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Mononuclear tantalum (V) pentalene complexes: synthesis of [Ta n8-C8H4(1,4-SiiPr3)2 X3] (X = CH3, Cl, I) and the X-ray crystal structures of [Ta n8-C8H4(1,4-SiiPr3)2 (CH3)3], [Ta n8-C8H4(1,4-SiiPr3)2 (CH3)2Cl], [Ta n8-C8H4(1,4-SiiPr3)2 (CH3)Cl2] and [Ta n8-C8H4(1,4-SiiPr3)2 I3]
journal contribution
posted on 2023-06-08, 09:22 authored by Geoff Cloke, Peter Hitchcock, Neil Morley-Smith, MC KuchtaThe reaction between [TaMe3Cl2] and the potassium salt of the silylated pentalene dianion [K2{C8H 4(1,4-SiiPr3)2}] gives the ¿8-pentalene complex [Ta{¿8-C8H 4(1,4-SiiPr3)2}(CH3) 3]. The reaction between [TaMe3Cl2] and the potassium salt of the silylated pentalene dianion [K2{C 8H4(1,4-SiiPr3)2}] gives the ¿8-pentalene complex [Ta{¿8-C 8H4(1,4-SiiPr3)2}(CH 3)3] (1). Sequential protonolysis of 1 with [Et 3NH]Cl affords [Ta{¿8-C8H 4(1,4-SiiPr3)2}(CH3) 2Cl] (2), [Ta{¿8-C8H4(1,4- SiiPr3)2}(CH3)Cl2] (3) and [Ta{¿8-C8H4(1,4-SiiPr 3)2}Cl3] (4). An alternative and cleaner route to 4 involves treatment of 1 with BCl3; in an analogous fashion, the reaction of 1 with BI3 gives [Ta{¿8-C 8H4(1,4-SiiPr3)2}I 3] (5). The X-ray crystal structures of 1, 2, 3 and 5 are reported.
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Publication status
- Published
Journal
PolyhedronISSN
02775387External DOI
Issue
17Volume
23Page range
2625-2630Pages
6.0Department affiliated with
- Chemistry Publications
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- No
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- Yes
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2012-02-06Usage metrics
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