The SO 2 molecule has unshared pairs of electrons on both the sulfur and oxygen atoms. As a result,
it forms numerous complexes with transitions metals in which it is known to attach in several ways.
These include bonding through the sulfur atom, through an oxygen atom, by both oxygen atoms, and
various bridging schemes. In most cases, the complexes involve soft metals in low oxidation states.
Another important reaction of sulfur dioxide is known as the insertion reaction, in which it is placed