Mono- and bis-amidinate 2,6-xylylimido vanadium chlorides: Synthesis, structure, and reactivity

Sinai Aharonovich*, Mark Botoshansky, Boris Tumanskii, Kotohiro Nomura, Robert M. Waymouth, Moris S. Eisen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Salt metathesis of (2,6-xylylimido) vanadium trichloride (1) with the unsolvated or the TMEDA lithium p-Et benzamidinate complexes (2 and 3, respectively, in 1:2 V:Li molar ratio) yields bis[N,N'-bis(trimethylsilyl) p-Et benzamidinate](2,6-xylylimido)VCl (4) as dark brown, diamond-shaped crystals. When equimolar amounts of complexes 1 and 2 are reacted, a mixture of the bis (4) and mono (5) imidovanadium amidinates results. A similar mixture is also obtained by a ligand metathesis reaction of the bis amidinate complex 4 and complex 1. When the synthesis of the mono amidinate 5 is attempted with the TMEDA lithium amidinate complexes 3 or the 3-pyridyl derivative (7) (in 1:1 V:Li molar ratio) a redox reaction takes place to produce (κ2- TMEDA)(2,6-xylylimido)VIVCl2 (6) as crystalline, mustard-yellow plates. The activity of complex 4 in ethylene polymerization was negligible with MAO or MAO\(CPh3)+[B(C6F 5)4]- as co-catalysts.

Original languageEnglish
Pages (from-to)5643-5649
Number of pages7
JournalDalton Transactions
Issue number24
StatePublished - 2010
Externally publishedYes


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