How much detail do you go into when discussing symmetry planes in C4v molecules? There appears to be a semi-consensus that the vertical (σv) planes should contain as many atoms as possible, with the second set of planes (σd) bisecting the first.
But as I discuss in a blog post, this is not required and not always followed, especially if you're using computational chemistry software like Spartan. What do others do? Are you explicit about defining the difference between σv and σd, or do you not go into that much detail?