Synthesis and characterization of aluminum ethyl-(S)-lactate complexes and VT NMR studies of [Bu2iAl((S)-(-)-μ2-OC(H)(Me)C(O)OEt))] 2

Bao Tsan Ko, Fa Cherng Wang, Yih Lu Sun, Chia Her Lin, Chu Chieh Lin*, Chen Yuan Kuo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The reactions of ethyl-(S)-(-)-lactate with R3Al in diethyl ether yield the pentacoordinated complexes [R2Al((S)-(-)-μ2-OC(H)(Me)C(O)OEt))]2 (1: R=Me; 2: R=Et; 3: R=Bui). These compounds have been characterized by spectroscopic studies as wells as crystallographic method. These structures show dimeric features containing unusual 5.4.5-fused rings with an Al2O2 core and the ester group bonded to Al through the CO. VT NMR studies of compound 3 suggest that the weak (CO)→M dative bond may undergo dissociation in solution, giving rise to the equilibrium with a four-coordinate species among two five-coordinate species at ambient temperature.

Original languageEnglish
Pages (from-to)4257-4264
Number of pages8
JournalPolyhedron
Volume17
Issue number23-24
DOIs
Publication statusPublished - 1998 Nov 13
Externally publishedYes

Keywords

  • Alkoxide
  • Aluminum
  • Ethyl-(S)-lactate
  • Fluxional

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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