1,5,7,11-Tetraoxaspiro[5.5]undecane, 3,9-Dimethylidene-1,5,7,11-tetraoxaspiro[5.5]undecane and 1,5-Dioxa-7,11-dithiaspiro[5.5]undecane

One-Step Synthesis and Structure of an Oligo(spiro-orthocarbonate)

“…It is worth noting that the hexagonal packing of spiro-chains and the conformation of the six-membered rings (Figure b) in oligo-SOC (Figure a) are respectively coincident to those observed in BPS 4 and molecular oxygen spiro compounds, , lending further support to the structure derived for oligo-SOC.…”

“…The main effect of the presence of stacking faults on the powder pattern is the decrease of the intensity of the 101 line and the appearance of profile asymmetry at high angles. The best agreement with the experimental data is obtained for a 20 ± 5% faulting probability, corresponding to an average of one fault every fifth layer or an average length of 28 Å per oligo-SOC chain, which corresponds to an average of pentameric chains (Figure ) …”

“…The best agreement with the experimental data is obtained for a 20 ( 5% faulting probability, corresponding to an average of one fault every fifth layer or an average length of 28 Å per oligo-SOC chain, which corresponds to an average of pentameric chains (Figure 3). 15 It is worth noting that the hexagonal packing of spiro-chains and the conformation of the six-membered rings (Figure 3b) in oligo-SOC (Figure 3a) are respectively coincident to those observed in BPS 4 and molecular oxygen spiro compounds, 14,15 lending further support to the structure derived for oligo-SOC.…”