. . "branched, saturated or unsaturated, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms either may or may not be present in either the aryl or the alkyl portion of the alkylaryl group, provided that the total number of carbon atoms and heteroatoms, excluding atoms in any substituents, in R1+R2+R3 is at least about 18, M is a metal atom, each A, each E, and each G, indepen" . .