The mechanism for this reaction involves the following steps: Diethyl malonate reacts with ethoxide ion to form enolate anion 1; 3-Hexene reacts with a peroxyacid to form epoxide 2; Enolate anion 1 reacts with epoxide 2 to form malonate alkoxide 3; Malonate alkoxide 3 reacts to form tetrahedral intermediate 4; Tetrahedral intermediate 4 collapses to form lactone 5; Lactone 5 reacts with aqueous base to form carboxylate 6; Carboxylate 6 reacts with aqueous acid to form the final product. Work out the mechanism on a separate sheet of paper, and then draw the structure of carboxylate 6.

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

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tony (lordcaos066)

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".