1,1,3,3-Tetramethyl-1,3-divinyldisiloxane (also referred to as tetramethyldivinyldisiloxane) is the organosilicon compound with the formula O(SiMe2CH=CH2)2.

Tetramethyldivinyldisiloxane is a colorless liquid that is employed as a ligand in organometallic chemistry and also as a homogeneous catalyst.

[1] The ligand is a component of Karstedt's catalyst.

It was first prepared by hydrolysis of vinyldimethylmethoxysilane, (CH2=CH)Me2SiOMe.

[2]