Synthesis of mononuclear heteroleptic bis(dipyrrinato)zinc(II) complex, Mono-5

A methanol solution (6 ml) of zinc(II) acetate (73.9 mg, 0.40 mmol) was added to a dichloromethane solution (40 ml) of 2-​((2,​6-​dimethylphenyl)​(5-​methyl-​2H-​pyrrol-​2-​ylidene)​methyl)-​5-​methyl-1H-pyrrole (166.4 mg, 0.60 mmol) and HL4 (113.1 mg, 0.20 mmol). After stirring the reaction mixture overnight, the solvent was evaporated and the residue was purified by GPC to give Mono-5 as a red brown solid (36.6 mg, 20.2%). 1H NMR (500 MHz, CD2Cl2): δ = 7.33 (d, 4H, J = 8.8 Hz), 7.30 (dd, 1H, J = 7.2, 7.2 Hz), 7.25 (dd, 1H, J = 7.6, 7.6 Hz), 7.19 (d, 2H, J = 7.2 Hz), 7.13 (d, 2H, J = 7.9 Hz), 6.82 (d, 4H, J = 9.1 Hz), 6.40 (d, 2H, J = 4.1 Hz), 6.17 (d, 2H, J = 4.1 Hz), 3.79 (s, 6H), 2.18 (s, 6H), 2.18 (s, 6H), 2.17 (s, 6H), 2.14 (s, 6H), 1.44 (s, 6H); 13C NMR (125 MHz, CDCl3): δ = 159.24, 153.55, 140.76, 138.07, 136.31, 135.91, 135.37, 132.61, 128.42, 127.96, 116.22, 114.15, 113.94, 95.51, 82.12, 55.30, 19.60, 15.18, 12.39; HR-ESI-TOF-MS (m/z): [M]+, calculated for C58H54N4O2Zn+, 902.3522; found, 902.3538.

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