Abstract
Complexes of several 3d transition metals (Mn(II)-Zn(II)) with 2-(2,5,8-triaza-1-octenyl)phenol (Hsaden), [Msaden]CIO 4, have been studied using X-ray photoelectron spectroscopy (XPS). The N 1s peak is asymmetric and is an envelope of two components. A weaker component at a lower binding energy ( BE) is attributed to the azomethine nitrogen atom, the other one to the nitrogens in the two amino groups. The assignment is supported by spectra of diethylenetriamine complexes in which the N 1s peak is sharper and its BE value is similar to that of the second component. The N 1s electron BE increases from Mn to Cu, in accordance with the Irving-Williams series; planar [Nisaden]CIO 4 complex is the only exception.
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