Can I read Phenazin‐5(10 H )‐yls, 5. – Intermolecular π‐π Interactions (Pimerization) of tert ‐Butyl‐Substituted Phenazin‐5(10 H )‐yl Radicals in The Solid State: Syntheses, Crystal Structures and Magnetic Susceptibility Measurements on EtoBox?

Phenazin‐5(10 H )‐yls, 5. – Intermolecular π‐π Interactions (Pimerization) of tert ‐Butyl‐Substituted Phenazin‐5(10 H )‐yl Radicals in The Solid State: Syntheses, Crystal Structures and Magnetic Susceptibility Measurements by Marco R. Gleiter; Basil Kanellakopulos; Claus Krieger; Franz A. Neugebauer is a Chemistry article available to read on EtoBox.

What is Phenazin‐5(10 H )‐yls, 5. – Intermolecular π‐π Interactions (Pimerization) of tert ‐Butyl‐Substituted Phenazin‐5(10 H )‐yl Radicals in The Solid State: Syntheses, Crystal Structures and Magnetic Susceptibility Measurements about?

## Abstract Introduction of __tert__‐butyl groups into the phenazine frame‐work was accomplished by treatment of 5‐acetyl‐5,10‐dihydrophenazine (2a) with __tert__‐butyl chloride in the presence of AlCl~3~. Starting from the 2,8‐ or 3,7‐di‐__tert__‐butyl‐substituted derivatives 2c and 2b, a series of phenazin‐5(10__H__)‐yl radicals (1c–i) was synthesized and characterized by ESR and EN‐DOR spectroscopy. With the exception of 1c, all phenazin‐5(10__H__)‐yls were obtained in crystalline form, and for 1d–f the long‐wavelength absorption band at λ ≈ 870 nm indicates intermolecular π‐π interactions in the solid state. For 1d, 1e and 1h the crystal structure could be determined. The unit cell of 1d consists of eight phenazin‐5(10__H__)‐yls. Surprisingly, four of them are arranged in radical pairs, whereas the other four lie independently in the lattice. In agreement with this structure, the magnetic susceptibility results correspond to a content of 50% monoradical and an almost complete spinpairing in the radical pairs up to __T__ = 220 K. In 1e, the four phenazin‐5(10__H__)‐yls in the unit cell are arranged in two independent radical pairs, A and B, which are characterized by close inter

Who reads Phenazin‐5(10 H )‐yls, 5. – Intermolecular π‐π Interactions (Pimerization) of tert ‐Butyl‐Substituted Phenazin‐5(10 H )‐yl Radicals in The Solid State: Syntheses, Crystal Structures and Magnetic Susceptibility Measurements?

Author

Marco R. Gleiter; Basil Kanellakopulos; Claus Krieger; Franz A. Neugebauer

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); VCH Verlagsgesellschaft; Wiley (ISSN 0947-3440)

Published

1997

Language

EN

Field

Chemistry (Physical Sciences)