Polymeric ligand-metal acetate interactions: Spectroscopic study and semi-empirical calculations

Study of the Interactions Between Copper(ii) Acetate Monohydrate and Orotic Acid and Orotate Ligands

“…Cu-Cu distance in the compound Cu 2 (acetate) 2 (H 2 OR) 2 is 3.957 Aº, which is higher than that reported value 3.38 Aº for Cu 2 (CH 3 COO) 4 · 2H 2 O, calculated with the same method 16 , but the Cu-O distances did not suffer important change (see Table 5). In the complex, the distance C(33)-C(34) 1.489 Aº is lower than that free orotate anion 1.562 Aº.…”

“…The last one has been reported as a characteristic band to the acetates with bridge coordination type [16][17][18][19] . The magnetic moments for the compounds I and II 1.82 and 1.65.M.B respectively are higher than that 1.4 M.B reported for coper(II) acetate monohydrate 20 .…”

“…It is also possible to lose an acetate group to allow the coordination of other ligands or even change de coordination of the acetate group to monodentate coordination with the break of the Cu 2 (acetate) 4 unit, as it occurs with the imidazole ligand [12][13][14][15] . With polymeric ligands interact loosing one or two water molecules but also an acetate group to coordinate with the polymer as occur with poly(DL-aspartic acid) [16][17] .…”

Nonanuclear Coordination Compounds Featuring {M9L12}6+ Cores (M = NiII, CoII, or ZnII; L = 1,2,3‐Benzotriazolate)

“…[9] However, the homonuclear Ni, Co, and Zn compounds described in the current manuscript have all been synthesized using an excess of ligand, which acts as an auxiliary base leading to deprotonation of the acidic protons of coordinated ligands. Employing this strategy, we have been able to prepare three novel compounds, namely [Ni 9 (bta) 12 (2), and [Zn 9 (Me 2 bta) 12 (CH 3 COO) 6 ]·3DMF (3), which were characterized by single-crystal X-ray structure analysis, UV/Vis spectroscopy as well as temperature-dependent magnetic susceptibility measurements. To the best of our knowledge, compound 2 and 3 are the first examples of nonanuclear Co II and Zn coordination compounds containing µ 3 -bridging benzotriazolates (Scheme 2).…”

Syntheses and Characterizations of Copper Complexes: Interaction of Copper Acetate Dihydrate With 4,4´-Bipyridine

“…Instead of forcing dissociation of the dinuclearCu 2 (CH 3 COO) 4 units, these ligands simply replace bound water molecules, causing only small changes in the CuCu distances ( Figure 1) [1][2][3][4]. Similar behavior has been found with polymeric ligands containing nitrogen functional groups [5,6].…”