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van Terwingen S, Wendland L, Kalf I, Fränzl H, Englert U. Zwitterion coordination to configurationally flexible d
10 cations: synthesis and characterization of tetrakis(betaine) complexes of divalent Zn, Cd, and Hg. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2021-0101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The d
10 ions MII (M = Zn, Cd, Hg) and four equivalents of the neutral zwitterion trimethylglycine (betaine, bet) aggregate to discrete six-coordinated cationic complexes. With nitrate as counter anions, solids of the composition [M(bet)4](NO3)2·H2O are obtained. Their structural characterization reveals close relationship: they crystallize in metrically similar unit cells adopting three different subgroups of a hypothetical aristotype. In all cases, the divalent cations exhibit a strongly distorted coordination sphere in which two betaine ligands bind with both carboxylato O atoms and the other two with only one oxygen to the cation. Non-coordinating O atoms of different betaine ligands act as hydrogen bond acceptors towards co-crystallized water molecules. At least for the Pearson-soft HgII cations, this coordination is unexpected: to the best of our knowledge, HgII complexes with four carboxylato ligands have not yet been characterized. Without the necessity for charge balancing, the composition of zwitterion complexes is dominated by steric requirements and possibly by competition with alternative dipole molecules such as solvent water.
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Affiliation(s)
| | | | - Irmgard Kalf
- Institute of Inorganic Chemistry, RWTH Aachen University , Aachen , Germany
| | | | - Ulli Englert
- Institute of Inorganic Chemistry, RWTH Aachen University , Aachen , Germany
- Institute of Molecular Science, Shanxi University , Taiyuan , Shanxi 030006 , People’s Republic of China
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Deubner HL, Koester M, von Haenisch C, Kraus F. Synthesis and crystal structure of tri-ethyl-ammonium hexa-bromido-uranate(IV) di-chloro-methane monosolvate. Acta Crystallogr E Crystallogr Commun 2020; 76:1587-1590. [PMID: 33117569 PMCID: PMC7534249 DOI: 10.1107/s205698902001169x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 08/25/2020] [Indexed: 11/10/2022]
Abstract
Tri-ethyl-ammonium hexa-bromido-uranate(IV) di-chloro-methane monosolvate, [(C2H5)3NH]2[UBr6]·CH2Cl2, was obtained in the form of dark-brown crystals from the reaction of uranium penta-bromide with NEt3 and ethyl-ene glycol in di-chloro-methane at low temperature. During the progress of the reaction, the reduction of uranium(V) to uranium(IV) was observed, whose associated oxidation product could not be identified. The uranium atom of the [UBr6]2- anion is coordinated by six bromido ligands in the shape of an octa-hedron. Between cations, anion and solvent mol-ecules of crystallization, numerous C-H⋯Hal hydrogen-bond-like inter-actions are present, leading to a three-dimensional network structure.
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Affiliation(s)
- Holger Lars Deubner
- Anorganische Chemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Marcel Koester
- Anorganische Chemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Carsten von Haenisch
- Anorganische Chemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Florian Kraus
- Anorganische Chemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
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Ganguly G, Ludowieg HD, Autschbach J. Ab Initio Study of Vibronic and Magnetic 5f-to-5f and Dipole-Allowed 5f-to-6d and Charge-Transfer Transitions in [UX6]n− (X = Cl, Br; n = 1, 2). J Chem Theory Comput 2020; 16:5189-5202. [DOI: 10.1021/acs.jctc.0c00386] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Gaurab Ganguly
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Herbert D. Ludowieg
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
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4
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Schnaars DD, Wilson RE. Lattice Solvent and Crystal Phase Effects on the Vibrational Spectra of UO2Cl42–. Inorg Chem 2014; 53:11036-45. [DOI: 10.1021/ic501553m] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- David D. Schnaars
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Richard E. Wilson
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
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5
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Hashem E, McCabe T, Schulzke C, Baker RJ. Synthesis, structure and photophysical properties of [UO2X2(OPPh3)2] (X = Cl, Br, I). Dalton Trans 2014; 43:1125-31. [DOI: 10.1039/c3dt52480a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Spencer LP, Yang P, Minasian SG, Jilek RE, Batista ER, Boland KS, Boncella JM, Conradson SD, Clark DL, Hayton TW, Kozimor SA, Martin RL, MacInnes MM, Olson AC, Scott BL, Shuh DK, Wilkerson MP. Tetrahalide complexes of the [U(NR)2]2+ ion: synthesis, theory, and chlorine K-edge X-ray absorption spectroscopy. J Am Chem Soc 2013; 135:2279-90. [PMID: 23320417 DOI: 10.1021/ja310575j] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Synthetic routes to salts containing uranium bis-imido tetrahalide anions [U(NR)(2)X(4)](2-) (X = Cl(-), Br(-)) and non-coordinating NEt(4)(+) and PPh(4)(+) countercations are reported. In general, these compounds can be prepared from U(NR)(2)I(2)(THF)(x) (x = 2 and R = (t)Bu, Ph; x = 3 and R = Me) upon addition of excess halide. In addition to providing stable coordination complexes with Cl(-), the [U(NMe)(2)](2+) cation also reacts with Br(-) to form stable [NEt(4)](2)[U(NMe)(2)Br(4)] complexes. These materials were used as a platform to compare electronic structure and bonding in [U(NR)(2)](2+) with [UO(2)](2+). Specifically, Cl K-edge X-ray absorption spectroscopy (XAS) and both ground-state and time-dependent hybrid density functional theory (DFT and TDDFT) were used to probe U-Cl bonding interactions in [PPh(4)](2)[U(N(t)Bu)(2)Cl(4)] and [PPh(4)](2)[UO(2)Cl(4)]. The DFT and XAS results show the total amount of Cl 3p character mixed with the U 5f orbitals was roughly 7-10% per U-Cl bond for both compounds, which shows that moving from oxo to imido has little effect on orbital mixing between the U 5f and equatorial Cl 3p orbitals. The results are presented in the context of recent Cl K-edge XAS and DFT studies on other hexavalent uranium chloride systems with fewer oxo or imido ligands.
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Affiliation(s)
- Liam P Spencer
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Graves CR, Yang P, Kozimor SA, Vaughn AE, Clark DL, Conradson SD, Schelter EJ, Scott BL, Thompson JD, Hay PJ, Morris DE, Kiplinger JL. Organometallic Uranium(V)−Imido Halide Complexes: From Synthesis to Electronic Structure and Bonding. J Am Chem Soc 2008; 130:5272-85. [DOI: 10.1021/ja711010h] [Citation(s) in RCA: 168] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ping Yang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | | | | | - David L. Clark
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | | | | | - Brian L. Scott
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - J. D. Thompson
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - P. Jeffrey Hay
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - David E. Morris
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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Crawford MJ, Mayer P. Synthesis, structural and computational investigations of UO2I42-: a structurally characterized U(VI)-I anion. Inorg Chem 2005; 44:5547-9. [PMID: 16060600 DOI: 10.1021/ic050231c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis and characterization of (Ph(4)P)(2)UO(2)I(4).2NCCH(3) is reported. The UO(2)I(4)(2-) anion is not only the first unambiguously characterized anion containing a uranium(VI)-iodine bond, but is also the last member of the UO(2)X(4)(2-) (X = Cl, Br, I) series to be unambiguously identified and structurally characterized, in contrast to salts of the UO(2)Cl(4)(2-) and UO(2)Br(4)(2-) anions, which have all been thoroughly investigated and structurally characterized. (Ph(4)P)(2)UO(2)I(4).2NCCH(3) was characterized using IR, Raman, (1)H, (13)C, and (31)P NMR spectroscopy as well as X-ray diffraction. In addition, a computational investigation of the UO(2)I(4)(2-) anion was undertaken and compared with the experimentally observed structure.
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Affiliation(s)
- Margaret-Jane Crawford
- Department of Chemistry and Biochemistry, Ludwig-Maximilians University, Munich, Germany.
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Crawford MJ, Ellern A, Karaghiosoff K, Mayer P, Nöth H, Suter M. Synthesis and Characterization of Heavier Dioxouranium(VI) Dihalides. Inorg Chem 2004; 43:7120-6. [PMID: 15500350 DOI: 10.1021/ic0354926] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis and characterization of the dioxouranium(VI) dibromide and iodide hydrates, UO(2)Br(2)x3H(2)O (1), [UO(2)Br(2)(OH(2))(2)](2) (2), and UO(2)I(2)x2H(2)Ox4Et(2)O (3), are reported. Moreover, adducts of UO(2)I(2) and UO(2)Br(2) with large, bulky OP(NMe(2))(3) and OPPh(3) ligands such as UO(2)I(2)(OP(NMe(2))(3))(2) (4), UO(2)Br(2)(OP(NMe(2))(3))(2) (5), and UO(2)I(2)(OPPh(3))(2)(6) are discussed. The structures of the following compounds were determined using single-crystal X-ray diffraction techniques: (1) monoclinic, P2(1)/c, a = 9.7376(8) A, b = 6.5471(5) A, c = 12.817(1) A, beta = 94.104(1) degrees , V = 815.0(1) A(3), Z = 4; (2) monoclinic, P2(1)/c, a = 6.0568(7) A, b = 10.5117(9) A, c = 10.362(1) A, beta = 99.62(1) degrees , V = 650.5(1) A(3), Z = 2; (4) tetragonal, P4(1)2(1)2, a = 10.6519(3) A, b = 10.6519(3) A, c = 24.0758(6) A, V = 2731.7(1) A(3), Z = 4; (5) tetragonal, P4(1)2(1)2, a = 10.4645(1) A, b = 10.4645(1) A, c = 23.7805(3) A, V = 2604.10(5) A(3), Z = 4, and (6) monoclinic, P2(1)/c, a = 9.6543(1) A, b = 18.8968(3) A, c = 10.9042(2) A, beta =115.2134(5) degrees , V = 1783.01(5) A(3), Z = 2. Whereas 1 and 2 are the first UO(2)Br(2) hydrates and the last missing members of the UO(2)X(2) hydrate (X = Cl --> I) series to be structurally characterized, 4 and 6 contain room-temperature stable U(VI)-I bonds with 4 being the first structurally characterized room temperature stable U(VI)-I compound which can be conveniently prepared on a gram scale in quantitative yield. The synthesis and characterization of 5 using an analogous halogen exchange reaction to that used for the preparation of 4 is also reported.
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Affiliation(s)
- Margaret-Jane Crawford
- Department of Chemistry and Biochemistry, Ludwig-Maximilians University, Butenandtstrasse 5-13 (Haus D), D-81377, Munich, Germany.
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