Alkali hyperfine coupling constant in biphenylene alkali metal ion pairs

1973 ◽  
Vol 69 ◽  
pp. 623 ◽  
Author(s):  
Carlo Corvaja ◽  
Luigi Pasimeni
Keyword(s):  
Alkali Metal ◽  
Metal Ion ◽  
Hyperfine Coupling ◽  
Ion Pairs ◽  
Hyperfine Coupling Constant ◽  
Coupling Constant ◽  
Alkali Metal Ion

Ionenpaare von o-Semichinonen mit Diorganothallium(III)- Kationen / Ion Pairs of Semiquinones with Diorgano Thallium (III) Cations

1978 ◽  
Vol 33 (2) ◽  
pp. 237-240 ◽  
Author(s):  
K. B. Ulmschneider ◽  
H. B. Stegmann ◽  
K. Scheffler ◽  
G. Viertel
Keyword(s):  
Alkali Metal ◽  
Temperature Dependence ◽  
Organic Solvents ◽  
Metal Ion ◽  
Strong Dependence ◽  
Ion Pairs ◽  
Coupling Constant ◽  
Alkali Metal Ion ◽  
Steric Interactions ◽  
G Factor

Diorgano thallium hydroxide reacts very smoothly in organic solvents with catechols to stable paramagnetic ion pairs. This reaction has been investigated with two semiquinone anions and 13 different diorgano thallium cations. The data obtained indicate a strong dependence of the thallium coupling constant on the nature of the metal substituents. The effects observed are discussed in terms of electronic and steric interactions. All ion pairs indicate remarkable temperature dependence of the thallium splitting and the g-factor. These results are compared with the results obtained in alkali metal ion pairs using a model described in the literature

scholarly journals The Coordination Chemistry of Phosphoryl Compounds Containing the -N(CH3)2 Group, XII.

1973 ◽  
Vol 28 (3-4) ◽  
pp. 104-106 ◽  
Author(s):  
M.W.G. De Bolster ◽  
B. Nieuwenhuijse ◽  
J. Reedijk
Keyword(s):  
Electron Spin Resonance ◽  
Metal Ion ◽  
Room Temperature ◽  
Esr Spectroscopy ◽  
Hyperfine Coupling ◽  
Hyperfine Coupling Constant ◽  
Zero Field ◽  
Coupling Constant ◽  
Spin Resonance ◽  
Temperature Electron

Room temperature electron spin resonance powder spectra have been recorded for some compounds of the type Mn(ligand)p(anion)2 with hexamethylphosphoramide and nonamethylimidodiphosphoramide as ligands (p = 1 - 4) and BF-4, NO-3, Cl-, Br-, I- and NCS-as anions.The values for the zero-field parameters, D and λ, have been determined and are compared with literature data. It is shown that ESR spectroscopy can be very helpful in elucidating the structures of manganese(II) complexes.The high values for the hyperfine coupling constant of the solvates suggest that in these complexes the bonding between the ligands and the metal ion is essentially ionic.

Photochemical reactions of fluoro-substituted ketones with amines, tetraphenylborates, and organometals: an electron spin resonance study

1980 ◽  
Vol 58 (6) ◽  
pp. 591-598 ◽  
Author(s):  
Kuang S. Chen ◽  
Terry Foster ◽  
Jeffrey K. S. Wan
Keyword(s):  
Alkali Metal ◽  
Metal Ion ◽  
Ion Pairs ◽  
Photochemical Reactions ◽  
Ammonium Ion ◽  
Electron Spin Resonance Study ◽  
Fluorine Substitution ◽  
Alkali Metal Ion ◽  
Spin Resonance ◽  
Spin Resonance Study

Ammonium ion-pairs, solvent-separated alkali-metal ion-pairs, and Group IVB organometallic adducts of fluoro-substituted ketones were generated photochemically. The structure and the controlling factors for the formation of contact ammonium ion-pair were deduced from the effects of solvent, amine, and fluorine substitution. The effect of fluorine on the formation of the alkali-metal ion-pairs and organometallic adducts was discussed.

Cation migration between two unequivalent sites in 4-cyano pyridine alkali metal ion pairs

1978 ◽  
Vol 31 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Luigi Pasimeni ◽  
Carlo Corvaja ◽  
Caterina Ghio
Keyword(s):  
Alkali Metal ◽  
Metal Ion ◽  
Ion Pairs ◽  
Alkali Metal Ion ◽  
Cation Migration
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