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N-Alkylatin of Secondary Amines in Nickel(II) Complexes of Polyaza Macrotricyclic Ligands

  • Suh, Paik-Myunghyun (Department of Chemistry Education, Seoul National University) ;
  • Kim, Myung-Jin (Department of Chemistry Education, Seoul National University) ;
  • Kim, Hyun-Kyung (Department of Chemistry Education, Seoul National University) ;
  • Oh, Kye-Young (Department of Chemistry Education, Seoul National University)
  • Published : 1992.02.20

Abstract

The secondary nitrogen donors of the Ni(II) complexes of macrotricyclic ligands 8-methyl-1,3,6,8,10,13,15-heptaazatricyclo $[13.1.1.1^{13,15}]$octadecane (A) and 1,3,6,9,11,14-hexaazatricyclo $[12.2.1.1^{6,9}]$octadecane (B) are N-alkylated and the Ni(II) complexes of $N-Me_2A,\;N-Et_2A,\;and\;N-Me_2B$ are obtained. The Ni(II) complexes of $N-Me_2A\;and\;N-Et_2A$ are stable in acidic aqueous solutions while that of $N-Me_2B$ decomposes relatively rapidly. The N-alkylation leads to the decrease in the ligand field strength as well as an anodic shift in both of the oxidation and the reduction potentials of the Ni(II) complexes.

Keywords

References

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