Galvinoxyl-inspired dinitronyl nitroxide: structural, magnetic, and theoretical studies

Abstract

A novel galvinoxyl-inspired dinitronyl nitroxide (1) has been synthesized. Structural analysis revealed that 1 exhibited a resonance structure resulting from p-benzoquinonediimine N,N'-dioxide and N-phenyl nitroxide moieties. The magnetic study revealed...

Spiro-centre substitution effects in the intramolecular spin–spin interactions of spirobiacridine diradicals

“…The N1–O1 and N2–O2 bond lengths are 1.2868(15) and 1.2846(16) Å, respectively, which indicates the presence of a nitroxide group. 21 Ge–C α bond lengths are 1.9345(14)–1.9445(14) Å, which reproduce typical Ge–C sp 2 bonds. 16 b ,23,25 The Ge atom connects two dihydroacridines, forming a cruciform structure with a dihedral angle of 84.99°.…”

“…The N1–O1, N2–O2, N3–O3 and N4–O4 bond lengths are 1.288(1), 1.289(1), 1.288(1) and 1.288(1) Å, respectively, which are close to the typical values for nitroxides. 21 The bond lengths between Si and neighbouring carbon (C α ) atoms are 1.850(1)–1.866(1) Å around the Si1 atom and 1.850(1)–1.868(1) Å around the Si2 atom. These values reproduce those of typical Si–C sp 2 bonds.…”