ZnCl2 represents another alternative and it is often used in synthetic organic chemistry as a milder analog to AlCl3 in reactions, such as the Friedel-Crafts methods. In analogy to Al, we also considered the use of the commercially available ZnEt2. Due to the weaker coordination to Zn, no special ligands were assumed, but rather the precursors were studied primarily in the state of saturation (coordination number 4) by THF -the aprotic solvent of choice to dissolve both ZnCl2 and CUBE.