Geetharani, K. ; Bose, Shubhankar Kumar ; Varghese, Babu ; Ghosh, Sundargopal (2010) From metallaborane to borylene complexes: syntheses and structures of triply bridged ruthenium and tantalum borylene complexes Chemistry - A European Journal, 16 (37). pp. 11357-11366. ISSN 0947-6539
Full text not available from this repository.
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/chem.20...
Related URL: http://dx.doi.org/10.1002/chem.201001208
Abstract
Reaction of [1,2-(Cp*RuH)2B3H7] (1; Cp*=η5-C5Me5) with [Mo(CO)3(CH3CN)3] yielded arachno-[(Cp*RuCO)2B2H6] (2), which exhibits a butterfly structure, reminiscent of 7 sep B4H10. Compound 2 was found to be a very good precursor for the generation of bridged borylene species. Mild pyrolysis of 2 with [Fe2 (CO)9] yielded a triply bridged heterotrinuclear borylene complex [(μ3-BH)(Cp*RuCO)2 (μ-CO){Fe(CO)3}] (3) and bis-borylene complexes [{(μ3-BH)(Cp*Ru)(μ-CO)}2Fe2 (CO)5] (4) and [{(μ3-BH)(Cp*Ru)Fe(CO)3}2 (μ-CO)] (5). In a similar fashion, pyrolysis of 2 with [Mn2(CO)10] permits the isolation of μ3-borylene complex [(μ3-BH)(Cp*RuCO)2 (μ-H)(μ-CO){Mn(CO)3}] (6). Both compounds 3 and 6 have a trigonal-pyramidal geometry with the μ3-BH ligand occupying the apical vertex, whereas 4 and 5 can be viewed as bicapped tetrahedra, with two μ3-borylene ligands occupying the capping position. The synthesis of tantalum borylene complex [(μ3-BH)(Cp*TaCO)2 (μ-CO){Fe(CO)3}] (7) was achieved by the reaction of [(Cp*Ta)2B4H8 (μ-BH4)] at ambient temperature with [Fe2 (CO)9]. Compounds 2–7 have been isolated in modest yield as yellow to red crystalline solids. All the new compounds have been characterized in solution by mass spectrometry; IR spectroscopy; and 1H, 11B, and 13C NMR spectroscopy and the structural types were unequivocally established by crystallographic analysis of 2–6.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to John Wiley & Sons, Inc. |
Keywords: | Borylenes; Manganese; Metallaboranes; Ruthenium; Tantalum |
ID Code: | 108765 |
Deposited On: | 31 Jan 2018 11:54 |
Last Modified: | 31 Jan 2018 11:54 |
Repository Staff Only: item control page