2001
DOI: 10.1002/1522-2675(20010321)84:3<623::aid-hlca623>3.0.co;2-0
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The Stability of MetalN,N,N′,N′-Tetrakis(2-aminoethyl)ethane- 1,2-diamine (=penten) Complexes and the X-Ray Crystal Structure of [Tl(NO3)(penten)](NO3)2

Abstract: Complex formation between N,N,N',N'-tetrakis(2-aminoethyl)ethane-1,2-diamine (penten) and the metal ions Mn 2 , Co 2 , Cu 2 , Zn 2 , Cd 2 , Hg 2 , Ag , Pb 2 , and Tl 3 (in 1.00m NaNO 3 and 258) was investigated by potentiometry and spectrophotometry. These are the first reported values of the stability constants for this ligand with Ag , Pb 2 , and Tl 3 . The X-ray crystal structure of [Tl(NO 3 )(penten)](NO 3 ) 2 was determined. In this structure, Tl 3 shows a coordination number of seven made up of the six N… Show more

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Cited by 11 publications
(3 citation statements)
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“…The high tendency for forming partially protonated complexes such as [MHL] 3+ and [ML(HL)] 3+ . Protonation of coordinated polyamine ligands in an acidic medium is in general well established . However, for L a and MeL a the amount of protonation is unusual.…”
Section: Discussionmentioning
confidence: 97%
“…The high tendency for forming partially protonated complexes such as [MHL] 3+ and [ML(HL)] 3+ . Protonation of coordinated polyamine ligands in an acidic medium is in general well established . However, for L a and MeL a the amount of protonation is unusual.…”
Section: Discussionmentioning
confidence: 97%
“…Ligand classes considered were: (1) O-donor ligands, such as di- (succinate), tetra- (1,2,3,4-butanetetracarboxylate), and hexa- (1,2,3,4,5,6-benzenehexacarboxylate) carboxylates, and polyelectrolytes, such as polymethacrylate and polyacrylates, at two different molecular weights; (2) N-donor ligands, such as amines containing a different number of aminic groups (from ethylenediamine to tetraethylenepentamine), and polyelectrolytes, such as poly(allylamine) and poly(ethylenimine); and (3) amino acids such as glycine containing one carboxylic and one amino group, histidine containing an additional amino group, and aspartic acid containing an additional carboxylic group. Hg 2+ −carboxylate, −amine, and −amino acid systems reported in the literature are collected in Table . In this article, equilibria were studied potentiometrically in NaNO 3 at I = 0.1 mol·L −1 and t = 25 °C. Under the same conditions, for Hg 2+ −1,2,3,4-butanetetracarboxylate, −1,2,3,4,5,6-benzenehexacarboxylate, −diethylenetriamine, −poly(ethylenimine), and −glycine systems, the enthalpy changes by calorimetric measurements were also determined.…”
Section: Introductionmentioning
confidence: 99%
“…At the [154][155][156] may reach 40. This is obvi ously related to the fact that the measured property in the case of the potentiometric technique is propor tional to logarithm of the concentration (see Eq.…”
Section: Relationship Of Measured Characteristic To Concentrationsmentioning
confidence: 99%