The number of paramagnetic complexes among ${\left[ {{\rm{Fe}}{{\rm{F}}_6}} \right]^{3-}},{\left[ {{\rm{Fe}}{{({\rm{CN}})}_6}} \right]^{3-}},{\left[ {{\rm{Mn}}{{({\rm{CN}})}_6}} \right]^{3 - }}$, ${\left[ {{\rm{Co}}{{\left( {{{\rm{C}}_2}{{\rm{O}}_4}} \right)}_3}} \right]^{3-}},{\left[ {{\rm{MnC}}{{\rm{l}}_6}} \right]^{3 - }}$, and ${\left[ {{\rm{Co}}{{\rm{F}}_6}} \right]^{3 - }}$, which involved hybridization is