Preparation of dry THF

[@almche8978]

MashaAllah. Dr. Please could explain us how can determent atoms for proton and carbon .(assingment) if we have structure example containes two rings with different substituents in different position. How can i know this atom belongs to this value .without using 2D NMR because it is expensive.

[@mohamadnurulazmimohamadtai1308]

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