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Lee TB, McKee ML. Redox Energetics of Hypercloso Boron Hydrides BnHn (n = 6–13) and B12X12 (X = F, Cl, OH, and CH3). Inorg Chem 2012; 51:4205-14. [DOI: 10.1021/ic202660d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Tae Bum Lee
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Michael L. McKee
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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Farràs P, Juárez-Pérez EJ, Lepšík M, Luque R, Núñez R, Teixidor F. Metallacarboranes and their interactions: theoretical insights and their applicability. Chem Soc Rev 2012; 41:3445-63. [DOI: 10.1039/c2cs15338f] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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3
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Adams CJ, Franken A, Hodson BE, McGrath TD, Stone FGA. Paramagnetic 10-Vertex Ferramonocarboranes. Organometallics 2010. [DOI: 10.1021/om9009679] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Andreas Franken
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Bruce E. Hodson
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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Carr MJ, McGrath TD, Stone FGA. Synthesis and Reactivity of 10-Vertex arachno-Platinacarboranes. Organometallics 2008. [DOI: 10.1021/om7012056] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael J. Carr
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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Franken A, McGrath TD, Stone FGA. A 10-Vertex Iron−Dicarbollide System Formed by Insertion of {Fe(CO)4} into 8-Vertex [closo-1-CB7H8]−: Synthesis and Reactivity Studies. Organometallics 2008. [DOI: 10.1021/om700865s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Franken
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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Carr MJ, McGrath TD, Stone FGA. Photochemical Synthesis and Reactivity Studies of Dirhenacarboranes. Inorg Chem 2007; 47:713-22. [DOI: 10.1021/ic701496x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael J. Carr
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
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Franken A, Hodson BE, McGrath TD, Stone FGA. Synthesis and reactivity of fluorinated ferracarborane anions. Dalton Trans 2007:2254-62. [PMID: 17534486 DOI: 10.1039/b701219e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ferracarborane [N(PPh3)2][6,6,6,10,10,10-(CO)6-closo-6,10,1-Fe2CB7H8] reacts in CH2Cl2 with 3 molar equivalents of Ag[PF6] to yield the trifluoro-substituted species [N(PPh3)2][7,8,9-F3-6,6,6,10,10,10-(CO)6-closo-6,10,1-Fe2CB7H5]. Compound undergoes structural rearrangement in toluene at reflux temperatures, forming [N(PPh3)2][8,9,10-F3-6,6,6,7,7,7-(CO)6-closo-6,7,1-Fe2CB7H5]. Alternatively, reaction of either or with a 10-fold excess of Ag[PF6] in CH2Cl2 forms two species: namely, [N(PPh3)2][2,7,9,10-F4-6,6,6,8,8,8-(CO)6-closo-6,8,1-Fe2CB7H4], in which one further B-F substitution has occurred and the {Fe2CB7} cluster core has rearranged, plus a mono-iron co-product, [N(PPh3)2][3,8,9-F3-7,7,7-(CO)3-closo-7,1-FeCB7H5] that is formed by polyhedral contraction. Treatment of with [NO][BF4] in CH2Cl2 results in CO substitution at the 4-connected iron vertex [Fe10], producing the zwitterionic complex [7,8,9-F3-6,6,6,10,10-(CO)5-10-NO-closo-6,10,1-Fe2CB7H5]. Addition of Me3NO to a mixture of and PEt3 in CH2Cl2 also results in CO substitution, forming the isomeric species [N(PPh3)2][7,8,9-F3-6,6,m,10,10-(CO)5-n-PEt3-closo-6,10,1-Fe2CB7H5] [m=6, n=10; m=10, n=6] in a 5:1 ratio. Treatment of with [NO][BF4] and then CNBut in CH2Cl2 allows further, successive CO substitution at Fe10 to yield first a neutral, zwitterionic complex [7,8,9-F3-6,6,6,10-(CO)4-10-NO-10-PEt3-closo-6,10,1-Fe2CB7H5] and then [7,8,9-F3-6,6,6-(CO)3-10-CNBut-10-NO-10-PEt3-closo-6,10,1-Fe2CB7H5]. The molecular structures of compounds and have been established by X-ray diffraction.
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Affiliation(s)
- Andreas Franken
- Department of Chemistry & Biochemistry, Baylor University, Waco, TX 76798-7348, USA
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McGrath TD, Du S, Hodson BE, Stone FGA. Construction of Metal Butterflies on a Metallacarborane Scaffold. 2. Synthesis and Structures of Hetero-tri- and -tetrametallic Clusters. Organometallics 2006. [DOI: 10.1021/om060418r] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Shaowu Du
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Bruce E. Hodson
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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McGrath TD, Du S, Hodson BE, Lu XL, Stone FGA. Construction of Metal Butterflies on a Metallacarborane Scaffold. 1. Synthesis and Structures of Bimetallic Precursors. Organometallics 2006. [DOI: 10.1021/om060417z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Shaowu Du
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Bruce E. Hodson
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Xiu Lian Lu
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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Synthesis of the manganese-monocarbollide dianion [1-NHBut-2,2,2-(CO)3-closo-2,1-MnCB10H10]2−: Reactions with transition metal cations. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.10.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Lu XL, McGrath TD, Stone FGA. Synthesis and Reactivity of 10- and 12-Vertex Cobalt−Monocarborane Anions Containing Multiple Metal Centers. Organometallics 2006. [DOI: 10.1021/om060123d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiu Lian Lu
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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12
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Franken A, McGrath TD, Stone FGA. Ten-vertex iron-monocarbollide complexes: synthesis and reactivity of the anion [4,9-{Fe(CO)4}-9,9,9-(CO)3-arachno-9,6-FeCB8H11]-. Inorg Chem 2006; 45:2669-77. [PMID: 16529490 DOI: 10.1021/ic051946i] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reagent [arachno-4-CB8H14] reacts with [Fe3(CO)12] in tetrahydrofuran (THF) at reflux temperatures, followed by addition of [N(PPh3)2]Cl, to afford [N(PPh3)2][4,9-{Fe(CO)4}-9,9,9-(CO)3-arachno-9,6-FeCB8H11] (3). In the anion of 3, one iron atom is part of the open CBBFeBB face of a 10-vertex {arachno-9,6-FeCB8} cage, to which the second iron atom is attached via an Fe-Fe bond and an additional exo-polyhedral Fe-B sigma bond. Upon heating 3 in refluxing toluene, the closed 10-vertex species [N(PPh3)2][2,2,2-(CO)3-closo-2,1-FeCB8H9] (4) is obtained, whereas the isomeric compound [N(PPh3)2][6,6,6-(CO)3-closo-6,1-FeCB8H9] (5) is isolated upon heating [closo-4-CB8H9]- and [Fe3(CO)12] in refluxing THF with subsequent addition of [N(PPh3)2]Cl. Protonation of 3 using CF3SO3H in CH2Cl2 gives the charge-compensated compound [4,9-{Fe(CO)4}-4-(mu-H)-9,9,9-(CO)3-arachno-9,6-FeCB8H11] (6), in which the B-Fe sigma bond of the precursor has been converted to a B-H right harpoon-up Fe linkage. In contrast, 3 with {M(PPh3)}+ gives the trimetallic species [1,3,4,9-{MFe(CO)4(PPh3)}-1,3-(mu-H)2-9,9,9-(CO)3-arachno-9,6-FeCB8H9] (M = Cu (7), Ag 8) in which the three metal centers form a V-shaped M-Fe-Fe unit. Compound 6 reacts with PEt3 in the presence of Me(3)NO to yield [4,9-(PEt3)2-9,9-(CO)2-nido-9,6-FeCB8H10] (9). In the latter, the formerly exo-polyhedral {Fe(CO)4} fragment has been replaced by a PEt3 ligand, with a second PEt3 substituting one CO group at the remaining cluster iron vertex. The novel structural features of compounds 3-9 have been confirmed by single-crystal X-ray diffraction studies.
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Affiliation(s)
- Andreas Franken
- Department of Chemistry and Biochemistry, Baylor University Waco, Texas 76798-7348, USA
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Jelliss PA, Mason J, Nazzoli JM, Orlando JH, Vinson A, Rath NP, Shaw MJ. Synthesis and Characterization of Ruthenacarborane Complexes Incorporating Chelating N-Donor Ligands: Unexpected Luminescence from the Complex [3-CO-3,3-{κ2-Me2N(CH2)2NMe2}-closo-3,1,2-RuC2B9H11]. Inorg Chem 2005; 45:370-85. [PMID: 16390078 DOI: 10.1021/ic051463e] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A synthetic methodology using double carbonyl substitution of the starting tricarbonyl complex [3,3,3-(CO)(3)-closo-3,1,2-RuC(2)B(9)H(11)] (1) with 2 mol equiv of the reagent Me(3)NO has been employed to afford ruthenacarborane complexes with chelating N-donor ligands. Three of these complexes, [3-CO-3,3-[kappa(2)-4,4'-R(2)-2,2'-(NC(5)H(3))(2)]-closo-3,1,2-RuC(2)B(9)H(11)] (3a, R = H; 3b, R = (CH(2))(8)Me; 3c, R = Bu(t)), comprise 2,2'-bipyridyl ligands with hydrogen, n-nonyl, or t-butyl groups in the 4,4'-positions of the rings, respectively. Photophysical analysis revealed no substantial luminescent activity, but the complexes are electrochemically active, undergoing sequential (reversible and quasi-reversible) one-electron reductions, the second of which likely precipitating a ligand displacement. Cyclic voltammetry (CV) experiments revealed an irreversible one-electron oxidation (E(pa) approximately 0.9 V) in MeCN, on the other hand, followed by rapid CO substitution by the solvent and reversible secondary reduction (E(1/2) approximately 0.1 V). The primary redox couple became quasi-reversible in CH(2)Cl(2), and spectroelectrochemical analysis of complex 3c provided evidence of a closo --> isocloso structural modification upon oxidation. An analogue of these complexes employing the TMEDA (N,N,N',N'-tetramethylethylenediamine) ligand, [3-CO-3,3-[kappa(2)-Me(2)N(CH(2))(2)NMe(2)]-closo-3,1,2-RuC(2)B(9)H(11)] (4), was synthesized using the same methodology. Cyclic voltammetric measurements displayed a reversible metal-based one-electron oxidation whether in CH(2)Cl(2) or MeCN, with no indication of subsequent CO substitution or a similar closo --> isocloso adjustment. Complex 4 was unexpectedly weakly luminescent (lambda(em) = 360 nm) in THF (tetrahydrofuran) at ambient temperatures, demonstrating a more intense phosphorescent emission in MeTHF (2-methyltetrahydrofuran) glass at 77 K (lambda(em) = 450 nm, tau(450) = 0.77 ms). The X-ray crystallographic structures of complexes 3a and 4 are reported along with spectroscopic IR, NMR ((1)H, (13)C, (11)B), UV-vis absorption, EPR, and CV data.
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Affiliation(s)
- Paul A Jelliss
- Department of Chemistry, Saint Louis University, St. Louis, Missouri 63103, USA.
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Hodson BE, McGrath TD, Stone FGA. Synthesis and Reactivity of the 13-Vertex Metallacarborane Anions [4,4,4-(CO)3-closo-4,1,6-MC2B10H12]- (M = Re, Mn). Organometallics 2005. [DOI: 10.1021/om050226g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bruce E. Hodson
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
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Du S, Jeffery JC, Kautz JA, Lu XL, McGrath TD, Miller TA, Riis-Johannessen T, Stone FGA. Reactions of the dianion [1,1,1-(CO)3-2-Ph-closo-1,2-MnCB9H9]2- with transition-metal cations: facile insertion and then extrusion of cluster vertexes. Inorg Chem 2005; 44:2815-25. [PMID: 15819570 DOI: 10.1021/ic048345w] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The manganacarborane dianion in [N(PPh(3))(2)][NEt(4)][1,1,1-(CO)(3)-2-Ph-closo-1,2-MnCB(9)H(9)] (1b) reacts with cationic transition metal-ligand fragments to give products in which the electrophilic metal groups (M') are exo-polyhedrally attached to the {closo-1,2-MnCB(9)} cage system via three-center two-electron B-H --> M' linkages and generally also by Mn-M' bonds. With {Cu(PPh(3))}(+), the Cu-Mn-Cu trimetallic species [1,6-{Cu(PPh(3))}-1,7-{Cu(PPh(3))}-6,7-(mu-H)(2)-1,1,1-(CO)(3)-2-Ph-closo-1,2-MnCB(9)H(7)] (3a) is formed, whereas reactions with {M'(dppe)}(2+) (M' = Ni, Pd; dppe = Ph(2)PCH(2)CH(2)PPh(2)) give [1,3-{Ni(dppe)}-3-(mu-H)-1,1,1-(CO)(3)-2-Ph-closo-1,2-MnCB(9)H(8)] (5a) and [1,3,6-{Pd(dppe)}-3,6-(mu-H)(2)-1,1,1-(CO)(3)-2-Ph-closo-1,2-MnCB(9)H(7)] (5b), both of which contain M'-Mn bonds. The latter reaction with M' = Pt affords [3,6-{Pt(dppe)}-3,6-(mu-H)(2)-1,1,1-(CO)(3)-2-Ph-closo-1,2-MnCB(9)H(7)] (6), which lacks a Pt-Mn connectivity. Compound 6 itself spontaneously converts to [1-Ph-2,2,2-(CO)(3)-8,8-(dppe)-hypercloso-8,2,1-PtMnCB(9)H(9)] (7b) and thence to [3,6,7-{Mn(CO)(3)}-3,7-(mu-H)(2)-1-Ph-6,6-(dppe)-closo-6,1-PtCB(8)H(6)] (8). This sequence occurs via initial insertion of the {Pt(dppe)} unit and then extrusion of {Mn(CO)(3)} and one {BH} vertex. In the presence of alcohols ROH, compound 6 is transformed to the 7-OR substituted analogues of 7b. X-ray diffraction studies were essential in elucidating the structures encountered in compounds 5-8 and hence in understanding their behavior.
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Affiliation(s)
- Shaowu Du
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348, USA
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Halogenated rhenacarboranes: optoelectronic behavior of the iodinated rhenacarborane complex anion [3,3,3-(CO)3-8-I-closo-3,1,2-ReC2B9H10]−. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2004.09.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Metal Complexes of Monocarbon Carboranes: A Neglected Area of Study? ADVANCES IN ORGANOMETALLIC CHEMISTRY 2005. [DOI: 10.1016/s0065-3055(05)53001-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Lei P, McGrath TD, Stone FGA. The bis-molybdenum(0) trianion [1,3,6-{Mo(CO)3}-3,6-(µ-H)2-1,1,1-(CO)3-2-Ph-closo-1,2-MoCB9H7]3– and its use as a scaffold in the assembly of heteropolymetallic complexes. Chem Commun (Camb) 2005:3706-8. [PMID: 16027918 DOI: 10.1039/b505841d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The title trianion reacts successively with cationic transition-metal fragments to afford a heterotrimetallic Mn-Mo-Pt species.
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Affiliation(s)
- Peng Lei
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348, USA
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Hata M, Kautz JA, Lu XL, McGrath TD, Stone FGA. Revisiting [Mn(CO)3(η5-nido-7,8-C2B9H11)]-, the Dicarbollide Analogue of [(η5-C5H5)Mn(CO)3]: Reactivity Studies Leading to Boron Atom Functionalization. Organometallics 2004. [DOI: 10.1021/om049822l] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mitsuhiro Hata
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Jason A. Kautz
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Xiu Lian Lu
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798-7348
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