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Inglis CM, Manzano RA, Kirk RM, Sharma M, Stewart MD, Watson LJ, Hill AF. Poly(imidazolyliden-yl)borato Complexes of Tungsten: Mapping Steric vs. Electronic Features of Facially Coordinating Ligands. Molecules 2023; 28:7761. [PMID: 38067496 PMCID: PMC10798377 DOI: 10.3390/molecules28237761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 11/21/2023] [Accepted: 11/21/2023] [Indexed: 01/22/2024] Open
Abstract
A convenient synthesis of [HB(HImMe)3](PF6)2 (ImMe = N-methylimidazolyl) is decribed. This salt serves in situ as a precursor to the tris(imidazolylidenyl)borate Li[HB(ImMe)3] pro-ligand upon deprotonation with nBuLi. Reaction with [W(≡CC6H4Me-4)(CO)2(pic)2(Br)] (pic = 4-picoline) affords the carbyne complex [W(≡CC6H4Me-4)(CO)2{HB(ImMe)3}]. Interrogation of experimental and computational data for this compound allow a ranking of familiar tripodal and facially coordinating ligands according to steric (percentage buried volume) and electronic (νCO) properties. The reaction of [W(≡CC6H4Me-4)(CO)2{HB(ImMe)3}] with [AuCl(SMe2)] affords the heterobimetallic semi-bridging carbyne complex [WAu(μ-CC6H4Me-4)(CO)2(Cl){HB(ImMe)3}].
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Affiliation(s)
| | | | | | | | | | | | - Anthony F. Hill
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
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2
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Timmermann C, Thiem P, Wanitschke D, Hüttenschmidt M, Romischke J, Villinger A, Seidel WW. Migratory insertion of isocyanide into a ketenyl-tungsten bond as key step in cyclization reactions. Chem Sci 2021; 13:123-132. [PMID: 35059160 PMCID: PMC8694283 DOI: 10.1039/d1sc06149f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 11/21/2021] [Indexed: 12/28/2022] Open
Abstract
Treatment of the side-on tungsten alkyne complex of ethinylethyl ether [Tp*W(CO)2(η2-C,C'-HCCOCH2CH3)]+ {Tp* = hydridotris(3,4,5-trimethylpyrazolyl)borate} (2a) with n-Bu4NI afforded the end-on ketenyl complex [Tp*W(CO)2(κ1-HCCO)] (4a). This formal 16 ve complex bearing the prototype of a ketenyl ligand is surprisingly stable and converts only under activation by UV light or heat to form a dinuclear complex [Tp*2W2(CO)4(μ-CCH2)] (6). The ketenyl ligand in complex 4a underwent a metal template controlled cyclization reaction upon addition of isocyanides. The oxametallacycles [Tp*W(CO)2{κ2-C,O-C(NHXy)C(H)C(Nu)O}] {Nu = OMe (7), OEt (8), N(i-Pr)2 (9), OH (10), O1/2 (11)} were formed by coordination of Xy-NC (Xy = 2,6-dimethylphenyl) at 4a and subsequent migratory insertion (MI) into the W-ketenyl bond. The resulting intermediate is susceptible to addition reactions with protic nucleophiles. Compounds 2a-PF6, 4a/b, and 7-11 were fully characterized including XRD analysis. The cyclization mechanism has been confirmed both experimentally and by DFT calculations. In cyclic voltammetry, complexes 7-9 are characterized by a reversible W(ii)/W(iii) redox process. The dinuclear complex 11 however shows two separated redox events. Based on cyclic voltammetry measurements with different conducting electrolytes and IR spectroelectrochemical (SEC) measurements the W(ii)/W(iii) mixed valent complex 11+ is assigned to class II in terms of the Robin-Day classification.
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Affiliation(s)
- Christopher Timmermann
- Institut für Chemie, Universität Rostock Albert-Einstein-Straße 3a D-18059 Rostock Germany
| | - Paula Thiem
- Institut für Chemie, Universität Rostock Albert-Einstein-Straße 3a D-18059 Rostock Germany
| | - Dominik Wanitschke
- Institut für Chemie, Universität Rostock Albert-Einstein-Straße 3a D-18059 Rostock Germany
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a D-18059 Rostock Germany
| | - Mareike Hüttenschmidt
- Institut für Chemie, Universität Rostock Albert-Einstein-Straße 3a D-18059 Rostock Germany
| | - Johanna Romischke
- Institut für Chemie, Universität Rostock Albert-Einstein-Straße 3a D-18059 Rostock Germany
| | - Alexander Villinger
- Institut für Chemie, Universität Rostock Albert-Einstein-Straße 3a D-18059 Rostock Germany
| | - Wolfram W Seidel
- Institut für Chemie, Universität Rostock Albert-Einstein-Straße 3a D-18059 Rostock Germany
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a D-18059 Rostock Germany
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3
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Muraoka T, Tsuchimoto M, Ueno K. Synthesis, structure, and reactivity of a pyridine-stabilized silanonetungsten complex. Dalton Trans 2020; 49:5100-5107. [PMID: 32211671 DOI: 10.1039/d0dt00497a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A pyridine-stabilized silanonetungsten complex Cp*(OC)2W{O[double bond, length as m-dash]SiMes2(py)}(SiMe3) (1b, Cp* = η5-C5Me5, Mes = 2,4,6-Me3C6H2, py = C5H5N) was obtained by the reaction of a silyl(silylene) complex Cp*(OC)2W([double bond, length as m-dash]SiMes2)(SiMe3) (3) with pyridine-N-oxide in pyridine. X-ray crystal structure determination revealed that complex 1b shows a similar geometry to that observed for a previously synthesized DMAP-stabilized analogue, Cp*(OC)2W{O[double bond, length as m-dash]SiMes2(DMAP)}(SiMe3) (1a, DMAP = 4-NMe2C6H4N). The Si[double bond, length as m-dash]O and W-O bond distances in 1b are comparable to those observed in 1a, but the nitrogen to silicon coordination bond of 1b is slightly longer (ca. 0.05 Å) than that of 1a, indicating the weaker coordination of pyridine than that of DMAP. The reaction of 1b with excess PMe3 in C6D6 at r. t. proceeded via elimination of pyridine to afford a five-membered metallacyclic carbene complex, Cp*(OC)W([double bond, length as m-dash]C(SiMe3)OSiMes2O)(PMe3) (5), but that of 1a with PMe3 did not proceed at all. Complex 5 was further transformed in C7D8 at 100 °C for 4 h to give a four-membered W-O-Si-O metallacyclic complex with carbyne and PMe3 ligands, Cp*W(OSiMes2O)([triple bond, length as m-dash]CSiMe3)(PMe3) (7). The structural features of complexes 1b, 5, and 7 are comparable to those suggested theoretically as intermediates in the reaction of 3 with a sulfuration reagent to afford a six-membered metallacyclic carbene complex, Cp*W(S){[double bond, length as m-dash]C(SiMe3)C([double bond, length as m-dash]O)OSiMes2S} (6), indicating that complex 1b and the theoretically proposed silanethione complex are transformed via a similar reaction pathway.
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Affiliation(s)
- Takako Muraoka
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
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4
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Ossinger S, Kipgen L, Naggert H, Bernien M, Britton AJ, Nickel F, Arruda LM, Kumberg I, Engesser TA, Golias E, Näther C, Tuczek F, Kuch W. Effect of ligand methylation on the spin-switching properties of surface-supported spin-crossover molecules. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:114003. [PMID: 31778990 DOI: 10.1088/1361-648x/ab5c92] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
X-ray absorption spectroscopy investigations of the spin-state switching of spin-crossover (SCO) complexes adsorbed on a highly-oriented pyrolytic graphite (HOPG) surface have shown so far that HOPG is a promising candidate to realize applications such as spintronic devices because of the stability of SCO complexes on HOPG and the possibility of highly efficient thermal and light-induced spin-state switching. Herein, we present the spin switching of several Fe(II) SCO complexes adsorbed on an HOPG surface with particular emphasis on the thermally induced spin transition behaviour with respect to different structural modifications. The complexes of the type [Fe(bpz)2(L)] (bpz = dihydrobis(pyrazolyl)borate, L = 1,10-phenanthroline, 2,2'-bipyridine) and their methylated derivatives exhibit SCO in the solid state with some differences regarding cooperative effects. However, in the vacuum-deposited thick films on quartz, complete and more gradual spin transition behavior is observable via UV/vis spectroscopy. In contrast to that, all complexes show large differences upon direct contact with HOPG. Whereas the unmodified complexes show thermal and light-induced SCO, the addition of e.g. two or four methyl groups leads to a partial or a complete loss of the SCO on the surface. The angle-dependent measurement of the N K-edge compared to calculations indicates that the complete SCO and HS-locked molecules on the surface exhibit a similar preferential orientation, whereas complexes undergoing an incomplete SCO exhibit a random orientation on the surface. These results are discussed in the light of molecule-substrate interactions.
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Affiliation(s)
- Sascha Ossinger
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118 Kiel, Germany
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5
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Abernethy RJ, Foreman MRSJ, Hill AF, Smith MK, Willis AC. Relative hemilabilities of H2B(az)2 (az = pyrazolyl, dimethylpyrazolyl, methimazolyl) chelates in the complexes [M(η-C3H5)(CO)2{H2B(az)2}] (M = Mo, W). Dalton Trans 2020; 49:781-796. [DOI: 10.1039/c9dt03744f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The question of B–H–Mo hemilability in a range of dihydrobis(azolyl)borate scorpionate ligands is discussed with reference to η3-allyl complexes [Mo(η3-C3H5)(CO)2{H2B(az)2}] [az = pyrazolyl (pz), dimethylpyrazolyl (pz*), mercaptoimidazolyl (mt)].
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Affiliation(s)
- Robyn J. Abernethy
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Mark R. St.-J. Foreman
- Nuclear Chemistry and Industrial Materials Recycling
- Chalmers University of Technology
- Göteborg
- Sweden
| | - Anthony F. Hill
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Matthew K. Smith
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Anthony C. Willis
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
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6
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Mörtel M, Lindner T, Scheurer A, Heinemann FW, Khusniyarov MM. Phenanthroline-Based Molecular Switches for Prospective Chemical Grafting: A Synthetic Strategy and Its Application to Spin-Crossover Complexes. Inorg Chem 2019; 59:2659-2666. [PMID: 31509384 DOI: 10.1021/acs.inorgchem.9b01424] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Max Mörtel
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Thomas Lindner
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Andreas Scheurer
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
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7
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8
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Mörtel M, Witt A, Heinemann FW, Bochmann S, Bachmann J, Khusniyarov MM. Synthesis, Characterization, and Properties of Iron(II) Spin-Crossover Molecular Photoswitches Functioning at Room Temperature. Inorg Chem 2017; 56:13174-13186. [DOI: 10.1021/acs.inorgchem.7b01952] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Max Mörtel
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Alexander Witt
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Sebastian Bochmann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Julien Bachmann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
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9
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Zhang Y, Lu D, Zhang JJ, Wu C. Synthesis and characterization of imidazolium poly(azolyl)borate ionic liquids and their potential application in SO2 absorption. RSC Adv 2016. [DOI: 10.1039/c6ra10356a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New imidazolium poly(azolyl)borate ionic liquids (ILs) were synthesized by salt metathesis, and they can absorb SO2 through multi-site interactions at 20 °C, 0.1 MPa SO2 with the highest SO2 capacity of 5.8 mol mol−1 of IL and 1.05 g g−1 of IL.
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Affiliation(s)
- Y. Zhang
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
| | - D. Lu
- Department of Applied Chemistry
- School of Science
- Xi'an Jiaotong University
- Xi'an
- China
| | - J.-J. Zhang
- Department of Applied Chemistry
- School of Science
- Xi'an Jiaotong University
- Xi'an
- China
| | - C. Wu
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
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10
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Affiliation(s)
- Anthony F. Hill
- Research School of Chemistry, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Jas S. Ward
- Research School of Chemistry, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Yaoyao Xiong
- Research School of Chemistry, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
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11
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Milek M, Heinemann FW, Khusniyarov MM. Spin Crossover Meets Diarylethenes: Efficient Photoswitching of Magnetic Properties in Solution at Room Temperature. Inorg Chem 2013; 52:11585-92. [DOI: 10.1021/ic401960x] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Magdalena Milek
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen−Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen−Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen−Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
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12
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Cordiner RL, Hill AF, Wagler J. Reactions of [Mo(≡CBr)(CO)2{HB(pzMe2)3}] (pz = pyrazol-1-yl) with Amines: Synthesis of Amino, Pyridinium, and Thiolato Carbyne Complexes. Organometallics 2008. [DOI: 10.1021/om8004756] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Richard L. Cordiner
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia, and Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, Freiberg, Germany
| | - Anthony F. Hill
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia, and Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, Freiberg, Germany
| | - Jörg Wagler
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia, and Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, Freiberg, Germany
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13
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Caldwell LM. Alkylidyne Complexes Ligated by Poly(pyrazolyl)borates. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2008. [DOI: 10.1016/s0065-3055(07)56001-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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14
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2004. Coord Chem Rev 2006. [DOI: 10.1016/j.ccr.2005.10.020] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Abernethy RJ, Anthony F.Hill, Neumann H, Willis AC. Poly(azolyl) chelate chemistry 14.[1] κ2-S,S′ vs κ3-H,S,S′- H2B(mt)2 (mt=methimazolyl)borate coordination in the complex [W(CO){H2B(mt)2}2]. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2004.07.061] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Anderson S, Cook DJ, Hill AF, Malget JM, White AJP, Williams DJ. Reactions of Tungsten Alkylidynes with Thionyl Chloride. Organometallics 2004. [DOI: 10.1021/om030691i] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephen Anderson
- Department of Chemistry, Imperial College, South Kensington, London, U.K., and Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, A.C.T., Australia
| | - Darren J. Cook
- Department of Chemistry, Imperial College, South Kensington, London, U.K., and Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, A.C.T., Australia
| | - Anthony F. Hill
- Department of Chemistry, Imperial College, South Kensington, London, U.K., and Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, A.C.T., Australia
| | - John M. Malget
- Department of Chemistry, Imperial College, South Kensington, London, U.K., and Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, A.C.T., Australia
| | - Andrew J. P. White
- Department of Chemistry, Imperial College, South Kensington, London, U.K., and Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, A.C.T., Australia
| | - David J. Williams
- Department of Chemistry, Imperial College, South Kensington, London, U.K., and Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, A.C.T., Australia
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