I'm trying to understand molecular symmetry and I got confused reading the Molpro documentation.
There is an example of a system with $B_2$ symmetry written like this:
$$ wf,10,3,0, $$
which means, that the system has 10 electrons, $B_2$ symmetry and the total spin number is 0.
If I understard the total spin number well, it is 0 only when all electrons are paired in the orbitals (i.e. the system is in singlet state).
But, on the other hand, I thought, that when the electrons are paired, then the orbital is "totally symmetric", i.e. $(\cdot)^2 = A / A_g / A_1$.
So, as far as I understand it, $B_2$ symmetry and total spin number 0 is mutually exclusive.
Is it true or do I understand it wrong? If I do, could you, please, explain my mistake and provide some simple example of the abovementioned configuration?