Question

If an octahedral iron(II) complex is diamagnetic, which of the following sets of conditions best describes the complex?
a. low-spin, Delta 0 small
b. low-spin, Delta 0 large
c. high-spin, Delta 0 small
d. high-spin, Delta 0 large
e. none of these

Answer C or D not sure

Answer 1

I don't think the answer is either c or d. If the complex is diamagnetic doesn't that mean all of the electrons are paired. Doesn't that make it low spin. And if they are paired doesn't that make the delta oct difference between t2g and eg large? So I would think b is the right answer.