![]() ![]() House, in Inorganic Chemistry (Third Edition), 2020 12.4 Organometallic compounds of group IIIA metals 632 The silicone Bu 2 tSi O is not formed. 152 ☌) can be distilled at 210 ☌ without decomposition, and is unaffected by hot, concentrated sulphuric acid, 633 though in the presence of p-toluenesulphonic acid condensation will occur (equation 659). As the size of the organic group increases, the diols become less prone to condensation and di- t-butylsilanediol (m.p. 14 Diisobutylsilanediol has a similar structure but passes through a mesocrystalline stage from 89.5 ☌ to its m.p. These are interconnected within the chain by non-linear four-centre hydrogen bonds, while the chains are connected by weaker hydrogen bonds. 96 ☌) possesses a laminated structure with each layer comprising chains of diol molecules. The IR spectrum supports extensive hydrogen bonding, as do the crystal structures of higher homologues. 81 ☌), or from the dichloride in glass or quartz apparatus acid washed beforehand. It is best prepared by the slow hydrolysis of dimethyldimethoxysilane (b.p. 100–101 ☌) which is highly sensitive to traces of acid and base. Dimethylsilanediol is a crystalline solid (m.p. ![]()
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