Metal atom synthesis of metalla boron clusters. 5. Synthesis of the first (.eta.6-arene)metallaborane and (.eta.6-arene)metallaoxaborane clusters. Structural characterizations of 5-[.eta.6-C6(CH3)3H3]FeB9H13 and 2-[.eta.6-C6(CH3)3H3]Fe-6-OB8H10

Micciche, Robert P.; Briguglio, James J.; Sneddon, Larry G.

doi:10.1021/ic00192a030

Cited by 70 publications

(25 citation statements)

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“…Structural comparison of clusters 2 and 4-6: Structurally characterized polyhedral heteroborane clusters that contain oxygen as a cluster constituent with a cluster connectivity of three are very rare. [37] Until now, few of these types are known, they are: nido-[(h 6 -C 6 H 3 Me 3 )FeOB 8 H 10 ], [38] arachno-[(PMe 2 Ph) 2 PtOB 8 H 10 ], [34] nido-[Cp*RhOB 10 H 10 A C H T U N G T R E N N U N G (NEt 3 )], [27,35] nido-[Cp*RhOB 10 H 9 ClA C H T U N G T R E N N U N G (PMe 2 Ph)], [27,31] [(Cp*Mo) 2 B 5 (m 3 -OEt)H 6 R (R= H, nBuO), [39] and [(Cp*Ta) 2 B 4 H 10 O]. [24] The oxavanadaborane cluster species of type 6, which has an oxygen atom in an open-face position, is unprecedented and, to the best of our knowledge, this is the first oxavanadaborane to be reported.…”

Section: Synthesis and Characterization Of Oxavanadaborane 6 And Vanamentioning

confidence: 99%

Synthesis and Structural Characterization of New Divanada‐ and Diniobaboranes Containing Chalcogen Atoms

Roy

Bose

Geetharani

et al. 2012

Chemistry A European J

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The reaction of [Cp(n)MCl(4-x)] (M=V: n=2, x=2; M=Nb: n=1, x=0; Cp=η(5)-C(5) H(5)) with LiBH(4)⋅THF followed by thermolysis in the presence of dichalcogenide ligands E(2)R(2) (E=S, Te; R=2,6-(tBu)(2)-C(6)H(2)OH, Ph) and 2-mercaptobenzothiazole (C(7)H(5)NS(2)) yielded dimetallaheteroboranes [{CpV(μ-TePh)}(2)(μ(3) -Te)BH⋅thf] (1), [(CpV)(2)(BH(3)S)(2)] (2), [(CpNb)(2)B(4)H(10)S] (3), [(CpNb)(2)B(4)H(11)S(tBu)(2)C(6)H(2)OH] (4), and [(CpNb)(2)B(4)H(11)TePh] (5). In cluster 1, the V(2)BTe atoms define a tetrahedral framework in which the boron atom is linked to a THF molecule. Compound 2 can be described as a dimetallathiaborane that is built from two edge-fused V(2)BS tetrahedron clusters. Cluster 3 can be considered as an edge-fused cluster in which a trigonal-bipyramidal unit (Nb(2)B(2)S) has been fused with a tetrahedral core (Nb(2)B(2)) by means of a common Nb(2) edge. In addition, thermolysis of an in-situ-generated intermediate that was produced from the reaction of [Cp(2)VCl(2)] and LiBH(4)⋅THF with excess BH(3)⋅THF yielded oxavanadaborane [(CpV)(2)B(3)H(8)(μ(3)-OEt)] (6) and divanadaborane cluster [(CpV)(2)B(5)H(11)] (7). Cluster 7 exhibits a nido geometry with C(2v) symmetry and it is isostructural with [(Cp*M)(2)B(5)H(9+n)] (M=Cr, Mo, and W, n=0; M=Ta, n=2; Cp*=η(5)-C(5)Me(5)). All of these new compounds have been characterized by (1)H NMR, (11)B NMR, and (13)C NMR spectroscopy and elemental analysis and the structural types were established unequivocally by crystallographic analysis of compounds 1-4, 6, and 7.

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Section: Synthesis and Characterization Of Oxavanadaborane 6 And Vanamentioning

confidence: 99%

Synthesis and Structural Characterization of New Divanada‐ and Diniobaboranes Containing Chalcogen Atoms

Roy

Bose

Geetharani

et al. 2012

Chemistry A European J

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“…Apart from the carboranes and metallacarboranes, the most wide-ranging maingroup polyhedral heteroboranes are thiaboranes and thiametallaboranes. By contrast, polyborane-based boron containing clusters that also contain other group 16 elements as a cluster constituent are less [15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

Sahoo

Mobin

Ghosh

2010

Journal of Organometallic Chemistry

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“…6 Lately, vanadium has adopted t h e status of an catalytically active center in t h e nitrogenase system of a special strain of Azotobacter chroococcuml and in the vanadate(V)-dependent halide peroxidases of several marine brown algae such as Ascophyllum n o d o~u m .~*~ Further, t h e binding of V(1V) and V(V) to serum transferrin has been documented.lO~ll More recently, the excellent NMR properties of the 51V nu-cleus12 have been exploited in the evaluation of the interaction between vanadate(V) and large biomolecules such as ribo-n~clease,'~ transferrin," and peroxidase from A . toward N~, K -A T P~s~.~ Vanadium has also been recognized as an essential element in photosynthesis: as a storage for redox potentials in the "blood" of ascidian^,^ and as an integral part in amavadine, a hydroxamate complex of V occurring in A m a n i t a muscaria.…”

mentioning

confidence: 99%

Vanadium-51 shielding in vanadium(V) complexes: a reference scale for vanadium binding sites in biomolecules

Rehder¹,

Weidemann²,

Duch³

et al. 1988

Inorg. Chem.

177

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The role of vanadium as a biometal is well established1 and encompasses stimulating and regulatory* as well as inhibitory functions, e.g. toward N~, K -A T P~s~.~ Vanadium has also been recognized as an essential element in photosynthesis: as a storage for redox potentials in the "blood" of ascidian^,^ and as an integral part in amavadine, a hydroxamate complex of V occurring in A m a n i t a muscaria.6 Lately, vanadium has adopted t h e status of an catalytically active center in t h e nitrogenase system of a special strain of Azotobacter chroococcuml and in the vanadate(V)-dependent halide peroxidases of several marine brown algae such as Ascophyllum n o d o~u m .~*~ Further, t h e binding of V(1V) and V(V) to serum transferrin has been documented.lO~ll More recently, the excellent NMR properties of the 51V nu-cleus12 have been exploited in the evaluation of the interaction between vanadate(V) and large biomolecules such as ribo-n~clease,'~ transferrin," and peroxidase from A . nodosum,14 the latter being the first 51V NMR detection of an enzyme containing vanadate(V) as the prosthetic group.In order to provide a basis for t h e interpretation of vanadium NMR data of biological material, we report here on a referencing scale for 51V chemical shifts, 6(51V), incorporating t h e presently available shift data on V5+ compounds (including recent work on the interaction between vanadate and biorelevant ligandsI5), (a) Chasteen, N. D. Strucr. Bonding (Berlin) 1983,53, 105. (b) Kustin, K.; McLecd, G. C.; Gilbert, T. A.; Briggs, L. R., 4th. Eady, R. R.; Richardson, T. H.; Miller, R. W.; Hawkins, M.; Postgate, J. R. Nature (London) 1986, 322, 388. (b) Arber, J. M.; Dobson, B. R.; Eady. R. R.; Stevens, P.; Hasnain, S. S.; Garner, C. D.; Smith, B. E. Nature (London) 1987, 325, 372. (a) Vilter, H. Bot. Mar. 1983, 26,451. (b) Vilter, H. Phytochemisfry 19848 23, 1387. de Boer, E.; van Kooyk, Y.; Tromp, M. G. M.; Plat, H.; Wever, R.

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Metal atom synthesis of metalla boron clusters. 5. Synthesis of the first (.eta.6-arene)metallaborane and (.eta.6-arene)metallaoxaborane clusters. Structural characterizations of 5-[.eta.6-C6(CH3)3H3]FeB9H13 and 2-[.eta.6-C6(CH3)3H3]Fe-6-OB8H10

Cited by 70 publications

References 0 publications

Synthesis and Structural Characterization of New Divanada‐ and Diniobaboranes Containing Chalcogen Atoms

Synthesis and Structural Characterization of New Divanada‐ and Diniobaboranes Containing Chalcogen Atoms

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

Vanadium-51 shielding in vanadium(V) complexes: a reference scale for vanadium binding sites in biomolecules

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