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Leitner D, Wittwer B, Neururer FR, Seidl M, Wurst K, Tambornino F, Hohloch S. Expanding the Utility of β-Diketiminate Ligands in Heavy Group VI Chemistry of Molybdenum and Tungsten. Organometallics 2023; 42:1411-1424. [PMID: 37388273 PMCID: PMC10302891 DOI: 10.1021/acs.organomet.3c00056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Indexed: 07/01/2023]
Abstract
We report the synthesis of 17 molybdenum and tungsten complexes supported by the ubiquitous BDI ligand framework (BDI = β-diketiminate). The focal entry point is the synthesis of four molybdenum and tungsten(V) BDI complexes of the general formula [MO(BDIR)Cl2] [M = Mo, R = Dipp (1); M = W, R = Dipp (2); M = Mo, R = Mes (3); M = W, R = Mes (4)] synthesized by the reaction between MoOCl3(THF)2 or WOCl3(THF)2 and LiBDIR. Reactivity studies show that the BDIDipp complexes are excellent precursors toward adduct formation, reacting smoothly with dimethylaminopyridine (DMAP) and triethylphosphine oxide (OPEt3). No reaction with small phosphines has been observed, strongly contrasting the chemistry of previously reported rhenium(V) complexes. Additionally, the complexes 1 and 2 are good precursors for salt metathesis reactions. While 1 can be chemically reduced to the first stable example of a Mo(IV) BDI complex 15, reduction of 2 resulted in degradation of the BDI ligand via a nitrene transfer reaction, leading to MAD (4-((2,6-diisopropylphenyl)imino)pent-2-enide) supported tungsten(V) and tungsten(VI) complexes 16 and 17. All reported complexes have been thoroughly studied by VT-NMR and (heteronuclear) NMR spectroscopy, as well as UV-vis and EPR spectroscopy, IR spectroscopy, and X-ray diffraction analysis.
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Affiliation(s)
- Daniel Leitner
- Faculty
of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical
Chemistry, University of Innsbruck, Innrain 80−82, Innsbruck 6020 Austria
| | - Benjamin Wittwer
- Faculty
of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical
Chemistry, University of Innsbruck, Innrain 80−82, Innsbruck 6020 Austria
| | - Florian R. Neururer
- Faculty
of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical
Chemistry, University of Innsbruck, Innrain 80−82, Innsbruck 6020 Austria
| | - Michael Seidl
- Faculty
of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical
Chemistry, University of Innsbruck, Innrain 80−82, Innsbruck 6020 Austria
| | - Klaus Wurst
- Faculty
of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical
Chemistry, University of Innsbruck, Innrain 80−82, Innsbruck 6020 Austria
| | - Frank Tambornino
- Fachbereich
Chemie and Wissenschaftlichen Zentrum für Materialwissenschaften
(WZMW), Phillips-University Marburg, Hans-Meerwein-Straße 4, 35043 Marburg, Germany
| | - Stephan Hohloch
- Faculty
of Chemistry and Pharmacy, Institute for General, Inorganic and Theoretical
Chemistry, University of Innsbruck, Innrain 80−82, Innsbruck 6020 Austria
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Ziółkowska A, Szynkiewicz N, Ponikiewski Ł. Experimental and theoretical investigation of the reactivity of [(BDI*)Ti(Cl){η 2-P(SiMe 3)-P iPr 2}] towards selected ketones. Dalton Trans 2021; 50:1390-1401. [PMID: 33433538 DOI: 10.1039/d0dt04014b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In this work, we report a new type of reactivity of [(BDI*)Ti(Cl){η2-P(SiMe3)-PiPr2}] (1) towards ketones (BDI* = 2,6-diisopropylphenyl-β-methyldiketiminate ligand). In the reaction of 1 with acetone, cyclopentanone or cyclohexanone, a ketone moiety is inserted into Ti-Pphosphanyl or Ti-Pphosphido bonds to form complexes with a new C-P-P moiety, providing [(BDI*)Ti(Cl){η2-P(SiMe3)-PiPr2-C(Me)2O}] (2a), [(BDI*)Ti(Cl){η2-OC(Me)2P(SiMe3)-PiPr2}] (2b), [(BDI*)Ti(Cl){η2-P(SiMe3)-P(iPr)2-{C(CH2)4}O}] (3a), and [(BDI*)Ti(Cl){η2-P(SiMe3)-P(iPr)2-{C(CH2)5}O}] (4a). Starting complex 1 reacts with cyclohexanone, yielding a monocrystalline complex [{(ArN[double bond, length as m-dash]C(Me)CHC(Me)[double bond, length as m-dash]NAr)C(CH2)5O}Ti(Cl){PiPr2-P(SiMe3)C(CH2)5O}] (4d) with the insertion of two ketone molecules. Interestingly, we found that monoinserted complexes 2a and 3a may be oxidized via a reaction with AgCl, leading to elimination of the -SiMe3 group and oxidation of the titanium atom. This reaction led us to isolate the Ti(iv) complex [(BDI*)Ti(Cl){η2-P-P(iPr)2-{C(CH2)5}O}] (5) in crystalline form. To identify the kinds of products that may be formed and determine which products are the most energetically favoured ones, we conducted a thermodynamic DFT study of 1 towards acetone, cyclopentanone and cyclohexanone. Structures 2a, 2b, 3a, 3e, 4a, 4d, and 5 were characterized by X-ray crystallography, and complex 5 was also identified by NMR spectroscopy.
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Affiliation(s)
- Aleksandra Ziółkowska
- Gdansk University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Gabriela Narutowicza Str. 11/12, 80-233 Gdansk, Poland.
| | - Natalia Szynkiewicz
- Gdansk University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Gabriela Narutowicza Str. 11/12, 80-233 Gdansk, Poland.
| | - Łukasz Ponikiewski
- Gdansk University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Gabriela Narutowicza Str. 11/12, 80-233 Gdansk, Poland.
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Ziółkowska A, Szynkiewicz N, Ponikiewski Ł. Two complementary approaches for the synthesis and isolation of stable phosphanylphosphaalkenes. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00550b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A new series of compounds formed in a one-step reaction (Phospha–Wittig or phospha–Peterson), containing the CP–P moiety was synthesized and characterized. These species are stable under atmospheric conditions and are resistant to hydrolysis.
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Affiliation(s)
- Aleksandra Ziółkowska
- Gdansk University of Technology
- Faculty of Chemistry
- Department of Inorganic Chemistry
- 80-233 Gdansk
- Poland
| | - Natalia Szynkiewicz
- Gdansk University of Technology
- Faculty of Chemistry
- Department of Inorganic Chemistry
- 80-233 Gdansk
- Poland
| | - Łukasz Ponikiewski
- Gdansk University of Technology
- Faculty of Chemistry
- Department of Inorganic Chemistry
- 80-233 Gdansk
- Poland
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Ziółkowska A, Szynkiewicz N, Pikies J, Ponikiewski Ł. Synthesis of compounds with C-P-P and C[double bond, length as m-dash]P-P bond systems based on the phospha-Wittig reaction. Dalton Trans 2020; 49:13635-13646. [PMID: 32975265 DOI: 10.1039/d0dt02728f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A reactivity study of a β-diketiminate titanium(iii) phosphanylphosphido complex [MeNacNacTi(Cl){η2-P(SiMe3)-PtBu2}] (1) towards ketones such as benzophenone, 9-fluorenone, acetophenone, cyclopentanone, cyclohexanone and cycloheptanone is reported. The reactions of 1 with aromatic ketones (without α-protons) directly lead to the Ti(iii) complex [MeNacNacTi(μ2-Cl)(OSiMe3)] (5) and Ti(iv) complexes with the pinacol condensation product [MeNacNacTi(OSiMe3)(η2-pinacolate)] (3), and phosphanylphosphaalkenes Ph2C[double bond, length as m-dash]P-PtBu2 (2) and (fluorenyl)C[double bond, length as m-dash]P-PtBu2 (6), respectively. The reaction with acetophenone leads to the titanium(iii) complex with the aldol condensation product as ligand [MeNacNacTi(Cl){OC{Me(Ph)}CH2(C[double bond, length as m-dash]O)Ph}] (8) and in parallel to phosphanylphosphaalkene (Ph)MeC[double bond, length as m-dash]P-PtBu2 (9) and 5. The reactions of 1 with cyclic ketones (cyclopentanone and cyclohexanone) lead to Ti(iii) complexes [{(ArN[double bond, length as m-dash]C(Me)CHC(Me)[double bond, length as m-dash]NAr)((CH2)4CO)}Ti(Cl){PtBu2-P(SiMe3)((CH2)4CO)}] (10) and [{(ArN[double bond, length as m-dash]C(Me)CHC(Me)[double bond, length as m-dash]NAr)((CH2)5CO)}Ti(Cl){PtBu2-P(SiMe3)((CH2)5CO)}] (11), which are formed via the successive insertion of two molecules of ketone to one molecule of 1. The stability investigation of complexes 10 and 11 in a polar solvent (THF) revealed that under these conditions, the complexes decompose, resulting in titanium(iii) complexes with aldol condensation products and the expected phosphanylphosphaalkenes (CH2)4C[double bond, length as m-dash]P-PtBu2 (10a) and (CH2)5C[double bond, length as m-dash]P-PtBu2 (11a). In the reaction of 1 with cycloheptanone, only the Ti(iii) complex with the aldol condensation product [MeNacNacTi(Cl){OC(CH2)6}CH(C[double bond, length as m-dash]O)(CH2)5] (12) was isolated. The structures 3, 5, 8, 10, 11, 11b and 12 were characterized by X-ray spectroscopy, while all the phosphanylphosphaalkenes were characterized by NMR spectroscopy.
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Affiliation(s)
- Aleksandra Ziółkowska
- Gdansk University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Gabriela Narutowicza Str. 11/12, 80-233 Gdansk, Poland.
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Kaniewska K, Ponikiewski Ł, Szynkiewicz N, Cieślik B, Pikies J, Krzystek J, Dragulescu-Andrasi A, Stoian SA, Grubba R. Homoleptic mono-, di-, and tetra-iron complexes featuring phosphido ligands: a synthetic, structural, and spectroscopic study. Dalton Trans 2020; 49:10091-10103. [PMID: 32661526 DOI: 10.1039/d0dt01503b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report the first series of homoleptic phosphido iron complexes synthesized by treating either the β-diketiminato complex [(Dippnacnac)FeCl2Li(dme)2] (Dippnacnac = HC[(CMe)N(C6H3-2,6-iPr2)]2) or [FeBr2(thf)2] with an excess of phosphides R2PLi (R = tBu, tBuPh, Cy, iPr). Reaction outcomes depend strongly on the bulkiness of the phosphido ligands. The use of tBu2PLi precursor led to an anionic diiron complex 1 encompassing a planar Fe2P2 core with two bridging and two terminal phosphido ligands. An analogous reaction employing less sterically demanding phosphides, tBuPhPLi and Cy2PLi yielded diiron anionic complexes 2 and 3, respectively, featuring a short Fe-Fe interaction supported by three bridging phosphido groups and one additional terminal R2P- ligand at each iron center. Further tuning of the P-substrates bulkiness gave a neutral phosphido complex 4 possessing a tetrahedral Fe4 cluster core held together by six bridging iPr2P moieties. Moreover, we also describe the first homoleptic phosphanylphosphido iron complex 5, which features an iron center with low coordination provided by three tBu2P-P(SiMe3)- ligands. The structures of compounds 1-5 were determined by single-crystal X-ray diffraction and 1-3 by 1H NMR spectroscopy. Moreover, the electronic structures of 1-3 were interrogated using zero-field Mössbauer spectroscopy and DFT methods.
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Affiliation(s)
- Kinga Kaniewska
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza St. 11/12, Gdańsk PL-80-233, Poland.
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Ziółkowska A, Szynkiewicz N, Pikies J, Ponikiewski Ł. Solvent Impact on the Diversity of Products in the Reaction of Lithium Diphenylphosphide and a Ti(III) Complex Supported by a tBu 2P-P(SiMe 3) Ligand. Inorg Chem 2020; 59:11305-11315. [PMID: 32799493 PMCID: PMC7458418 DOI: 10.1021/acs.inorgchem.0c00824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present two important trends in the reactivity of the titanium complex [MeNacNacTi(Cl){η2-P(SiMe3)-PtBu2}] (MeNacNac- = [Ar]NC(Me)CHC(Me)N[Ar]; Ar = 2,6-iPr2Ph) with nucleophilic reagents RLi (R = Ph2P, tBuO, (Me3Si)2N, and tBu2N) depending on the reaction medium. Reaction in nonpolar solvent (toluene) leads to three main products: via an autoredox process and nucleophilic substitution at the Ti-atom to afford the Ti(IV) complex [MeNacNacTi(R){η2-P-PtBu2}] (1 for R = PPh2), via the elimination of Me3SiR to afford Ti(III) complex [MeNacNacTi(Cl){η2-P-PtBu2}]-[Li(12-crown-4)2]+ (2), and via 2e- reduction process to afford new ionic complex [{ArNC(Me)CHC(Me)}Ti═NAr{η1-P(SiMe3)-PtBu2}]-[Li(12-crown-4)2]+ (3). Quite differently, the complex [MeNacNacTi(Cl){η2-P(SiMe3)-PtBu2}] reacts with Ph2PLi in THF, unexpectedly yielding two new, four-coordinate Ti(IV) imido complexes 4a [{ArNC(Me)═CHC(H)(Me)-P(PtBu2)}Ti═NAr(Cl)]-[Li(12-crown-4)2]+·(toluene)2 and 4b [{ArNC(CH2)CH═C(Me)-P(PtBu2)}Ti═NAr(Cl)]-[Li(12-crown-4)2]+·(Et2O). Complex 2 dissolved in THF converts to 4a and 4b. 1, 2, 3, 4a, and 4b were characterized by X-ray diffraction. 1, 4a, and 4b were also fully characterized by multinuclear NMR spectroscopy.
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Affiliation(s)
- A Ziółkowska
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str., 80-233 Gdansk, Poland
| | - N Szynkiewicz
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str., 80-233 Gdansk, Poland
| | - J Pikies
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str., 80-233 Gdansk, Poland
| | - Ł Ponikiewski
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str., 80-233 Gdansk, Poland
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Ordyszewska A, Szynkiewicz N, Chojnacki J, Pikies J, Grubba R. The Reactivity of Phosphanylphosphinidene Complexes of Transition Metals Toward Terminal Dihaloalkanes. Inorg Chem 2020; 59:5463-5474. [PMID: 32216307 PMCID: PMC7588032 DOI: 10.1021/acs.inorgchem.0c00091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The
reactivities of phosphanylphosphinidene complexes [(DippN)2W(Cl)(η2-P–PtBu2)]− (1), [(pTol3P)2Pt(η2-P=PtBu2)] (2), and [(dppe)Pt(η2-P=PtBu2)] (3) toward
dihaloalkanes and methyl iodide were investigated. The reactions of
the anionic tungsten complex (1) with stochiometric Br(CH2)nBr (n = 3,
4, 6) led to the formation of neutral complexes with a tBu2PP(CH2)3Br ligand or neutral
dinuclear complexes with unusual tetradentate tBu2PP(CH2)nPPtBu2 ligands (n = 4, 6). The methylation of platinum
complexes 2 and 3 with MeI yielded neutral
or cationic complexes bearing side-on coordinated tBu2P–P-Me moieties. The reaction of 2 with I(CH2)2I gave a platinum complex with
a tBu2P—P—I ligand. When
the same dihaloalkane was reacted with 3, the P—P
bond in the phosphanylphosphinidene ligand was cleaved to yield tBu2PI, phosphorus polymers, [(dppe)PtI2] and C2H4. Furthermore, the reaction of 3 with Br(CH2)2Br yielded dinuclear
complex bearing a tetraphosphorus tBu2PPPPtBu2 ligand in the coordination sphere
of the platinum. The molecular structures of the isolated products
were established in the solid state and in solution by single-crystal
X-ray diffraction and NMR spectroscopy. DFT studies indicated that
the polyphosphorus ligands in the obtained complexes possess structures
similar to free phosphenium cations tBu2P+=P−R (R = Me, I) or (tBu2P+=P)2. The phosphanylphosphinidene complexes of tungsten and platinum
as building blocks for syntheses of polydentate phosphorus ligands.
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Affiliation(s)
- Anna Ordyszewska
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Strasse 80-233 Gdańsk, Poland
| | - Natalia Szynkiewicz
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Strasse 80-233 Gdańsk, Poland
| | - Jarosław Chojnacki
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Strasse 80-233 Gdańsk, Poland
| | - Jerzy Pikies
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Strasse 80-233 Gdańsk, Poland
| | - Rafał Grubba
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Gabriela Narutowicza Strasse 80-233 Gdańsk, Poland
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Ziółkowska A, Szynkiewicz N, Pikies J, Ponikiewski Ł. Reactivity study of a β-diketiminate titanium(III) complex with a phosphanylphosphido ligand towards chlorophosphanes. A new method of synthesis of β-diketiminate titanium(IV) complexes with versatile phosphanylphosphinidenes. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.04.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Ziółkowska A, Brauer S, Ponikiewski Ł. First Copper(I) and Silver(I) Complexes Containing Phosphanylphosphido Ligands. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Aleksandra Ziółkowska
- Department of Inorganic Chemistry, Chemical Faculty; Gdansk University of Technology; Narutowitcza Str. 11/12 80233 Gdansk Poland
| | - Sandra Brauer
- Department of Inorganic Chemistry, Chemical Faculty; Gdansk University of Technology; Narutowitcza Str. 11/12 80233 Gdansk Poland
| | - Łukasz Ponikiewski
- Department of Inorganic Chemistry, Chemical Faculty; Gdansk University of Technology; Narutowitcza Str. 11/12 80233 Gdansk Poland
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Ziółkowska A, Szynkiewicz N, Ponikiewski Ł. Molecular Structures of the Phospha-Wittig Reaction Intermediate: Initial Step in the Synthesis of Compounds with a C═P–P Bond as Products in the Phospha-Wittig Reaction. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00192] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Aleksandra Ziółkowska
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str, 80-233 Gdansk, Poland
| | - Natalia Szynkiewicz
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str, 80-233 Gdansk, Poland
| | - Łukasz Ponikiewski
- Department of Inorganic Chemistry, Chemical Faculty, Gdansk University of Technology, 11/12 Gabriela Narutowicza Str, 80-233 Gdansk, Poland
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Jangir R, Kaleeswaran D, Murugavel R. 2,2′,6,6′-Tetraisopropylbenzidine-Based Sterically Encumbered DitopicC2-Symmetric Ligand Systems and Supramolecular Building Blocks. ChemistrySelect 2018. [DOI: 10.1002/slct.201801320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ritambhara Jangir
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai-400 076 India
| | | | - Ramaswamy Murugavel
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai-400 076 India
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13
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Ziółkowska A, Szynkiewicz N, Wiśniewska A, Pikies J, Ponikiewski Ł. Reactions of (Ph)tBuP-P(SiMe 3)Li·3THF with [(PNP)TiCl 2] and [ MeNacNacTiCl 2·THF]: synthesis of first PNP titanium(iv) complex with the phosphanylphosphinidene ligand [(PNP)Ti(Cl){η 2-P-P(Ph)tBu}]. Dalton Trans 2018; 47:9733-9741. [PMID: 29987299 DOI: 10.1039/c8dt01833b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Herein, the lithium derivative of diphosphane, (Ph)tBuP-P(SiMe3)Li (1), is isolated for the first time and investigated in reactions with β-diketiminate (MeNacnac- = [Ar]NC(Me)CHC(Me)N[Ar]; Ar = 2,6-iPr2C6H3) and PNP-pincer (PNP = N[2-PiPr2-4-methylphenyl]2) Ti(iii) complexes. The β-diketiminate titanium(iii) complex containing the phosphanylphosphido ligand [MeNacNacTi(Cl){η2-P(SiMe3)-P(Ph)tBu}] (2) is prepared via the reaction of [MeNacNacTiCl2·THF] with (Ph)tBuP-P(SiMe3)Li in toluene solution with good yield and purity. The corresponding titanium(iv) complex involving the phosphanylphosphinidene ligand [MeNacNacTi(Cl){η2-P-P(Ph)tBu}] (3) is synthesized via the oxidation of complex (2) with [iBu3PAgCl]4. Interestingly, an analogous PNP titanium(iv) complex, [(PNP)Ti(Cl){η2-P-P(Ph)tBu}] (4), is obtained in the reaction of [(PNP)TiCl2] with (Ph)tBuP-P(SiMe3)Li in toluene solution and a 1 : 1 molar ratio instead of the expected titanium(iii) complex with the phosphanylphosphido ligand. The solid-state structures of (Ph)tBuP-P(SiMe3)Li·3THF (1), [MeNacNacTi(Cl){η2-P(SiMe3)-P(Ph)tBu}] (2), [MeNacNacTi(Cl){η2-P-P(Ph)tBu}] (3) and [(PNP)Ti(Cl){η2-P-P(Ph)tBu}] (4) are determined by single-crystal X-ray diffraction, which reveals that in all obtained complexes, both the phosphanylphosphinidene (Ph)tBuP-P and phosphanylphosphido (Ph)tBuP-P(SiMe3) ligands are bidentate-coordinated to the metal center.
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Affiliation(s)
- Aleksandra Ziółkowska
- Gdansk University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Gabriela Narutowicza Str. 11/12, 80-233 Gdansk, Poland.
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Zauliczny M, Ordyszewska A, Pikies J, Grubba R. Bonding in Phosphanylphosphinidene Complexes of Transition Metals and their Correlation with Structures,
31
P NMR Spectra, and Reactivities. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800270] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mateusz Zauliczny
- Department of Inorganic Chemistry Chemical Faculty Gdansk University of Technology 11/12 Gabriela Narutowicza Str. 80‐233 Gdansk Poland
| | - Anna Ordyszewska
- Department of Inorganic Chemistry Chemical Faculty Gdansk University of Technology 11/12 Gabriela Narutowicza Str. 80‐233 Gdansk Poland
| | - Jerzy Pikies
- Department of Inorganic Chemistry Chemical Faculty Gdansk University of Technology 11/12 Gabriela Narutowicza Str. 80‐233 Gdansk Poland
| | - Rafał Grubba
- Department of Inorganic Chemistry Chemical Faculty Gdansk University of Technology 11/12 Gabriela Narutowicza Str. 80‐233 Gdansk Poland
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15
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Szynkiewicz N, Ponikiewski Ł, Grubba R. Symmetrical and unsymmetrical diphosphanes with diversified alkyl, aryl, and amino substituents. Dalton Trans 2018; 47:16885-16894. [DOI: 10.1039/c8dt03775b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Synthesis, classification, and analysis of the structural, electronic and spectroscopic properties of a series of novel diphosphanes with diversified substituents.
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Affiliation(s)
- Natalia Szynkiewicz
- Department of Inorganic Chemistry
- Faculty of Chemistry
- Gdańsk University of Technology
- Gdansk
- Poland
| | - Łukasz Ponikiewski
- Department of Inorganic Chemistry
- Faculty of Chemistry
- Gdańsk University of Technology
- Gdansk
- Poland
| | - Rafał Grubba
- Department of Inorganic Chemistry
- Faculty of Chemistry
- Gdańsk University of Technology
- Gdansk
- Poland
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Sattler E, Szilvási T, Matern E, Bombicz P, Gamer M, Okrut A, Kovács I. Investigations of LiP(SiMe
2
CH
2
SiMe
3
)–P
t
Bu
2
, the Surprising Byproduct in the Metalation of (Me
3
Si)
2
P–P
t
Bu
2. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201701077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ewald Sattler
- Institut für Anorganische Chemie Karlsruher Institut für Technologie Engesserstr. 15, Geb. 30.45 76131 Karlsruhe Germany
| | - Tibor Szilvási
- Department of Chemical and Biological Engineering University of Wisconsin‐Madison 1415 Engineering Drive 53706‐1607 Madison Wisconsin USA
| | - Eberhard Matern
- Institut für Anorganische Chemie Karlsruher Institut für Technologie Engesserstr. 15, Geb. 30.45 76131 Karlsruhe Germany
| | - Petra Bombicz
- Research Center for Natural Sciences Hungarian Academy of Sciences P. O. Box 17 1521 Budapest Hungary
| | - Michael Gamer
- Institut für Anorganische Chemie Karlsruher Institut für Technologie Engesserstr. 15, Geb. 30.45 76131 Karlsruhe Germany
| | - Alexander Okrut
- Department of Chemical and Biomolecular Engineering University of California Berkeley 94720 Berkeley CA USA
| | - Ilona Kovács
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Szt. Gellért tér 4 1521 Budapest Hungary
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Ponikiewski Ł, Ziółkowska A, Zauliczny M, Pikies J. Reactions of lithiated diphosphanes R 2 P-P(SiMe 3 )Li· n THF (R = t Bu, i Pr) with [(PNP)TiCl 2 ]. Two different coordination types of phosphanylphosphido ligand to the metal center. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.08.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Grubba R, Kaniewska K, Ponikiewski Ł, Cristóvão B, Ferenc W, Dragulescu-Andrasi A, Krzystek J, Stoian SA, Pikies J. Synthetic, Structural, and Spectroscopic Characterization of a Novel Family of High-Spin Iron(II) [(β-Diketiminate)(phosphanylphosphido)] Complexes. Inorg Chem 2017; 56:11030-11042. [PMID: 28841309 DOI: 10.1021/acs.inorgchem.7b01374] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This work describes a series of iron(II) phosphanylphosphido complexes. These compounds were obtained by reacting lithiated diphosphanes R2PP(SiMe3)Li (R = t-Bu, i-Pr) with an iron(II) β-diketiminate complex, [LFe(μ2-Cl)2Li(DME)2] (1), where DME = 1,2-dimethoxyethane and L = Dippnacnac (β-diketiminate). While the reaction of 1 with t-Bu2PP(SiMe3)Li yields [LFe(η1-Me3SiPP-t-Bu2)] (2), that of 1 with equimolar amounts of i-Pr2PP(SiMe3)Li, in DME, leads to [LFe(η2-i-Pr2PPSiMe3)] (3). In contrast, the reaction of 1 with (i-Pr2N)2PP(SiMe3)Li provides not an iron-containing complex but 1-[(diisopropylamino)phosphine]-2,4-bis(diisopropylamino)-3-(trimethylsilyl)tetraphosphetane (4). The structures of 2-4 were determined using diffractometry. Thus, 2 exhibits a three-coordinate iron site and 3 a four-coordinate iron site. The increase in the coordination number is induced by the change from an anticlinal to a synclinal conformation of the phoshpanylphosphido ligands. The electronic structures of 2 and 3 were assessed through a combined field-dependent 57Fe Mössbauer and high-frequency and -field electron paramagnetic resonance spectroscopic investigation in conjunction with analysis of their magnetic susceptibility and magnetization data. These studies revealed two high-spin iron(II) sites with S = 2 ground states that have different properties. While 2 exhibits a zero-field splitting described by a positive D parameter (D = +17.4 cm-1; E/D = 0.11) for 3, this parameter is negative [D = -25(5) cm-1; E/D = 0.15(5)]. Density functional theory (DFT) and time-dependent DFT (TDDFT) calculations provide insights into the origin of these differences and allow us to rationalize the fine and hyperfine structure parameters of 2 and 3. Thus, for 2, the spin-orbit coupling mixes a z2-type ground state with two low-lying {xz/yz} orbital states. These interactions lead to an easy plane of magnetization, which is essentially parallel to the plane defined by the N-Fe-N atoms. For 3, we find a yz-type ground state that is strongly mixed with a low-lying z2-type orbital state. In this case, the spin-orbit interaction leads to a partial unquenching of the orbital momentum along the x axis, that is, to an easy axis of magnetization oriented roughly along the Fe-P bond of the phosphido moiety.
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Affiliation(s)
- Rafał Grubba
- Department of Inorganic Chemistry, Chemical Faculty, Gdańsk University of Technology , G. Narutowicza St. 11/12, Gdańsk PL-80-233, Poland
| | - Kinga Kaniewska
- Department of Inorganic Chemistry, Chemical Faculty, Gdańsk University of Technology , G. Narutowicza St. 11/12, Gdańsk PL-80-233, Poland
| | - Łukasz Ponikiewski
- Department of Inorganic Chemistry, Chemical Faculty, Gdańsk University of Technology , G. Narutowicza St. 11/12, Gdańsk PL-80-233, Poland
| | - Beata Cristóvão
- Department of General and Coordination Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University , Maria Curie-Skłodowska Sq. 2, Lublin PL-20-031, Poland
| | - Wiesława Ferenc
- Department of General and Coordination Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University , Maria Curie-Skłodowska Sq. 2, Lublin PL-20-031, Poland
| | - Alina Dragulescu-Andrasi
- Department of Chemistry and Biochemistry, Florida State University , Tallahassee, Florida 32306, United States
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
| | - Sebastian A Stoian
- Department of Chemistry and Biochemistry, Florida State University , Tallahassee, Florida 32306, United States.,National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States.,Department of Chemistry, University of Idaho , Moscow, Idaho 83844, United States
| | - Jerzy Pikies
- Department of Inorganic Chemistry, Chemical Faculty, Gdańsk University of Technology , G. Narutowicza St. 11/12, Gdańsk PL-80-233, Poland
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