[Frank Ose]

Hello,everyone，

For example,sigma bond is the head－to－head overlapping of two electrons ， pi bond is the side－way overlapping of electrons, how about dative bond? Is it the head－to－head overlapping of 2Pz orbital of oxygen and 1s orbital of C？

For your information， there are two normal covalent bond and one dative bond between CO．

[Mitch]

The $$ P_z /$$ orbitals in $$ CO /$$ contain a lone pair, they are not involved in dative bonding with itself. If you're assuming the z-axis is along the highest symmetric axis.