Premium
Stabilities and Near UV. Charge transfer spectra of binuclear and heterobinuclear complexes of N,N′‐bis‐[2‐(2‐pyridylmethyl‐amino)‐ethyl]‐oxamide with transition‐metal ions
Author(s) -
Buxtorf UrsPeter,
Zuberbühler Andreas
Publication year - 1973
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19730560150
Subject(s) - chemistry , oxamide , copper , ion , metal , transition metal , absorption (acoustics) , absorption spectroscopy , inorganic chemistry , polymer chemistry , crystallography , nuclear chemistry , organic chemistry , catalysis , physics , quantum mechanics , acoustics
The formation of complexes of N,N′‐bis‐[2‐(2‐pyridylmethyl‐amino)‐ethyl]‐oxamide (PAOH 2 ) with Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ and Zn 2+ has been studied potentiometrically and spectrophotometrically. Besides mononnclear species, PAOH 2 forms the binuclear or heterobinuclear complexes Cu 2 (PAOH 2 ) 4+ , Cu 2 PAO 2+ , Zn 2 PAO 2+ , CuNiPAO 2+ , and probably CuZnPAO 2+ Some of these five compounds show an UV. absorption band near 350 nm reminiscent of that to dimeric copper acetate. The results suggest that charge transfer from the oxamidato group to Cu 2+ is responsible for the near UV. absorption.