Minseok Oh

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Storage conditions: Store in a cool, dry place. Keep container closed when not in use.

1H NMR should not look significantly different since the cation stays the same in the metathesis. You will not see Br in the NMR, it is better to check with silver nitrate solution for the absence of Bromide (or by using ion chromatography for example). Water is usually needed anyways to remove the LiBr from the mixture, in this specific case wet starting materials are ok but you need to make sure to have an excess of Li[TFSI] (maybe 1.1-1.2 eq) since it is much more difficult to remove excess [BMIM]Br than to remove excess Li[TFSI]. However, in any case, you will have water as impurity in your product - this affects properties a lot and can be difficult to remove, so you should check the water level with karl-fischer titration. you should be able to achieve

Dear Frederik Philippi

I carefully read your valuable response, and I followed the advice to conduct the experiment again, but it was unsuccessful. Therefore, I’ve written a more detailed question based on my experience. I would be truly grateful if you could review it and provide further guidance.

Best regards,

Minseok Oh