This element is used as a treatment for bipolar disorder.
Â­crownÂ­4 is an ionophore developed to chelate this element in nonpolar solvents. The hexamethyl∙disilazide salt of this element is often used as a nonÂ­nucleophilic base to generate enolates. The Schlosser modification allows EÂ­alkenes to be generated from the Wittig reaction instead of the predominant ZÂ­product through the use of strongly basic salts with this element as a counterion. HardÂ­soft acidÂ­base theory successfully predicts the unusuallyÂ­low solubility of this element's fluoride salt; that is because of this elemental ion's high (*) charge density. This element is the only member of its group to react in a nitrogenatmosphere to generate its nitride. Carboxylic acid derivatives are often reduced using the aluminium hydride salt of this element. A very basic organic reagent, which must be stored in tetrahydrofuran, is formed when the butyl group is bonded to this element. This element is used as a treatment for bipolar disorder. For 10 points, name this lightest alkali metal.
Â­crownÂ­4 is an ionophore developed to chelate this element in nonpolar solvents.
lithium [or Li]