1
|
Metal-rich metallaboranes: Clusters containing triply and tetra bridging borylene and boride units. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213796] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
2
|
Prakash R, Pradhan AN, Jash M, Kahlal S, Cordier M, Roisnel T, Halet JF, Ghosh S. Diborane(6) and Its Analogues Stabilized by Mono-, Bi-, and Trinuclear Group 7 Templates: Combined Experimental and Theoretical Studies. Inorg Chem 2020; 59:1917-1927. [PMID: 31934757 DOI: 10.1021/acs.inorgchem.9b03217] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Irradiation of [Re2(CO)10] in the presence of BH3·thf resulted in the formation of several rhenium diborane(6) species, for example, [{(OC)4Re}{Re(CO)3}2(μ3-η2:η2:η2-B2H6)(μ-H)], 1; [{(OC)4Re}2{Re(CO)3}(μ3-η2:η2:η1-B2H6)(μ-H)], 2; and [{(OC)4Re}2(μ-η2:η2-B2H6)], 3, comprising diverse coordination modes of the [B2H6]2- ligand. Compound 1 contains a tris(bidentate) [B2H6]2- unit, whereas 2 consists of an unsymmetrically bound [μ3-η2:η2:η1-B2H6]2- ligand. In contrast, the irradiation of [Mn2(CO)10] with BH3·thf yielded only the Mn analogue of 1, [{(OC)4Mn}{Mn(CO)3}2(μ3-η2:η2:η2-B2H6)(μ-H)], 1'. In an attempt to generate the bimetallic Mn-diborane(6), we have carried out the reaction of 1' with PCy3 under photolytic conditions. The reaction led to the formation of two single base stabilized unsymmetrical diborane(5) species, [{Mn(CO)3}{Mn(CO)2PCy3}(μ-η2:η2-B2H5·PCy3)(μ-H)], 4, and [{Mn(CO)2PCy3}(η3-B2H5·PCy3)], 5. As [B2H6]2- and [B2H5·PCy3]- are isoelectronic, the bondings in 4 and 5 are analogous to that of diborane(6) species 1-3. All the new species have been characterized spectroscopically, and their structures were further confirmed by single-crystal X-ray diffraction studies. DFT-type quantum chemical calculations were carried out that provided insight into the bonding interaction of [B2H6]2- and [B2H5·PCy3]- with the M(CO)n fragments.
Collapse
Affiliation(s)
- Rini Prakash
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| | - Alaka Nanda Pradhan
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| | - Madhuri Jash
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| | - Samia Kahlal
- CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226 , Univ Rennes , F-35000 Rennes , France
| | - Marie Cordier
- CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226 , Univ Rennes , F-35000 Rennes , France
| | - Thierry Roisnel
- CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226 , Univ Rennes , F-35000 Rennes , France
| | - Jean-François Halet
- CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226 , Univ Rennes , F-35000 Rennes , France
| | - Sundargopal Ghosh
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| |
Collapse
|
3
|
Borthakur R, Saha K, Kar S, Ghosh S. Recent advances in transition metal diborane(6), diborane(4) and diborene(2) chemistry. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213021] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Adams GM, Ryan DE, Beattie NA, McKay AI, Lloyd-Jones GC, Weller AS. Dehydropolymerization of H 3B·NMeH 2 Using a [Rh(DPEphos)] + Catalyst: The Promoting Effect of NMeH 2. ACS Catal 2019; 9:3657-3666. [PMID: 30984472 PMCID: PMC6454579 DOI: 10.1021/acscatal.9b00081] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/02/2019] [Indexed: 01/01/2023]
Abstract
![]()
[Rh(κ2-PP-DPEphos){η2η2-H2B(NMe3)(CH2)2tBu}][BArF4]
acts as an effective precatalyst
for the dehydropolymerization of H3B·NMeH2 to form N-methylpolyaminoborane (H2BNMeH)n. Control of polymer molecular weight is
achieved by variation of precatalyst loading (0.1–1 mol %,
an inverse relationship) and use of the chain-modifying agent H2: with Mn ranging between 5 500
and 34 900 g/mol and Đ between 1.5 and
1.8. H2 evolution studies (1,2-F2C6H4 solvent) reveal an induction period that gets longer
with higher precatalyst loading and complex kinetics with a noninteger
order in [Rh]TOTAL. Speciation studies at 10 mol % indicate
the initial formation of the amino–borane bridged dimer, [Rh2(κ2-PP-DPEphos)2(μ-H)(μ-H2BN=HMe)][BArF4], followed by the crystallographically
characterized amidodiboryl complex [Rh2(cis-κ2-PP-DPEphos)2(σ,μ-(H2B)2NHMe)][BArF4]. Adding
∼2 equiv of NMeH2 in tetrahydrofuran (THF) solution
to the precatalyst removes this induction period, pseudo-first-order
kinetics are observed, a half-order relationship to [Rh]TOTAL is revealed with regard to dehydrogenation, and polymer molecular
weights are increased (e.g., Mn = 40 000
g/mol). Speciation studies suggest that NMeH2 acts to form
the precatalysts [Rh(κ2-DPEphos)(NMeH2)2][BArF4] and [Rh(κ2-DPEphos)(H)2(NMeH2)2][BArF4], which were independently synthesized and shown to
follow very similar dehydrogenation kinetics, and produce polymers
of molecular weight comparable with [Rh(κ2-PP-DPEphos){η2-H2B(NMe3)(CH2)2tBu}][BArF4], which has been doped
with amine. This promoting effect of added amine in situ is shown
to be general in other cationic Rh-based systems, and possible mechanistic
scenarios are discussed.
Collapse
Affiliation(s)
- Gemma M. Adams
- Chemistry Research Laboratories, Mansfield Road, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - David E. Ryan
- Chemistry Research Laboratories, Mansfield Road, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Nicholas A. Beattie
- Institute of Chemical Sciences, Heriot Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Alasdair I. McKay
- Chemistry Research Laboratories, Mansfield Road, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Guy C. Lloyd-Jones
- School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
| | - Andrew S. Weller
- Chemistry Research Laboratories, Mansfield Road, University of Oxford, Oxford OX1 3TA, United Kingdom
| |
Collapse
|
5
|
Chowdhury MG, Barik SK, Saha K, Kirubakaran B, Banerjee A, Ramkumar V, Ghosh S. Electron Precise Group 5 Dimetallaheteroboranes [{CpV(μ-EPh)}2{μ-η2:η2-BH3E}] and [{CpNb(μ-EPh)}2{μ-η2:η2-B2H4E}] (E = S or Se). Inorg Chem 2018; 57:985-994. [DOI: 10.1021/acs.inorgchem.7b02305] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Subrat Kumar Barik
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Koushik Saha
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | | | - Abhishek Banerjee
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | | | - Sundargopal Ghosh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| |
Collapse
|
6
|
Guermoune A, Cherqaoui D, Jarid A, Liebman JF. Structure and decomposition of [HFe(CO)4(B2H5)], a revised behavior of an old uncharacterized complex. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.03.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
7
|
Cabon N, Petillon FY, Schollhammer P, Talarmin J, Muir KW. Reaction of BH4−with {Mo2Cp2(μ-SMe)n} species to give tetrahydroborato, hydrido or dimetallaborane compounds: control of product by ancillary ligands. Dalton Trans 2004:2708-19. [PMID: 15514756 DOI: 10.1039/b407564a] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of mono- or dichloro-dimolybdenum(III) complexes [Mo2Cp2(mu-SMe)2(mu-Cl)(mu-Y)] (Cp=eta5-C5H5; 1, Y=SMe; 2, Y=PPh2; 3, Y=Cl) with NaBH4 at room temperature gave in high yields tetrahydroborato (8), hydrido (9) or metallaborane (12) complexes depending on the ancillary ligands. The correct formulation of derivatives and has been unambigously determined by X-ray diffraction methods. That of the hydrido compound 9 has been established in solution by NMR analysis and confirmed by an X-ray study of the mu-azavinylidene derivative [Mo2Cp2(mu-SMe)2(mu-PPh2)(mu-N=CHMe)] (10) obtained from the insertion of acetonitrile into the Mo-H bond of 9. Reaction of NaBH4 with nitrile derivatives, [Mo2Cp2(mu-SMe)4-n(CH3CN)2n]n+(5, n=1; 6 n=2), afforded the tetrahydroborato compound 8, together with a mu-azavinylidene species [Mo2Cp2(mu-SMe)3(mu-N=CHMe)](14), when n=1, and the metallaborane complex 12, together with a mixed borohydrato-azavinylidene derivative [Mo2Cp2(mu-SMe)2(mu-BH4)(mu-N=CHMe)] (13), when n=2. The molecular structures of these complexes have been confirmed by X-ray analysis. Preparations of some of the starting complexes (3 and 4) are also described, as are the molecular structures of the precursors [Mo2Cp2(mu-SMe)2(mu-X)(mu-Y)] (1, X/Y=Cl/SMe; 2, X/Y=Cl/PPh2; 4, X/Y=SMe/PPh2).
Collapse
Affiliation(s)
- Nolwenn Cabon
- UMR CNRS 6521, Chimie, Electrochimie Moléculares et Chimie Analytique, UFR Sciences et Techniques, Université de Bretagne Occidentale, France
| | | | | | | | | |
Collapse
|
8
|
Jun CS, Bandyopadhyay AK, Fehlner TP. Synthesis of B2H5FeCo(CO)6, Fe2Co(CO)9(μ-CO)BH2, FeCo2(CO)9(μ-CO)BH, FeCo2(CO)9(BH)2, and HFe3Co(CO)12BH. Co(CO)3 Fragment Addition and Fragment Exchange in Ferraborane Clusters. Inorg Chem 2003. [DOI: 10.1021/ic951352n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chang Soo Jun
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Ananda K. Bandyopadhyay
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Thomas P. Fehlner
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| |
Collapse
|
9
|
Hillier AC, Jacobsen H, Gusev D, Schmalle HW, Berke H. [[Fe(PEt(3))(3)](2)(mu-H)(6)B][BPh(4)]: a complex containing octahedral hypercoordinate boron. Inorg Chem 2001; 40:6334-7. [PMID: 11703141 DOI: 10.1021/ic010477r] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A C Hillier
- Anorganisch-Chemisches Institut, Universität Zürich,Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | | | | | | | | |
Collapse
|
10
|
McCarthy DA, Durie HE, Embry JJ, Imbur LA, Marhoefer KA. Deprotonation of ferraborane clusters and their relative acidities. Inorg Chem 2001; 40:1972-4. [PMID: 11312756 DOI: 10.1021/ic000818l] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D A McCarthy
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556-5001, USA
| | | | | | | | | |
Collapse
|
11
|
Pangan LN, Kawano Y, Shimoi M. Syntheses and Structures of New Diruthenatetraborane Complexes Exhibiting Novel Modes of Coordination for a B2H5 Fragment: Phosphine-Complexed [(Cp*Ru)2(μ-H)(∥-μ-η4-B2H5)(PR3)] (PR3 = PMe3, PMe2Ph) and Phosphido-Bridged nido-[(Cp*Ru)2(μ-PMe2)(⊥-μ-η4-B2H5)]1. Organometallics 2000. [DOI: 10.1021/om000568g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lourdes N. Pangan
- Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan
| | - Yasuro Kawano
- Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan
| | - Mamoru Shimoi
- Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan
| |
Collapse
|
12
|
Weller AS, Shang M, Fehlner TP. Synthesis of Mono- and Ditungstaboranes from Reaction of Cp*WCl4 and [Cp*WCl2]2 with BH3·thf or LiBH4 (Cp* = η5-C5Me5). Control of Reaction Pathway by Choice of Monoboron Reagent and Oxidation State of Metal Center. Organometallics 1998. [DOI: 10.1021/om980743h] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew S. Weller
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 45665
| | - Maoyu Shang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 45665
| | - Thomas P. Fehlner
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 45665
| |
Collapse
|
13
|
Aldridge S, Hashimoto H, Kawamura K, Shang M, Fehlner TP. Cluster Expansion Reactions of Group 6 Metallaboranes. Syntheses, Crystal Structures, and Spectroscopic Characterizations of (Cp*Cr)2B5H9, (Cp*Cr)2B4H8Fe(CO)3, (Cp*Cr)2B4H7Co(CO)3, and (Cp*Mo)2B5H9Fe(CO)3. Inorg Chem 1998. [DOI: 10.1021/ic971251k] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Simon Aldridge
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Hisako Hashimoto
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Kazumori Kawamura
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Maoyu Shang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - Thomas P. Fehlner
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| |
Collapse
|
14
|
Goodreau BH, Orlando LR, Long GJ, Spencer JT. Small Heteroborane Cluster Systems. 6. Mössbauer Effect Study of Iron Substituted Small Metallaborane Clusters. Inorg Chem 1996; 35:6579-6585. [PMID: 11666807 DOI: 10.1021/ic9605478] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Mössbauer effect spectra for a series of small [Fe(eta(5)-C(5)H(5))(CO)(x)()] substituted metallaborane complexes are reported, where x = 1 or 2. The pentaborane cage in compounds [Fe(eta(5)-C(5)H(5))(CO)(2)B(5)H(7)P(C(6)H(5))(2)] (1), [Fe(eta(5)-C(5)H(5))(CO)(2)B(5)H(8)] (2), and [(Fe(eta(5)-C(5)H(5))(CO)(2))(2)B(5)H(7)] (3) was found to act as a significantly better donor ligand than the ligands in a comparison group of previously reported [Fe(eta(5)-C(5)H(5))(CO)LX] complexes, where L = CO or PPh(3) and X = halide, pseudohalide, or alkyl ligands. These metallaborane complexes were found to most resemble their silyl analogues in Mössbauer spectral parameters and the electronic distribution around the iron centers. In addition, the Mössbauer data showed that the [&mgr;-2,3-(P(C(6)H(5))(2)B(5)H(7)](-) ligand was a superior donor to the corresponding unsubstituted [B(5)H(8)](-) ligand. The Mössbauer spectral results for the metallaborane complexes studied were found to be in general agreement with the anticipated donor and accepting bonding considerations for the cage ligands based upon their infrared and (11)B NMR spectra and X-ray structural features. The Mössbauer data for the [Fe(eta(5)-C(5)H(5))(CO)B(4)H(6)(P(C(6)H(5))(2))] (4) and [Fe(eta(5)-C(5)H(5))(CO)B(3)H(7)(P(C(6)H(5))(2))] (5) complexes, in comparison with compound 1, showed that as the borane cage becomes progressively smaller, it becomes a poorer donor ligand. A qualitative relationship was found between the observed Mössbauer isomer shift data and the number of boron cage vertices for the structurally related [Fe(eta(5)-C(5)H(5))(CO)(x)B(y)H(z)P(C(6)H(5))(2)] complexes, where x = 1 or 2, y = 3-5, and z = 6 or 7. The X-ray crystallographic data for compounds 1, 2, 5, and [Fe(eta(5)-C(5)H(5))(CO)B(5)H(8)] (6) were also found to agree with the trends observed in the Mössbauer spectra which showed that the s-electron density on the iron nucleus increases in the order 5 < 6 < 2 < 1. The X-ray crystal structure of complex 2 is also reported. Crystallographic data for 2: space group P2(1)/c (No. 14, monoclinic), a = 6.084(3) Å, b = 15.045(8) Å, c = 13.449(7) Å, beta = 99.69(5) degrees, V = 1213(1) Å(3), Z = 4 molecules/cell.
Collapse
Affiliation(s)
- Bruce H. Goodreau
- Department of Chemistry and the W. M. Keck Center for Molecular Electronics, Center for Science and Technology, Syracuse University, Syracuse, New York 13244-4100, and Department of Chemistry, University of Missouri-Rolla, Rolla, Missouri 65401-0249
| | | | | | | |
Collapse
|
15
|
Hashimoto H, Shang M, Fehlner TP. Clusters as Ligands. Coordination of an Electronically Unsaturated Chromaborane to an Iron Tricarbonyl Fragment. J Am Chem Soc 1996. [DOI: 10.1021/ja9616387] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hisako Hashimoto
- Department of Chemistry and Biochemistry University of Notre Dame, Notre Dame, Indiana 46556
| | - Maoyu Shang
- Department of Chemistry and Biochemistry University of Notre Dame, Notre Dame, Indiana 46556
| | - Thomas P. Fehlner
- Department of Chemistry and Biochemistry University of Notre Dame, Notre Dame, Indiana 46556
| |
Collapse
|
16
|
Reactions of Na[Mo(CO)3(η5-C5H5)] towards CoCl(PPh3)3 and CoCl(P(OMe)3)5: X-ray crystal structures of [MoCo(CO)6(PPh3)(η5-C5H5)] and [Mo(CO)3(P(OMe)3)(η5-C5H5)]2. Polyhedron 1996. [DOI: 10.1016/0277-5387(95)00546-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
17
|
Bould J, Rath NP, Barton L. Synthesis and Characterization of nido-[1,1,2,2-(CO)(4)-1,2-(PPh(3))(2)-1,2-FeIrB(2)H(5)]: A Heterobimetallaborane Analogue of nido-[B(4)H(7)](-). Inorg Chem 1996; 35:35-39. [PMID: 11666160 DOI: 10.1021/ic950696a] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and characterization of nido-[1,1,2,2-(CO)(4)-1,2-(PPh(3))(2)-1,2-FeIrB(2)H(5)] (1) is reported. 1 is formed in low yield as a degradation product from the reaction between [{&mgr;-Fe(CO)(4)}B(6)H(9)](-) and trans-Ir(CO)Cl(PPh(3))(2) in THF and is characterized from NMR, IR, and analytical data and by a single-crystal X-ray diffraction study. 1 crystallizes in the monoclinic space group P2(1)/n with a = 12.8622(12), b = 14.3313(12), c = 23.579(3) Å, beta = 97.12(2) degrees, Z = 4, V = 4257.0(8) Å(3), R(1) = 4.83%, and wR(2)()(F(2)) = 12.43%. The heterobimetallaborane structure may be viewed as a derivative of the binary boron hydride nido-[B(4)H(7)](-) and is related to the known homobimetallatetraborane analogues [Fe(2)(CO)(6)B(2)H(6)] and [Co(2)(CO)(6)B(2)H(4)]. 1 exhibits proton fluxionality in its (1)H NMR spectrum, which is related to that found in the latter two compounds.
Collapse
Affiliation(s)
- Jonathan Bould
- Department of Chemistry, University of Missouri-St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121
| | | | | |
Collapse
|
18
|
|
19
|
|
20
|
Housecroft CE. Boron Atoms in Transition Metal Clusters. ADVANCES IN ORGANOMETALLIC CHEMISTRY 1991. [DOI: 10.1016/s0065-3055(08)60693-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
21
|
Meng X, Bandyopadhyay AK, Fehlner TP, Grevels FW. Synthesis of metal-rich metallaborane clusters. Evidence for a mechanism involving fragment condensation. J Organomet Chem 1990. [DOI: 10.1016/0022-328x(90)87219-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
22
|
Chipperfield AK, Housecroft CE, Matthews DM. Ru3(CO)9B2H6: A metal-rich ruthenaborane analogue of pentaborane(9) and a model for a triruthenium supported unsaturated hydrocarbon. J Organomet Chem 1990. [DOI: 10.1016/0022-328x(90)87081-n] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Trachtman M, Bock CW, Niki H, Mains GJ. Double H-bridged and single H-bridged diboryl radicals. Struct Chem 1990. [DOI: 10.1007/bf00674259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
24
|
|
25
|
|