Reactions of α-diimine-stabilized Zn-Zn-bonded compounds with phenylacetylene

Jing Gao, Shaoguang Li, Yanxia Zhao, Biao Wu, Xiao Juan Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Treatment of the Zn-Zn-bonded compounds [L 2-Zn-ZnL 2-]· [M(THF) 2] 2 (1a, M = Na; 1b, M = K; L = [(2,6-iPr 2C 6H 3)NC(Me)] 2), which contain doubly reduced α-diimine ligands, with 15-crown-5 and 18-crown-6 led to the ion-separated compounds [L 2-Zn-ZnL 2-]· [Na(15-crown-5)(THF) 2] 2 (2a), [L 2-Zn-ZnL 2-]· [K(15-crown-5) 2] 2·4THF (2b), and [L 2-Zn-ZnL 2-]· [K(18-crown-6)(THF) 2] 2·2THF (2c). In the products, the alkali metal ions originally bound by the ligands have been captured by the crown ethers. The Zn-Zn bond distances in 2a, 2b, and 2c are longer than those in the corresponding parent compounds 1a and 1b and in an analogous compound, [L -Zn-ZnL -] (3), bearing the monoanionic α-diimine ligands. Theoretical computations suggested that the Zn-Zn bonds in 2a-c are less stable than those in 1a and 1b. Reactions of [L -Zn-ZnL -] (3) with different amounts of PhC≡CH afforded the dimeric product [L -Zn(ν-C≡CPh)] 2 (4) and the monomeric [L 0Zn(C≡CPh) 2]·2THF (5), respectively, while the reaction of the crown ether-containing compound 2b with PhC≡CH gave a homoleptic zinc alkynide, [Zn(C≡CPh) 4]·[K(15-crown-5) 2] 2·THF (6).

Original languageEnglish
Pages (from-to)2978-2985
Number of pages8
JournalOrganometallics
Volume31
Issue number8
DOIs
Publication statusPublished - 23 Apr 2012
Externally publishedYes

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