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Dolati H, Denker L, Martínez JP, Trzaskowski B, Frank R. Iminoboranes With Parent B=NH Entity: Imino Group Metathesis, Nucleophilic Reactivity and N-N Coupling. Chemistry 2023; 29:e202302494. [PMID: 37584302 DOI: 10.1002/chem.202302494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/11/2023] [Accepted: 08/11/2023] [Indexed: 08/17/2023]
Abstract
While R2 C=N-R double bonds in organic imines are well established, the related iminoboranes R-B=N-R are either prone to oligomerization or can only be stabilized at sufficient steric congestion. In particular, the examples of unsubstituted parent B=N-H entity are rare. We demonstrate that the amino imidazoline-2-imine ligand system (HAmIm) not only gives rise to the isolation of a parent (AmIm)B=N-H iminoborane, but also to species of type (AmIm)B=N-SiMe3 with concomitant stabilization by lithium bromide. The double bond character in these systems is unambiguously corroborated by DFT calculations. The steric accessibility of the (AmIm)B=NH unit allows facile reactivity including metathesis reactions with C=O and C=S bonds, nucleophilic addition toward organic and organometallic carbonyl compounds, but also oxidative N-N coupling within a dimeric unit. Thus, the chemical behavior of the (AmIm)B=N-H and (AmIm)B=N-SiMe3 is distinctly different from that of organic imines.
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Affiliation(s)
- Hadi Dolati
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| | - Lars Denker
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| | - Juan Pablo Martínez
- Centre of New Technologies, University of Warsaw, Banacha 2 C, 02-097, Warszawa, Poland
| | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, Banacha 2 C, 02-097, Warszawa, Poland
| | - René Frank
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
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Ponduru TT, Wang G, Manoj S, Pan S, Zhao L, Frenking G, Dias HVR. Synthesis and characterization of heterometallic complexes involving coinage metals and isoelectronic Fe(CO) 5, [Mn(CO) 5] - and [Fe(CO) 4CN] - ligands. Dalton Trans 2020; 49:8566-8581. [PMID: 32542268 DOI: 10.1039/d0dt01590c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chemistry of coinage metal ions with Fe(CO)5, [Mn(CO)5]- and [Fe(CO)4CN]- has been explored using Mes3P and N-heterocyclic carbene supporting ligands. A comparison of [(SIPr)Au-Fe(CO)5][SbF6], [(Et2CAAC)Au-Fe(CO)5][SbF6] and [(Mes3P)Au-Fe(CO)5][SbF6] shows that the ligand donor strength towards Au(i) follows the order Mes3P > Et2CAAC > SIPr. These Fe(CO)5 complexes show significant blue shifts in [small nu, Greek, macron]CO bands relative to those observed for free Fe(CO)5 as a result of it serving as a net electron donor to Au(i). Au(i) is a much stronger acceptor in (SIPr)Au-Mn(CO)5 compared to Ag(i) in (SIPr)Ag-Mn(CO)5. The structural details of Mes3PAu-Mn(CO)5 are also presented. [Fe(CO)4CN]- afforded CN bridged coinage metal complexes with (IPr*)Au+, (SIPr)Ag+ and (SIPr)Cu+ moieties, rather than molecules with direct Fe/coinage metal bonds. The computed total interaction energies indicate that both [Mn(CO)5]- and [Fe(CO)4CN]- are stronger donors toward Au(i) than Fe(CO)5. A detailed analysis of the bonding interactions between the coinage metal ions and Fe(CO)5, [Mn(CO)5]- and [Fe(CO)4CN]- suggests that the largest contribution comes from electrostatic attraction, while the covalent component follows the Dewar-Chatt-Duncanson model. The σ-donor interactions of these organometallic ligands with coinage metal ions are considerably stronger than the π-backbonding from the coinage metal ions.
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Affiliation(s)
- Tharun Teja Ponduru
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
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Dickie CM, Nippe M. Magnetization dynamics of a heterometallic Dy-isocarbonyl complex. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00224a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Slow magnetic relaxation is observed for the first structurally characterized Dy-isocarbonyl complex.
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Affiliation(s)
| | - Michael Nippe
- Department of Chemistry
- Texas A&M University
- College Station
- USA
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4
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Synthesis and characterization of one- and two-dimensional octacyanometalate(V) networks: {[trans-MII(DMF)4][cis-MII(DMF)4]2[MV(CN)8]2}n (MII=Mn, Fe, Ni; MV=Mo, W). Polyhedron 2007. [DOI: 10.1016/j.poly.2007.01.049] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Withers JR, Ruschman C, Parkin S, Holmes SM. One- and three-dimensional octacyanometalate(IV) networks constructed via a building block approach: {[trans-NiII(tn)2(OH2)][trans-NiII(μ-NC)2(tn)2][(μ-NC)3MIV(CN)5]·6H2O} (MIV=Mo, W) and Cs4[CuII(OH2)4]2[CuII(NH3)]4[MoIV(CN)8]4·2H2O. Polyhedron 2005. [DOI: 10.1016/j.poly.2005.06.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Podgajny R, Desplanches C, Sieklucka B, Sessoli R, Villar V, Paulsen C, Wernsdorfer W, Dromzée Y, Verdaguer M. Pentanuclear octacyanotungstate(V)-based molecule with a high spin ground state S= (13/2). Inorg Chem 2002; 41:1323-7. [PMID: 11874372 DOI: 10.1021/ic010679n] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert Podgajny
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
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Sellmann D, Geipel F, Heinemann FW. (NEt(4))(2)[Fe(CN)(2)(CO)('S(3)')]: an iron thiolate complex modeling the [Fe(CN)(2)(CO)(S-Cys)(2)] site of [NiFe] hydrogenase centers. Chemistry 2002; 8:958-66. [PMID: 11857710 DOI: 10.1002/1521-3765(20020215)8:4<958::aid-chem958>3.0.co;2-i] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In the search for complexes modeling the [Fe(CN)(2)(CO)(cysteinate)(2)] cores of the active centers of [NiFe] hydrogenases, the complex (NEt(4))(2)[Fe(CN)(2)(CO)('S(3)')] (4) was found ('S(3)'(2-)=bis(2-mercaptophenyl)sulfide(2-)). Starting complex for the synthesis of 4 was [Fe(CO)(2)('S(3)')](2) (1). Complex 1 formed from [Fe(CO)(3)(PhCH=CHCOMe)] and neutral 'S(3)'-H(2). Reactions of 1 with PCy(3) or DPPE (1,2-bis(diphenylphosphino)ethane) yielded diastereoselectively [Fe(CO)(2)(PCy(3))('S(3)')] (2) and [Fe(CO)(dppe)('S(3)')] (3). The diastereoselective formation of 2 and 3 is rationalized by the trans influence of the 'S(3)'(2-) thiolate and thioether S atoms which act as pi donors and pi acceptors, respectively. The trans influence of the 'S(3)'(2-) sulfur donors also rationalizes the diastereoselective formation of the C(1) symmetrical anion of 4, when 1 is treated with four equivalents of NEt(4)CN. The molecular structures of 1, 3 x 0.5 C(7)H(8), and (AsPh(4))(2)[Fe(CN)(2)(CO)('S(3)')] x acetone (4 a x C(3)H(6)O) were determined by X-ray structure analyses. Complex 4 is the first complex that models the unusual 2:1 cyano/carbonyl and dithiolate coordination of the [NiFe] hydrogenase iron site. Complex 4 can be reversibly oxidized electrochemically; chemical oxidation of 4 by [Fe(Cp)(2)PF(6)], however, led to loss of the CO ligand and yielded only products, which could not be characterized. When dissolved in solvents of increasing proton activity (from CH(3)CN to buffered H(2)O), complex 4 exhibits drastic nu(CO) blue shifts of up to 44 cm(-1), and relatively small nu(CN) red shifts of approximately 10 cm(-1). The nu(CO) frequency of 4 in H(2)O (1973 cm(-1)) is higher than that of any hydrogenase state (1952 cm(-1)). In addition, the nu(CO) frequency shift of 4 in various solvents is larger than that of [NiFe] hydrogenase in its most reduced or oxidized state. These results demonstrate that complexes modeling properly the nu(CO) frequencies of [NiFe] hydrogenase probably need a [Ni(thiolate)(2)] unit. The results also demonstrate that the nu(CO) frequency of [Fe(CN)(2)(CO)(thiolate)(2)] complexes is more significantly shifted by changing the solvent than the nu(CO) frequency of [NiFe] hydrogenases by coupled-proton and electron-transfer reactions. The "iron-wheel" complex [Fe(6)[Fe('S(3)')(2)](6)] (6) resulting as a minor by-product from the recrystallization of 2 in boiling toluene could be characterized by X-ray structure analysis.
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Affiliation(s)
- Dieter Sellmann
- Institut für Anorganische Chemie der Universität Erlangen-Nürnberg Egerlandstrasse 1, 91058 Erlangen, Germany.
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Darensbourg MY, Lyon EJ, Smee JJ. The bio-organometallic chemistry of active site iron in hydrogenases. Coord Chem Rev 2000. [DOI: 10.1016/s0010-8545(00)00268-x] [Citation(s) in RCA: 246] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lai CH, Lee WZ, Miller ML, Reibenspies JH, Darensbourg DJ, Darensbourg MY. Responses of the Fe(CN)2(CO) Unit to Electronic Changes as Related to Its Role in [NiFe]Hydrogenase. J Am Chem Soc 1998. [DOI: 10.1021/ja982053a] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chia-Huei Lai
- Contribution from the Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
| | - Way-Zen Lee
- Contribution from the Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
| | - Matthew L. Miller
- Contribution from the Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
| | - Joseph H. Reibenspies
- Contribution from the Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
| | - Donald J. Darensbourg
- Contribution from the Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
| | - Marcetta Y. Darensbourg
- Contribution from the Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
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Darensbourg DJ, Reibenspies JH, Lai CH, Lee WZ, Darensbourg MY. Analysis of an Organometallic Iron Site Model for the Heterodimetallic Unit of [NiFe]Hydrogenase. J Am Chem Soc 1997. [DOI: 10.1021/ja971559a] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Chia-Huei Lai
- Department of Chemistry, Texas A&M University College Station, Texas 77843
| | - Way-Zen Lee
- Department of Chemistry, Texas A&M University College Station, Texas 77843
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Nielsen K, Schenk WA, Kriegmeier M, Sukhorukov VL, Zimmermann U. Absorption of Tungsten Carbonyl Anions into the Lipid Bilayer Membrane of Mouse Myeloma Cells. Inorg Chem 1996. [DOI: 10.1021/ic960641o] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Katja Nielsen
- Institut für Anorganische Chemie and Institut für Biotechnologie, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Wolfdieter A. Schenk
- Institut für Anorganische Chemie and Institut für Biotechnologie, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Michael Kriegmeier
- Institut für Anorganische Chemie and Institut für Biotechnologie, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Vladimir L. Sukhorukov
- Institut für Anorganische Chemie and Institut für Biotechnologie, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ulrich Zimmermann
- Institut für Anorganische Chemie and Institut für Biotechnologie, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Darensbourg DJ, Yoder JC, Holtcamp MW, Kevin K. Klausmeyer, and, Reibenspies JH. Cyanide-Bridged Heterobimetallic Complexes of the Group 6 Metal Carbonyls and Copper(I). X-ray Structures of (CO)5MCNCu(PPh3)3 (M = Cr, W) Derivatives. Inorg Chem 1996. [DOI: 10.1021/ic9510627] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jeffrey C. Yoder
- Department of Chemistry, Texas A&M University, College Station, Texas 77843
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Powell J, Nyburg SC, Smith SJ. Stereochemical studies of a multifunctional P-donor ligand capable of selective lithium ion binding for CO activation via ‘tripodal O3N unit’. Inorganica Chim Acta 1983. [DOI: 10.1016/s0020-1693(00)81462-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Models for the adsorption and reactions of metal carbonyl compounds on alumina surfaces. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/0304-5102(81)80018-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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