Complex sentence: The result of molecular binding is sometimes the formation of a molecular complex in which the attractive forces holding the components together are generally non-covalent, and thus are normally energetically weaker than covalent bonds.
Split into simpler sentences: The result of molecular binding is sometimes the formation of a molecular complex. The attractive forces holding the components of such a complex together are generally non-covalent, and thus are normally energetically weaker than covalent bonds.