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Pérez‐Bitrián A, Hoffmann KF, Krause KB, Thiele G, Limberg C, Riedel S. Unravelling the Role of the Pentafluoroorthotellurate Group as a Ligand in Nickel Chemistry. Chemistry 2022; 28:e202202016. [PMID: 35851723 PMCID: PMC9825845 DOI: 10.1002/chem.202202016] [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: 06/29/2022] [Indexed: 01/11/2023]
Abstract
The pentafluoroorthotellurate group (teflate, OTeF5 ) is able to form species, for which only the fluoride analogues are known. Despite nickel fluorides being widely investigated, nickel teflates have remained elusive for decades. By reaction of [NiCl4 ]2- and neat ClOTeF5 , we have synthesized the homoleptic [Ni(OTeF5 )4 ]2- anion, which presents a distorted tetrahedral structure, unlike the polymeric [NiF4 ]2- . This high-spin complex has allowed the study of the electronic properties of the teflate group, which can be classified as a weak/medium-field ligand, and therefore behaves as the fluoride analogue also in ligand-field terms. The teflate ligands in [NEt4 ]2 [Ni(OTeF5 )4 ] are easily substituted, as shown by the formation of [Ni(NCMe)6 ][OTeF5 ]2 by dissolving it in acetonitrile. Nevertheless, careful reactions with other conventional ligands have enabled the crystallization of nickel teflate complexes with different coordination geometries, i.e. [NEt4 ]2 [trans-Ni(OEt2 )2 (OTeF5 )4 ] or [NEt4 ][Ni(bpyMe2 )(OTeF5 )3 ].
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Affiliation(s)
- Alberto Pérez‐Bitrián
- Fachbereich Biologie, Chemie, PharmazieInstitut für Chemie und Biochemie – Anorganische ChemieFreie Universität BerlinFabeckstraße 34/3614195BerlinGermany
| | - Kurt F. Hoffmann
- Fachbereich Biologie, Chemie, PharmazieInstitut für Chemie und Biochemie – Anorganische ChemieFreie Universität BerlinFabeckstraße 34/3614195BerlinGermany
| | - Konstantin B. Krause
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Günther Thiele
- Fachbereich Biologie, Chemie, PharmazieInstitut für Chemie und Biochemie – Anorganische ChemieFreie Universität BerlinFabeckstraße 34/3614195BerlinGermany
| | - Christian Limberg
- Institut für ChemieHumboldt-Universität zu BerlinBrook-Taylor-Straße 212489BerlinGermany
| | - Sebastian Riedel
- Fachbereich Biologie, Chemie, PharmazieInstitut für Chemie und Biochemie – Anorganische ChemieFreie Universität BerlinFabeckstraße 34/3614195BerlinGermany
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Becker PM, Förster C, Carrella LM, Boden P, Hunger D, van Slageren J, Gerhards M, Rentschler E, Heinze K. Spin Crossover and Long-Lived Excited States in a Reduced Molecular Ruby. Chemistry 2020; 26:7199-7204. [PMID: 32167607 PMCID: PMC7318154 DOI: 10.1002/chem.202001237] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Indexed: 12/27/2022]
Abstract
The chromium(III) complex [CrIII (ddpd)2 ]3+ (molecular ruby; ddpd=N,N'-dimethyl-N,N'-dipyridine-2-yl-pyridine-2,6-diamine) is reduced to the genuine chromium(II) complex [CrII (ddpd)2 ]2+ with d4 electron configuration. This reduced molecular ruby represents one of the very few chromium(II) complexes showing spin crossover (SCO). The reversible SCO is gradual with T1/2 around room temperature. The low-spin and high-spin chromium(II) isomers exhibit distinct spectroscopic and structural properties (UV/Vis/NIR, IR, EPR spectroscopies, single-crystal XRD). Excitation of [CrII (ddpd)2 ]2+ with UV light at 20 and 290 K generates electronically excited states with microsecond lifetimes. This initial study on the unique reduced molecular ruby paves the way for thermally and photochemically switchable magnetic systems based on chromium complexes complementing the well-established iron(II) SCO systems.
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Affiliation(s)
- Patrick M. Becker
- Department of ChemistryJohannes Gutenberg University of MainzDuesbergweg 10-1455128MainzGermany
| | - Christoph Förster
- Department of ChemistryJohannes Gutenberg University of MainzDuesbergweg 10-1455128MainzGermany
| | - Luca M. Carrella
- Department of ChemistryJohannes Gutenberg University of MainzDuesbergweg 10-1455128MainzGermany
| | - Pit Boden
- Department of Chemistry and Research Center OptimasUniversity KaiserslauternErwin-Schrödinger-Straße67663KaiserslauternGermany
| | - David Hunger
- Institute of Physical Chemistry and Center for, Integrated Quantum Science and TechnologyUniversity of StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Joris van Slageren
- Institute of Physical Chemistry and Center for, Integrated Quantum Science and TechnologyUniversity of StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Markus Gerhards
- Department of Chemistry and Research Center OptimasUniversity KaiserslauternErwin-Schrödinger-Straße67663KaiserslauternGermany
| | - Eva Rentschler
- Department of ChemistryJohannes Gutenberg University of MainzDuesbergweg 10-1455128MainzGermany
| | - Katja Heinze
- Department of ChemistryJohannes Gutenberg University of MainzDuesbergweg 10-1455128MainzGermany
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Affiliation(s)
- Sason Shaik
- Institute of Chemistry The Hebrew University of Jerusalem Edmond J. Safra Campus, Givat Ram Jerusalem 9090401 Israel
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Cibian M, Hanan GS. Geometry and Spin Change at the Heart of a Cobalt(II) Complex: A Special Case of Solvatomorphism. Chemistry 2015; 21:9474-81. [DOI: 10.1002/chem.201500852] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Indexed: 11/05/2022]
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Askevold B, Khusniyarov MM, Kroener W, Gieb K, Müller P, Herdtweck E, Heinemann FW, Diefenbach M, Holthausen MC, Vieru V, Chibotaru LF, Schneider S. Square-planar ruthenium(II) complexes: control of spin state by pincer ligand functionalization. Chemistry 2014; 21:579-89. [PMID: 25359612 DOI: 10.1002/chem.201404282] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Indexed: 11/07/2022]
Abstract
Functionalization of the PNP pincer ligand backbone allows for a comparison of the dialkyl amido, vinyl alkyl amido, and divinyl amido ruthenium(II) pincer complex series [RuCl{N(CH2 CH2 PtBu2 )2 }], [RuCl{N(CHCHPtBu2 )(CH2 CH2 PtBu2 )}], and [RuCl{N(CHCHPtBu2 )2 }], in which the ruthenium(II) ions are in the extremely rare square-planar coordination geometry. Whereas the dialkylamido complex adopts an electronic singlet (S=0) ground state and energetically low-lying triplet (S=1) state, the vinyl alkyl amido and the divinyl amido complexes exhibit unusual triplet (S=1) ground states as confirmed by experimental and computational examination. However, essentially non-magnetic ground states arise for the two intermediate-spin complexes owing to unusually large zero-field splitting (D>+200 cm(-1) ). The change in ground state electronic configuration is attributed to tailored pincer ligand-to-metal π-donation within the PNP ligand series.
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Affiliation(s)
- Bjorn Askevold
- Department Chemie und Pharmazie, Universität Erlangen-Nürnberg, Egerlandstr. 1, 91058 Erlangen (Germany)
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Schneider S, Meiners J, Askevold B. Cooperative Aliphatic PNP Amido Pincer Ligands – Versatile Building Blocks for Coordination Chemistry and Catalysis. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100880] [Citation(s) in RCA: 235] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sven Schneider
- Department Chemie und Pharmazie, Friedrich‐Alexander‐ Universität Erlangen‐Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany
| | - Jenni Meiners
- Department Chemie und Pharmazie, Friedrich‐Alexander‐ Universität Erlangen‐Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany
| | - Bjorn Askevold
- Department Chemie und Pharmazie, Friedrich‐Alexander‐ Universität Erlangen‐Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany
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Wurzenberger X, Piotrowski H, Klüfers P. Ein stabiler molekularer Ausschnitt aus seltenen Eisen(II)-Mineralen: der quadratisch-planare High-Spin-d6-FeIIO4-Chromophor. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006898] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wurzenberger X, Piotrowski H, Klüfers P. A Stable Molecular Entity Derived from Rare Iron(II) Minerals: The Square-Planar High-Spin-d6 FeIIO4 Chromophore. Angew Chem Int Ed Engl 2011; 50:4974-8. [DOI: 10.1002/anie.201006898] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 02/16/2011] [Indexed: 11/10/2022]
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Askevold B, Khusniyarov MM, Herdtweck E, Meyer K, Schneider S. A square-planar ruthenium(II) complex with a low-spin configuration. Angew Chem Int Ed Engl 2011; 49:7566-9. [PMID: 20806300 DOI: 10.1002/anie.201002296] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bjorn Askevold
- Department Chemie, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching b. München, Germany
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Petrov AR, Bannenberg T, Daniliuc CG, Jones PG, Tamm M. The use of 1,2-dipiperidinoacetylene for the preparation of monometallic diaminoacetylene and homo- or heterobimetallic diaminodicarbene ruthenium(ii) complexes. Dalton Trans 2011; 40:10503-12. [DOI: 10.1039/c1dt10606f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Alex R Petrov
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, D-38106, Braunschweig, Germany
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Askevold B, Khusniyarov MM, Herdtweck E, Meyer K, Schneider S. Ein quadratisch-planarer Ruthenium(II)-Komplex mit Low-Spin- Konfiguration. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201002296] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Alonso P, Ara I, Arauzo A, García-Monforte M, Menjón B, Rillo C. σ-Organoniobium Compounds with [NbR4]− and NbR4 Stoichiometries. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201002666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Alonso P, Ara I, Arauzo A, García-Monforte M, Menjón B, Rillo C. σ-Organoniobium Compounds with [NbR4]− and NbR4 Stoichiometries. Angew Chem Int Ed Engl 2010; 49:6143-6. [DOI: 10.1002/anie.201002666] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Carrasco R, Aullón G, Alvarez S. X-X through-cage bonding in Cu, Ni, and Cr complexes with M3X2 cores (X=S, As). Chemistry 2009; 15:536-46. [PMID: 19025739 DOI: 10.1002/chem.200800914] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Density functional calculations on trinuclear complexes bridged by two sulfur atoms, [(tmeda)(3)Cu(3)(mu-S)(2)](3+), [(tmeda)(3)Ni(3)(mu-S)(2)](2+), and [(tmeda)(3)Ni(3)(mu-S(2))](4+), as well as on the formation of [(tmeda)(3)Cu(3)(mu-S)(2)](3+) from a dinuclear [(tmeda)(2)Cu(2)(mu-S(2))](2+) complex and a mononuclear [(tmeda)Cu(eta(2)-S(2))](+) fragment, are reported. A qualitative orbital analysis of the M(3)X(2) framework bonding is presented for the case in which each metal atom M has a square planar coordination sphere completed by one bidentate or two monodentate ligands (that is, [(L(2)M)(3)X(2)] compounds). It is concluded that a framework electron count (FEC) of 12 corresponds to systems with six M-X bonds but no X-X bond through the cage, while an FEC of 10 favors the formation of an X-X bond. Framework electron counting rules are also presented for related M(3)X(2) cores in [(L(5)M)(3)X(2)] complexes, based on a qualitative molecular orbital (MO) analysis supported by DFT calculations on [(OC)(15)Cr(3)(mu-As(2))].
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Affiliation(s)
- Rosa Carrasco
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
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Ruiz-Martínez A, Casanova D, Alvarez S. Polyhedral structures with an odd number of vertices: nine-coordinate metal compounds. Chemistry 2008; 14:1291-303. [PMID: 18000919 DOI: 10.1002/chem.200701137] [Citation(s) in RCA: 253] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The stereochemistry of nine-coordinate transition-metal and rare-earth compounds has been studied by means of continuous shape measures (CShM) and related tools. Several reference nine-vertex polyhedra have been defined and their minimal distortion interconversion paths established. A theoretical shape map is presented in which the structures can be placed according to their distances in CShM space to the capped square antiprism and the tricapped trigonal prism, which are the most common polyhedra in nine-coordinate compounds. The structures of almost 2000 metal coordination spheres in molecular and extended solid-state compounds have been analyzed. Clear stereochemical trends can be established for subsets of these compounds grouped according to the nature of their ligands, which include families of compounds spread along the interconversion paths between the capped square antiprism and the capped cube, or between the tricapped trigonal prism and the tridiminished icosahedron.
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Affiliation(s)
- Antonio Ruiz-Martínez
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franqués 1-11, 08028 Barcelona, Spain
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Alonso PJ, Arauzo AB, Forniés J, García-Monforte MA, Martín A, Martínez JI, Menjón B, Rillo C, Sáiz-Garitaonandia JJ. A Square-Planar Organoiron(III) Compound with a Spin-Admixed State. Angew Chem Int Ed Engl 2006; 45:6707-11. [PMID: 16977656 DOI: 10.1002/anie.200601774] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Pablo J Alonso
- Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza and C.S.I.C. C/Pedro Cerbuna 12, Zaragoza, Spain.
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Alonso PJ, Arauzo AB, Forniés J, García-Monforte MA, Martín A, Martínez JI, Menjón B, Rillo C, Sáiz-Garitaonandia JJ. A Square-Planar Organoiron(III) Compound with a Spin-Admixed State. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200601774] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cirera J, Ruiz E, Alvarez S. Shape and Spin State in Four-Coordinate Transition-Metal Complexes: The Case of the d6 Configuration. Chemistry 2006; 12:3162-7. [PMID: 16453356 DOI: 10.1002/chem.200501516] [Citation(s) in RCA: 134] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Generalized polyhedral interconversion coordinates are defined within the framework of Avnir's continuous shape measures. The application of such interconversion coordinates to the study of the potential energy surfaces that define the stereochemical choice in four-coordinate transition metal complexes with different spin states is presented, and the correlation between potential energy curves and distribution of experimental structures along the tetrahedron to square interconversion path is shown for the case of the d(6) transition-metal complexes.
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Affiliation(s)
- Jordi Cirera
- Departament de Química Inorgànica and Centre de Recerca en Química Teòrica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
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