Landolt-Brnstein Group II
: Molecules and Radicals
Volume 17 

Magnetic Properties of Free Radicals 
Subvolume G Semidiones and Semiquiones, and Related Species 
16
Semidiones and related species (M. LEHNIG) 5 
16.0

Introduction 5 
16.1

Semidiones 6 
16.2

Thiosemidiones and phosphasemidiones 44 
16.3

Semitriones 56 
16.4

Anion radicals from aromatic polycarbonyl and -thiocarbonyl compounds and 61 
16.5

References for 16.1 - 16.4 67 
17
Semiquinones and related species 69 
17.0

Introduction 69

17.1

Semiquinone anion radicals from carbocyclic compounds 70 
17.1.1

Carbocycles 70 
17.1.2

Naphthosemiquinones 257 
17.1.3

Anthrasemiquinones 283 
17.1.4

Phenanthrenesemiquinones 312 
17.1.5

Semiquinones from other carbocyclic compounds 334 
17.2

Semiquinones anions from heterocyclic compounds 347 
17.2.1

Nitrogen heterocycles 347 
17.2.2

Oxygen heterocycles 361 
17.2.3

Sulfur heterocycles 365 
17.3

Related compounds 378 
17.4

Semiquinone cation radicals 383 
17.5

References for 17.1 - 17.4 388 
Title Page, Preface 
General introduction (H. FISCHER) 1

(D.
 KLOTZ, TH. JLICH, G. WAX, H.B. STEGMANN)





polycyrboxylic acids 
General symbols and abbreviations (H. FISCHER) Index of Substances (See Vol. 17H) 
