Synthesis and structural characterization of group 5 dimetallaheteroboranes

Shankhari, Pritam ; Roy, Dipak Kumar ; Geetharani, K. ; Anju, R. S. ; Varghese, Babu ; Ghosh, Sundargopal (2013) Synthesis and structural characterization of group 5 dimetallaheteroboranes Journal of Organometallic Chemistry, 747 . pp. 249-253. ISSN 0022-328X

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Treatment of group 5 metal polychlorides such as [CpnMCl4−x] (M = Nb: n = 1, x = 0; M = V: n, x = 2), (Cp = η5−C5H5) with [LiBH4·THF] followed by thermolysis in presence of diphenyl dichalcogenide ligands, E2Ph2 (E = Se or Te) yielded dimetallaheteroborane clusters [(CpNb)2BH(Se)4], 1 and [(CpV)2B3H93-Te)], 2 in modest yields. Compound 1 can be considered as an edge fused cluster in which a trigonal bipyramidal unit [Nb2Se2B] has been fused with a tetrahedral core [Nb2Se2] by means of a common [Nb2] edge. Compound 2 can be described as a dimetallaheteroborane built from two edge-fused V2B2 tetrahedra, in which one of the BH3 units is replaced by an isoelectronic Te ligand. All the compounds have been characterized by mass spectrometry, 1H, 11B, 13C, 51V and 77Se NMR spectroscopy. In addition the geometry of compound 1 has been established by crystallographic analysis.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Chalcogen; Metallaboranes; Selenium; Tellurium; Vanadium
ID Code:108923
Deposited On:31 Jan 2018 12:20
Last Modified:31 Jan 2018 12:20

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