caa a22 4500 465775357 CHVBK 20180323111940.0 cr unu---uuuuu 170327e19900201xx s 000 0 eng 10.1007/BF01032228 doi (NATIONALLICENCE)springer-10.1007/BF01032228 New uranyl(VI) complexes with hydrazones derived from aliphatic and aromatic acid hydrazides containing dihydroxo bridges [Elektronische Daten] [Aicha Yacouta-Nour, Mohsen Mostafa, Abobaker Maki] Summary: Several new uranyl(VI) complexes of hydrazones, derived from formoyl-, acetoyl-, butroyl-, caproyl-, salicyloyl-, oxaloyldi-, malonoyldi-, and adipolyldi-hydrazines and benzaldehyde or salicylaldehyde have been prepared in absolute EtOH and in the presence or absence of AcONa. The complexes have been characterized by elemental analyses, molar conductivities, spectral (u.v., i.r, n.m.r.,) and magnetic measurements. I.r. spectral data suggest that the ligands coordinate in a bi-, tri- and/or tetradentate fashion in the enol form, and that proton displacement proceedsvia the enolized carbonyl oxygen solely in the benzaldehyde hydrazone complexes and through the OH (phenolic) in the salicylaldehyde hydrazone complexes. Moreover, the spectral data show the existence of dihydroxo bridges for benzaldehyde hydrazone complexes. The role of the OH (phenolic) as well as the presence or absence of NaOAc on the properties of the latter complexes is discussed. Chapman and Hall Ltd., 1990 Yacouta-Nour Aicha INES-Hydraulique, Bp. 401, Tlemcen, Algeria aut Mostafa Mohsen INES-Hydraulique, Bp. 401, Tlemcen, Algeria aut Maki Abobaker Chemistry Department, Faculty of Science, Al-Azaher University, Egypt aut Transition Metal Chemistry Kluwer Academic Publishers 15/1(1990-02-01), 34-38 0340-4285 15:1<34 1990 15 11243 https://doi.org/10.1007/BF01032228 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01032228 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yacouta-Nour Aicha INES-Hydraulique, Bp. 401, Tlemcen, Algeria aut NATIONALLICENCE 700 1- Mostafa Mohsen INES-Hydraulique, Bp. 401, Tlemcen, Algeria aut NATIONALLICENCE 700 1- Maki Abobaker Chemistry Department, Faculty of Science, Al-Azaher University, Egypt aut NATIONALLICENCE 773 0- Transition Metal Chemistry Kluwer Academic Publishers 15/1(1990-02-01), 34-38 0340-4285 15:1<34 1990 15 11243 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer