Wydział Chemii

S. Szumacher

I. Madura

Janusz Zachara

A. R. Kunicki

A. Cebulski

Lucjan B. Jerzykiewicz

2003

Journal of Organometallic Chemistry

669

64-71

10.1016/S0022-328X(02)02218-0

Naukowa

Angielski

Artykuł

The dicyclopentadienylaluminium alkoxides of general formula [Cp₂Al-μ-OR]₂ where R=Me, Et, n-Bu, i-Bu, CH₂t-Bu, s-Bu, CH₂Ph, C₆H₄-4-t-Bu (1–8) were prepared by reacting CpNa with ROAlCl₂ at the molar ratio 2:1, respectively (2–8) or from the reaction of Cp₃Al with alcohol (1). The compounds were characterised by multinuclear NMR (¹H, ¹³C, ²⁷Al) method. The molecular structures of compounds 2, 5 and 6 were determined by X-ray crystallography. The Cp–Al bonding mode in dicyclopentadienylaluminium alkoxides regarding the steric demands of alkoxy groups is discussed based on ²⁷Al-NMR chemical shifts and structural data obtained. The meaningful correlation between Cp ring-slippage and ²⁷Al-NMR chemical shifts was observed.The dicyclopentadienylaluminium alkoxides of general formula [Cp₂Al-μ-OR]₂ where R=Me, Et, nBu, iBu, CH₂tBu, sBu, CH₂Ph, C₆H₄-4-tBu (1–8) were synthesised and structurally characterised by multinuclear NMR and compounds 2, 5, 6 by X-ray crystallography as well. The analysis of Cp–Al bond mode in dicyclopentadienylaluminium alkoxides regarding the steric demands of alkoxy groups was presented and the meaningful correlation between Cp ring-slippage and ²⁷Al-NMR chemical shifts was observed.

Alkoxy ligands, X-ray crystallography, Cp–Al bond mode

https://doi.org/10.1016/S0022-328X(02)02218-0

http://www.elsevier.com