Mixed Aggregates of the Dilithiated Koga Tetraamine: NMR Spectroscopic and Computational Studies.
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ABSTRACT:
SUBMITTER: Ma Y
PROVIDER: S-EPMC5226370 | biostudies-literature | 2016 Aug
REPOSITORIES: biostudies-literature
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Mixed Aggregates of the Dilithiated Koga Tetraamine: NMR Spectroscopic and Computational Studies.
Ma Yun Y Mack Kyle A KA Liang Jun J Keresztes Ivan I Collum David B DB Zakarian Armen A
Angewandte Chemie (International ed. in English) 20160720 34
A combination of (1) H, (6) Li, (13) C, and (15) N NMR spectroscopies and density functional theory computations explores the formation of mixed aggregates by a dilithium salt of a C2 -symmetric chiral tetraamine (Koga's base). Lithium halides, acetylides, alkoxides, and monoalkylamides form isostructural trilithiated mixed aggregates with few exceptions. (6) Li-(13) C and (6) Li-(15) N couplings reveal heretofore undetected transannular contacts (laddering) with lithium acetylides and lithium m ...[more]
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