Comment on “CO2 as oxidant: an unusual light-assisted catalyst free oxidation of aldehydes to acids under mild conditions” by S. R. Khan, S. Saini, K. Naresh, A. Kumari, V. Aniya, P. K. Khatri, A. Ray and S. L. Jain, Chem. Commun., 2022, 58, 2208

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