Determination desstructures cristallines d'un spirane spirobi-benzoaxasilole et d'un phenylsiliconate。Mesure par spectrometrie RMN de 19 F des vitesses de permutation de coordinat
Spirosilane derivatives have been investigated as fluoride sensors. The reactions between these compounds and different fluoride sources, which resulted in structural alterations, have been monitored and quantified by UV and fluorescence spectroscopy. The high selectivity of these probes for fluoride ions has been demonstrated in either organic or aqueous media.
The SiSi bond of a pentacoordinated disilicate was readily cleaved by treatment with 2,3-dichloro-5,6-dicyano-p-benzoquinone in the presence of sodium carbonate under mild conditions. The bondcleavage did not proceed under the same conditions after conversion of the disilicate into the corresponding monoanionic silylsilicate and neutral disilane by protonation. The difference in the charges of the
在温和条件下,在碳酸钠的存在下,通过用 2,3-二氯-5,6-二氰基-对苯醌处理,五配位二硅酸盐的 SiSi 键很容易断裂。在通过质子化将二硅酸盐转化为相应的单阴离子甲硅烷基硅酸盐和中性乙硅烷后,在相同条件下不发生键断裂。考虑到所有这些化合物在五配位硅原子之间具有键,SiSi 键化合物的电荷差异会影响对氧化剂的反应性,从而导致 SiSi 键断裂。