What are the unique properties and reactivity of geminal alkenes in organic chemistry?

Geminal alkenes are a type of organic compound with two double bonds on the same carbon atom. They are highly reactive due to the strain caused by the close proximity of the double bonds. This strain makes geminal alkenes prone to undergo reactions such as addition and elimination, leading to the formation of various products. Additionally, geminal alkenes exhibit unique properties such as increased reactivity towards electrophiles compared to other alkenes.