How can we "draw" a coordination bond (dashed bond) in MOLFILE? I cannot find a bond property or option that would allow me to choose such a thing. So many drawings of organo-metallic compounds (e.g., metal ion and chelator) contain that. How come the MOLFILE format doesn't support such a thing?

I was studying with the book "Modern Quantum Chemistry" of Sazbo and Oustland. In the chapter 2, they talk about unrestrict (UR) determiants. It's explaneid that UR determinants are not eigenfunctions of $S^{2}$, but we can expand them as linear combinations of singlet $|1 \rangle$, doublet $|2 \...

Of course molecular shape and the VSEPR model come up frequently. As discussed previously in a valence bond picture like VSEPR, the lone pair electrons are closer to the atom than bonding pairs, and "fatter." I can think of a few ways of quantifying this, but I'm trying to add more data when disc...