Essentially no hydrogenation of the olefins occur.

These complexes have been found to be extremely active homogeneous olefin polymerization catalysts, as well as catalysts for olefin and acetylene hydrogenation.

A process for the selective hydrodesulfurization of a naphtha containing olefins and organosulfur compounds is disclosed, which minimizes the hydrogenation of the olefins and results in a product with a low sulfur content.

In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition.