By Fabian Gerson
Preface.Abbreviations and Symbols.A. common PART.1. actual basics of Electron Spin Resonance.2. Paramagnetic natural Species and Their Generation.3. Electron-Nuclear Magnetic Interaction.4. Spin Density, Spin inhabitants, Spin Polarization, and Spin Delocalization.5. Multiresonance.6. Taking and examining ESR Spectra.B. SPEICAL PART.7. natural Radicals established on One, , or 3 Atoms.8. Conjugated Hydrocarbon Radicals.9. Conjugated Radicals with Heteroatoms.10. Saturated Hydrocarbon Radicals.11. Biradicals and Triplet-state Molecules.Appendices.References.Index.
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Additional info for Electron spin resonance spectroscopy of organic radicals
1). One merely has to replace the spin-quantum numbers S and MS ¼ S; S À 1; . . ÀS, the multiplicity 2S þ 1, and the spin vector ~ S by the corresponding numbers I and MI ¼ I; I À 1; . . ÀI, the multiplicity 2I þ 1, and the vector ~ I. In addition, the magnetic moment of an electron ~ me ¼ À½g e mB =i~ S and its z component me; z ¼ Àg e mB MS are replaced by ~ I and m n; z ¼ þg n mN MI m n ¼ þ½g n mN =i~ ð3:1Þ where g n and ~ m n are the g factor and magnetic moment of the nucleus, and mN ¼ 5:0508 Á 10À27 AÁm 2 or JÁTÀ1 is the nuclear magneton.
M À þ K ! M 2À ðor M 2À Þ þ Kþ .. M 2À ðor M 2À Þ þ K ! 2]paracyclophane-1,9-dienes , corrannulene , 2,4,6-triphenylphosphabenzene [180, 181] and diphosphapolyphenylenes , and fullerenes . In some cases, disproportionation of radical anions to neutral molecules and dianions  impairs observation of the former : . 2 M À ! M þ M 2À Because of ion pairing with positively charged counterions (Chapt. 6), this disproportionation is favored by ethereal solvents of low solvation power, such as MTHF.
432], 55.. [433, 434], and 56.. [435, 436], contain persistent radical moieties, namely perchlorotrityl (3. ), a nitroxyl related to TEMPO (8. ), and galvinoxyl (10. ), respectively (Chapt. 1). The recently isolated stable carbenes, which are derivatives of imidazol, have a singlet ground state . Like radicals in the doublet state, most triplet molecules are of the p type. 1). One merely has to replace the spin-quantum numbers S and MS ¼ S; S À 1; . . ÀS, the multiplicity 2S þ 1, and the spin vector ~ S by the corresponding numbers I and MI ¼ I; I À 1; .
Electron spin resonance spectroscopy of organic radicals by Fabian Gerson