Figure displays the MALDI-TOF spectrum in CH₂Cl₂ for a (PI)₂TiCl₄ complex exposed to air and daylight over three weeks, highlighting mostly organic products. These products and their identities are discussed in detail. The relative concentrations of these materials are represented by the relative peak intensities in the MALDI-TOF spectrum, summarized in Table . The identification of each organotitanium catalytic intermediate was addressed in our previous publication 1 , which includes