1. A precatalyst having the structure of Formula (I):
M is a lanthanide or a transition metal; and
Alk is C1-6 alkyl,
wherein the lanthanide metal is selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm,
and Yb; and
wherein the transition metal is selected from the group consisting of Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Y, Zr, Nb, Mo, Tc,
Ru, Rh, Pd, Ag, Cd, La, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Ac, Rf, and Ha; and
wherein if Alk is Me, then M is not Y, La, Ce, or Pr.