1
|
Moreno JJ, Espada MF, Maya C, Campos J, López-Serrano J, Macgregor SA, Carmona E. Isomerization of a cationic (η5-C5Me5)Ir(III) complex involving remote C–C and C–H bond formation. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
2
|
Lee BYT, Phillips AD, Hanif M, Tong KKH, Söhnel T, Hartinger CG. Heptadentate, Octadentate, Or Even Nonadentate? Denticity in the Unexpected Formation of an All-Carbon Donor-Atom Ligand in Rh III(Cp*)(Anthracenyl-NHC) Complexes. Inorg Chem 2021; 60:8734-8741. [PMID: 34100283 DOI: 10.1021/acs.inorgchem.1c00711] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Investigations on incorporating an N-flanking anthracenyl moiety to [Rh(Cp*)(NHC)Cl2] complexes surprisingly led to the formation of an intramolecular C-C bond between the Cp* and anthracenyl moieties, with additional auxiliary interactions between the metal and the anthracenyl ring system. In silico modeling supports a reaction mechanism whereby Rh(η4-tetramethylfulvene) intermediates undergo metallocycloaddition and the abstraction of a chlorido ligand, affording unique cationic complexes that feature Rh centers coordinated by a nonadentate ligand with exclusively carbon donor atoms. Some Rh-C interactions were extremely weak but nevertheless exhibited covalent bonding character. These weak Rh-C interactions were readily displaced by stronger electron donors, and the nonadentate ligand reverted to the heptadentate coordination mode observed in the intermediate. As far as we are aware, this study provides the first conclusive evidence of complexes bearing a single nonadentate κ9-coordinating ligand that features only carbon donors bound to a metal center.
Collapse
Affiliation(s)
- Betty Y T Lee
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Andrew D Phillips
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Muhammad Hanif
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Kelvin K H Tong
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Tilo Söhnel
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Christian G Hartinger
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| |
Collapse
|
3
|
Alférez MG, Moreno JJ, Hidalgo N, Campos J. Reversible Hydride Migration from C 5Me 5 to Rh I Revealed by a Cooperative Bimetallic Approach. Angew Chem Int Ed Engl 2020; 59:20863-20867. [PMID: 33448577 PMCID: PMC7754342 DOI: 10.1002/anie.202008442] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/16/2020] [Indexed: 02/06/2023]
Abstract
The use of cyclopentadienyl ligands in organometallic chemistry and catalysis is ubiquitous, mostly due to their robust spectator role. Nonetheless, increasing examples of non-innocent behaviour are being documented. Here, we provide evidence for reversible intramolecular C-H activation at one methyl terminus of C5Me5 in [(η-C5Me5)Rh(PMe3)2] to form a new Rh-H bond, a process so far restricted to early transition metals. Experimental evidence was acquired from bimetallic rhodium/gold structures in which the gold center binds either to the rhodium atom or to the activated Cp* ring. Reversibility of the C-H activation event regenerates the RhI and AuI monometallic precursors, whose cooperative reactivity towards polar E-H bonds (E=O, N), including the N-H bonds in ammonia, can be understood in terms of bimetallic frustration.
Collapse
Affiliation(s)
- Macarena G. Alférez
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| | - Juan J. Moreno
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| | - Nereida Hidalgo
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| |
Collapse
|
4
|
Alférez MG, Moreno JJ, Hidalgo N, Campos J. Reversible Hydride Migration from C
5
Me
5
to Rh
I
Revealed by a Cooperative Bimetallic Approach. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Macarena G. Alférez
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC) University of Sevilla Avenida Américo Vespucio 49 41092 Sevilla Spain
| | - Juan J. Moreno
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC) University of Sevilla Avenida Américo Vespucio 49 41092 Sevilla Spain
| | - Nereida Hidalgo
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC) University of Sevilla Avenida Américo Vespucio 49 41092 Sevilla Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC) University of Sevilla Avenida Américo Vespucio 49 41092 Sevilla Spain
| |
Collapse
|
5
|
Moreno JJ, Espada MF, Campos J, López-Serrano J, Macgregor SA, Carmona E. Base-Promoted, Remote C-H Activation at a Cationic (η 5-C 5Me 5)Ir(III) Center Involving Reversible C-C Bond Formation of Bound C 5Me 5. J Am Chem Soc 2019; 141:2205-2210. [PMID: 30682245 PMCID: PMC6396953 DOI: 10.1021/jacs.8b11752] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
C–H
bond activation at cationic [(η5-C5Me5)Ir(PMe2Ar′)] centers is described,
where PMe2Ar′ are the terphenyl phosphine ligands
PMe2ArXyl2 and PMe2ArDipp2. Different pathways are defined for the conversion
of the five-coordinate complexes [(η5-C5Me5)IrCl(PMe2Ar′)]+, 2(Xyl)+ and 2(Dipp)+, into
the corresponding pseudoallyls 3(Xyl)+ and 3(Dipp)+. In the absence of an external Brønsted
base, electrophilic, remote ζ C–H activation takes place,
for which the participation of dicationic species, [(η5-C5Me5)Ir(PMe2Ar′)]2+, is proposed. When NEt3 is present, the PMe2ArDipp2 system is shown to proceed via 4(Dipp)+ as an intermediate en route to the thermodynamic,
isomeric product 3(Dipp)+. This complex interconversion
involves a non-innocent C5Me5 ligand, which
participates in C–H and C–C bond formation and cleavage.
Remarkably, the conversion of 4(Dipp)+ to 3(Dipp)+ also proceeds in the solid state.
Collapse
Affiliation(s)
- Juan J Moreno
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Sevilla and Consejo Superior de Investigaciones Científicas (CSIC) , Avenida Américo Vespucio 49 , 41092 Sevilla , Spain
| | - María F Espada
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Sevilla and Consejo Superior de Investigaciones Científicas (CSIC) , Avenida Américo Vespucio 49 , 41092 Sevilla , Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Sevilla and Consejo Superior de Investigaciones Científicas (CSIC) , Avenida Américo Vespucio 49 , 41092 Sevilla , Spain
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Sevilla and Consejo Superior de Investigaciones Científicas (CSIC) , Avenida Américo Vespucio 49 , 41092 Sevilla , Spain
| | - Stuart A Macgregor
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh EH14 4AS , United Kingdom
| | - Ernesto Carmona
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh EH14 4AS , United Kingdom
| |
Collapse
|
6
|
Synthesis, characterization and reactivity of dinuclear rhenium complexes containing hemilabile phosphines as ligands: X-ray structures of diax-[Re2(CO)8{κ1(P)-Ph2P(CH2)2CN}2], [Re2(CO)8{μ:κ3(P,C,C)-iPr2NP(CH2CHCH2)2}] and diax-[Re2(CO)8(PPh3){κ1(P)-p-MeOC6H4P(CH2CHCH2)2}]. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2015.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
7
|
García JM, Coll DS, Ocando-Mavárez E, Ascanio J, Pekerar S, Atencio R, Gonzalez T, Briceño A, Avila E, Rosales M. Chemistry of transition-metal complexes containing functionalized phosphines. Part 2. Cationic rhodium(I) complexes stabilized by hemilabile diallylphosphines. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.02.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
8
|
Segarra C, Mas-Marzá E, Benítez M, Mata JA, Peris E. Unconventional Reactivity of Imidazolylidene Pyridylidene Ligands in Iridium(III) and Rhodium(III) Complexes. Angew Chem Int Ed Engl 2012; 51:10841-5. [DOI: 10.1002/anie.201206175] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 08/16/2012] [Indexed: 11/06/2022]
|
9
|
Segarra C, Mas-Marzá E, Benítez M, Mata JA, Peris E. Unconventional Reactivity of Imidazolylidene Pyridylidene Ligands in Iridium(III) and Rhodium(III) Complexes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206175] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
10
|
Chen S, Pullarkat SA, Li Y, Leung PH. Synthesis of Homo- and Hetero-Bimetallic Arsenic Complexes by Means of Regioselective Monoinsertion of Alkynylarsane into the Pd-C Bond of a Palladacycle. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100208] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
11
|
Janssen (née Kirleis) K, Butenschön H. New cyclopentadienylethylphosphane chelate complexes with unsymmetrical phosphane substitution. NEW J CHEM 2011. [DOI: 10.1039/c1nj20292h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
12
|
|