Complexes of nickel(II) with ethylenediamine and perchlorate or tetraphenylborate

Authors:
  • MFM. E. Farago
    M. E. Farago
  • JJJ. M. James
    J. M. James
  • VTV. C. G. Trew
    V. C. G. Trew
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Abstract
Complexes of nickel(II) and ethylenediamine with the two weakly co-ordinating anions perchlorate and tetraphenylborate have been prepared and their physical properties are reported. The results indicate that in the solid state the diaquo-ion [Ni en2(OH2)2]2+ may have the cis or the trans configuration depending on the anion. Two forms of the anhydrous compound Ni en2(ClO4)2, have been obtained and the infrared evidence suggests that the orange form contains ionic perchlorate, while the blue form contains bidentate perchlorate.