Multiple choice Which of the following complex species involves d2 sp3 hybridization? [COF6]3- [CO (NH3)6]3+ [Fe (CN)6]3- [Cr (NH3)6]3+ Reveal answer Fill a bubble to check yourself C Correct answer Explanation [Fe(CN)6]3- involves a strong field ligand (CN-), which causes pairing of electrons, resulting in d2sp3 hybridization.