Friday, 11 December 2015

organic chemistry - Is 2a¹H-cyclopenta[cd]indene aromatic?


In this question, 2a1H-cyclopenta[cd]indene is said to be aromatic. My doubt is that the central C atom (connecting the three cyclic rings) is sp³ hybridized. So I think it should be non planar thus making compound non aromatic


Can someone please explain this compound’s aromaticity?


2a1H-cyclopenta[cd]indene




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