Complex sentence: This complex is now known as ferrocene and the group of transition metal dicyclopentadienyl compounds is known as metallocenes and have the general formula (("η" 5-C 5 H 5) 2 M).
Split into simpler sentences: This complex is now known as ferrocene, and the group of transition metal dicyclopentadienyl compounds is known as metallocenes. Metallocenes have the general formula (("η" 5-C 5 H 5) 2 M).