SiOSisidoksia
SiOSisidoksia, or Si–O–Si bonds, are covalent bridges that connect two silicon atoms through a shared oxygen atom. They are a defining feature of silicate and siloxane structures, enabling a wide range of inorganic and organic-inorganic materials. Silicon typically resides in a tetrahedral coordination with oxygen (SiO4), and two silicon centers can be linked by a single oxygen to form a Si–O–Si linkage. These bridges are commonly formed by the condensation of silanol groups (Si–OH), a reaction that releases water, and they can also be cleaved by hydrolysis.
In minerals, networks of SiO4 tetrahedra linked by Si–O–Si bridges create robust, three-dimensional frameworks, as seen
Analytical and practical aspects: Si–O–Si vibrations appear in infrared spectroscopy around 1000–1100 cm⁻¹, and 29Si NMR