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    STUDIA CHEMIA - Issue no. 1-2 / 2000  
         
  Article:   SPECTROSCOPIC STUDIES OF SOME METALLIC BIS-DITHIOPHOSPHONATES, M(DTP)2, AND OF SOME ADDUCTS.

Authors:  RODICA MICU-SEMENIUC, IONEL HAIDUC, RADU SEMENIUC, ONUC COZAR. 		 
       
         
  Abstract:  Metallic bis-[4-methoxyphenyl-O-methyl]-dithio-phosphonate complexes (MII=Fe, Ni, Cu, Zn, Cd, Hg, Sn) and the adducts with tertiary amines of Fe(II) and Ni(II) dithiophosphonates were prepared and investigated by UV-VIS, IR and EPR spectroscopies. The electronic spectra show the changes in coordination sphere of Fe(II) and Ni(II)-bis(4-methoxyphenyl-O-methyl-dithiophosphonates) by formation of the adducts. The characteristic frequencies of the PS2 group confirm different coordination types of dithiophosphonate anion. EPR spectrum presents hyperfine and superhyperfine structure, suggesting a distorted D4h symmetry.  
         
     
         
         
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