1
|
Krämer F, Radius M, Berberich H, Fernández I, Breher F. A neutral, acyclic, borataalkene-like ligand for group 11 metals: L- and Z-type ligands side by side. Chem Commun (Camb) 2022; 58:3905-3908. [PMID: 35237782 DOI: 10.1039/d2cc00199c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The overall neutral α-borylated phosphorus ylide Ph3PC(Me)BEt2 behaves like a polar borataalkene and can act as acyclic, ambiphilic π-type ligand with L- and Z-type functionalities side by side. In the complexes [MX{η2-Ph3PC(Me)BEt2}] (M = Cu, (Ag), Au; X = Cl, NTf2), the bonding is dominated by the highly nucleophilic ylidic carbon atom (L-type ligand). The Lewis acidic boron atom furnishes nonetheless a small but significant bonding contribution (Z-type ligand).
Collapse
Affiliation(s)
- Felix Krämer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, Karlsruhe 76131, Germany.
| | - Michael Radius
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, Karlsruhe 76131, Germany.
| | - Helga Berberich
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, Karlsruhe 76131, Germany.
| | - Israel Fernández
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad Complutense de Madrid, Madrid 28040, Spain.
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, Karlsruhe 76131, Germany.
| |
Collapse
|
2
|
Neugebauer M, Schmitz S, Brünink D, Doltsinis NL, Klein A. Dynamics of the efficient cyclometalation of the undercoordinated organoplatinum complex [Pt(COD)(neoPh)] + (neoPh = 2-methyl-2-phenylpropyl). NEW J CHEM 2020. [DOI: 10.1039/d0nj04811a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The cyclometalation reaction of [Pt(COD)(κ1-neoPh)]+ (neoPh = 2-methyl-2-phenylpropyl) to [Pt(COD)(κ2-neoPh)] was studied experimentally and mechanistically using DFT and MD simulations.
Collapse
Affiliation(s)
- Michael Neugebauer
- University of Cologne
- Department of Chemistry
- Institute for Inorganic Chemistry
- D-50939 Cologne
- Germany
| | - Simon Schmitz
- University of Cologne
- Department of Chemistry
- Institute for Inorganic Chemistry
- D-50939 Cologne
- Germany
| | - Dana Brünink
- Westfälische Wilhelms-Universität Münster
- Institut für Festkörpertheorie and Center for Multiscale Theory and Computation
- 48149 Münster
- Germany
| | - Nikos L. Doltsinis
- Westfälische Wilhelms-Universität Münster
- Institut für Festkörpertheorie and Center for Multiscale Theory and Computation
- 48149 Münster
- Germany
| | - Axel Klein
- University of Cologne
- Department of Chemistry
- Institute for Inorganic Chemistry
- D-50939 Cologne
- Germany
| |
Collapse
|
3
|
Drover MW, Bowes EG, Dufour MC, Lesperance-Nantau LA. Platinum complexes of a boron-rich diphosphine ligand. Dalton Trans 2020; 49:16312-16318. [DOI: 10.1039/d0dt00963f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we describe the preparation, characterization, and reactivity of two PtII bis-hydrocarbyl complexes containing the 1,2-bis(di(3-dicyclohexylboraneyl)propylphosphino)ethane (P2BCy4) ligand.
Collapse
Affiliation(s)
- Marcus W. Drover
- Department of Chemistry and Biochemistry
- The University of Windsor
- Windsor
- Canada
| | - Eric G. Bowes
- Chemistry Division
- Los Alamos National Laboratory
- Los Alamos
- USA
| | - Maeve C. Dufour
- Department of Chemistry and Biochemistry
- The University of Windsor
- Windsor
- Canada
| | | |
Collapse
|
4
|
Ordyszewska A, Szynkiewicz N, Perzanowski E, Chojnacki J, Wiśniewska A, Grubba R. Structural and spectroscopic analysis of a new family of monomeric diphosphinoboranes. Dalton Trans 2019; 48:12482-12495. [PMID: 31361287 DOI: 10.1039/c9dt02195g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a series of amino- and aryl(diphosphino)boranes R2PB(R'')PR'2, where R2P, R'2P = tBu2P, tBuPhP, Ph2P, Cy2P, and R'' = iPr2N, Ph, which were obtained via the metathesis reaction of iPr2NBBr2 or PhBBr2 with selected lithium phosphides. The structures of isolated diphosphinoboranes were characterized in the solid state and in solution by means of X-ray diffraction and NMR spectroscopy, respectively. The utility of these P-B-P species as ligands for transition metal complexes was tested in the reaction with [(COD)PtMe2]. Moreover, we carried out DFT calculations to elucidate bonding interactions and philicity of the reactive centers as well as to analyze conformations of the studied species. Electronic and steric properties of substituents on P and B atoms were found to have a strong influence on the structures of the obtained compounds. Three main types of diphosphinoboranes were distinguished, based on the strength of P-B π-interaction within the molecule: (i) application of strong electron-donating substituents on P-atoms and electron-accepting phenyl groups on B atoms led to the structure with one double P[double bond, length as m-dash]B and one single P-B bond and diverse planar and pyramidal geometry of phosphanyl groups; (ii) reduction of the donor ability of phosphanyl groups gave diphosphanylboranes with delocalized P-B-P π-interactions; (iii) introduction of amino groups with strong donor abilities on B atoms canceled P-B π-interactions and allowed compounds with two very long P-B bonds and two pyramidal phosphanyl groups to be obtained.
Collapse
Affiliation(s)
- Anna Ordyszewska
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza St. 11/12, PL-80-233, Gdansk, Poland.
| | - Natalia Szynkiewicz
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza St. 11/12, PL-80-233, Gdansk, Poland.
| | - Emil Perzanowski
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza St. 11/12, PL-80-233, Gdansk, Poland.
| | - Jarosław Chojnacki
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza St. 11/12, PL-80-233, Gdansk, Poland.
| | - Aleksandra Wiśniewska
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza St. 11/12, PL-80-233, Gdansk, Poland.
| | - Rafał Grubba
- Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza St. 11/12, PL-80-233, Gdansk, Poland.
| |
Collapse
|
5
|
Neugebauer M, Schmitz S, Krause M, L. Doltsinis N, Klein A. Reactions of the organoplatinum complex [Pt(cod) (neoSi)Cl] (neoSi = trimethylsilylmethyl) with the non-coordinating anions SbF6– and BPh4–. OPEN CHEM 2018. [DOI: 10.1515/chem-2018-0130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractReactions of the organoplatinum complex [Pt(cod)(neoSi)Cl] (neoSi = (trimethylsilylmethyl) with the Ag(I) salts of oxo or fluoride containing anions A– = NO3–, ClO4–, OTf – (trifluoromethanesulfonate) and SbF6– lead to the desired abstraction of the chlorido ligand and precipitation of AgCl. However, further reaction of the resulting Pt complexes [Pt(cod)(neoSi) (solvent)]+ with diverse N-heterocyclic ligands L such as pyridines, caffeine, and guanine did not yield the targeted complexes [Pt(cod)(neoSi)(L)](A) in most of the cases, but to extensive decomposition yielding [Pt(cod)(Me) (solvent)]+, thus transforming the neoSi into a methyl ligand. A detailed study on the reaction with SbF6– combining DFT calculations with NMR and MS revealed that Pt catalysed decomposition of SbF6‒ and fluorination of the neoSi silicon atom leading to FSiMe3. When reacting the parent complex with Ag(BPh4), the arylated derivative [Pt(cod)(neoSi)(Ph)] was obtained and characterised by multinuclear NMR, MS and single crystal XRD.
Collapse
Affiliation(s)
- Michael Neugebauer
- Universität zu Köln, Department für Chemie, Institut für Anorganische Chemie Greinstraße 6, D-50939Köln, Germany
| | - Simon Schmitz
- Universität zu Köln, Department für Chemie, Institut für Anorganische Chemie Greinstraße 6, D-50939Köln, Germany
| | - Maren Krause
- Universität zu Köln, Department für Chemie, Institut für Anorganische Chemie Greinstraße 6, D-50939Köln, Germany
| | - Nikos L. Doltsinis
- Westfälische Wilhelms-Universität Münster, Institut für Festkörpertheorie and Center for Multiscale Theory and Computation, Wilhelm-Klemm-Straße 10, 48149Münster, Germany
| | - Axel Klein
- Universität zu Köln, Department für Chemie, Institut für Anorganische Chemie Greinstraße 6, D-50939Köln, Germany
| |
Collapse
|