Thermal analysis of boron complexes containing ligands of the type R-C(CH2OH)3

The thermal behaviours of certain salts of the complex “ethriol-” and “methriolboric” acids have been investigated by means of Derivatograph and IR spectra. It is shown that compounds of this type decompose in three main stages on heating: 1) the crystallization water is lost, 2) the condensation water is lost and dimers are formed containing bridge bonds B₄-O-B₄; 3) up to 600–700? all the organic matter is lost; the residue is the corresponding borate (1 ∶ 1). The possibility of performing a fast full analysis by means of the TG and DTG curves has been demonstrated.