HIGHLIGHTS
SUMMARY
Consequently, both the oxygen basicity and the Si-C bonds are simultaneously weakened, so that p(O) → σ*(Si-R) back-bonding and the ionic contribution largely dictate the structural behavior of siloxanes, more so than in the case of organic ethers. The ab initio calculations on the Si-O-Si bond revealed that (p-d)π bonding is of minor importance, while the ionic character is much higher than that estimated based on the difference between the electronegativities of the two atoms involved. When analyzing other silicon compounds with Si-X bonds, it was found . . .
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