[sumedh]

Why cyclopentadienyl anion ia aromatic in spite of presence of sp3 hybid carbon in the ring(negative charge bearing carbon which is a carbanion)?
Similarly in case of pyrrole nitrogen is sp3 hybrid still the ring is taken to aromatic why?
Do we assume them to be sp2 hybrid? why?
i am very confused

[nj_bartel]

If there is a lone pair present on what appears to be an sp3 atom, it generally hybridizes itself to sp2, positioning the lone pair in the p orbital to gain aromaticity.