A silylenoid in organosilicon chemistry is a type of chemical compound with the general structure R2SiXM where R is any organic residue, X a halogen and M a metal.
Silylenoids are the silicon pendants of carbenoid and both compounds have carbene or silylene like properties.
Silylenoids are encountered as reactive intermediates in chemical reactions.
X-ray diffraction shows that the Si-F bond with 170 pm is longer than usual for fluorosilanes.
When the silylenoid is irradiated or heated a disilene forms probably via a silylene intermediate.