A Study on the Complexation of Nickel(II) Ion with 2-(2-Hydroxyethylamino)-2-(hydroxymethyl)-1,3-propanediol(Monotris) in Aqueous Solution

Ni(II)이온과 2-(2-Hydroxyethylamino)-2-(hydroxymethyl)-1,3-propanediol(Monotris)과의 착물형성을 $25^{\circ}C$ 이온강도 0.10M 에서 전위차법으로 연구하였다. $NiL^{2+}$ 착물은 히드록실기의 산소 원자 뿐만아니라 아민의 질소기도 금속에 배위하였다. pH가 증가하면서 $NiL^{2=}$ 는 3개의 수소이온이 해리된 $Ni_2L_2H_{-3}^+$ 의 이핵착물이 형성되었다. The complex formation from Ni(II) ion and 2-(2-Hydroxyethylamino)-2-(hydroxymethyl)-1,3-propanediol(Monotris) in aqueous solution at $25^{\circ}C$ and at ionic strength of 0.10M has been studied potentiometrically. In the Monotris(L) comlex $NiL^{2+}$ , hydroxyl oxygen atom as well as the amine nitrogen of the ligand are coordinated to the Ni(II) ion.. The complex $NiL^{2+}$ undergoes further dissociation as the pH is increased forming triply deprotonated dinuclear complex $Ni_2L_2H_{-3}^+$ .