Four atoms of it condense together two esters to form an acyloin (uh-SILL-uh-win).
Metallocenes can be synthesized by reacting a cycloÂ·pentaÂ·diene sandwich complex of this element with a metal halide. Four atoms of it condense together two esters to form an acyloin (uh-SILL-uh-win). In a coupling discovered in 1855, adding this element dimerizes ("DIE"-mer-"eyes"-es) alkyl halides. Speciɤc rotations in polarimetry ("polar"-IH-meh-tree) are measured at an emission wavelength for this element, whose boroÂ·hydride reduces ketones but not carboxylic acids. This element is usually the metal in dissolving metal reductions, when it turns an alkyne to a trans-alkene. When dissolved in ammonia, it removes one double bond from benzene in the Birch reduction. In a ̘ame test, this element shows its bright yellow D line. Hard soap saponiɤcation uses lye, which is this metal's hydroxide. For 10 points, name this alkali metal found in table salt.
Metallocenes can be synthesized by reacting a cycloÂ·pentaÂ·diene sandwich complex of this element with a metal halide.
sodium [or Na]