Question: why is thf used in grignard?
Answer: THF and Diethyl Ether are both used for Grignard reactions because the Grignard reagent readily forms in them, is soluble in them and do not react with the Grignard reagent. ... The interesting thing about THF as it is more polar and will stabilize metal cations better [ClMg(THF)2–4]+ much better than Diethyl Ether.