Metal salt in ether? I should have known better!!
Today I was preparing for a reaction that requires the use of Rieke's Zinc, so since this morning I have been preping for it. First you flame dry your flask a few times and then you add your usual lithium and naphthalene then THF to make lithium naphthalite (this is a cool reaction). After you let the reaction stir at room temp. for 2 hours or until lithium completely dissolved (this is hard to see since the mixture is in dark dark green colour) you then add your zinc salt. In the paper where I got the procedure from they said to add zinc bromide in 1M ether solution to the lithium naphthlite solution. At first I thought, hmmm metal salt in ether interesting... so I blindly went along with it. Zinc bromide turned out to be as soluble in ether as my freaking toilet paper in water, I sonicated it, heat it, but it would not go completely into solution. I then realize I have committed one of the cardinal sin of being an organic grad student- I trusted the paper too much. I somehow had forgotten all those times when I do not even remotely get the result "suggested" in the papers. My own knowledge told me metal salts don't dissolve in ether that well, THF is a better solvent. I was right, zinc bromide dissolved up in THF faster than I can say Horshit, problem solved. Lesson of the day, ALWAYS trust your own knowledge.