2
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Bould J, Tok O, Passarelli V, Londesborough MGS, Macías R. Ligand Lability Driven by Metal-to-Borane Pseudorotation: A Mechanism for Ligand Exchange. Inorg Chem 2020; 59:17958-17969. [PMID: 33275421 DOI: 10.1021/acs.inorgchem.0c02205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The discovery of systems that interact with small molecules plays a vital facilitating role in the development of devices that show sensitivity to their surroundings and an ability to quickly relay chemical and physical information. Herein, we report on the reaction of [NiCl2(dppe)] with decaborane that produces in usable yield a new 11-vertex nickelaborane, [7,7-(dppe)-nido-7-NiB10H12] (1), which shows interesting reactivity and functionality toward carbon monoxide and ethylisonitrile. This contribution describes the synthesis and full structural characterization of 1 and its small-molecule EtNC and CO adducts, 2 and 3, and delineates the dynamic molecular behavior of all of these species in solution. This information sets a foundation from which more advanced work on this and related metallaborane systems can be conceived and provides a more general reference to how NMR spectroscopy, combined with DFT calculations, can be used to analyze the precise locomotion of labile ligands around a metal center held within a borane cluster.
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Affiliation(s)
- Jonathan Bould
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-Řež 250 68, Czech Republic.,Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, University of Zaragoza 12, 50009 Zaragoza, Spain
| | - Oleg Tok
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-Řež 250 68, Czech Republic
| | - Vincenzo Passarelli
- Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, University of Zaragoza 12, 50009 Zaragoza, Spain
| | - Michael G S Londesborough
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-Řež 250 68, Czech Republic
| | - Ramón Macías
- Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, University of Zaragoza 12, 50009 Zaragoza, Spain
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3
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Bould J, Passarelli V, Oro LA, Macías R. Reversible Small-Molecule Interactions with Coordinatively Unsaturated Metal Centers Held in Metallathiaborane Clusters. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700539] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jonathan Bould
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza-CSIC; C/Pedro Cerbuna 12 ES-50009 Zaragoza Spain
| | - Vincenzo Passarelli
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza-CSIC; C/Pedro Cerbuna 12 ES-50009 Zaragoza Spain
- Centro Universitario de la Defensa; Ctra. Huesca s/n ES-50090 Zaragoza Spain
| | - Luis A. Oro
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza-CSIC; C/Pedro Cerbuna 12 ES-50009 Zaragoza Spain
| | - Ramón Macías
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza-CSIC; C/Pedro Cerbuna 12 ES-50009 Zaragoza Spain
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4
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Luaces S, Passarelli V, Artigas MJ, Lahoz FJ, Oro LA, Macías R. Postsynthetic modifications of [2,2,2-(H)(PPh3)2-closo-2,1-RhSB8H8] with Lewis bases: cluster modular tuning. Dalton Trans 2016; 45:8622-36. [PMID: 27142590 DOI: 10.1039/c6dt00856a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
It has been demonstrated that the reaction of [2,2,2-(H)(PPh3)2-closo-2,1-RhSB8H8] () with PPh3 affords the boron substituted rhodathiaborane-PPh3 adduct, [6,6-(PPh3)2-9-(PPh3)-arachno-6,5-RhSB8H9] (). Building upon this reaction, we report herein that the 10-vertex hydridorhodathiaborane reacts with the Lewis bases, PCy3, py, 2-Mepy, 2-Etpy, 3-Mepy and 4-Mepy to form the rhodathiaborane-ligand adducts, [6,6-(PPh3)2-9-(L)-arachno-6,5-RhSB8H9], where L = PCy3 (), 2-Mepy (), 2-Etpy (), py (), 3-Mepy () or 4-Mepy (), and [8,9-μ-(H)-9-(PPh3)2-8-(L)-arachno-9,6-RhSB8H8], where L = py (), 3-Mepy () or 4-Mepy (). The selectivity of the reactions depended on the nature of the entering Lewis bases, affording the 6,5-isomers, , , and as single products for PPh3, PCy3, 2-Mepy and 2-Etpy; and mixtures of the 6,5-/9,6-regioisomers, /, / and / for py, 3-Mepy and 4-Mepy, respectively. The molecular structures of both regioisomers were characterized by X-ray diffraction analysis for the 6,5-isomers, and , and for the 9,6-isomers, and . Variable temperature NMR studies of the reaction between and PPh3 or 2-Mepy demonstrated that at low temperatures there is formation of the 9,6-species that subsequently isomerizes to the 6,5-regioisomer, indicating that for the more sterically hindered Lewis bases, PPh3, 2-Mepy and PCy3, the latter isomer is more stable and accessible through an intramolecular {Rh(PPh3)2} vertex flip. The formation of both isomers with py, 3-Mepy and 4-Mepy indicates that the kinetic and thermodynamic energies of the 6,5 and 9,6 rhodathiaborane-ligand adducts are similar for these Lewis bases. Lewis base bonding to exo-polyhedral boron vertices results in a change of the metal coordination from pseudo-octahedral Rh(iii) in to pseudo-square planar Rh(i) in the adducts. The chemistry described here highlights the remarkable structural flexibility of these polyhedral boron-containing compounds, their modular architecture and their easy postsynthetic modification.
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Affiliation(s)
- Susana Luaces
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Vincenzo Passarelli
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain. and Centro Universitario de la Defensa, Ctra. Huesca s/n, ES-50090 Zaragoza, Spain
| | - María José Artigas
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Fernando J Lahoz
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Luis A Oro
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
| | - Ramón Macías
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, C/Pedro Cerbuna 12, ES-50009 Zaragoza, Spain.
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5
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Mateo AC, Calvo B, Macías R, Artigas MJ, Lahoz FJ, Oro LA. [1,1-(η(2)-dppe)-3-(NC5H5)-closo-1,2-RhSB9H8]: conformational lability and reactivity with H2 upon protonation. Dalton Trans 2015; 44:9004-13. [PMID: 25882490 DOI: 10.1039/c5dt00288e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metallaheteroboranes are versatile compounds that can be conveniently modified and eventually tailored by ligand modification at either the metal centre or the boron vertices. Recently, we have discovered that protonation of some rhodathiaboranes affords cationic clusters with interesting reaction chemistry. In order to tune the reactivity of some of these polyhedral boron-based compounds, we have prepared air-stable orange [1,1-(η(2)-dppe)-3-(NC5H5)-closo-1,2-RhSB9H8] (2) by the treatment of the known hydridorhodathiaborane [8,8,8-(H)(PPh3)2-9-(NC5H5)-nido-8,7-RhSB9H9] (1) with dppe. The new 11-vertex rhodathiaborane, 2, reacts readily with triflic acid (TfOH) in CH2Cl2 to give orange cationic [8,8-(η(2)-dppe)-9-(NC5H5)-nido-8,7-RhSB9H9](+) (3). VT NMR experiments have allowed the characterization of a structural closo ↔ nido tautomerism, which involves hapticity changes in the ligation of the {SB9H9-(NC5H5)} moiety to the {Rh(dppe)} fragment, with the proton moving between the Rh(1)-B(3) and the B(9)-B(10) edges of the closo- and nido-isomers, respectively. The proton enhances the stereochemical non-rigidity and Lewis acidity of 3 versus the neutral 2. This modification of the chemical and structural basis permits the efficient heterolytic splitting of the H-H bond, leading to the formation of new hydridorhodathiaborane isomers [8,8,8-(H)(η(2)-dppe)-μ-8,9-(H)-9-(NC5H5)-nido-8,7-RhSB9H10](+) ()4 that are in equilibrium with the reactants, H2 and 3.
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Affiliation(s)
- Ana C Mateo
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009-Zaragoza, Spain.
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6
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Calvo B, Keß M, Macias R, Sancho R, Lahoz F, Oro L. 3-Pyridylacetonitrile-ligated 11-vertex rhodathiaboranes: synthesis, characterization, and X-ray crystal structure. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.959004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- B. Calvo
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza – CSIC, Zaragoza, Spain
| | - M. Keß
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza – CSIC, Zaragoza, Spain
| | - R. Macias
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza – CSIC, Zaragoza, Spain
| | - R. Sancho
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza – CSIC, Zaragoza, Spain
| | - F.J. Lahoz
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza – CSIC, Zaragoza, Spain
| | - L.A. Oro
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza – CSIC, Zaragoza, Spain
- Center of Research Excellence in Refining & Petrochemicals, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia
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7
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Álvarez Á, Calvo B, Macı́as R, Lahoz FJ, Oro LA. Hydridorhodathiaboranes: Synthesis, Characterization, and Reactivity. Organometallics 2014. [DOI: 10.1021/om500374g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Álvaro Álvarez
- Instituto de Sı́ntesis
Quı́mica
y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009-Zaragoza, Spain
| | - Beatriz Calvo
- Instituto de Sı́ntesis
Quı́mica
y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009-Zaragoza, Spain
| | - Ramón Macı́as
- Instituto de Sı́ntesis
Quı́mica
y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009-Zaragoza, Spain
| | - Fernando J. Lahoz
- Instituto de Sı́ntesis
Quı́mica
y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009-Zaragoza, Spain
| | - Luis A. Oro
- Instituto de Sı́ntesis
Quı́mica
y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas, 50009-Zaragoza, Spain
- Center of Research
Excellence in Petroleum
Refining and Petrochemicals, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia
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8
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Calvo B, Macías R, Artigas MJ, Lahoz FJ, Oro LA. Unusual cationic rhodathiaboranes: synthesis and characterization of [8,8,8-(H)(PR3)2-9-(Py)-nido-8,7-RhSB9H10]+and [1,3-μ-(H)-1,1-(PR3)2-3-(Py)-isonido-1,2-RhSB9H8]+. Dalton Trans 2014; 43:5121-33. [DOI: 10.1039/c3dt52018h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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