Synthesis and Magnetic Properties of (Pyrrolidin‐1‐oxyl)–(Nitronyl Nitroxide)/(Iminonitroxide)‐Dyads

Abstract

Unlike extensivelys tudied diradicals linked by pconjugated systems, only af ew studies have investigated weakly coupled diradicals linked by an sp 3 carbon atom. Herein, we prepared pyrrolidin-1-oxyl-(nitronyl nitroxide)dyad 5 and pyrrolidin-1-oxyl-iminonitroxide-dyad 6.F rom the observed temperature dependence of the magnetic sus-ceptibility, 5 and 6 were determined to be in singlet ground states with 2J intra /k B = À35.2 Ka nd À13.6 K, respectively. From these resultsa nd theoretical calculations of related diradicals,t he spin-polarization model countingt he small spin density of the sp 3 carbon atom could be used as as pin-predictionm odel.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Ionic Liquids Nitrogen-Based, Preparation, Characterization, and Application

“…Pyrrolidin stands on the five-membered nitrogen-containing ring. Researchers used to prepare pyrrolidin from different sources, pyrrolidin-1-oxyl-(nitronyl nitroxide)-dyad and pyrrolidin-1-oxyl-iminonitroxidedyad had been prepared under controlled temperature and magnetic susceptibility [12]. Furthermore, pyrrolidinium and piperidinium based ionic liquid and linked to platinum compounds ([Pt(cod)Cl2] and K2[PtCl6]) they applied as catalysts for hydrosilylation 1-octene and allyl glycidyl ether with 1,1,1,3,5,5,5-heptamethyltrisiloxane [13].…”

Homoconjugation Mediated Spin-Spin Coupling in Triptycene Nitronyl Nitroxide Diradicals

“…However, predicting intramolecular magnetic exchange interaction for the σ-frame diradical systems [38,39] remains challenging. Examples of conjugated systems containing saturated atoms bridging diradicals have been reported [23,34,[40][41][42][43][44].…”

“…Examples of conjugated systems containing saturated atoms bridging diradicals have been reported [23,34,[40][41][42][43][44]. Izuoka et al [34] studied the A and B structures with neutral thianthrene diradicals in Scheme 1 consistent However, predicting intramolecular magnetic exchange interaction for the σ-frame diradical systems [38,39] remains challenging. Examples of conjugated systems containing saturated atoms bridging diradicals have been reported [23,34,[40][41][42][43][44].…”

2-Imidazoline Nitroxide Derivatives of Cymantrene

“…The design of organometallic derivatives of nitroxide radicals [ 1 , 2 , 3 ] has a high potential for the development of new organic synthesis principles and the study of the mechanisms of catalytic reactions [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ] as well as for the creation of polyfunctional magnetoactive materials exhibiting diverse intra- and intermolecular interactions and spin-exchange coupling [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ,…”