Metal complexes

   
   

Metal complexes of metals of the scandium group with an azo compound which conforms to the formula (I) or to one of its tautomeric structures ##STR1## where R is OH, NH.sub.2, NH--CN, arylamino or acylamino, R' is NH.sub.2, NH--CN, arylamino or acylamino and R.sup.1 and R.sup.1 ' are independently --OH or --NH.sub.2.

I complessi dei metalli del gruppo di scandium con un residuo azo che è conforme alla formula (i) o ad uno del relativo ## tautomeric del ## STR1 delle strutture in cui la R è l'OH, NH.sub.2, il NH -- cn, arylamino o acilamminico, R del metallo 'è NH.sub.2, il NH -- cn, il arylamino o acilamminici e R.sup.1 e R.sup.1 'è indipendentemente --OH o -- NH.sub.2.

 
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