847499-98-3Relevant academic research and scientific papers
Substituent effects on isocyanate insertion into a lanthanide-sulfur bond. unexpected construction of a coordinated thiazolate ring
Zhang, Jie,Ma, Liping,Cai, Ruifang,Weng, Linhong,Zhou, Xigeng
, p. 738 - 742 (2005)
[Cp2Yb(o-H2NC6H4S)] 2·2THF (1) and Cp2Yb(p-H2NC 6H4S)(THF) (2) were prepared in good yields by the protonolysis of Cp3Yb with the corresponding amino-substituted thiophenol in THF at room temperature, respectively. Treatment of [Cp 2Yb(o-H2NC6H4S)]2· 2THF (1) with PhNCO gives the unexpected intermolecular addition/cyclization/ elimination product [(C5H5)2- Yb(μ-η1:η3-OSNC7H4)] 2 (3), while Cp2Yb(p-H2NC6H 4S)(THF) (2) reacts with PhNCO under the same conditions to form the simple insertion product {Cp2Yb[μ-η1: η3-OC(p-H2NC6H4S)NPh]} 2·2THF (4), demonstrating that the neighboring NH2 group participation could lead to unique isocyanate insertion reactivity. The structures of all the complexes were confirmed by X-ray single-crystal diffraction analysis, indicating that complexes 1 and 4 have an unusual intermolecular hydrogen bond interaction involving THF, and a novel intramolecular π-π weak interaction between aromatic rings is also observed in 4.
