A dinuclear vanadyl(IV) complex of 3,5-dicarboxypyrazole: synthesis, crystal structure, and electron spin resonance spectra

1992 ◽  
Vol 31 (10) ◽  
pp. 1963-1965 ◽  
Author(s):  
Carl W. Hahn ◽  
Paul G. Rasmussen ◽  
J. Carlos Bayon
Keyword(s):  
Crystal Structure ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance

The Radical Ion S3N2+. Preparation, Electron Spin Resonance Spectrum, and Crystal Structure of Thiodithiazyl Hexafluoroarsenate S3N2+AsF6−

1975 ◽  
Vol 53 (21) ◽  
pp. 3147-3152 ◽  
Author(s):  
R. J. Gillespie ◽  
P. R. Ireland ◽  
J. E. Vekris
Keyword(s):  
Crystal Structure ◽  
Electron Spin Resonance ◽  
Electron Spin Resonance Spectrum ◽  
Electron Spin ◽  
Methylene Chloride ◽  
Resonance Spectrum ◽  
Three Dimensional ◽  
Monoclinic Space Group ◽  
Spin Resonance ◽  
Counter Data

The compound S3N2+AsF6− has been prepared by the reaction of S4N4 with AsF5. The crystal structure has been determined from three-dimensional X-ray counter data. Crystals are monoclinic, space group P21/c with a = 8.499(4), b = 8.298(4), c = 11.069(8), β = 94.59(5), V = 778.1 Å3, Z = 4, and Dc = 2.67 g cm−3. The structure was solved by Patterson methods and refined to a conventional R factor of 0.028 for 798 independent reflections with I ≥ 3σ(I). The structure consists of discrete AsF6− ions and planar cyclic S3N2+ ions. Solutions of S3N2+AsF6− in methylene chloride gave a five-line electron spin resonance spectrum with an intensity ratio of 1:2:3:2:1 showing that the unpaired electron in S3N2+ is coupled to two equivalent nitrogen atoms in full accord with the results of the crystal structure determination.

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