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Schwarz JF, Gadermayr L, Redl S, Holtrichter-Rößmann T, Paulik C, Schwarzinger C. Structural Characterization of BIAN Type Molecules Used in Viscosity Reduction of Alkyl Magnesium Solutions. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020489. [PMID: 36677555 PMCID: PMC9865295 DOI: 10.3390/molecules28020489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/22/2022] [Accepted: 12/31/2022] [Indexed: 01/06/2023]
Abstract
N1,N2-diphenylacenaphthylene-1,2-diimines (BIANs) have been used to reduce the undesired high viscosity of alkyl magnesium solutions, which are known to form polymeric structures. In order to understand the mechanisms, analyses of the BIAN alkyl magnesium solutions have been carried out under inert conditions with SEC-MS, NMR, and FTIR and were compared to the structures obtained from HPLC-MS, FTIR, and NMR after aqueous workup. While viscosity reduction was shown for all BIAN derivatives used, only the bis (diisopropyl)-substituted BIAN could be clearly assigned to a single reaction product, which also could be reused without loss of efficiency or decomposition. All other derivatives have been shown to behave differently, even under inert conditions, and decompose upon contact with acidic solvents. While the chemical reactions observed after the workup of the used BIANs are dominated by (multiple) alkylation, mainly on the C = N double bond, the observation of viscosity reduction cannot be assigned to this reaction alone, but to the interaction of the nitrogen atoms of BIANs with the Mg of the alkyl magnesium polymers, as could be shown by FTIR and NMR measurements under inert conditions.
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Affiliation(s)
- Julia Felicitas Schwarz
- Institute for Chemical Technology of Organic Materials, Johannes Kepler University (JKU), Altenberger Strasse 69, 4040 Linz, Austria
| | - Lukas Gadermayr
- Institute for Chemical Technology of Organic Materials, Johannes Kepler University (JKU), Altenberger Strasse 69, 4040 Linz, Austria
| | - Samuel Redl
- Institute of Inorganic Chemistry, Johannes Kepler University (JKU), Altenberger Strasse 69, 4040 Linz, Austria
| | | | - Christian Paulik
- Institute for Chemical Technology of Organic Materials, Johannes Kepler University (JKU), Altenberger Strasse 69, 4040 Linz, Austria
| | - Clemens Schwarzinger
- Institute for Chemical Technology of Organic Materials, Johannes Kepler University (JKU), Altenberger Strasse 69, 4040 Linz, Austria
- Correspondence:
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2
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Modified Magnesium Alkyls for Ziegler–Natta Catalysts. Catalysts 2022. [DOI: 10.3390/catal12090973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Magnesium alkyls such as butyl octyl magnesium and butyl ethyl magnesium are used as precursors for highly active and water-free magnesium chloride support materials for Ziegler–Natta catalysts. These alkyls show a high viscosity in hydrocarbon solvents which negatively affect their industrial application. Density functional theory (DFT) calculations supported the hypothesis that magnesium alkyls can form oligomeric chain structures responsible for the high viscosity. Heterocumulenes such as isocyanates, isothiocyanates and carbodiimides were studied as additives reducing the viscosity, supported by DFT calculations. The modified alkyls have further been tested in catalyst synthesis and in the polymerization of ethylene. The polymerization results showed high activities and similar polymer properties compared with a catalyst prepared without modified magnesium alkyl.
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3
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Anga S, Karmakar H, Panda TK, Chandrasekhar V. Alkali metal complexes of an unsymmetrical imino–phosphanamidinate (N-P-N) ligand. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Obi AD, Freeman LA, Dickie DA, Gilliard RJ. N-Heterocyclic Carbene-Mediated Ring Opening of Reduced Diazamagnesacycles. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00620] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Akachukwu D. Obi
- Department of Chemistry, University of Virginia, 409 McCormick Road, PO Box 400319, Charlottesville, Virginia 22904, United States
| | - Lucas A. Freeman
- Department of Chemistry, University of Virginia, 409 McCormick Road, PO Box 400319, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, 409 McCormick Road, PO Box 400319, Charlottesville, Virginia 22904, United States
| | - Robert J. Gilliard
- Department of Chemistry, University of Virginia, 409 McCormick Road, PO Box 400319, Charlottesville, Virginia 22904, United States
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5
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Huergo E, Fernández-Galán R, Ramos A, Antiñolo A, Carrillo-Hermosilla F, Rodríguez-Diéguez A, García-Vivó D. Reactivity of N-Phosphinoguanidines of the Formula (HNR)(Ph 2PNR)C(NAr) toward Main Group Metal Alkyls: Facile Ligand Rearrangement from N-Phosphinoguanidinates to Phosphinimine-Amidinates. Inorg Chem 2020; 59:15262-15275. [PMID: 33002356 DOI: 10.1021/acs.inorgchem.0c02224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the reactivity of N-phosphinoguanidines of the formula (HNR)(Ph2PNR)C(NAr) (R = iPr and Ar = 2,6-iPr2C6H3 [Dipp] for 1a, R = iPr and Ar = 2,4,6-Me3C6H2 [Mes] for 1b, and R = Cy and Ar = Dipp for 1c), prepared in high yields from the corresponding trisubstituted guanidines, toward main group metal alkyls AlMe3, ZnEt2, MgnBu2, and nBuLi to obtain novel phosphinoguanidinato and phosphinimine-amidinato compounds. Reactions of 1a-c with AlMe3 at room temperature led to the kinetic phosphinoguanidinato products [Al{κ2-N,N'-(NR)C(NAr)(NRPPh2)}Me2] (2a-c), whereas the mild heating (60-80 °C) of solutions of 2a-c give the thermodynamic phosphinimine-amidinato products [Al{κ2-N,N'-(NR)C(NAr)(PPh2NR)}Me2] (3a-c) after ligand rearrangement. The reactions of equimolar amounts of 1a-c and ZnEt2 initially give solutions containing unstable phosphinoguanidinato compounds [Zn{κ2-N,P-(NR)C(NAr)(NRPPh2)}Et] (4a-c), which rearrange upon mild heating to the phosphinimine-amidinato derivatives [Zn{κ2-N,N'-(NR)C(NAr)(PPh2NR)}Et] (6a-c). Bis(phosphinoguanidinato) compounds [Zn{κ2-N,P-(NR)C(NAr)(NRPPh2)}2] (5a-c) can be obtained under mild conditions (<45 °C) in THF, whereas bis(phosphinimine-amidinato) compounds [Zn{κ2-N,N'-(NR)C(NAr)(PPh2NR)}2] (7a-c) are also accessible under more forcing conditions (55-100 °C) from (i) ZnEt2 and 1b,c (2 equiv), (ii) 6a and 1a, or (iii) 5b,c. Equimolar mixtures of MgnBu2 and 1a-c in THF at room temperature give unstable phosphinimine-amidinato monoalkyl products [Mg{κ2-N,N'-(NR)C(NAr)(PPh2NR)}nBu(THF)2] (8a-c), whereas 2 equiv of 1a,b are required to reach the bischelate compounds [Mg{κ2-N,N'-(NiPr)C(NAr)(PPh2NiPr)}2] (9a,b). Finally, phosphinoguanidinato compounds [Li{κ2-N,P-(NR)C(NDipp)(NRPPh2)}(THF)2] (10a,c) were obtained in the reactions of 1a,c with nBuLi in THF under ambient conditions. The removal of the solvent from solutions of 10a,c under partial vacuum leads to the dinuclear compounds [Li2{μ-κ2-N,N':κ1-N-(NR)C(NDipp)(NRPPh2)}2(THF)2] (11a,c) after the decoordination of one of the THF molecules in 10a,c and dimerization. Heating solutions of 10a,c at 60 °C triggers ligand rearrangement to give phosphinimine-amidinato compounds [Li{κ2-N,N'-(NR)C(NDipp)(PPh2NR)}(THF)2] (12a,c). We also propose a mechanism for the ligand rearrangement reaction from 10a to give 12a, supported by DFT calculations, which fits nicely with our experimental results. It essentially involves a carbodiimide deinsertion reaction followed by a [3 + 2] cycloaddition between the resulting lithium phosphino-amide and the carbodiimide.
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Affiliation(s)
- Estefanía Huergo
- Departamento de Quı́mica Inorgánica, Orgánica y Bioquı́mica-Centro de Innovación en Quı́mica Avanzada (ORFEO-CINQA), Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain
| | - Rafael Fernández-Galán
- Departamento de Quı́mica Inorgánica, Orgánica y Bioquı́mica-Centro de Innovación en Quı́mica Avanzada (ORFEO-CINQA), Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain
| | - Alberto Ramos
- Departamento de Quı́mica Inorgánica, Orgánica y Bioquı́mica-Centro de Innovación en Quı́mica Avanzada (ORFEO-CINQA), Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain
| | - Antonio Antiñolo
- Departamento de Quı́mica Inorgánica, Orgánica y Bioquı́mica-Centro de Innovación en Quı́mica Avanzada (ORFEO-CINQA), Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain
| | - Fernando Carrillo-Hermosilla
- Departamento de Quı́mica Inorgánica, Orgánica y Bioquı́mica-Centro de Innovación en Quı́mica Avanzada (ORFEO-CINQA), Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain
| | - Antonio Rodríguez-Diéguez
- Departamento de Quı́mica Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida de la Fuente Nueva S/N, 18071 Granada, Spain
| | - Daniel García-Vivó
- Departamento de Quı́mica Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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6
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Okokhere-Edeghoghon B, Dehmel M, Hill MS, Kretschmer R, Mahon MF, McMullin CL, Morris LJ, Rajabi NA. Nucleophilic Magnesium Silanide and Silaamidinate Derivatives. Inorg Chem 2020; 59:13679-13689. [DOI: 10.1021/acs.inorgchem.0c02034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Maximilian Dehmel
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Robert Kretschmer
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Claire L. McMullin
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Louis J. Morris
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Nasir A. Rajabi
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
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7
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Freeman LA, Walley JE, Obi AD, Wang G, Dickie DA, Molino A, Wilson DJD, Gilliard RJ. Stepwise Reduction at Magnesium and Beryllium: Cooperative Effects of Carbenes with Redox Non-Innocent α-Diimines. Inorg Chem 2019; 58:10554-10568. [PMID: 31124671 DOI: 10.1021/acs.inorgchem.9b01058] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the past two decades, the organometallic chemistry of the alkaline earth elements has experienced a renaissance due in part to developments in ligand stabilization strategies. In order to expand the scope of redox chemistry known for magnesium and beryllium, we have synthesized a set of reduced magnesium and beryllium complexes and compared their resulting structural and electronic properties. The carbene-coordinated alkaline earth-halides, (Et2CAAC)MgBr2 (1), (SIPr)MgBr2 (2), (Et2CAAC)BeCl2 (3), and (SIPr)BeCl2 (4) [Et2CAAC = diethyl cyclic(alkyl)(amino) carbene; SIPr = 1,3-bis(2,6-diisopropylphenyl)-4,5-dihydroimidazole-2-ylidene] were combined with an α-diimine [2,2-bipyridine (bpy) or bis(2,6-diisopropylphenyl)-1,4-diazabutadiene (DippDAB)] and the appropriate stoichiometric amount of potassium graphite to form singly- and doubly-reduced compounds (Et2CAAC)MgBr(DippDAB) (5), (Et2CAAC)MgBr(bpy) (6), (Et2CAAC)Mg(DippDAB) (7), (Et2CAAC)Be(bpy) (8), and (SIPr)Be(bpy) (9). The doubly-reduced compounds 7-9 exhibit substantial π-bonding interactions across the diimine core, metal center, and π-acidic carbene. Each complex was fully characterized by UV-vis, FT-IR, X-ray crystallography, 1H, 13C, and 9Be NMR, or EPR where applicable. We use these compounds to highlight the differences in the organometallic chemistry of the lightest alkaline earth metals, magnesium and beryllium, in an otherwise identical chemical environment.
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Affiliation(s)
- Lucas A Freeman
- Department of Chemistry , University of Virginia , 409 McCormick Road , PO Box 400319, Charlottesville , Virginia 22904 , United States
| | - Jacob E Walley
- Department of Chemistry , University of Virginia , 409 McCormick Road , PO Box 400319, Charlottesville , Virginia 22904 , United States
| | - Akachukwu D Obi
- Department of Chemistry , University of Virginia , 409 McCormick Road , PO Box 400319, Charlottesville , Virginia 22904 , United States
| | - Guocang Wang
- Department of Chemistry , University of Virginia , 409 McCormick Road , PO Box 400319, Charlottesville , Virginia 22904 , United States
| | - Diane A Dickie
- Department of Chemistry , University of Virginia , 409 McCormick Road , PO Box 400319, Charlottesville , Virginia 22904 , United States
| | - Andrew Molino
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science , La Trobe University , Bundoora , Victoria 3083 , Australia
| | - David J D Wilson
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science , La Trobe University , Bundoora , Victoria 3083 , Australia
| | - Robert J Gilliard
- Department of Chemistry , University of Virginia , 409 McCormick Road , PO Box 400319, Charlottesville , Virginia 22904 , United States
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8
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Banerjee I, Harinath A, Panda TK. Alkali Metal Catalysed Double Hydrophosphorylation of Nitriles and Alkynes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900164] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Indrani Banerjee
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi – 502 285, Sangareddy, Telangana India
| | - Adimulam Harinath
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi – 502 285, Sangareddy, Telangana India
| | - Tarun K. Panda
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi – 502 285, Sangareddy, Telangana India
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9
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Chlupatý T, Bílek M, Merna J, Brus J, RůŽičková Z, Strassner T, RůŽička A. The addition of Grignard reagents to carbodiimides. The synthesis, structure and potential utilization of magnesium amidinates. Dalton Trans 2019; 48:5335-5342. [PMID: 30941391 DOI: 10.1039/c9dt00880b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Direct synthesis of magnesium amidinates of the general formula [RNC(R1)NR]MgR2 has been performed from appropriate carbodimide and Grignard reagents (R = iPr, Cy, pTol; R1 = Me, nBu; R2 = nBu, Cl, I). Magnesium bisamidinates of the composition [RNC(R1)NR]2Mg(solvent)2 are accessible from [RNC(R1)NR]MgR2 and via the Schlenk-like equilibrium in coordinating solvents. The only isolated amidinatomagnesium halide, preserved in the dinuclear form of {[pTolNC(Me)N-pTol]Mg(THF)}2-μ-(THF)-μ-(Cl)2, has been obtained from the reaction of pTol-N[double bond, length as m-dash]C[double bond, length as m-dash]N-pTol with MeMgCl(THF)n in hexane. The reaction of pTol-N[double bond, length as m-dash]C[double bond, length as m-dash]N-pTol with two equivalents of MeMgI gives an unprecedented dinuclear cyclic adduct {μ-[pTolNC(Me)N-pTol][MgI(OEt2)]2-μ-Me}. The structures of these complexes have been investigated by NMR spectroscopy, sc-XRD and theoretical methods. Selected complexes have been tested as initiators of ring-opening polymerization reactions with various substrates, the copolymerization of oxiranes and CO2 as well as the esterification of lactides.
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Affiliation(s)
- Tomáš Chlupatý
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
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10
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Baishya A, Kumar L, Barman MK, Biswal HS, Nembenna S. N-Heterocyclic Carbene–Carbodiimide (“NHC–CDI”) Adduct or Zwitterionic-Type Neutral Amidinate-Supported Magnesium(II) and Zinc(II) Complexes. Inorg Chem 2017; 56:9535-9546. [DOI: 10.1021/acs.inorgchem.7b00879] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ashim Baishya
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Homi Bhabha National Institute (HBNI), Bhubaneswar 752 050, India
| | - Lokesh Kumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Homi Bhabha National Institute (HBNI), Bhubaneswar 752 050, India
| | - Milan Kr. Barman
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Homi Bhabha National Institute (HBNI), Bhubaneswar 752 050, India
| | - Himansu S. Biswal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Homi Bhabha National Institute (HBNI), Bhubaneswar 752 050, India
| | - Sharanappa Nembenna
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Homi Bhabha National Institute (HBNI), Bhubaneswar 752 050, India
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11
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Ren W, Gu D. An Azobenzenyl Anion Radical Complex of Magnesium: Synthesis, Structure, and Reactivity Studies. Inorg Chem 2016; 55:11962-11970. [PMID: 27802033 DOI: 10.1021/acs.inorgchem.6b02114] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Azobenzenyl anion radical complex of magnesium [HC(C(Me)N-2,6-iPr2C6H3)2]Mg(PhNNPh) (THF) (2) was obtained for the first time through the reaction of [HC(C(Me)N-2,6-iPr2C6H3)2]MgBr (1) with potassium graphite in the presence of azobenzene. Complex 2 is a useful electron-transfer reagent as shown by the reactivity with diphenyl disulfide, diphenyl diselenide, oxygen, sulfur, and Me3SiN3 yielding the magnesium thiolate [HC(C(Me)N-2,6-iPr2C6H3)2]Mg(SPh)(THF) (3), magnesium selenolate [HC(C(Me)N-2,6-iPr2C6H3)2]Mg(SePh)(THF) (4), peroxido complex {[HC(C(Me)N-2,6-iPr2C6H3)2]Mg(THF)}2(μ-η2-η2-O2) (5), persulfido complex {[HC(C(Me)N-2,6-iPr2C6H3)2]Mg(THF)}2(μ-η2-η2-S2) (6), and azido complex [HC(C(Me)N-2,6-iPr2C6H3)2]MgN3 (7), respectively. Furthermore, treatment of 2 with Me3SiCHN2 results in a rearrangement product {[HC(C(Me)N-2,6-iPr2C6H3)2]Mg[CNN(SiMe3)]}2 (8).
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Affiliation(s)
- Wenshan Ren
- College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China
| | - Defa Gu
- College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China
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12
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Xi Y, Rajendran NM, Zhang W, Sun Y, Lei M, Sun WH. Quinolyl-Amidinates Chelating Bimetallic Magnesium and Mononuclear Aluminum Complexes forϵ-Caprolactone Polymerization. ChemistrySelect 2016. [DOI: 10.1002/slct.201601517] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yanxia Xi
- State Key Laboratory of Chemical Resource Engineering, Institute of Material Medicine, College of Science; Beijing University of Chemical Technology; Beijing 100029 China
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Natesan Mannangatti Rajendran
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Wenjuan Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Yang Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering, Institute of Material Medicine, College of Science; Beijing University of Chemical Technology; Beijing 100029 China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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13
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Loose F, Schmidtmann M, Saak W, Beckhaus R. Imines in the Titanium Coordination Sphere: η
1
‐Imine Complexes as Sources of Azavinylidenes and Four‐Membered Imine–Amido‐
N
,
N′
Chelates. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600995] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Florian Loose
- Institut für ChemieFakultät für Mathematik und NaturwissenschaftenCarl von Ossietzky Universität OldenburgPostfach 250326111OldenburgGermany
| | - Marc Schmidtmann
- Institut für ChemieFakultät für Mathematik und NaturwissenschaftenCarl von Ossietzky Universität OldenburgPostfach 250326111OldenburgGermany
| | - Wolfgang Saak
- Institut für ChemieFakultät für Mathematik und NaturwissenschaftenCarl von Ossietzky Universität OldenburgPostfach 250326111OldenburgGermany
| | - Rüdiger Beckhaus
- Institut für ChemieFakultät für Mathematik und NaturwissenschaftenCarl von Ossietzky Universität OldenburgPostfach 250326111OldenburgGermany
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14
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Cole ML, Junk PC. Synthesis and Structural Characterization of Some New Magnesium Formamidinates. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500659] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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