyl)borane is formed, which was isolated and characterized by NMR spectroscopy. The bromido ligand in [WBr(CO)3(PhTt)] was further substituted by the S,N-bidentate methimazole in order to make the first coordination sphere more sulfur-rich forming [W(CO)2(mt)(PhTt)] (3). Alkyne tungsten complexes employing the sulfur-rich scorpionate ligand were accessible by reaction of [WBr2(CO)(C2R2)2(NCMe)] (R = Me, Ph) with Cs[PhTt] forming [WBr(CO)(C2R2)2(PhTt- S, S')] (R = Me 4, Ph 5), with the potentially tridentate ligand coordinated only via two sulfur atoms. In the case of 4, the higher flexibility of the bidentate coordination leads to the formation of two isomers with respect to the six-membered ring formed by the tungsten center and the two coordinated sulfur atoms of the ligand. All complexes 1-5 were characterized by single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Madeleine A Ehweiner
- Institute of Chemistry, Inorganic Chemistry , University of Graz , Schubertstrasse 1 , 8010 Graz , Austria
| | - Carina Vidovič
- Institute of Chemistry, Inorganic Chemistry , University of Graz , Schubertstrasse 1 , 8010 Graz , Austria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic Chemistry , University of Graz , Schubertstrasse 1 , 8010 Graz , Austria
| | - Nadia C Mösch-Zanetti
- Institute of Chemistry, Inorganic Chemistry , University of Graz , Schubertstrasse 1 , 8010 Graz , Austria
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11
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Peschel LM, Vidovič C, Belaj F, Neshchadin D, Mösch‐Zanetti NC. Activation and Photoinduced Release of Alkynes on a Biomimetic Tungsten Center: The Photochemical Behavior of the W-S-Phoz System. Chemistry 2019; 25:3893-3902. [PMID: 30773712 PMCID: PMC6563718 DOI: 10.1002/chem.201805665] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/13/2018] [Indexed: 01/09/2023]
Abstract
The synthesis and structural determination of four tungsten alkyne complexes coordinated by the bio-inspired S,N-donor ligand 2-(4',4'-dimethyloxazoline-2'-yl)thiophenolate (S-Phoz) is presented. A previously established protocol that involved the reaction of the respective alkyne with the bis-carbonyl precursor [W(CO)2 (S-Phoz)2 ] was used for the complexes [W(CO)(C2 R2 )(S-Phoz)2 ] (R=H, 1 a; Me, 1 b; Ph, 1 c). Oxidation with pyridine-N-oxide gave the corresponding W-oxo species [WO(C2 R2 )(S-Phoz)2 ] (R=H, 2 a; Me, 2 b; Ph, 2 c). All W-oxo-alkyne complexes (2 a, b, c) were found to be capable of alkyne release upon light irradiation to afford five-coordinate [WO(S-Phoz)2 ] (3). The photoinduced release of the alkyne ligand was studied in detail by in situ 1 H NMR measurements, which revealed correlation of the photodissociation rate constant (2 b>2 a>2 c) with the elongation of the alkyne C≡C bond in the molecular structures. Oxidation of [WO(S-Phoz)2 ] (3) with pyridine-N-oxide yielded [WO2 (S-Phoz)2 ] (4), which shows highly fluxional behavior in solution. Variable-temperature 1 H NMR spectroscopy revealed three isomeric forms with respect to the ligand arrangement versus each other. Furthermore, compound 4 rearranges to tetranuclear oxo compound [W4 O4 (μ-O)6 (S-Phoz)4 ] (5) and dinuclear [{WO(μ-O)(S-Phoz)}2 ] (6) over time. The latter two were identified by single-crystal X-ray diffraction analyses.
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Affiliation(s)
- Lydia M. Peschel
- Institute of ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Carina Vidovič
- Institute of ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Ferdinand Belaj
- Institute of ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Dmytro Neshchadin
- Institute of Physical and Theoretical ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
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12
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13
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Schreyer M, Hintermann L. Is the tungsten(IV) complex (NEt 4) 2[WO(mnt) 2] a functional analogue of acetylene hydratase? Beilstein J Org Chem 2017; 13:2332-2339. [PMID: 29181113 PMCID: PMC5687055 DOI: 10.3762/bjoc.13.230] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 10/04/2017] [Indexed: 11/23/2022] Open
Abstract
The tungsten(IV) complex (Et4N)2[W(O)(mnt)2] (1; mnt = maleonitriledithiolate) was proposed (Sarkar et al., J. Am. Chem. Soc.1997, 119, 4315) to be a functional analogue of the active center of the enzyme acetylene hydratase from Pelobacter acetylenicus, which hydrates acetylene (ethyne; 2) to acetaldehyde (ethanal; 3). In the absence of a satisfactory mechanistic proposal for the hydration reaction, we considered the possibility of a metal–vinylidene type activation mode, as it is well established for ruthenium-based alkyne hydration catalysts with anti-Markovnikov regioselectivity. To validate the hypothesis, the regioselectivity of tungsten-catalyzed alkyne hydration of a terminal, higher alkyne had to be determined. However, complex 1 was not a competent catalyst for the hydration of 1-octyne under the conditions tested. Furthermore, we could not observe the earlier reported hydration activity of complex 1 towards acetylene. A critical assessment of, and a possible explanation for the earlier reported results are offered. The title question is answered with "no".
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Affiliation(s)
- Matthias Schreyer
- Department Chemie, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.,TUM Catalysis Research Center, Ernst-Otto-Fischer-Str. 1, 85748 Garching bei München, Germany
| | - Lukas Hintermann
- Department Chemie, Technische Universität München, Lichtenbergstr. 4, 85748 Garching bei München, Germany.,TUM Catalysis Research Center, Ernst-Otto-Fischer-Str. 1, 85748 Garching bei München, Germany
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14
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Peschel LM, Belaj F, Schachner JA, Mösch-Zanetti NC. Dinuclear MoV
Complexes with Thiophenolate-oxazoline Ligands: Synthesis, Characterization, and Exceptional Activity in Catalytic Olefin Epoxidation. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700159] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lydia M. Peschel
- Institute of Chemistry; University of Graz; Schubertstrasse 1 8010 Graz Austria
| | - Ferdinand Belaj
- Institute of Chemistry; University of Graz; Schubertstrasse 1 8010 Graz Austria
| | - Jörg A. Schachner
- Institute of Chemistry; University of Graz; Schubertstrasse 1 8010 Graz Austria
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15
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Rodygin KS, Werner G, Kucherov FA, Ananikov VP. Calcium Carbide: A Unique Reagent for Organic Synthesis and Nanotechnology. Chem Asian J 2016; 11:965-76. [PMID: 26898248 DOI: 10.1002/asia.201501323] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Indexed: 11/09/2022]
Abstract
Acetylene, HC≡CH, is one of the primary building blocks in synthetic organic and industrial chemistry. Several highly valuable processes have been developed based on this simplest alkyne and the development of acetylene chemistry has had a paramount impact on chemical science over the last few decades. However, in spite of numerous useful possible reactions, the application of gaseous acetylene in everyday research practice is rather limited. Moreover, the practical implementation of high-pressure acetylene chemistry can be very challenging, owing to the risk of explosion and the requirement for complex equipment; special safety precautions need to be taken to store and handle acetylene under high pressure, which limit its routine use in a standard laboratory setup. Amazingly, recent studies have revealed that calcium carbide, CaC2 , can be used as an easy-to-handle and efficient source of acetylene for in situ chemical transformations. Thus, calcium carbide is a stable and inexpensive acetylene precursor that is available on the ton scale and it can be handled with standard laboratory equipment. The application of calcium carbide in organic synthesis will bring a new dimension to the powerful acetylene chemistry.
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Affiliation(s)
- Konstantin S Rodygin
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Stary Petergof, 198504, Russia
| | - Georg Werner
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Stary Petergof, 198504, Russia
| | - Fedor A Kucherov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow, 119991, Russia
| | - Valentine P Ananikov
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Stary Petergof, 198504, Russia. .,Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow, 119991, Russia.
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16
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Liu J, Wu D, Su X, Han M, Kimura SY, Gray DL, Shapley JR, Abu-Omar MM, Werth CJ, Strathmann TJ. Configuration Control in the Synthesis of Homo- and Heteroleptic Bis(oxazolinylphenolato/thiazolinylphenolato) Chelate Ligand Complexes of Oxorhenium(V): Isomer Effect on Ancillary Ligand Exchange Dynamics and Implications for Perchlorate Reduction Catalysis. Inorg Chem 2016; 55:2597-611. [DOI: 10.1021/acs.inorgchem.5b02940] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jinyong Liu
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Dimao Wu
- Department
of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Xiaoge Su
- Pure Storage Inc., Mountain View, California 94041, United States
| | | | | | | | | | - Mahdi M. Abu-Omar
- Department of Chemistry and School of Chemical
Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Charles J. Werth
- Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Timothy J. Strathmann
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
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