Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, the author is Fritsky, Igor O. and a compound is mentioned, 253-52-1, Phthalazine, introducing its new discovery. 253-52-1
Spin crossover in 2D iron(ii) phthalazine cyanometallic complexes
Two new 2D spin-crossover (SCO) analogues of Hofmann clathrates of composition [Fe(phth)2MII(CN)4] (where phth = phthalazine; MII = Pd, Pt) have been synthesized and their structures and switchable behaviour have been characterized. Single-crystal X-ray analysis reveals that the Pt and Pd derivatives contain FeII centres equatorially surrounded by four equivalent mu4-[MII(CN)4]2- groups. Two crystallographically equivalent phthalazine (phth) ligands occupy the axial positions of each FeII site, completing its octahedral coordination environment. The stabilization of these structures is realized via supramolecular C-H?M interactions and pi-pi stacking. Temperature-dependent magnetic susceptibility measurements showed that Pt (T1/2? = 211 K and T1/2? = 218 K) and Pd (T1/2? = 202 K and T1/2? = 207 K) derivatives display cooperative spin crossover with narrow thermal hysteresis loops. In addition, spin crossover in these complexes was characterized by optical measurements, differential scanning calorimetry, and IR and Raman spectroscopy. This research shows that the use of phthalazine leads to the production of new SCO systems with attractive transition characteristics and opens up new perspectives for the design of switchable complexes based on fused bicyclic azine ligands.
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Reference£º
Phthalazine – Wikipedia,
Phthalazine | C8H6N154 – PubChem