NDLI: Copper(II), nickel(II) and palladium(II) complexes of the diamide ligand N,N′-bis(2-carbamoylethyl)ethylenediamine (H2L) and the crystal structure of the carbonyl-oxygen-bonded copper(II) complex [Cu(H2L)](ClO4)2

Content Provider	SpringerLink
Author	Hay, Robert W. Govan, rman Perotti, Angelo Carugo, Oliviero
Copyright Year	1997
Abstract	The preparation of the diamide ligand N,N′-bis(2-carbamoylethyl)ethylenediamine (H2L) by Michael addition of ethylenediamine to acrylamide is described. The copper(II) complex [Cu(H2L)](ClO4)2 and the deprotonated complex [CuL]·H2O have been prepared and characterized as has the blue octahedral nickel(II) complex [Ni(H2L)](ClO4)2. The crystal structure of the carbonyl-oxygen-bonded copper(II) complex [Cu(H2L)] (ClO4)2 has been determined (R=5.5%). The stepwise protonation equilibria of the ligand have been studied by potentiometric titration, giving values of logK1= 8.71 and logK2=5.74 at 25°C and I=0.1moldm−3 (NaClO4). The interaction of copper(II) with the ligand (H2L/Cu(II)=1:1) can be fitted to the set of equilibria:With nickel(II), only two complexes, [Ni(H2L)]2+ and [NiL], occur and they have formation constants of logβ110=7.39 and log β11−2=−11.49. With palladium- (II) the system is similar to that with copper(II) with three complex species, 110, 11−1 and 11−2, with log β110=15.48, log β11−1=11.88 and log β11−2=7.32.
Starting Page	389
Ending Page	394
Page Count	6
File Format	PDF
ISSN	03404285
Journal	Transition Metal Chemistry
Volume Number	22
Issue Number	4
e-ISSN	1572901X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Boston
Access Restriction	Subscribed
Subject Keyword	Inorganic Chemistry Physical Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry Materials Chemistry Metals and Alloys

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