The results are shown in Figure . The strength of the association between solvents and reaction products depends on the distance from the origin (where the dotted lines cross) and on the angle between the vectors from the origin to the points representing the solvents and products. As in PCA, the association of DMF and propylene carbonate with high amounts of the phenanthridinone product 2a can be seen, but here acetanilide 17a is associated with propylene carbonate, whilst 5a and aniline 16a are associated with DMF. Furthermore, 6a is associated with both propylene carbonate and, to a lesser extent, DMF.