Here is the review that appeared in Chemical review published by American Chemical Society based on pentafulvenes and its reactivity in 2017. This publication I wrote is informative and easy to understand. It helped synthetic organic chemist to gain an in-depth understanding of the nature of the pentafulvenes. This is a well organized and comprehensive survey of all the aspects of pentafulvene up to 2017. I am excited about this review, and I am happy about the citations.