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Vanadium (β-(Dimethylamino)ethyl)cyclopentadienyl Complexes with Diphenylacetylene Ligands

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Version 2 2016-06-03, 23:48
Version 1 2016-02-27, 13:02
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posted on 2008-05-26, 00:00 authored by Guohua Liu, Xiaoquan Lu, Marcella Gagliardo, Dirk J. Beetstra, Auke Meetsma, Bart Hessen
Reduction of the V(III) (β-(dimethylamino)ethyl)cyclopentadienyl dichloride complex [η51-C5H4(CH2)2NMe2]VCl2(PMe3) (1) with 1 equiv of Na/Hg yielded the V(II) dimer {[η51-C5H4(CH2)2NMe2]V(μ-Cl)}2 (2). This compound reacted with diphenylacetylene in THF to give the V(II) alkyne adduct [η51-C5H4(CH2)2NMe2]VCl(η2-PhCCPh) (3). Further reduction of 2 with Mg in the presence of diphenylacetylene resulted in oxidative coupling of two diphenylacetylene groups to yield the diamagnetic, formally V(V), bent metallacyclopentatriene complex [η51-C5H4(CH2)2NMe2]V(C4Ph4) (4).

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