1
|
Nelsen MJ, Girolami GS. Zirconium alkyls with ancillary cyclooctatetraenyl ligands. X-ray crystal structures of [Li(tmed)][(C8H8)Zr(p-C6H4Me)Cl2] and (C8H8)Zr[CH(SiMe3)2]2. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
2
|
Abernethy RJ, Foreman MRSJ, Hill AF, Smith MK, Willis AC. Relative hemilabilities of H2B(az)2 (az = pyrazolyl, dimethylpyrazolyl, methimazolyl) chelates in the complexes [M(η-C3H5)(CO)2{H2B(az)2}] (M = Mo, W). Dalton Trans 2020; 49:781-796. [DOI: 10.1039/c9dt03744f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The question of B–H–Mo hemilability in a range of dihydrobis(azolyl)borate scorpionate ligands is discussed with reference to η3-allyl complexes [Mo(η3-C3H5)(CO)2{H2B(az)2}] [az = pyrazolyl (pz), dimethylpyrazolyl (pz*), mercaptoimidazolyl (mt)].
Collapse
Affiliation(s)
- Robyn J. Abernethy
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Mark R. St.-J. Foreman
- Nuclear Chemistry and Industrial Materials Recycling
- Chalmers University of Technology
- Göteborg
- Sweden
| | - Anthony F. Hill
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Matthew K. Smith
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Anthony C. Willis
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| |
Collapse
|
3
|
Rong Y, Sambade D, Parkin G. Molecular structures of tris(1-tert-butyl-2-mercaptoimidazolyl)hydroborate complexes of titanium, zirconium and hafnium. Acta Crystallogr C Struct Chem 2016; 72:806-812. [PMID: 27811416 DOI: 10.1107/s2053229616008925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 06/02/2016] [Indexed: 11/10/2022] Open
Abstract
Cyclopentadienyl and tris(pyrazolyl)hydroborate have found much use as supporting ligands in the chemistry of titanium, zirconium and hafnium, especially with respect to applications involving olefin polymerization catalysis. In contrast, closely related tris(1-alkyl-2-mercaptoimidazolyl)hydroborate, [TmR], ligands have so far found little application to the chemistry of these elements, despite the fact that such ligands are currently used extensively in coordination chemistry. In view of the fact that a substituent in the 2-position exerts a direct influence on the steric environment of the metal center, we report here the application of the sterically demanding tris(1-tert-butyl-2-mercaptoimidazolyl)hydroborate [Tmt-Bu] ligand to these metals. Dichlorido(η5-cyclopentadienyl)[tris(1-tert-butyl-2-sulfanylidene-2,3-dihydro-1H-imidazol-3-yl)borato-κ3S,S',H]zirconium(IV) benzene hemisolvate, [Zr(C21H34BN6S3)(C5H5)Cl2]·0.5C6H6, (I), dichlorido(η5-cyclopentadienyl)[tris(1-tert-butyl-2-sulfanylidene-2,3-dihydro-1H-imidazol-3-yl)borato-κ3S,S',H]titanium(IV) benzene hemisolvate, [Ti(C21H34BN6S3)(C5H5)Cl2]·0.5C6H6, (II), [bis(1-tert-butyl-2-sulfanylidene-2,3-dihydro-1H-imidazol-3-yl)borato-κ3S,S',H]dichlorido(η5-cyclopentadienyl)zirconium(IV), [Zr(C14H24BN4S2)(C5H5)Cl2], (III), (1-tert-butyl-2,3-dihydro-1H-imidazole-2-thione-κS)(1-tert-butyl-2-sulfanylidene-1H-imidazol-3-ido-κ2N3,S)dichlorido(η5-cyclopentadienyl)zirconium(IV) benzene monosolvate, [Zr(C7H11N2S)(C7H12N2S)(C5H5)Cl2]·C6H6, (IV), and tribenzyl[tris(1-tert-butyl-2-sulfanylidene-2,3-dihydro-1H-imidazol-3-yl)borato-κ3S,S',S'']hafnium(IV) benzene tetrasolvate, [Hf(C7H7)3(C21H34BN6S3)]·4C6H6, (V), have been structurally characterized by X-ray diffraction. The [Tmt-Bu] ligand coordinates to Ti and Zr in Cp[κ3S2,H-Tmt-Bu]MCl2 [M = Zr, (I), and Ti, (II)] in a κ3S2,H mode, while the benzyl compounds [Tmt-Bu]M(CH2Ph)3 [M = Zr and Hf, (V)] exhibit κ3S3 coordination.
Collapse
Affiliation(s)
- Yi Rong
- Department of Chemistry, Columbia University, New York 10027, USA
| | - David Sambade
- Department of Chemistry, Columbia University, New York 10027, USA
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York 10027, USA
| |
Collapse
|
4
|
Roy DK, De A, Panda S, Varghese B, Ghosh S. Chemistry of N,S-Heterocyclic Carbene and Metallaboratrane Complexes: A New η3-BCC-Borataallyl Complex. Chemistry 2015; 21:13732-8. [DOI: 10.1002/chem.201501014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Indexed: 11/08/2022]
|
5
|
Kreider-Mueller A, Rong Y, Owen JS, Parkin G. Molecular structures of tris(2-mercapto-1-tert-butylimidazolyl)hydroborato and tris(2-mercapto-1-adamantylimidazolyl)hydroborato sodium complexes: analysis of [Tm(R)] ligand coordination modes and conformations. Dalton Trans 2014; 43:10852-65. [PMID: 24898480 DOI: 10.1039/c4dt01271b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tris(mercaptoimidazolyl)hydroborato complexes, [κ(3)-S2H-Tm(Bu(t))]Na(THF)3 and [κ(3)-S2H-Tm(Ad)]Na(THF)3, which feature t-butyl and adamantyl substituents, have been synthesized via the reactions of the respective 1-R-1,3-dihydro-2H-imidazole-2-thiones with NaBH4 in THF (R = Bu(t), 1-Ad). X-ray diffraction studies indicate that the compounds are monomeric and that the [Tm(R)] ligands coordinate to the metal in a κ(3)-S2H manner via two of the sulfur donors and the hydrogen attached to boron, a combination that is unprecedented for sodium derivatives. Analysis of the tris(mercaptoimidazolyl)hydroborato compounds that are listed in the Cambridge Structural Database has allowed for the formulation of a set of criteria that enables κ(x)-S(x) and κ(x+1)-S(x)H coordination modes to be identified. Furthermore, the various κ(x)-S(x) and κ(x+1)-S(x)H coordination modes have also been analyzed with respect to the conformations of the [Tm(R)] ligands, which differ by rotation of the imidazolethione moieties about the B-N bond.
Collapse
Affiliation(s)
- Ava Kreider-Mueller
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
| | | | | | | |
Collapse
|
6
|
Bellows SM, Cundari TR, Holland PL. Spin Crossover during β-Hydride Elimination in High-Spin Iron(II)– and Cobalt(II)–Alkyl Complexes. Organometallics 2013. [DOI: 10.1021/om400325x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Sarina M. Bellows
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Thomas R. Cundari
- Department of Chemistry and CaSCAM, University of North Texas, Denton, Texas 76203, United States
| | - Patrick L. Holland
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| |
Collapse
|
7
|
Al-Harbi A, Rong Y, Parkin G. Synthesis and structural characterization of bis and tris(2-mercapto-1-methylbenzimidazolyl)hydroborato complexes: benzannulation promotes κ³-coordination. Dalton Trans 2013; 42:11117-27. [PMID: 23801309 DOI: 10.1039/c3dt51092a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The benzannulated bis and tris(mercaptoimidazolyl)borohydride compounds, [BmMeBenz]Na and [TmMeBenz]Na, have been synthesized via the reactions of NaBH4 with two and three equivalents of 1-methyl-1,3-dihydro-2H-benzimidazole-2-thione, respectively. X-ray diffraction studies on the THF adducts, {μ-[BmMeBenz]Na(THF)₂}₂ and {[TmMeBenz]Na}₂(μ-THF)₃, indicate that both compounds are dinuclear but differ according to the nature of the bridging ligand. Specifically, {μ-[BmMeBenz]Na(THF)₂}₂ possesses bridging [BmMeBenz] ligands and terminal THF ligands, while {[TmMeBenz]Na}₂(μ-THF)₃ possesses terminal [TmMeBenz] ligands and bridging THF ligands. The tris(mercaptoimidazolyl)borohydride ligand of {[TmMeBenz]Na}₂(μ-THF)₃ coordinates in a κ³-manner, which is in marked contrast to the κ²-, κ¹- and κ⁰-modes that have been reported for various [TmMe]Na derivatives. Density functional theory (DFT) geometry optimization calculations of the anions [TmMeBenz]⁻ and [TmMe]⁻ in the gas phase indicate that the conformation required for κ³-S₃ coordination, i.e. one in which the three sulfur donors point away from the B-H group, is relatively more stable for [TmMeBenz]⁻ than for [TmMe]⁻, and thus provides a rationalization for the observation that benzannulation enables κ³-coordination of tris(mercaptoimidazolyl)borohydride ligand in {[TmMeBenz]Na}₂(μ-THF)₃. Furthermore, comparison of the molecular structure and IR spectroscopic properties of [TmMeBenz]Re(CO)₃ with those of [TmMe]Re(CO)₃ indicates that benzannulation reduces the electron donating properties of the ligand, but has little effect on its steric properties. {μ-[BmMeBenz]Na(THF)₂}₂ and {[TmMeBenz]Na}₂(μ-THF)₃ react with [Me₃PCuCl]₄ to give [BmMeBenz]CuPMe₃ and [TmMeBenz]CuPMe₃, the first pair of structurally related bis and tris(mercaptoimidazolyl)hydroborato copper(I) compounds.
Collapse
Affiliation(s)
- Ahmed Al-Harbi
- Department of Chemistry, Columbia University, New York, NY 10027, USA
| | | | | |
Collapse
|
8
|
|
9
|
Affiliation(s)
- Anthony F. Hill
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
| | - Horst Neumann
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
| | - Jörg Wagler
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, D-09596 Freiberg, Germany
| |
Collapse
|
10
|
Yurkerwich K, Coleman F, Parkin G. Bis(2-mercapto-1-R-imidazolyl)hydroborato complexes of aluminium, gallium, indium and thallium: compounds possessing gallium–gallium bonds and a trivalent thallium alkyl. Dalton Trans 2010; 39:6939-42. [DOI: 10.1039/c0dt00461h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
11
|
Crossley IR, Hill AF, Willis AC. Metallaboratranes: Bis- and Tris(methimazolyl)borane Complexes of Group 9 Metal Carbonyls and Thiocarbonyls. Organometallics 2009. [DOI: 10.1021/om900655k] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian R. Crossley
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, Australian Capital Territory, Australia
- Department of Chemistry, University of Sussex, Brighton, United Kingdom
| | - Anthony F. Hill
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, Australian Capital Territory, Australia
| |
Collapse
|
12
|
Affiliation(s)
- Mark D. Spicer
- WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK, Fax: +44‐141‐548‐4822
| | - John Reglinski
- WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK, Fax: +44‐141‐548‐4822
| |
Collapse
|
13
|
Abernethy RJ, Hill AF, Tshabang N, Willis AC, Young RD. On the Nature of “RuCl(dmso)2{HB(mt)3}” (mt = methimazolyl). Organometallics 2008. [DOI: 10.1021/om8007426] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robyn J. Abernethy
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia
| | - Anthony F. Hill
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia
| | - Never Tshabang
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia
| | - Rowan D. Young
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia
| |
Collapse
|
14
|
Hill AF, Smith MK, Wagler J. Near Linear Ta−H−B Geometry: [TaCl2(η-C5Me5){κ3-H,S,S′-H2B(methimazolyl)2}]. Organometallics 2008. [DOI: 10.1021/om7008099] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anthony F. Hill
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia, and Institut für Anorganizche Chemie, Technische Universität Bergakademie, Freiberg, Germany
| | - Matthew K. Smith
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia, and Institut für Anorganizche Chemie, Technische Universität Bergakademie, Freiberg, Germany
| | - Jörg Wagler
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, ACT, Australia, and Institut für Anorganizche Chemie, Technische Universität Bergakademie, Freiberg, Germany
| |
Collapse
|
15
|
Majumder S, Odom AL. Simple and convenient one-pot synthesis of cyclooctatetraene. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.01.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
16
|
Crossley IR, Hill AF. Unlocking the metallaboratrane cage: reversible B–H activation in platinaboratranes. Dalton Trans 2008:201-3. [DOI: 10.1039/b712058c] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|