Fails to predict the shapes of isoelectronic species, that is, molecules and ions having the same number of valence electrons. These species may vary in shape despite having the same number of valence electrons. Fails to explain the structures containing transitional elements in their different oxida...
In fact, the PO3F2− anion is isoelectronic with the SO42− anion, and both anions have a tetrahedral shape, as later evidenced by the very first structure determination of a monofluorophosphate [6]. Prior to this first experimental proof about the structure and shape of the PO3F2−...
In this case, there are three bonding orbitals occupied and no antibonding orbitals occupied, giving a bond order of three. Due to this, CO is a very stable 10-valence electron molecule, isoelectronic with CN−, NO+ and with N2. Occupied nonbonding orbitals on the carbon and on the ...