학술논문
Mixed sandwich thorium complexes incorporating bis(tri-isopropylsilyl)cyclooctatetraenyl and pentamethylcyclopentadienyl ligands: synthesis, structure and reactivity.
Document Type
Article
Source
Subject
*CHEMICAL synthesis
*REACTIVITY (Chemistry)
*THORIUM
*CYCLOOCTATETRAENES
*HALIDES
*CARBOXYLATES
*OXALATES
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Language
ISSN
1477-9226
Abstract
The Th(iv) mixed-sandwich halide complexes Th(COTTIPS2)Cp*X (where COTTIPS2 = 1,4-{SiiPr3}2C8H6, X = Cl, I) have been synthesised, and structurally characterised. When Th(COTTIPS2)Cp*I is reduced in situ in the presence of CO2, a mixture of dimeric carboxylate and oxalate complexes {Th(COTTIPS2)Cp*}2(μ-κ1:κ2-CO3) and {Th(COTTIPS2)Cp*}2(μ-κ2:κ2-C2O4) are formed, possibly via a transient Th(iii) species. Th(COTTIPS2)Cp*Cl is readily alkylated to yield the benzyl complex Th(COTTIPS2)Cp*CH2Ph, which reacts with CO2 to form a carboxylate and with H2 to form a hydride; the latter inserts CO2, giving the bridging formate complex {Th(COTTIPS2)Cp*(μ-κ1:κ1-O2CH)}2. [ABSTRACT FROM AUTHOR]