each of m and n is a number independently selected from zero to four, inclusive; wherein X is one or more groups attachable at one or more of the 5-, 6- and 7-ring positions of the imidazo[1,2-a]pyrimidine ring system; wherein each X and T is independently selected from hydrido, halo, alkyl, cycloalkyl, cycloalkylalkyl, haloalkyl, alkenyl having two to about twenty carbon atoms and having one car