18998-50-0Relevant academic research and scientific papers
FeII Complexes with Triple N1,N2-Triazole Bridge Schiff Base Ligand: Antiferromagnetic Dimer vs. Spin Conversion Trimer
Li, Ai-Min,Hochd?rffer, Tim,Wolny, Juliusz A.,Schünemann, Volker,Rentschler, Eva
, p. 4190 - 4199 (2018)
Based on the p-tolyl functionalized Schiff base 1,2,4-triazole ligand 4-(p-tolylidene-amino)-4H-1,2,4-triazole (toltrz), a series of three triazole-bridged FeII complexes have been prepared. The compounds represent a range of dinuclear and trinuclear species, with μ2-N1,N2-triazole bridges linking the FeII centers. M?ssbauer spectroscopy and magnetic susceptibility measurements reveal a gradual single-step spin crossover (SCO) behavior for the trimeric compound 3 on the central FeII site. Single-crystal X-ray diffraction at 120 K confirms that the central FeII site undergoes a HS to LS transition while the peripheral FeII remain in HS state (HS = high spin; LS = low spin). Compounds 1 and 2 are isostructures with different terminal ligand XCN (X = S, Se), these two compounds stay in high spin state over the whole temperature range but display weak antiferromagnetic exchange coupling.
An Efficient Synthesis and Antibacterial Activity of Some Novel 2-Azetidinone Derivatives of 4H-1,2,4-Triazoles Under Mild Conditions
Khan, Takallum,Yadav, Ritu,Gound, Surendra Singh
supporting information, p. 1042 - 1047 (2018/02/23)
We have synthesized the novel 2-azetidinone derivatives by using Schiff bases of 1,2,4-triazoles via a single step protocol. We used DABCO as a good homogenous, ecofriendly, highly reactive, easy to handle, and nontoxic catalyst. In?DABCO catalyzed synthesis of active 2-oxo-azetidine, a highly electrophilic ketene intermediate can react with weakly nucleophilic (N═CH) linkage, which is used as the precursor for the cycloaddition reaction to deliver the desired products in excellent yields with protic solvents. In addition, the DABCO as an economically viable and readily available catalyst is soluble in almost all solvents and their salts easily filtered off from the reaction medium. Moreover, this new synthetic protocol features high conversion in green solvents and a straightforward procedure.
