text: Spiro compounds (compounds with a twisted structure of two or more rings) can have inherent chirality at the spiroatom, due to the twisting of the achiral ring system.
  Inherently chiral alkenes have been synthesized through the use of a "buckle" where in an achiral, linear alkene is forced into a chiral conformation.  Alkenes have no classical chirality, so generally, an external stereogenic center must be introduced.  However, by locking the alkene into a conformation through the use of an achiral buckle allows for the creation of an inherently chiral alkene.  Inherently chiral alkenes have been synthesized through the use of dialkoxysilanes, with a large enough racemization barrier that enantiomers have been isolated.