The nitrogen is more electronegative than our hydrogen, and so it will pull the electron density closer, developing a partial negative charge. It will take away the electrons from H, and the H will develop a partial positive charge. And so this is another example of an electric dipole moment, a polar Covalent bond. So the electric dipole moment here will point in this direction. Now, the final type of intramlecular bond that is not found in this guanine molecule is an ionic bond. And one example of an ionic bond is in a sodium chloride molecule.