C12H30OSi2

C12H30OSi2 is the molecular formula of a disiloxane, a class of organosilicon compounds featuring an Si–O–Si linkage with alkyl substituents on silicon. For this formula, the most specific structural interpretation is the symmetrical disiloxane bearing three ethyl groups on each silicon, namely Et3Si–O–SiEt3.

Chemically, this compound belongs to siloxanes, which are defined by strong Si–O bonds and hydrophobic organic substituents. The two silicon atoms are tetrahedrally coordinated, with the oxygen bridging them and three ethyl groups on each silicon. The formula alone does not uniquely determine stereochemistry or every possible isomer; other arrangements with the same formula could exist if different alkyl groups were used.

Synthesis typically proceeds by condensation or dehydration of silanol precursors. A common route involves condensation of two equivalents of triethylsilanol (Et3SiOH) to yield Et3Si–O–SiEt3 and water. Related methods include dehydration of silanols or coupling of silyl chlorides with alkoxides under controlled conditions.

In terms of properties and applications, disiloxanes of this type are usually colorless liquids or oils, largely nonpolar and soluble in organic solvents. They are relatively moisture-sensitive, hydrolyzing to give Et3SiOH upon exposure to water. Such compounds serve as intermediates in silicone chemistry and as precursors in the synthesis of higher-order siloxanes. Safety follows standard guidelines for organosilicon compounds, with potential irritation on skin or eyes and precautions to avoid inhalation of vapors.