32787-84-1Relevant articles and documents
Dinuclear and 1D iron(III) Schiff base complexes bridged by 4-salicylideneamino-1,2,4-triazolate: X-ray structures and magnetic properties
Herchel, Radovan,Pavelek, Lubomir,Travnicek, Zdenek
, p. 11896 - 11903 (2011)
Four new iron(III) complexes were obtained by the reaction of 4-salicylideneamino-1,2,4-triazole (Hsaltrz) and selected dinuclear μ-oxo-bridged iron(iii) Schiff base complexes [{FeL4} 2(μ-O)], where L4 represents a terminal tetradentate dianionic Schiff-base ligand. X-ray structural analysis revealed a novel bridging mode of κN,κO of the saltrz ligand to form dinuclear complexes [{Fe(salen)(μ-saltrz)}2]·CH3OH (1) (H2salen = N,N′-ethylenebis(salicylimine)) and [{Fe(salpn)(μ-saltrz)}2] (2) (H2salpn = N,N′-1,2-propylenbis(salicylimine)), whereas one-dimensional (1D) zig-zag chains were formed in the case of [{Fe(salch)(μ-saltrz)}·0.5CH 3OH]n (3) (H2salch = N,N′- cyclohexanebis(salicylimine)) and [Fe(salophen)(μ-saltrz)]n (4) (H2salophen = N,N′-o-phenylenebis(salicylimine)). It was also shown that the rigidity of the terminal ligand L4 can be considered as the key factor for the molecular dimensionality of the products. The thorough magnetic analysis based on SQUID experiments, including the isotropic exchange and the zero-field splitting of both temperature and field dependent data, was performed for dimeric (1 and 2) and also for polymeric compounds (3 and 4) and revealed weak antiferromagnetic exchange mediated by the saltrz anions with much larger D-parameter (D ? J). The Royal Society of Chemistry 2011.
Complete and Versatile Post-Synthetic Modification on Iron-Triazole Spin Crossover Complexes: A Relevant Material Elaboration Method
Enríquez-Cabrera, Alejandro,Ridier, Karl,Salmon, Lionel,Routaboul, Lucie,Bousseksou, Azzedine
supporting information, p. 2000 - 2016 (2021/05/17)
In this paper we study the post-synthetic modification (PSM) reaction on solid spin crossover (SCO) [Fe(NH2trz)3]X2 (X=NO3, OTs, Cl, SO4, BF4) complexes with different substrates. The wide access to a diversity of functionalized complexes with imine, amide and carbamide groups from the same amino parent compound demonstrates the synthetic approach value of this method. The as-obtained post-synthetic complexes were studied by IR, solid NMR, elemental analyses, and powder X-ray diffraction, and compared to the corresponding compounds obtained by direct synthesis (DS) routes. Moreover, after digestion of the complexes obtained by PSM reactions, the free ligands were characterized by NMR in solution, which allowed us to indirectly confirm the formation of complexes we wished to synthesize. The study reveals in numerous cases that a complete post-synthetic modification is possible despite the structural cohesion that is established between the 1D coordination chains within these materials. Spin crossover properties of some complexes obtained by both methods are also reported and compared.
Synthesis and biological screening of some new thiophene and pyrazole containing styrylchromones and pyrazoles
Mhaske, Sadhana D.,Takate, Sushama J.,Dhawale, Rhushikesh N.,Akolkar, Hemantkumar N.,Randhavane, Pratibha V.,Karale, Bhausaheb K.
, p. 89 - 97 (2019/01/16)
Series of brominated thiophene anchored 2-styrylchromones and styrylpyrazoles were synthesized using Baker-Venkataraman transformation. The structures of newly synthesized compounds were confirmed by spectral techniques such as infrared, 1H nuc
