SPECTROSCOPIC STUDY ON TRIORGANOTIN ARYLOXYACETATES, AND A LABORATORY EVALUATION OF THE TRI-n-BUTYLTIN ESTERS AS WOOD PRESERVATIVES

Abstract

Four tri-n-butyltin and eight triphenyltin aryloxyacetates were prepared and their structures studied by tin-119m Moessbauer, infrared and nuclear magnetic resonance (tin-119, carbon-13) spectroscopic techniques. The triorganotin aryloxyacetates are carboxylate-bridged, five-coordinated compounds that dissociate into fourcoordinated molecules in chloroform solution. The efficacy of the tri-n-butyltin aryloxyacetates against two basidiomycetes fungi, Pycnoporus sanguineus and Coniophora puteana, was investigated using an accelerated laboratory woodblock test. P. sanguineus was found to be more susceptible than C. puteana and among the test compounds, tri-n-butyltin p-chlorophenoxyacetate was found to have the highest activity which was comparable to that of bis (tri-n butyltin) oxide, an established commercial wood preservative.