Short-RInChIKey=SA-FUHFF-UHFFFADPSC-UMMQIWZYOP-UHFFFADPSC-NUHFF-LUHFF-NUHFF-ZZZ

To a solution of TMG2Mequ (25.6 mg, 0.1 mmol, 2 eq.) in MeOH (1 ml) a solution of Cu(MeCN)42 (26.3 mg, 0.05 mmol, 1 eq.) in MeOH (1 mL) was added. The resulting solution became instantly dark green. By slow diffusion of Et2O (approx. 3 mL) the complex Cu(TMG2Mequ)22 crystallized within a few days as dark green crystals. The yield was not determined because the crystals had to be stored in the mother liquor to protect them to perform the single-crystal X-ray diffraction measurement.