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Lamola JL, Adeyinka AS, Malan FP, Moshapo PT, Holzapfel CW, Maumela MC. Exploring steric and electronic parameters of biaryl phosphacycles. NEW J CHEM 2022. [DOI: 10.1039/d1nj05769c] [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
Steric and electronic parameters of the newly developed biaryl phosphacycles derived from the phobane[3.3.1] (Phob) and phosphatrioxa-adamantane (Cg) moieties were quantified from various experimental and theoretical methods.
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Affiliation(s)
- Jairus L. Lamola
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Kingsway Campus, Auckland Park 2006, South Africa
| | - Adedapo S. Adeyinka
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Kingsway Campus, Auckland Park 2006, South Africa
| | - Frederick P. Malan
- Department of Chemistry, University of Pretoria, Hatfield Campus, Hartfield 0002, South Africa
| | - Paseka T. Moshapo
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Kingsway Campus, Auckland Park 2006, South Africa
| | - Cedric W. Holzapfel
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Kingsway Campus, Auckland Park 2006, South Africa
| | - Munaka Christopher Maumela
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Kingsway Campus, Auckland Park 2006, South Africa
- Research and Technology, Sasol, 1 Klasie Havenga Rd, Sasolburg 1947, South Africa
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Lamola JL, Moshapo PT, Holzapfel CW, Christopher Maumela M. Palladium-catalyzed borylation of aryl bromides and chlorides using phosphatrioxa-adamantane ligands. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2021.153572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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The bis(Biphenyl)phosphorus Fragment in Trivalent and Tetravalent P-Environments. INORGANICS 2021. [DOI: 10.3390/inorganics9110082] [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
Diaryl substituted phosphorus (III) compounds are commonly used motifs in synthesis. Although the basic synthetic routes to these molecules starting from PCl3 are well reported, sterically hindered aryl substituents can be difficult to introduce, especially if the P atom is in ortho position to another group. This work explores the chemistry of the bis(biphenyl)phosphorus(III) fragment. As third substituents, H, M, Cl, NR2, two group 14 element substituents and also Li were introduced in high-yielding processes offering a wide chemical variety of the bis(biphenyl) phosphine motif. In addition, also a tetravalent phosphine borane adduct was isolated. All structures were thoroughly investigated by heteronuclear NMR spectroscopic analysis. Furthermore, the reaction conditions are discussed in connection with the structures and four crystal structures of the aminophosphine, phosphine, phosphine borane and phosphide are provided. The latter crystallized as a dimer with a unique planar P2Li2 ring, which is stabilized by the non-covalent C⋯Li interaction arising from the biphenyl motif and represents a rare example of a donor-free planar P2Li2 ring.
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