Our research focuses on forming covalent bonds between carbons of adjacent olefins through 2+2 photo-dimerizations in the solid state. Our method relies on templates that are hydrogen bonded to the olefins and position the olefins properly for the photoreaction to occur. The yield of the dimerized products can be affected by the nature of the templates used. Yields can be increased by using different templates, a strategy called template switching. We have synthesized 4-iodo-1,2-bis(4-methylenethiopyridyl) benzene in an attempt to increase the yield of the photodimerization of fumaric acid and to enlarge our library of hydrogen bond acceptor templates. In this poster, we will describe the single crystal structure of 4-iodo-1,2-bis(4-methylenethiopyridyl) benzene. In the absence of an olefin, the 4-iodo-1,2-bis(4-methylenethiopyridyl) benzene adopts a conformation in which the 4-pyridyl groups lie splayed from each other.