3861-18-5Relevant articles and documents
Potassium Salts of Asymmetrically Substituted Amidinates and a Triazenide
Preusser, Silvio,Kalden, Diana,Bevern, Damian,Oberheide, Ansgar,G?rls, Helmar,Imhof, Wolfgang,Westerhausen, Matthias,Krieck, Sven
, p. 1970 - 1978 (2019)
Potassiation of amidines and triazenes yields the corresponding potassium amidinates and triazenides. The favored configuration of the amidinate ligands is the (syn-E)-form whereas all known triazenides adopt this isomeric form. Extremely bulky groups at the amidinate ligands enforce the anti-configuration stabilized by π-interactions between potassium and N-bound aryl groups. A special case has been observed for N′-bound 2-pyridylethyl substituents. In moderately strained amidines the 1,3-diazaallyl moiety is deprotonated whereas in heavily congested amidines the ethylene fragment is potassiated inducing deamidation and elimination of 2-pyridylethene. The potassium salts of (syn-E)-isomeric amidinates and triazenides contain a central octahedral K2N4 cage which can be severely distorted by steric requirements of attached bulky substituents.
Amidines. VII. Hydrolysis and alcoholysis of carboxamides under mild conditions
Ono,Araya,Todoriki,Tamura
, p. 1824 - 1831 (2007/10/02)
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