| Literature DB >> 24339377 |
Katarina Vazdar1, Roman Kunetskiy, Jaan Saame, Karl Kaupmees, Ivo Leito, Ullrich Jahn.
Abstract
New structural motives for organosuperbases, that are easy to prepare and highly basic are urgently required in many areas of chemistry. The synthesis of N,N'-bis(imidazolyl)guanidine bases (BIG bases) is reported. Their pKα values are determined as 26.1-29.3 in THF. They are thus probably the strongest known phosphorous-free organic bases both in solution and in the gas phase. Calculations help to determine the structural and electronic factors giving rise to the high basicity.Entities:
Keywords: UV/Vis spectroscopy; basicity; guanidine; organosuperbases; synthetic methods
Year: 2013 PMID： 24339377 DOI： 10.1002/anie.201307212
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN： 1433-7851 Impact factor: 15.336