Professor Borden, we wrongly attributed to him the ab initio HFJ3-21G calculations of secondary deuterium kinetic isotope effects in the first two complete paragraphs on page 542. As the senior author, M.J.S.D. accepts full responsibility for this error and apologizes unreservedly.

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Scheme 11. Oxidative Cyclization of Unsymmetrical Dienoates and Enantioselective Synthesis of an Ionophore Fragment .. 12 t7 "OMOM 6) Evans Aldol (56%) 1 4 13

The spectroscopic properties, including emission spectra and lifetimes, absorption and diffuse reflectance spectra and excitation spectra, of the hexanuclear copper(1) and silver(1) clusters Cu6(mtc)6 (l), Ag6(mtc) (2), and Ag,(dt~)~ (3) (mtc = di-npropylmonothiocarbamate, dtc = di-n-propyldithiocarbamate) are reported. At room temperature 1 exhibits a strong single emission (e.g., in toluene A=, = 725 nm, T = 1.0 I S ) , while at 77 K each of these is a bright emitter (spectral properties: 1 in toluene,

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