GROWTH-PATTERNS OF CHLOROSILOXANES

The growth pattern of chlorosiloxanes SinOn'Clm was studied with respe ct to increasing, decreasing and constant ratio of n'/n. The relative stability of isomers was determined with the SINDO1 method. The calcul ations allow us to draw conclusions about stabilities of chains, monoc yclic and oligocyclic molecules and the preferable ring sizes. Special attention is given to the cage structures of silsesquioxanes with n'/ n = 1.5 and n = m. It is possible to explain experimental data from ma ss spectra of mixtures of chlorosiloxane compounds with more than 100 atoms. (C) 1997 Elsevier Science B.V.