Synthesis of Imine-Naphthol Tripodal Ligand and Study of Its Coordination Behaviour towards Fe(III), Al(III), and Cr(III) Metal Ions

Table 2

Protonation constants () of the ligand and trenhynaph at = 25 ± 1°C and  M KCl in DMSO/H₂O (5/95) calculated using Hyperquad 2006 [31].

Equilibrium
	Assignments	Potentiometry	Spectrophotometry
L + H HL	O–H
HL + H H2L	O–H
	O–H