Gaspar, Ana B.; Carmen Munoz, M.; Moliner, Nicolas; Ksenofontov, Vadim; Levchenko, Georgii; Guetlich, Philipp; Antonio Real, Jose published the article 《Polymorphism and Pressure Driven Thermal Spin Crossover Phenomenon in [Fe(abpt)2(NCX)2] (X = S, and Se): Synthesis, Structure and Magnetic Properties》. Keywords: iron aminobispyridyltriazole selenocyanate thiocyanate complex preparation structure; crystal structure iron aminobispyridyltriazole selenocyanate thiocyanate complex; spin crossover iron aminobispyridyltriazole thiocyanate thiocyanate complex.They researched the compound: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine( cas:1671-88-1 ).COA of Formula: C12H10N6. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1671-88-1) here.
Monomeric [Fe(abpt)2(NCX)2] (X = S (1), Se (2) and abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) were synthesized and characterized. They crystallize in the monoclinic space group P21/n with a 11.637(2), b 9.8021(14), c 12.9838(12) Å, β 101.126(14)°, and Z = 2 for 1, and a 11.601(2), b 9.6666(14), c 12.883(2) Å, β 101.449(10)°, and Z = 2 for 2. The unit cell contains a pair mononuclear [Fe(abpt)2(NCX)2] units related by a center of symmetry. Each Fe atom, located at a mol. inversion center, is in a distorted octahedral environment. Four of the six N atoms coordinated to the Fe(II) ion belong to the pyridine-N(1) and triazole-N(2) rings of two abpt ligands. The remaining trans positions are occupied by two N atoms, N(3), belonging to the two pseudo-halide ligands. The magnetic susceptibility measurements at ambient pressure revealed that they are in the high-spin range in the 2 K-300 K temperature range. The pressure study revealed that compound 1 remains in high-spin as pressure is increased up to 4.4 kbar, where an incomplete thermal spin crossover appears at around T1/2 = 65 K. Quenching experiments at 4.4 kbar showed that the incomplete character of the conversion is a consequence of slow kinetics. Relatively sharp spin transition takes place at T1/2 = 106, 152 and 179 K, as pressure attains 5.6, 8.6 and 10.5 kbar, resp.
《Polymorphism and Pressure Driven Thermal Spin Crossover Phenomenon in [Fe(abpt)2(NCX)2] (X = S, and Se): Synthesis, Structure and Magnetic Properties》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine)COA of Formula: C12H10N6.
Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem