Our emerging interest in heavier alkali metals is intended to facilitate applications in organic synthesis via a combination of structural and mechanistic studies and the development of strong bases with useful properties. We began what was intended at the outset to be a limited two-part study of organopotassium chemistry. The first stage focused on evaluating the solvent-dependent solution structure of potassium hexamethyldisilazide (KHMDS), the pre-eminent potassium amide used in synthesis. We exploited the Method of Continuous Variation (MCV) to determine the aggregation state in limited cases. 15 N-29 Si coupling and 29 Si chemical shifts in [ 15 N]KHMDS 3 that had proved diagnostic of aggregation states in sodium hexamethyldisilazide ([ 15 N]NaHMDS) 2b proved invaluable. We also discovered, however, that dynamic chemical exchanges created technical challenges beyond those observed for NaHMDS. In this second part, we describe the preparation, physical properties, spectroscopic studies, and reactivities of potentially useful silylated potassium amide bases-potassium isopropyl(trimethylsilyl)amide (KPTA, 1) and potassium tert-butyl(trimethylsilyl)amide (KBTA, 2). Although KPTA and KBTA were known, they have little presence in organic chemistry and no presence in the synthetic organic chemistry literature. Studies of KPTA are a logical extension of the structure and reactivity studies of sodium isopropyl(trimethylsilyl)amide (NaPTA) 2c that has shown physical properties that rival those of lithium diisopropylamide (LDA). KBTA shows a higher reactivity than KPTA as one might expect from analogy with hindered lithium amides. 7