Abstract
In the title compound, C25H18NO, a stable phenanthridinic nitroxide, the ring containing the nitroxide function assumes a twist-boat conformation and the dihedral angle formed by adjacent benzene rings is 21.78 (5)°. The phenyl substituents at position 2 are approximately orthogonal to each other, forming a dihedral angle of 81.04 (4)°. The crystal structure is stabilized by an intramolecular C—H⋯O hydrogen bond and by C—H⋯π interactions.
Highlights
C25H18NO, a stable phenanthridinic nitroxide, the ring containing the nitroxide function assumes a twist-boat conformation and the dihedral angle formed by adjacent benzene rings is 21.78 (5)
The crystal structure is stabilized by an intramolecular C—H O hydrogen bond and by C—H interactions
The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2
Summary
Astolfic a Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica. Universitá degli Studi di Parma, Viale G. P. Usberti 17/A, I-43100 Parma, Italy, bFakulteti i Shkencave të Natyrës, Departamenti i Kimise, Universiteti i Tiranes, Bulevardi "Zogu I", Tirana, Albania, and cDipartimento ISAC, Universitá Politecnica delle Marche, Via Brecce Bianche, I-60131 Ancona, Italy. R factor = 0.037; wR factor = 0.080; data-to-parameter ratio = 14.5
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