Department of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania.
NMR Laboratory, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania.
Molecules. 2022 Dec 5;27(23):8563. doi: 10.3390/molecules27238563.
The specific features of the siloxane bond unify the compounds based on it into a class with its own chemistry and unique combinations of chemical and physical properties. An illustration of their chemical peculiarity is the behavior of 1,3-bis(2-aminoethylaminomethyl)tetramethyldisiloxane (AEAMDS) in the reaction with carbonyl compounds and metal salts, by which we obtain the metal complexes of the corresponding Schiff bases formed in situ. Depending on the reaction conditions, the fragmentation of this compound takes place at the siloxane bond, but, in most cases, it is in the organic moieties in the position with respect to the silicon atom. The main compounds that were formed based on the moieties resulting from the splitting of this diamine were isolated and characterized from a structural point of view. Depending on the presence or not of the metal salt in the reaction mixture, these are metal complexes with organic ligands (either dangling or not dangling silanol tails), or organic compounds. Through theoretical calculations, electrons that appear in the structure of the siloxane bond in different contexts and that lead to such fragmentations have been assessed.
硅氧烷键的特定性质将基于其的化合物统一为一类，具有自己的化学性质和独特的化学和物理性质组合。其化学特性的一个例子是 1,3-双(2-氨乙基氨甲基)四甲基二硅氧烷 (AEAMDS) 在与羰基化合物和金属盐反应中的行为，通过该反应我们获得了相应的席夫碱金属配合物原位形成。根据反应条件，该化合物在硅氧烷键处发生断链，但在大多数情况下，它是在与硅原子相邻的有机部分的 位置处发生断链。基于该二胺分裂得到的部分，形成了主要化合物，并从结构角度对其进行了分离和表征。根据反应混合物中是否存在金属盐，这些化合物是具有有机配体的金属配合物（要么是悬挂的，要么不是悬挂的硅醇尾），要么是有机化合物。通过理论计算，评估了在不同情况下出现在硅氧烷键结构中的电子，这些电子导致了这种断链。
