815608-05-0Relevant academic research and scientific papers
A multifunctional high-spin biradical pyrazolylbipyridine- bisnitronylnitroxide
Zoppellaro, Giorgio,Enkelmann, Volker,Geies, Ahmed,Baumgarten, Martin
, p. 4929 - 4932 (2004)
(Chemical Equation Presented) Synthesis and UV-vis, IR, and EPR spectroscopic characterizations, together with X-ray structural analysis, of functional nitronyl- and iminonitroxides attached to pyrazolylbipyridine are described. The exchange interactions between the nitronylnitroxides are found to be stronger than for the iminonitroxides. Although the substitution of a pyridine with the pyrazole ring leads to shorter distances and larger dipolar couplings, the exchange interaction is diminished. While compound 1 forms dimers in the solid state, the terpyridine 3 leads to supramolecular π-stacking.
