Synthesis, physical studies and crystal structure determination of Y(III) and Er(III) complexes of 1-(pyridin-2-yl)-2-(pyridine-2-ylmethylene)hydrazine

Crystal structure of di-μ-acetato-κ4 O:O′-bis{(acetato-κ2 O,O′)tetraaqua[1-(pyridin-2-ylmethylidene-κN)-2-(pyridin-2-yl-κN)hydrazine-κN 1]lanthanum(III)} dinitrate hemihydrate

“…The La-O distances s fall in the range reported for other carboxylate complexes (Gueye, Moussa et al, 2017;Bag et al, 2013;Chen et al, 2014). The distances for La-OH 2 are comparable to the values in the complex [{Ln(HL(� 2 -OOCH 3 ) 2 (� 1 -H 2 O) 2 }{� 2 -OOCH 3 ) 2 }-{Ln(HL)(� 2 -OOCH 3 ) 2 }(� 1 -H 2 O) 2 ]•2NO 3 , (where Ln = Nd or Sm) (Ndiaye- Gueye, Dieng, Thiam, Lo, et al, 2017). The La III � � �La III distance is 4.6696 (6) A ˚and the value of the bridging angle O3-La1-O10 is 109.21 (5) � .…”

“…A search of the Cambridge Structural Database (CSD version 5.44, updates of September 2023; Groom et al, 2016) indicated 27 compounds incorporating the ligand 1-(pyridin-2-ylmethylidene)-2-(pyridin-2-yl)hydrazine, which has been widely used in coordination chemistry. Seven examples of complexes of the above ligand with f-block metal ions are known from the literature: BEHFUS and TESXOH (Gueye, Dieng et al, 2017), PCPHYB (Baraniak et al, 1976), TIKDAV and TIKCUO (Ndiaye- Gueye, Dieng, Thiam, Lo, et al, 2017), ZEFJOM (Gueye, Moussa et al, 2017), GIJYAD (Ndiaye- Gueye et al, 2022). Three structures are available for the Ca 2+ metal ion: NIWLEM, NIWLIQ and NIWLOW (Vantomme, Hafezi et al, 2014).…”

Synthesis, Structure And Thermogravimetric Analysis Of Copper(II) Complex Derived From N1 ,N3 -Bis(1-(Pyridin2-Yl)Ethylidene)Propane-1,3-Diamine

“…The low value of the νC=N vibration is indicative of the involvement of azomethine nitrogen atom in the coordination to the Cu atom. In fact, the value of the reported νC=N vibration for analogous ligands is higher than this value [24]. Coordination is confirmed with the apparition of a new band at 459 cm -1 due to the νCu-N [25].…”

Coordination of N, O-donor Appended Schiff Base Ligand N, N’-bis (3-Methoxy Salicylidenimino-1,3-diaminopropane) towards Nickel (II), Copper (II) and Zinc (II) : Synthèses, Crystal Structure

“…Polyfunctional acyclic, symmetric, or asymmetric ligands and their complexes represent an essential component of this chemistry" [1][2][3][4][5][6]. "These ligands are widely used for the synthesis of complexes with very interesting biochemical and physical properties" [7][8][9][10]. "The formation of acyclic ligand complexes depends on the flexibility of the arms bearing the groups having donor sites, the nature of the donor atoms and the complexation properties of the cations and anions playing the role of charge balance" [11][12][13][14].…”

“…"The formation of acyclic ligand complexes depends on the flexibility of the arms bearing the groups having donor sites, the nature of the donor atoms and the complexation properties of the cations and anions playing the role of charge balance" [11][12][13][14]. "These Schiff bases have made it possible to develop molecular materials with specific properties" [15][16][17][18][19]. "This article describes the synthesis of a tetradentate Schiff base obtained by the reaction between 2-hydroxy-3-methoxybenzaldehyde and 1,3-diamine propane.…”