Larry S. Helmick

Anionic .sigma. complexes between amide ions and the diazines in liquid ammonia

Zoltewicz. John A., Larry S. Helmick · Journal of the American Chemical Society · 1972 · 63 citations

Natural Sciences, Chemistry, Analytical Chemistry +7

Base-catalyzed hydrogen-deuterium exchange of N-substituted pyridinium ions. Inductive effects and internal return

John A. Zoltewicz, Larry S. Helmick · Journal of the American Chemical Society · 1970 · 48 citations

Natural Sciences, Chemistry, Catalysis +10

Addition of amide ion to isoquinoline and quinoline in liquid ammonia. Nuclear magnetic resonance spectra of anionic .sigma. complexes

John A. Zoltewicz, Larry S. Helmick, Terry M. Oestreich et al. · The Journal of Organic Chemistry · 1973 · 41 citations

Natural Sciences, Chemistry, Medicinal Chemistry +8

Covalent amination of heteroaromatic compounds

John A. Zoltewicz, Terence M. Oestreich, J. K. O'HALLORAN et al. · The Journal of Organic Chemistry · 1973 · 40 citations

Natural Sciences, Chemistry, Inorganic Chemistry +7

Ionization in liquid ammonia of methyl and amino groups bonded to pyridine and pyrazine. Method of determining their pKa values

John A. Zoltewicz, Larry S. Helmick · The Journal of Organic Chemistry · 1973 · 38 citations

Natural Sciences, Chemistry, Analytical Chemistry +12