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Lortie JL, Davies M, Boyle PD, Karttunen M, Ragogna PJ. Chemoselective Staudinger Reactivity of Bis(azido)phosphines Supported with a π-Donating Imidazolin-2-iminato Ligand. Inorg Chem 2024; 63:6335-6345. [PMID: 38516707 DOI: 10.1021/acs.inorgchem.4c00120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Synthesis and characterization of new P(III) and P(V) bis(azido)phosphines/phosphoranes supported by an N,N'-bis(2,6-diisopropylphenyl) imidazolin-2-iminato (IPrN) ligand and their reactivity with various secondary and tertiary phosphines result in the formation of chiral and/or asymmetric mono(phosphinimino)azidophosphines via the Staudinger reaction. The reaction of IPrNP(N3)2 (2) or IPrNP(S)(N3)2 (4S) with an excess of tertiary phosphine resulted in the chemoselective formation of IPrNP(N3)(NPMe3) (7) or IPrNP(S)N3(NPR3) (5R), respectively. The chemoselective Staudinger reactivity was also observed in reactions using a secondary phosphine (HPCy2) to produce IPrNP(S)N3[NP(H)Cy2] (6a), which exists in equilibrium with a tautomeric IPrNP(S)N3[N(H)PCy2] form (6b), as confirmed by 31P-31P nuclear Overhauser effect spectroscopy (NOESY). Density functional theory (DFT) calculations point to a combination of energetically unfavorable lowest unoccupied molecular orbitals (LUMOs) and the accumulation of increasing negative charge at the terminal azido-nitrogen upon a single azide-to-phosphinimine conversion that gave rise to the observed chemoselectivity.
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Affiliation(s)
- John L Lortie
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Matthew Davies
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Paul D Boyle
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Mikko Karttunen
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
- Department of Physics and Astronomy, The University of Western Ontario, London, Ontario N6A 3K7, Canada
| | - Paul J Ragogna
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
- Surface Science Western, London, Ontario N6G 0J3, Canada
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Lu B, Zeng X. Phosphinidenes: Fundamental Properties and Reactivity. Chemistry 2023:e202303283. [PMID: 38108540 DOI: 10.1002/chem.202303283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/12/2023] [Accepted: 12/18/2023] [Indexed: 12/19/2023]
Abstract
Phosphinidenes are heavy congeners of nitrenes that have been broadly used as in situ reagents in synthetic phosphorus chemistry and also serve as versatile ligands in coordination with transition metals. However, the detection of free phosphinidenes is largely challenged by their high reactivity and also the lack of suitable synthetic methods, rendering the knowledge about the fundamental properties of this class of low-valent phosphorus compounds limited. Recently, an increasing number of free phosphinidenes bearing prototype structural and bonding properties have been prepared for the first time, thus enabling the exploration of their distinct reactivity from the nitrene analogues. This Concept article will discuss the experimental approaches for the generation of the highly unstable phosphinidenes and highlight their distinct reactivity from the nitrogen analogues so as to stimuate future studies about their potential applications in phosphorus chemistry.
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Affiliation(s)
- Bo Lu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, China
| | - Xiaoqing Zeng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, China
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Hu D, Lu B, Song C, Zhu B, Wang L, Bernhardt E, Zeng X. Synthesis and characterization of phosphorous(III) diisocyanate and triisocyanate. Dalton Trans 2021; 50:3299-3307. [PMID: 33595037 DOI: 10.1039/d1dt00261a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two phosphorous(iii) isocyanates, ClP(NCO)2 and P(NCO)3 were isolated as neat substances and characterized with IR (gas-phase and Ne-matrix), Raman (solid), and 31P NMR spectroscopy. Their vibrational spectra were analyzed in terms of a single conformer with the aid of quantum chemical computations at the B3LYP/6-311+G(3df) level of theory. In line with the theoretically computed favorable syn-configuration of the NCO ligands with the sterically active lone-pair electrons on the central phosphorous atom (nP), low-temperature single-crystal X-ray diffraction (XRD) of solid ClP(NCO)2 reveals a Cs symmetric syn-configuration for both NCO ligands with weak CO (r = 2.9692(4) Å) van der Waals (vdW) interactions. In the binary isocyante P(NCO)3, all the three NCO ligands adopt similar syn-configuration with nP, leading to a propeller-shaped structure with slightly distorted C3v symmetry due to steric repulsion of the NCO ligands and the PO vdW interactions (r = 3.1901(1) Å) in the solid state.
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Affiliation(s)
- Dandan Hu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Bo Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Chao Song
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Bifeng Zhu
- Department of Chemistry, Fudan University, Shanghai, 200433, China.
| | - Lina Wang
- Department of Chemistry, Fudan University, Shanghai, 200433, China.
| | - Eduard Bernhardt
- FB C-Anorganische Chemie, Bergische Universität Wuppertal, Gaussstrasse 20, Wuppertal, 42119, Germany
| | - Xiaoqing Zeng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China and Department of Chemistry, Fudan University, Shanghai, 200433, China.
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Synthesis and characterizations of fluorophosphoryl diazide and diisocyanate. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2020.109694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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