Iminodiacetic acid complex

The difficulties in the synthesis of iminodiacetic acid complex serve as typical of this family of complexes. Mixing NdCH solution with Nd2(IMDA)3 solution yielded... 

Group 11. Paramagnetic (1H, 15N) NMR spectra were used to study a Cu -IDA (=iminodiacetic acid) complex localised on a protein surface. H and 13C NMR spectra were reported for copper(II) bis-benzimidazole complexes.1225 Variable temperature H NMR spectra of copper complexes of p-octafluorinated triarylcorroles reveal a thermally-accessible paramagnetic excited state, i.e. a Cu11 corrole 7i-cation radical.1226 Copper(II) forms of stellacyanin from Rhus vernicifera were characterised by H NMR.1227... 

Fluorimetry Tb La203 By formation of 1 1 1 Tb-Tiron-iminodiacetic acid complex 23 ppb (Tb) Tischenko et al. (1974)... 

The complexities that are inherent in the preparation of these types of compounds are illustrated by the iminodiacetic acid complexes. In an attempt to prepare Nd(IMDA)Cl H20, equimolar aqueous solutions of Nd2(IMDA)3 and NdCls were mixed (Albertsson and Oskarsson, 1968). Addition of ethanol after concentration to a syrup resulted in a microcrystalline precipitate which after hydrothermal treatment at 80°C for three weeks was found to be Nd2(IMDA)3 2HCh7H20. The structural determination showed that two protons... 

Phosphoproteins (various). Purified by adsorbing onto an iminodiacetic acid substituted agarose column to which was bound ferric ions. This chelate complex acted as a selective immobilised metal affinity adsorbent for phosphoproteins. [Muszyfiska et al. Biochemistry 25 6850 1986.]... 

Complexes of IrIV with iminodiacetic acid (HN(CH2COOH)2), nitrilotriacetic acid (N(CH2COOH)3), and trara,s-l,2-cyclohexanediaminetetraacetic acid (L) have been studied by spectroscopic methods.43... 

The complexity that may arise even for a relatively simple molecule is illustrated by iminodiacetic acid, H02CCH2NHCH2C02H. This acid has three crystal forms. The bond angles and lengths are essentially the same in all the forms, but the torsional angles differ, providing three different molecular conformations (19). In addition, one of the forms has two symmetry-independent molecules, of slightly different conformations, in its asymmetric unit. 

During the early sixties Thompson and Loraas (77) reported the formation of mixed complexes of reasonable stability (log K 3.0—5.3) between lanthanide—HEDTA and ligands such as EDDA (N,N -ethylenediaminediacetic acid), HIMDA (N-hydroxyethyliminodiacetic acid) and IMDA (iminodiacetic acid). This observation together with the remarkably large formation constants (72) for the bis-EDDA complexes [log A2 =4.73 (La) 8.48 (Lu)] suggested a coordination number larger than six for the tripositive lanthanide ions in aqueous solution, in view of the fact that mixed chelates of the t5q>e M (HEDTA) (IMDA) axe not formed when M =Co(II), Ni(II) or Cd(II). 

Several complexes with iminodiacetic acid (H2ida) and methyliminodiacetic acid (H2mida) have been prepared.1225 The bis mida complex exists only as the trans isomer, ida forms bis cis N complexes this is also the arrangement adopted in the mixed mida/ida complex. 

G. Iminodiacetic acid forms 2 1 complexes with many metal ions ... 

The edta complexes of zinc and cadmium are well documented and we focus here on some of the structural variants based on iminodiacetic acid. 

Complexes with IMDA and related ligands.—A series of three substituted aminoacetic acids, IMDA, HIMDA and NTA constitute another set of very interesting ligands. The stability constants of the iminodiacetic acid (IMDA) [ 465], N-hydroxyethyliminodiacetic acid (HIMDA) 466 and nitrilotriacetic acid (NTA) complexes are compared in Table 34. Based on log k values the following trend of stability is noted. The... 

Finally, lV-(cyanomethyl)iminodiacetic acid was obtained from the ester of iminodiacetic acid and chloroacetonitrile as illustrated in Scheme l.10 The purified ester is hydrolyzed selectively at the methylester groups with zinc perchlorate in a 70% alcoholic solution and formation of the 1 1 complex (3) occurs. The substituted iminodiacetic acid is extracted with ether after zinc separation as ZnS by treatment with H2S, and crystallized in a chloroform ethanol solution. 

A hexadentate chromium-complexed magenta dye (41) is described as being useful in image transfer applications.107 It is prepared by attaching an iminodiacetic acid residue to an o,o-dihydroxyazo dye in an appropriate position so that it is suitably disposed to coordinate to the chromium. 

The complexing ability of iminodiacetic acid type chelating agents, e.g. benzyl-aminediacetic acid (BDA) (8), was found to be enhanced considerably in aqueous solution by the use of a polymeric analogue such as (vinylbenzylamine diacetic acid)-co-(sodium styrenesulfonate) (PBDA) (9) 23). The chelate formation constants for... 

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