The spin density in an imino nitroxide free radical: A polarized-neutron study

✍ Scribed by A. Zheludev; M. Bonnet; D. Luneau; E. Ressouche; P. Rey; J. Schweizer

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 263 KB
• Volume: 213-214
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(95)00126-t

✦ Synopsis

Imino nitroxide free radicals are potential building blocks for molecular-based magnets. They are purely organic and carry a spin ½ which is delocalized over several atoms of the molecule. We have determined the spin density of one of them, the 2-(3-nitrophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl(m-NPl M), by polarized-neutron diffraction on a single crystal. The delocalization of the singly occupied molecular orbital (SOMO) and the spin polarization effects, which give rise to negative spin densities, are observed directly.