Table 1: 29Si NMR chemical shift of laddersiloxanes.

Compounds 29Si NMR chemical shift/ppm

syn-Tricyclic laddersiloxane [4, 5]−67.2
anti-Tricyclic laddersiloxane [4, 5]−66.8
All anti-Pentacyclic laddersiloxane [7]−65.8, −65.2
anti-syn-syn-Pentacyclic laddersiloxane [6]−66.5, −65.9
Heptacyclic laddersiloxane (isomeric mixture) 3 [8]−66.2 to −64.9
Nonacyclic ladder silsesquioxanes (isomeric mixture) 6−66.5 to −65.5
Methyl ladder polysilsesquioxane (solid state) [9]−64.5