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Hammond M, Vaccaro DA, Parkin G. Synthesis and structural characterization of thallium and cadmium carbatrane compounds, [ TismPriBenz]Tl and [ TismPriBenz]CdMe. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sattler W, Shlian DG, Sambade D, Parkin G. Synthesis and structural characterization of bis(2-pyridylthio)(p-tolylthio)methyl zinc complexes and the catalytic hydrosilylation of CO2. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114542] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Xi ZH, Sun Y, Wang X, Zhao XL, Han J, Chen XD. Rare earth metal complexes based on a tripodal ligand and their application as highly selective “turn-on” fluorescent probe for Fe3+ ion. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ruccolo S, Rauch M, Parkin G. Synthesis and Structural Characterization of Tris(isopropylbenzimidazol-2-ylthio)methyl Zinc Complexes, [TitmPriBenz]ZnX: Modulation of Transannular Zn–C Interactions. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00158] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Serge Ruccolo
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Michael Rauch
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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Al-Harbi A, Hammond MJ, Parkin G. Organometallic Zirconium Compounds in an Oxygen-Rich Coordination Environment: Synthesis and Structural Characterization of Tris(oxoimidazolyl)hydroboratozirconium Compounds. Inorg Chem 2018; 57:1426-1437. [PMID: 29314851 DOI: 10.1021/acs.inorgchem.7b02832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of tris(oxoimidazolyl)hydroborato ligands, which serve as L2X [O3] donors, have been employed to obtain organometallic zirconium compounds in an uncommon oxygen-rich coordination environment. For example, Cp[ToMeBenz]ZrCl2 has been synthesized via the reaction of [ToMeBenz]Na with CpZrCl3 and bears a structural resemblance to the bent metallocene dichloride derivative Cp2ZrCl2. In addition, the half-sandwich counterparts [ToMeBenz]ZrCl3 and [ToBut]ZrCl3 have been obtained by metathesis of ZrCl4 with [ToMeBenz]Na and [ToBut]Na, respectively. The structurally related zirconium benzyl compounds [ToRBenz]Zr(CH2Ph)3 (R = Me, But, 1-Ad) have also been synthesized via the reactions of [ToRBenz]Tl with Zr(CH2Ph)4, and X-ray diffraction studies demonstrate that the benzyl ligands in these compounds are conformationally flexible and exhibit a large range of Zr-CH2-Ph bond angles (94.7-131.7°). Protolytic cleavage of one of the benzyl ligands of [ToRBenz]Zr(CH2Ph)3 (R = But, 1-Ad) may be achieved by treatment with [PhNHMe2][B(C6F5)4] to generate {[ToRBenz]Zr(CH2Ph)2}[B(C6F5)4], which are catalysts for the polymerization of ethylene. The molecular structure of the ether adduct, {[ToButBenz]Zr(CH2Ph)2(OEt2)}[B(C6F5)4], has been determined by X-ray diffraction. In addition to the use of tris(oxoimidazolyl)hydroborato ligands, bis(oxoimidazolyl)hydroborato ligands have also been used to obtain zirconium benzyl compounds in oxygen-rich environments, namely, [BoMeBenz]2Zr(CH2Ph)2 and [BoAdBenz]2Zr(CH2Ph)2.
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Affiliation(s)
- Ahmed Al-Harbi
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Matthew J Hammond
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University , New York, New York 10027, United States
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Al-Harbi A, Kriegel B, Gulati S, Hammond MJ, Parkin G. Bis- and Tris(2-oxobenzimidazolyl)hydroborato Complexes of Sodium and Thallium: New Classes of Bidentate and Tridentate Oxygen Donor Ligands. Inorg Chem 2017; 56:15271-15284. [PMID: 29210574 DOI: 10.1021/acs.inorgchem.7b02638] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of bis- and tris(oxobenzimidazolyl)hydroborato compounds, namely, [BoRBenz]Na and [ToRBenz]-Na (R = Me, But, Ad), which feature uncommon sterically demanding LX [O2] and L2X [O3] donor ligands, have been obtained via the reactions of NaBH4 with 1-R-1,3-dihydro-2H-benzimidazol-2-ones. Evidence that the alkyl substituents are suitably located to have a significant impact on the coordination environment is provided by the observation that the methyl derivative [ToMeBenz]Na(κ3-diglyme) exhibits κ3-coordination of the diglyme, whereas the t-butyl and adamantyl derivatives, [ToButBenz]Na(κ2-diglyme) and [ToAdBenz]Na(κ2-diglyme), exhibit κ2-coordination. The [BoRBenz] and [ToRBenz] ligands also allow for isolation of discrete mononuclear thallium compounds, [BoRBenz]Tl and [ToRBenz]Tl, for which the steric demands of the ligands have been quantified in terms of both cone angle and buried volume concepts.
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Affiliation(s)
- Ahmed Al-Harbi
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Benjamin Kriegel
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Shivani Gulati
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Matthew J Hammond
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University , New York, New York 10027, United States
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Tüchler M, Holler S, Huber E, Fischer S, Boese AD, Belaj F, Mösch-Zanetti NC. Synthesis and Characterization of a Thiopyridazinylmethane-Based Scorpionate Ligand: Formation of Zinc Complexes and Rearrangement Reaction. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00568] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Michael Tüchler
- Institute
of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse
1, 8010 Graz, Austria
| | - Stefan Holler
- Institute
of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse
1, 8010 Graz, Austria
| | - Elke Huber
- Institute
of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse
1, 8010 Graz, Austria
| | - Susanne Fischer
- Institute
of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse
1, 8010 Graz, Austria
- Institute
of Chemistry, Physical and Theoretical Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - A. Daniel Boese
- Institute
of Chemistry, Physical and Theoretical Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institute
of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse
1, 8010 Graz, Austria
| | - Nadia C. Mösch-Zanetti
- Institute
of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse
1, 8010 Graz, Austria
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Ruccolo S, Rauch M, Parkin G. Tris[(1-isopropylbenzimidazol-2-yl)dimethylsilyl]methyl metal complexes, [Tism PriBenz]M: a new class of metallacarbatranes, isomerization to a tris(N-heterocyclic carbene) derivative, and evidence for an inverted ligand field. Chem Sci 2017; 8:4465-4474. [PMID: 30155219 PMCID: PMC6100236 DOI: 10.1039/c7sc00499k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 03/27/2017] [Indexed: 11/22/2022] Open
Abstract
The tris[(1-isopropylbenzimidazol-2-yl)dimethylsilyl]methyl ligand, [TismPriBenz], has been employed to form carbatrane compounds of both the main group metals and transition metals, namely [TismPriBenz]Li, [TismPriBenz]MgMe, [TismPriBenz]Cu and [TismPriBenz]NiBr. In addition to the formation of atranes, a zinc compound that exhibits κ3-coordination, namely [κ3-TismPriBenz]ZnMe, has also been obtained. Furthermore, the [TismPriBenz] ligand may undergo a thermally induced rearrangement to afford a novel tripodal tris(N-heterocyclic carbene) variant, as shown by the conversion of [TismPriBenz]Cu to [κ4-C4-TismPriBenz*]Cu. The transannular M-C bond lengths in the atrane compounds are 0.19-0.32 Å longer than the sum of the respective covalent radii, which is consistent with a bonding description that features a formally zwitterionic component. Interestingly, computational studies demonstrate that the Cu-Catrane interactions in [TismPriBenz]Cu and [κ4-C4-TismPriBenz*]Cu are characterized by an "inverted ligand field", in which the occupied antibonding orbitals are localized more on carbon than on copper.
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Affiliation(s)
- Serge Ruccolo
- Department of Chemistry , Columbia University , New York 10027 , USA .
| | - Michael Rauch
- Department of Chemistry , Columbia University , New York 10027 , USA .
| | - Gerard Parkin
- Department of Chemistry , Columbia University , New York 10027 , USA .
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Li H, Aquino AJA, Cordes DB, Hase WL, Krempner C. Electronic nature of zwitterionic alkali metal methanides, silanides and germanides - a combined experimental and computational approach. Chem Sci 2017; 8:1316-1328. [PMID: 28451273 PMCID: PMC5360169 DOI: 10.1039/c6sc02390h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/06/2016] [Indexed: 11/24/2022] Open
Abstract
Zwitterionic group 14 complexes of the alkali metals of formula [C(SiMe2OCH2CH2OMe)3M], (M-1), [Si(SiMe2OCH2CH2OMe)3M], (M-2), [Ge(SiMe2OCH2CH2OMe)3M], (M-3), where M = Li, Na or K, have been prepared, structurally characterized and their electronic nature was investigated by computational methods. Zwitterions M-2 and M-3 were synthesized via reactions of [Si(SiMe2OCH2CH2OMe)4] (2) and [Ge(SiMe2OCH2CH2OMe)4] (3) with MOBu t (M = Li, Na or K), resp., in almost quantitative yields, while M-1 were prepared from deprotonation of [HC(SiMe2OCH2CH2OMe)3] (1) with LiBu t , NaCH2Ph and KCH2Ph, resp. X-ray crystallographic studies and DFT calculations in the gas-phase, including calculations of the NPA charges confirm the zwitterionic nature of these compounds, with the alkali metal cations being rigidly locked and charge separated from the anion by the internal OCH2CH2OMe donor groups. Natural bond orbital (NBO) analysis and the second order perturbation theory analysis of the NBOs reveal significant hyperconjugative interactions in M-1-M-3, primarily between the lone pair and the antibonding Si-O orbitals, the extent of which decreases in the order M-1 > M-2 > M-3. The experimental basicities and the calculated gas-phase basicities of M-1-M-3 reveal the zwitterionic alkali metal methanides M-1 to be significantly stronger bases than the analogous silanides M-2 and germanium M-3.
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Affiliation(s)
- H Li
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - A J A Aquino
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - D B Cordes
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - W L Hase
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - C Krempner
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
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Chakrabarti N, Ruccolo S, Parkin G. Cadmium Compounds with an [N 3C] Atrane Motif: Evidence for the Generation of a Cadmium Hydride Species. Inorg Chem 2016; 55:12105-12109. [PMID: 27934411 PMCID: PMC5142449 DOI: 10.1021/acs.inorgchem.6b02196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Indexed: 01/31/2023]
Abstract
Tris(2-pyridylthio)methane ([Tptm]H) has been employed to synthesize a series of cadmium carbatrane compounds that feature an [N3C] coordination environment. Specifically, [Tptm]H reacts with Cd[N(SiMe3)2]2 to afford [Tptm]CdN(SiMe3)2, which thereby provides access to other derivatives. For example, [Tptm]CdN(SiMe3)2 reacts with (i) CO2 to form {[Tptm]Cd(μ-NCO)}2 and (ii) Me3SiOH and Ph3SiOH to form {[κ3-Tptm]Cd(μ-OSiMe3)}2 and [Tptm]CdOSiPh3, respectively. The siloxide compound {[κ3-Tptm]Cd(μ-OSiMe3)}2 reacts with Me3SiX (X = Cl, Br, O2CMe) to give [Tptm]CdX, while the reaction with PhSiH3 in the presence of CO2 generates the formate complex, [Tptm]CdO2CH, thereby providing evidence for the generation of a proposed cadmium hydride intermediate, {[Tptm]CdH}.
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Affiliation(s)
- Neena Chakrabarti
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Serge Ruccolo
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Gerard Parkin
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
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Ruccolo S, Sattler W, Rong Y, Parkin G. Modulation of Zn–C Bond Lengths Induced by Ligand Architecture in Zinc Carbatrane Compounds. J Am Chem Soc 2016; 138:14542-14545. [DOI: 10.1021/jacs.6b09250] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Serge Ruccolo
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Wesley Sattler
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Yi Rong
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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Rong Y, Palmer JH, Parkin G. Benzannulated tris(2-mercapto-1-imidazolyl)hydroborato ligands: tetradentate κ4-S3H binding and access to monomeric monovalent thallium in an [S3] coordination environment. Dalton Trans 2014; 43:1397-407. [PMID: 24201311 PMCID: PMC3912732 DOI: 10.1039/c3dt52418c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The benzannulated tris(mercaptoimidazolyl)borohydride sodium complex, [Tm(Bu(t)Benz)]Na, has been synthesized via the reaction of NaBH4 with 1-tert-butyl-1,3-dihydro-2H-benzimidazole-2-thione, while [Tm(MeBenz)]K has been synthesized via the reaction of KBH4 with 1-methyl-1,3-dihydro-2H-benzimidazole-2-thione. The molecular structures of the solvated adducts, {[Tm(Bu(t)Benz)]Na(THF)}2(μ-THF)2 and [Tm(MeBenz)]K(OCMe2)3, have been determined by X-ray diffraction, which demonstrates that the [Tm(R)] ligands in these complexes adopt different coordination modes to that in {[Tm(MeBenz)]Na}2(μ-THF)3. Specifically, while the [Tm(MeBenz)] ligand of the sodium complex {[Tm(MeBenz)]Na}2(μ-THF)3 adopts a κ(3)-S3 coordination mode, the potassium complex [Tm(MeBenz)]K(OCMe2)3 adopts a most uncommon inverted κ(4)-S3H coordination mode in which the potassium binds to all three sulfur donors and the hydrogen of the B-H group in a linear KH-B manner. Furthermore, the [Tm(Bu(t)Benz)] ligand of {[Tm(Bu(t)Benz)]Na(THF)}2(μ-THF)2 adopts a κ(3)-S2H coordination mode, thereby demonstrating the flexibility of this ligand system. The monovalent thallium compounds, [Tm(MeBenz)]Tl and [Tm(Bu(t)Benz)]Tl, have been obtained via the corresponding reactions of [Tm(MeBenz)]Na and [Tm(Bu(t)Benz)]Na with TlOAc. X-ray diffraction demonstrates that the three sulfur donors of the [Tm(RBenz)] ligands of both [Tm(MeBenz)]Tl and [Tm(Bu(t)Benz)]Tl chelate to thallium. This coordination mode is in marked contrast to that in other [Tm(R)]Tl compounds, which exist as dinuclear molecules wherein two of the sulfur donors coordinate to different thallium centers. As such, this observation provides further evidence that benzannulation promotes κ(3)-S3 coordination in this system.
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Affiliation(s)
- Yi Rong
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
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