COA of Formula: C12H10N6. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine, is researched, Molecular C12H10N6, CAS is 1671-88-1, about Novel hybrid spin systems of 7,7′,8,8′-tetracyanoquinodimethane (TCNQ) radical anions and 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole (abpt). Crystal structure of [Fe(abpt)2(TCNQ)2] at 298 and 100 K, Moessbauer spectroscopy, magnetic properties, and infrared spectroscopy of the series [MII(abpt)2(TCNQ)2] (M = Mn, Fe, Co, Ni, Cu, Zn). Author is Kunkeler, Paul J.; van Koningsbruggen, Petra J.; Cornelissen, Joost P.; van der Horst, Andre N.; van der Kraan, Adri M.; Spek, Anthony L.; Haasnoot, Jaap G.; Reedijk, Jan.
[Fe(abpt)2(TCNQ)2], where TCNQ is the radical anion 7,7′,8,8′-tetracyanoquinodimethane and abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, is an Fe(II) complex containing coordinated radical anions which undergoes a thermally induced spin-crossover with Tc = 280 K. Variable-temperature magnetic susceptibility (7-460 K) and 57Fe Moessbauer spectroscopy data give evidence for a complete S = 2 (high-spin) ↔ S = 0 (low-spin) transition, taking place gradually, without hysteresis. The x-ray structure was determined at 298 K and 100 K. The compound is triclinic, space group P1̅, with a 9.277(2), b 9.876(3), c 12.272(2) Å, α 69.52(2), β 86.92(2), and γ 81.73(2)° at 298 K and a 9.236(2), b 9.684(1), c 12.137(2) Å, α 69.26(1), β 87.53(2), and γ 82.38(1)° at 100 K with Z = 1. Two abpt ligands coordinating via pyridyl-N1A and triazole-N1 are in the equatorial positions. Fe-N1 and Fe-N1A distances are 2.08(1) and 2.12(1) Å for 1 and 2.00(2) and 2.02(1) Å for 2, resp. TCNQ mols. coordinate axially at remarkably short distances i.e., Fe-N1T = 2.16(1) Å for 1 and 1.93(1) Å for 2. The TCNQ mols. are stacked in pairs yielding diamagnetic entities. The FTIR spectra (100-300 K) show that the TCNQ νCN vibrations are a fingerprint for the different spin states. In the isostructural [MII(abpt)2(TCNQ)2] (M = Mn, Fe, Co, Ni, Cu, Zn) compounds, the νCN absorptions show a shift to higher frequencies as a function of the crystal field stabilization energy. Above Tc, the Cu(II)-doped Fe(II) species shows a broad signal with g⊥ = 2.09 and g‖ = 2.25 and hyperfine structure (A‖ = 180 G). At Tc and below, the spectrum becomes better resolved and now shows superhyperfine structure (AN‖ = 16 G; nine lines). Above Tc, the Mn(II)-doped Fe(II) compound shows a very broad signal at g = 2.00. The spectrum sharpens at Tc to give a clearly resolved spectrum corresponding to a magnetically isolated Mn(II) ion in a tetragonal environment. The signal is split by the zero-field splitting, yielding major signals at g = 1.6 and g = 5.5 and six hyperfine lines (A‖ = 80 G) that are clearly visible on both signals.
As far as I know, this compound(1671-88-1)COA of Formula: C12H10N6 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem