Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

The ABH_nD_4-n complex hydrides (A = alkali metal, B = the IIIB Group atom, n = number of hydride atoms and D = ligand) were classified as stable or unstable ones by a pattern - recognition method. The method is based on a measure of similarity which is represented by the ratio of squared distance of the object from the centre of the class and the averaged squared distance of this centre from all prototypes in the class. The distances are measured in transformed and normalized spaces for each class, the individual class approaching a hypercube with an edge length (standard deviation) of one. The results are directly compared with those previously obtained by SIMCA principal components method using the same data base (MODEL-1).