Copper complexes of diacetylmonoxime girard T

Transition metal complexes with Girard reagent-based ligands

“…ical activity [3,4], Girard reagent hydrazones, quaternary N-acethydrazonium chloride, are also interesting to coordination chemists as a special class of organic ligands; the subject being still insufficiently explored. Namely, if compared with the large number of the known different hydrazones and their complexes, the number of Girard reagent hydrazones and the corresponding complexes is rather small.…”

“…Namely, if compared with the large number of the known different hydrazones and their complexes, the number of Girard reagent hydrazones and the corresponding complexes is rather small. In the complexes that have been synthesized up to now appear Girard-T (trimethylammoniumacethydrazide chloride), hydrazone of acetylmonoxime [4], anisaldehyde [5], salicylaldehyde [3,6,7] and pyridoxal [3,8], then Girard-D (dimethylammoniumacethydrazide chloride) hydrazone of diacetylmonoxime [9], as well as Girard-P (pyridiniumacethydrazide chloride) hydrazone of salicylaldehyde [7,10] and o-hydroxyacetophenone [11].…”

Formation Equilibria of Ternary Complexes of Co(Ii) with Girard T (Gt) and Some Amino Acids in Aqueous Solution

“…The selected model with the best statistical fit was found to consist of 110, 120 and 11-1 species. The stability constants of their complexes are given in Table (1). Previous studies 26 on related systems favoured the occurrence of structure (I) for 110 complex and reported the following scheme for acid dissociation from 110 complex yielding structure (II) which is referred to as 11-1.…”

“…The interest in the complexes of these reagents and their hydrazones, which, like the other Schiff bases, contain two or more ligating atoms, is of a more recent date. In the known complexes involving hydrazones of Girard's reagents, the bidentate [11][12][13] , or more frequently, tridentate [14][15][16][17] character has been assigned mostly on the basis of spectral data. Girard-T complexes of divalent metal ions M(II) have been reported in solid state 18 , but it's in aqueous solutions are very few .…”

Transition metal complexes with Girard reagent-based ligands. Part IV. Synthesis and characterization of pyridoxilidene Girard-T hydrazone complexes. Crystal structure of the copper(II) complex

“…Namely, to our knowledge only about ten papers appeared on the transition metal complexes with Girard-reagent hydrazones, namely, with trimethylammonium [7][8][9][10][11][12][13], dimethylammonium [14], and pyridinium [10,15,16] acethydrazones (GT, GD, and GP, respectively). In these papers the ligands are Girard hydrazones of diacetylmonoxime [7,14], anisaldehyde [8], salicylaldehyde [9,10,12,13,15], ortohydroxyacetophenone [16], and pyridoxal [11,12]. The mentioned hydrazones are usually tridentate ligands with ligator atoms consisting of azomethine nitrogen and carbonyl oxygen from acethydrazine moiety, while the third donor atom, mostly oxygen, is involved from a bifunctional carbonyl compound.…”