STRUCTURES AND STABILITIES OF ALPHA-HETERO-SUBSTITUTED ORGANO-LITHIUM AND ORGANOSODIUM COMPOUNDS - ENERGETIC UNIMPORTANCE OF 2ND-ROW D-ORBITAL EFFECTS - Schleyer, Paul; Clark, Timothy; Kos, Alex; Spitznagel, Günther W.; et al. (Journal of the American Chemical Society, 1984)