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Platts JA, Kariuki BM, Newman PD. Welcoming Neighbour or Inhospitable Host? Selective Second Metal Binding in 5- and 6-Phospha-Substituted Bpy Ligands. Molecules 2024; 29:1150. [PMID: 38474663 DOI: 10.3390/molecules29051150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
The controlled formation of mixed-metal bimetallics was realised through use of a fac-[Re(CO)3(N,N'-bpy-P)Cl] complex bearing an exogenous 2,4,6-trioxa-1,3,5,7-tetramethyl-8-phosphaadamantane donor at the 5-position of the bpy. The introduction of gold, silver, and rhodium with appropriate secondary ligands was readily achieved from established starting materials. Restricted rotation about the C(bpy)-P bond was observed in several of the bimetallic complexes and correlated with the relative steric bulk of the second metal moiety. Related chemistry with the 6-substituted derivative proved more limited in scope with only the bimetallic Re/Au complex being isolated.
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Affiliation(s)
- James A Platts
- School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
| | | | - Paul D Newman
- School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
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2
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Shuttleworth TA, Miles-Hobbs AM, Pringle PG, Sparkes HA. 2-Pyridyl substituents enhance the activity of palladium-phospha-adamantane catalysts for the methoxycarbonylation of phenylacetylene. Dalton Trans 2018; 46:125-137. [PMID: 27922644 DOI: 10.1039/c6dt03983a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a series of CgPAr ligands is reported, where CgP is the 6-phospha-2,4,8-trioxa-1,3,5,7-tetramethyladamant-6-yl moiety and Ar = 2-pyridyl (L2), 3-pyridyl (L3), 2-pyrimidyl (L4), 4-R-2-pyridyl [R = Me (L5a), CF3 (L6a), SiMe3 (L7a)] or 6-R-2-pyridyl [R = Me (L5b), CF3 (L6b), SiMe3 (L7b). Testing of these ligands in the Pd-catalysed methoxycarbonylation of phenylacetylene reveals that the activity and branched selectivity of the catalysts derived from these ligands varies as a function of the N-heterocycle, with the catalyst derived from L5b being the most active of those tested. This, together with the poor performance of catalysts derived from L3 supports the hypothesis that the catalysis proceeds by a "proton shuttling" mechanism, an idea that previously had only been applied to arylphosphines. Reaction of [PtCl2(cod)] with L where L = L2 or L4-7 yields a rac/meso mixture of the trans-[PtCl2(L)2] (1a-h) complexes, three of which are structurally characterised. 31P NMR spectroscopy shows that reaction of L3 with [PtCl2(cod)] gives a mixture of mononuclear and binuclear metal complexes in solution. The complex trans-[PdCl2(L2)2] (4) reacts with AgBF4 to give the [PdCl(κ1-L2)(κ2-L2)]BF4 (5) with spectroscopic and structural characterisation confirming the presence of a P,N-chelate. 1H and 31P NMR evidence supports the assignment of a pyridyl-protonated species being formed upon treatment of 4 with TsOH·H2O in CD2Cl2; both the protonated species and chelate 5 are observed when the reaction is carried out in MeOH.
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Affiliation(s)
| | | | - Paul G Pringle
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Hazel A Sparkes
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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3
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Nell BP, Tyler DR. Synthesis, reactivity, and coordination chemistry of secondary phosphines. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.07.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Lister JM, Carreira M, Haddow MF, Hamilton A, McMullin CL, Orpen AG, Pringle PG, Stennett TE. Unexpectedly High Barriers to M–P Rotation in Tertiary Phobane Complexes: PhobPR Behavior That Is Commensurate with tBu2PR. Organometallics 2014. [DOI: 10.1021/om400980e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Julia M. Lister
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Monica Carreira
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Mairi F. Haddow
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Alex Hamilton
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Claire L. McMullin
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - A. Guy Orpen
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Paul G. Pringle
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Tom E. Stennett
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
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5
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Hopewell JP, McMullin CL, Pringle PG, Shuttleworth TA, Woodall CH. Correlations of the Structural Properties of a Complete R
2
PX Series (X = Hydrogen or Halogen). Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301483] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jonathan P. Hopewell
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK, http://www.bris.ac.uk/chemistry/people/paul‐g‐pringle/ overview.html
| | - Claire L. McMullin
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK, http://www.bris.ac.uk/chemistry/people/paul‐g‐pringle/ overview.html
| | - Paul G. Pringle
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK, http://www.bris.ac.uk/chemistry/people/paul‐g‐pringle/ overview.html
| | - Timothy A. Shuttleworth
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK, http://www.bris.ac.uk/chemistry/people/paul‐g‐pringle/ overview.html
| | - Christopher H. Woodall
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK, http://www.bris.ac.uk/chemistry/people/paul‐g‐pringle/ overview.html
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6
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Gridnev ID. Recent Experimental and Computational Studies of the Mechanisms of Enantioselection in Asymmetric Catalytic Reactions. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.1250] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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7
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Gridnev ID, Liu Y, Imamoto T. Mechanism of Asymmetric Hydrogenation of β-Dehydroamino Acids Catalyzed by Rhodium Complexes: Large-Scale Experimental and Computational Study. ACS Catal 2013. [DOI: 10.1021/cs400767e] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ilya D. Gridnev
- Graduate
School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
- Department
of Chemistry, Graduate School of Science, Tohoku University, 6-3
Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Yuanyuan Liu
- Department
of Chemistry, Graduate School of Science, Tohoku University, 6-3
Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Tsuneo Imamoto
- Department
of Chemistry, Graduate School of Science, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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8
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Fanjul T, Eastham G, Floure J, Forrest SJK, Haddow MF, Hamilton A, Pringle PG, Orpen AG, Waugh M. Interplay of bite angle and cone angle effects. A comparison between o-C6H4(CH2PR2)(PR′2) and o-C6H4(CH2PR2)(CH2PR′2) as ligands for Pd-catalysed ethene hydromethoxycarbonylation. Dalton Trans 2013; 42:100-15. [DOI: 10.1039/c2dt31913f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Fanjul T, Eastham G, Haddow MF, Hamilton A, Pringle PG, Orpen AG, Turner TPW, Waugh M. Efficient and chemoselective ethene hydromethoxycarbonylation catalysts based on Pd-complexes of heterodiphosphines o-C6H4(CH2PtBu2)(CH2PR2). Catal Sci Technol 2012. [DOI: 10.1039/c1cy00409c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gridnev ID, Alberico E, Gladiali S. Captured at last: a catalyst–substrate adduct and a Rh-dihydride solvate in the asymmetric hydrogenation by a Rh-monophosphine catalyst. Chem Commun (Camb) 2012; 48:2186-8. [DOI: 10.1039/c2cc17335b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Fey N, Garland M, Hopewell JP, McMullin CL, Mastroianni S, Orpen AG, Pringle PG. Stable fluorophosphines: predicted and realized ligands for catalysis. Angew Chem Int Ed Engl 2011; 51:118-22. [PMID: 22076744 DOI: 10.1002/anie.201105954] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Indexed: 11/06/2022]
Affiliation(s)
- Natalie Fey
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
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Fey N, Garland M, Hopewell JP, McMullin CL, Mastroianni S, Orpen AG, Pringle PG. Stable Fluorophosphines: Predicted and Realized Ligands for Catalysis. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105954] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Alberico E, Baumann W, de Vries JG, Drexler HJ, Gladiali S, Heller D, Henderickx HJW, Lefort L. Unravelling the Reaction Path of Rhodium-MonoPhos-Catalysed Olefin Hydrogenation. Chemistry 2011; 17:12683-95. [DOI: 10.1002/chem.201101793] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Indexed: 11/10/2022]
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14
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Carboni S, Gennari C, Pignataro L, Piarulli U. Supramolecular ligand–ligand and ligand–substrate interactions for highly selective transition metal catalysis. Dalton Trans 2011; 40:4355-73. [DOI: 10.1039/c0dt01517b] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Dodds DL, Floure J, Garland M, Haddow MF, Leonard TR, McMullin CL, Orpen AG, Pringle PG. Diphosphanes derived from phobane and phosphatrioxa-adamantane: similarities, differences and anomalies. Dalton Trans 2011; 40:7137-46. [DOI: 10.1039/c1dt10335k] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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