Wood Protection Properties of Quaternary Ammonium Spiroborate Esters Derived from Alkyl Tartrates †
Jenny M. Carr A D , Peter J. Duggan A G , David G. Humphrey A E , James A. Platts B and Edward M. Tyndall C FA CSIRO Materials Science and Engineering, Private Bag 10, Clayton South, Vic. 3169, Australia.
B School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK.
C Centre for Green Chemistry, Monash University, Clayton, Vic. 3800, Australia.
D Present address: Australian Forest Research Company Pty Ltd, 12 Wilton Crescent, Wheelers Hill, Vic. 3150, Australia.
E Present address: Arch Wood Protection (Aust.) Pty Ltd, Unit 3, Aerolink Business Park, 85–91 Keilor Park Drive, Tullamarine, Vic. 3043, Australia.
F Present address: Biota Holdings Ltd, 10/585 Blackburn Road, Notting Hill, Vic. 3168, Australia.
G Corresponding author. Email: peter.duggan@csiro.au
Australian Journal of Chemistry 64(4) 495-502 https://doi.org/10.1071/CH11022
Submitted: 13 January 2011 Accepted: 8 February 2011 Published: 18 April 2011
Abstract
Four new tetra-n-butylammonium spiroborates derived from dimethyl, diethyl, di-iso-propyl and di-n-butyl esters of l-tartaric acid have been prepared and their potential as environmentally benign wood protectants investigated. These compounds showed good activity in a no-choice cellulose paper bioassay with Coptotermes acinaciformis termites. The hydrolytic stability of these spiroborates is not high relative to other spiroborates, yet the tetra-n-butylammonium spiroborate derived from di-iso-propyl-l-tartrate showed remarkable permanence in timber in a demanding leaching test.
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