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Synthesis of 4-Methyltriphenylcarbinol: 3.2 g (130.7 mmol, 1.1 eq) of magnesium and 0.1 g (0.8 mmol) of iodine were suspended in an hydrous diethyl ether under argon atmosphere at reflux temperature. A solution of 20.0 g (116.95 mmol, 1 eq) of p-bromotoluene in 45 mL of diethyl ether was slowly added and constantly stirred for 30 minutes. After 2 hours, a solution of 20.8 g (114.2 mmol, 0.98 eq) of benzophenone in 100 mL of diethyl ether was added drop by drop to the reaction mixture and it was refluxed for 1 hour. The reddish solution was constantly stirred for 18 hours. Then, the reaction mixture was poured over an ice bath (50 g of ice) previously acidified with 2.5 mL of sulfuric acid 2 M, and it was extracted with diethyl ether. The organic phase was washed with sodium bicarbonate (5% p/v) and water. Then, it was dried over anhydrous mag nesium sulfate and filtrated. The solvent was eliminated under vacuum. The yellow solid obtained was crystallized with a mixture of hexane and dichloromethane (3/1) and the desired compound was obtained (13 g, 41%)^[1].

[1] Vega Lloveras. (2019). Redox-Active PTM Radical Dendrimers as Promising Multifunctional Molecular Switches. Chemistry of Materials, 31 22, 9400–9412. https://doi.org/10.1021/acs.chemmater.9b03015