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Lauk S, Schäfer A. Pentaisopropyl Cyclopentadienyl: An Overview across the Periodic Table. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sergej Lauk
- Department of Chemistry, Faculty of Natural Sciences and Technology Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - André Schäfer
- Department of Chemistry, Faculty of Natural Sciences and Technology Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
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2
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Lauk S, Zimmer M, Morgenstern B, Huch V, Müller C, Sitzmann H, Schäfer A. Tetra- and Pentaisopropylcyclopentadienyl Complexes of Group 15 Elements. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sergej Lauk
- Saarland University, Faculty of Natural Sciences and Technology, Department of Chemistry, Campus Saarbrücken, 66123 Saarbrücken, Federal Republic of Germany
- University of Kaiserslautern, Department of Chemistry, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Federal Republic of Germany
| | - Michael Zimmer
- Saarland University, Faculty of Natural Sciences and Technology, Department of Chemistry, Campus Saarbrücken, 66123 Saarbrücken, Federal Republic of Germany
| | - Bernd Morgenstern
- Saarland University, Faculty of Natural Sciences and Technology, Department of Chemistry, Campus Saarbrücken, 66123 Saarbrücken, Federal Republic of Germany
| | - Volker Huch
- Saarland University, Faculty of Natural Sciences and Technology, Department of Chemistry, Campus Saarbrücken, 66123 Saarbrücken, Federal Republic of Germany
| | - Carsten Müller
- Saarland University, Faculty of Natural Sciences and Technology, Department of Chemistry, Campus Saarbrücken, 66123 Saarbrücken, Federal Republic of Germany
| | - Helmut Sitzmann
- University of Kaiserslautern, Department of Chemistry, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Federal Republic of Germany
| | - André Schäfer
- Saarland University, Faculty of Natural Sciences and Technology, Department of Chemistry, Campus Saarbrücken, 66123 Saarbrücken, Federal Republic of Germany
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3
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Smytschkow I, Gidt W, Kunz C, Sun Y, Langer J, Oelkers B, Böttcher T, Sitzmann H. Chromium(III) and Chromium(II) Phenolate Complexes with Bulky Alkylcyclopentadienyl Ligands. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Igor Smytschkow
- FB Chemie der TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Wjatscheslaw Gidt
- FB Chemie der TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Christoph Kunz
- FB Chemie der TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Yu Sun
- FB Chemie der TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Jens Langer
- Department Chemie und Pharmazie Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Lehrstuhl für Anorganische und Metallorganische Chemie Egerlandstr. 1 91058 Erlangen Germany
| | - Benjamin Oelkers
- FB Chemie der TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Tobias Böttcher
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Helmut Sitzmann
- FB Chemie der TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
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4
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Duncan Lyngdoh RH, Schaefer HF, King RB. Metal-Metal (MM) Bond Distances and Bond Orders in Binuclear Metal Complexes of the First Row Transition Metals Titanium Through Zinc. Chem Rev 2018; 118:11626-11706. [PMID: 30543419 DOI: 10.1021/acs.chemrev.8b00297] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This survey of metal-metal (MM) bond distances in binuclear complexes of the first row 3d-block elements reviews experimental and computational research on a wide range of such systems. The metals surveyed are titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, and zinc, representing the only comprehensive presentation of such results to date. Factors impacting MM bond lengths that are discussed here include (a) the formal MM bond order, (b) size of the metal ion present in the bimetallic core (M2) n+, (c) the metal oxidation state, (d) effects of ligand basicity, coordination mode and number, and (e) steric effects of bulky ligands. Correlations between experimental and computational findings are examined wherever possible, often yielding good agreement for MM bond lengths. The formal bond order provides a key basis for assessing experimental and computationally derived MM bond lengths. The effects of change in the metal upon MM bond length ranges in binuclear complexes suggest trends for single, double, triple, and quadruple MM bonds which are related to the available information on metal atomic radii. It emerges that while specific factors for a limited range of complexes are found to have their expected impact in many cases, the assessment of the net effect of these factors is challenging. The combination of experimental and computational results leads us to propose for the first time the ranges and "best" estimates for MM bond distances of all types (Ti-Ti through Zn-Zn, single through quintuple).
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Affiliation(s)
| | - Henry F Schaefer
- Centre for Computational Quantum Chemistry , University of Georgia , Athens , Georgia 30602 , United States
| | - R Bruce King
- Centre for Computational Quantum Chemistry , University of Georgia , Athens , Georgia 30602 , United States
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5
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Randall McClain K, Gould CA, Chakarawet K, Teat SJ, Groshens TJ, Long JR, Harvey BG. High-temperature magnetic blocking and magneto-structural correlations in a series of dysprosium(iii) metallocenium single-molecule magnets. Chem Sci 2018; 9:8492-8503. [PMID: 30568773 PMCID: PMC6256727 DOI: 10.1039/c8sc03907k] [Citation(s) in RCA: 332] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 10/18/2018] [Indexed: 01/08/2023] Open
Abstract
A series of dysprosium(iii) metallocenium salts, [Dy(CpiPr4R)2][B(C6F5)4] (R = H (1), Me (2), Et (3), iPr (4)), was synthesized by reaction of DyI3 with the corresponding known NaCpiPr4R (R = H, iPr) and novel NaCpiPr4R (R = Me, Et) salts at high temperature, followed by iodide abstraction with [H(SiEt3)2][B(C6F5)4]. Variation of the substituents in this series results in substantial changes in molecular structure, with more sterically-encumbering cyclopentadienyl ligands promoting longer Dy-C distances and larger Cp-Dy-Cp angles. Dc and ac magnetic susceptibility data reveal that these structural changes have a considerable impact on the magnetic relaxation behavior and operating temperature of each compound. In particular, the magnetic relaxation barrier increases as the Dy-C distance decreases and the Cp-Dy-Cp angle increases. An overall 45 K increase in the magnetic blocking temperature is observed across the series, with compounds 2-4 exhibiting the highest 100 s blocking temperatures yet reported for a single-molecule magnet. Compound 2 possesses the highest operating temperature of the series with a 100 s blocking temperature of 62 K. Concomitant increases in the effective relaxation barrier and the maximum magnetic hysteresis temperature are observed, with 2 displaying a barrier of 1468 cm-1 and open magnetic hysteresis as high as 72 K at a sweep rate of 3.1 mT s-1. Magneto-structural correlations are discussed with the goal of guiding the synthesis of future high operating temperature DyIII metallocenium single-molecule magnets.
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Affiliation(s)
- K Randall McClain
- US Navy , Naval Air Warfare Center , Weapons Division , Research Department , Chemistry Division , China Lake , California 93555 , USA .
| | - Colin A Gould
- Department of Chemistry , University of California, Berkeley , Berkeley , California 94720 , USA .
| | - Khetpakorn Chakarawet
- Department of Chemistry , University of California, Berkeley , Berkeley , California 94720 , USA .
| | - Simon J Teat
- Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Thomas J Groshens
- US Navy , Naval Air Warfare Center , Weapons Division , Research Department , Chemistry Division , China Lake , California 93555 , USA .
| | - Jeffrey R Long
- Department of Chemistry , University of California, Berkeley , Berkeley , California 94720 , USA .
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
- Department of Chemical and Biomolecular Engineering , University of California, Berkeley , Berkeley , California 94720 , USA
| | - Benjamin G Harvey
- US Navy , Naval Air Warfare Center , Weapons Division , Research Department , Chemistry Division , China Lake , California 93555 , USA .
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6
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Gidt W, Smytschkow I, Sun Y, Langer J, Böttcher T, Kratzert D, Klingele J, Oelkers B, Sitzmann H. Paramagnetic Chromium(II) Complexes and Chromium(IV) Nitrides with Bulky Alkylcyclopentadienyl Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wjatscheslaw Gidt
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Igor Smytschkow
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Yu Sun
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Jens Langer
- Department Chemie und Pharmazie Friedrich Alexander Universität Erlangen‐Nürnberg Lehrstuhl für Anorganische und Metallorganische Chemie Egerlandstr. 1 91058 Erlangen Germany
| | - Tobias Böttcher
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Daniel Kratzert
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Julia Klingele
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Benjamin Oelkers
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
| | - Helmut Sitzmann
- FB Chemie TU Kaiserslautern Erwin‐Schrödinger‐Str. 54 67663 Kaiserslautern Germany
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7
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Tsuno T, Sugiyama Y, Brunner H, Bodensteiner M, Lee K. Synthesis and structural characterization of Ni(II) complexes with the chiral CpH(PNMent) tripod ligand. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1390222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Takashi Tsuno
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Chiba, Japan
| | - Yu Sugiyama
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Chiba, Japan
| | - Henri Brunner
- Institut für Anorganische Chemie, Universität Regensburg, Regensburg, Germany
| | | | - Kosei Lee
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Chiba, Japan
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8
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Lu T, Yang CF, Zhang LY, Fei F, Chen XT, Xue ZL. Metal Complexes with a Hexadentate Macrocyclic Diamine-Tetracarbene Ligand. Inorg Chem 2017; 56:11917-11928. [DOI: 10.1021/acs.inorgchem.7b01896] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Taotao Lu
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Chu-Fan Yang
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Li-Yi Zhang
- State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Fuzhou 350002, P. R. China
| | - Fan Fei
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xue-Tai Chen
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zi-Ling Xue
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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9
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Hitzel S, Färber C, Bruhn C, Siemeling U. Phosphido complexes derived from 1,1'-ferrocenediyl-bridged secondary diphosphines. Dalton Trans 2017; 46:6333-6348. [PMID: 28453009 DOI: 10.1039/c7dt00941k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper focuses on ferrocene-based secondary diphosphines of the type [Fe{η5-C5H4(PHR)}2] with P-substituents of distinctly different steric and electronic properties, namely methyl, neopentyl (Np), tert-butyl, phenyl and 3,5-bis(trifluoromethyl)phenyl (XyF). The reaction of [Fe{η5-C5H4(PHPh)}2] (H21a) and [Fe{η5-C5H4(PHt-Bu)}2] (H21b) with n-BuLi in the presence of TMEDA afforded lithium diphosphides of the type [Li2(μ-1)(TMEDA)2], which contain a cyclic non-planar Li2P2 core. The analogous reactions of [Fe{η5-C5H4(PHMe)}2] (H21c) and [Fe{η5-C5H4(PHNp)}2] (H21d) furnished dimeric aggregates exhibiting a ladder-type Li4P4 motif, viz. [Li4(μ-1c)2(TMEDA)3] and [Li2(μ-1d)(TMEDA)]2. H21e (R = XyF) did not afford a stable lithium diphosphide. A Brønsted metathesis with Zr(NMe2)4 was possible with the aryl-substituted compounds H21a and H21e, leading to products of the type [{Zr(NMe2)3}2(μ-1)]. In contrast, the alkyl-substituted congeners H21b-H21d were inert towards Zr(NMe2)4. The reaction of [Fe{η5-C5H4(PHR)}2] with nickelocene afforded intractable mixtures of numerous products in the case of H21c and H21e. In the other three cases, compounds of the type [(NiCp)2(μ-1)] were isolated. For H21b and H21d a two-stepped reaction via a phosphino-phosphido intermediate of the type [NiCp(H1)] was observed, which could be isolated and fully characterised in the case of [NiCp(H1b)].
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Affiliation(s)
- Sandra Hitzel
- Institute of Chemistry, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany.
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10
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Han X, Lv J, Meng L, Li Q, Li X. The ground and excited-state electronic structures of sandwich compounds Cp 2(ME) 2 contain an (ME) 2 four-membered ring (Cp = C 5H 5; M = Ni, Pd, Pt; E = O, S, Se, Te). NEW J CHEM 2017. [DOI: 10.1039/c7nj02528a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electron excitation, nature of bonds, and aromaticity of the title compounds are correlated to the periods of M/E atoms.
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Affiliation(s)
- Xiaowei Han
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
| | - Jiao Lv
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
| | - Lingpeng Meng
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
- National Demonstration Center for Experimental Chemistry
| | - Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology
- Yantai University
- Yantai 264005
- China
| | - Xiaoyan Li
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- China
- National Demonstration Center for Experimental Chemistry
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11
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Campos J, López-Serrano J, Peloso R, Carmona E. Methyl Complexes of the Transition Metals. Chemistry 2016; 22:6432-57. [PMID: 26991740 DOI: 10.1002/chem.201504483] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Indexed: 01/11/2023]
Abstract
Organometallic chemistry can be considered as a wide area of knowledge that combines concepts of classic organic chemistry, that is, based essentially on carbon, with molecular inorganic chemistry, especially with coordination compounds. Transition-metal methyl complexes probably represent the simplest and most fundamental way to view how these two major areas of chemistry combine and merge into novel species with intriguing features in terms of reactivity, structure, and bonding. Citing more than 500 bibliographic references, this review aims to offer a concise view of recent advances in the field of transition-metal complexes containing M-CH3 fragments. Taking into account the impressive amount of data that are continuously provided by organometallic chemists in this area, this review is mainly focused on results of the last five years. After a panoramic overview on M-CH3 compounds of Groups 3 to 11, which includes the most recent landmark findings in this area, two further sections are dedicated to methyl-bridged complexes and reactivity.
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Affiliation(s)
- Jesús Campos
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Riccardo Peloso
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
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12
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Chakraborty U, Modl M, Mühldorf B, Bodensteiner M, Demeshko S, van Velzen NJC, Scheer M, Harder S, Wolf R. Pentaarylcyclopentadienyl Iron, Cobalt, and Nickel Halides. Inorg Chem 2016; 55:3065-74. [PMID: 26950693 DOI: 10.1021/acs.inorgchem.5b02896] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The preparation of new stable half-sandwich transition metal complexes, having a bulky cyclopentadienyl ligand C5(C6H4-4-Et)5 (Cp(Ar1)) or C5(C6H4-4-nBu)5 (Cp(Ar2)), is reported. The tetrahydrofuran (THF) adduct [Cp(Ar1)Fe(μ-Br)(THF)]2 (1a) was synthesized by reacting K[Cp(Ar1)] with [FeBr2(THF)2] in THF, and its molecular structure was determined by X-ray crystallography. Complex 1a easily loses its coordinated THF molecules under vacuum to form the solvent-free complex [Cp(Ar1)Fe(μ-Br)]2 (1b). The analogous complexes [Cp(Ar1)Co(μ-Br)]2 (2), [Cp(Ar1)Ni(μ-Br)]2 (3), and [Cp(Ar2)Ni(μ-Br)]2 (4) were synthesized from CoBr2 and [NiBr2(1,2-dimethoxyethane)]. The mononuclear, low-spin cobalt(III) and nickel(III) complexes [Cp(Ar2)MI2] (5, M = Co; 6, M = Ni) were prepared by reacting the radical Cp(Ar2) with NiI2 and CoI2. The complexes were characterized by NMR and UV-vis spectroscopies and by elemental analyses. Single-crystal X-ray structure analyses revealed that the dimeric complexes 1a, 1b, and 3 have a planar M2Br2 core, whereas 2 and 4 feature a puckered M2Br2 ring.
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Affiliation(s)
- Uttam Chakraborty
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Moritz Modl
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Bernd Mühldorf
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Michael Bodensteiner
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Serhiy Demeshko
- Institute of Inorganic Chemistry, University of Göttingen , D-37077 Göttingen, Germany
| | - Niels J C van Velzen
- Stratingh Institute for Chemistry , Nijenborgh 4, 9747 AG Groningen, Netherlands
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Sjoerd Harder
- Stratingh Institute for Chemistry , Nijenborgh 4, 9747 AG Groningen, Netherlands.,Inorganic and Organometallic Chemistry, Friedrich Alexander University Erlangen-Nürnberg , D-91058 Erlangen, Germany
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
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13
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Chakraborty U, Mühldorf B, van Velzen NJC, de Bruin B, Harder S, Wolf R. [CpArNi{Ga(nacnac)}]: An Open-Shell Nickel(I) Complex Supported by a Gallium(I) Carbenoid (CpAr = C5(C6H4-4-Et)5, nacnac = HC[C(Me)N-(C6H3)-2,6-iPr2]2). Inorg Chem 2016; 55:3075-8. [DOI: 10.1021/acs.inorgchem.5b02979] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Uttam Chakraborty
- University of Regensburg, Institute of Inorganic Chemistry, D-93040 Regensburg, Germany
| | - Bernd Mühldorf
- University of Regensburg, Institute of Inorganic Chemistry, D-93040 Regensburg, Germany
| | | | - Bas de Bruin
- University of Amsterdam, van’t Hoff Institute for Molecular Sciences, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Sjoerd Harder
- Stratingh Institute for Chemistry, Nijenborgh 4, 9747
AG Groningen, The Netherlands
- Friedrich Alexander University Erlangen-Nürnberg, Inorganic and Organometallic Chemistry, D-91058 Erlangen, Germany
| | - Robert Wolf
- University of Regensburg, Institute of Inorganic Chemistry, D-93040 Regensburg, Germany
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14
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Vollmer GY, Wallasch MW, Saurenz D, Eger TR, Bauer H, Wolmershäuser G, Prosenc MH, Sitzmann H. Benzylidyne Bridges from Diphenylacetylene and a Methylidyne Bridge from Methylmagnesium Chloride. Organometallics 2015. [DOI: 10.1021/om501236h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guy Y. Vollmer
- FB Chemie der TU, Erwin-Schrödinger-Straße
54, 67663 Kaiserslautern, Germany
| | - Mark W. Wallasch
- FB Chemie der TU, Erwin-Schrödinger-Straße
54, 67663 Kaiserslautern, Germany
| | - Dirk Saurenz
- FB Chemie der TU, Erwin-Schrödinger-Straße
54, 67663 Kaiserslautern, Germany
| | - Tobias R. Eger
- FB Chemie der TU, Erwin-Schrödinger-Straße
54, 67663 Kaiserslautern, Germany
| | - Heiko Bauer
- FB Chemie der TU, Erwin-Schrödinger-Straße
54, 67663 Kaiserslautern, Germany
| | | | - Marc H. Prosenc
- FB Chemie der TU, Erwin-Schrödinger-Straße
54, 67663 Kaiserslautern, Germany
| | - Helmut Sitzmann
- FB Chemie der TU, Erwin-Schrödinger-Straße
54, 67663 Kaiserslautern, Germany
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15
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Bauer H, Glöckner A, Tagne Kuate AC, Schäfer S, Sun Y, Freytag M, Tamm M, Walter MD, Sitzmann H. How big is a Cp? Novel cycloheptatrienyl zirconium complexes with tri-, tetra- and pentasubstituted cyclopentadienyl ligands. Dalton Trans 2014; 43:15818-28. [PMID: 25222005 DOI: 10.1039/c4dt01581a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The new bulky cyclopentadienyl anions 1,2,4-tri(cyclopentyl)cyclopentadienide and 2,3-diisopropyl-1,4-dimethyl-5-trimethylsilyl-cyclopentadienide were prepared. These and the already known 1,2,4-tri(cyclohexyl)-, 1,2,4-tri(isopropyl)-, 2,3-diisopropyl-1,4-dimethyl-, 1,3,4-triisopropyl-2,5-dimethyl-, pentaphenyl-, and p-butylphenyl-tetraphenyl-cyclopentadienide as well as tert-butylindenide were coordinated to the cycloheptatrienylzirconium fragment [(CHT)ZrCl(tmeda)]. The nine zirconium complexes of the [(CHT)Zr(Cp)] type were characterized by elemental analysis and NMR spectroscopy. For five of the sandwich complexes X-ray crystal structure determination could be carried out; structures of the four others were obtained by DFT calculations. The data serve as a basis for cone angle measurements of cyclopentadienyl ligands to evaluate the steric demand of these ligands.
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Affiliation(s)
- Heiko Bauer
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schroedinger Strasse, 67663 Kaiserslautern, Germany.
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Yao SA, Corcos AR, Infante I, Hillard EA, Clérac R, Berry JF. An "intermediate spin" nickel hydride complex stemming from delocalized Ni2(μ-H)2 bonding. J Am Chem Soc 2014; 136:13538-41. [PMID: 25208308 DOI: 10.1021/ja507342a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The nickel hydride complex [Cp'Ni(μ-H)]2 (1, Cp' = 1,2,3,4-tetraisopropylcyclopentadienyl) is found to have a strikingly short Ni-Ni distance of 2.28638(3) Å. Variable temperature and field magnetic measurements indicate an unexpected triplet ground state for 1 with a large zero-field splitting of +90 K (63 cm(-1)). Electronic structure calculations (DFT and CASSCF/CASPT2) explain this ground state as arising from half occupation of two nearly degenerate Ni-Ni π* orbitals.
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Affiliation(s)
- Shu A Yao
- Department of Chemistry, University of Wisconsin, Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
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17
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Schär M, Saurenz D, Zimmer F, Schädlich I, Wolmershäuser G, Demeshko S, Meyer F, Sitzmann H, Heigl OM, Köhler FH. Paramagnetic 18-Valence-Electron Alkylcyclopentadienylnickel(II) Bromide Dimers. Organometallics 2013. [DOI: 10.1021/om400606t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Marion Schär
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Dirk Saurenz
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Frank Zimmer
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Ina Schädlich
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Gotthelf Wolmershäuser
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Serhiy Demeshko
- Institut für
Anorganische Chemie, Georg-August-Universität, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Franc Meyer
- Institut für
Anorganische Chemie, Georg-August-Universität, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Helmut Sitzmann
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Strasse
54, 67663 Kaiserslautern, Germany
| | - Oliver M. Heigl
- Department Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Frank H. Köhler
- Department Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
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Kreye M, Glöckner A, Daniliuc CG, Freytag M, Jones PG, Tamm M, Walter MD. Sterically encumbered pyrrolyl ligands and their incorporation into the cycloheptatrienyl zirconium coordination sphere. Dalton Trans 2013. [DOI: 10.1039/c2dt32433d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Glöckner A, Bauer H, Maekawa M, Bannenberg T, Daniliuc CG, Jones PG, Sun Y, Sitzmann H, Tamm M, Walter MD. How big is a Cp? Cycloheptatrienyl zirconium complexes with bulky cyclopentadienyl and indenyl ligands. Dalton Trans 2012; 41:6614-24. [DOI: 10.1039/c2dt12132h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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