Reference of Bis(pyridin-2-ylmethyl)amineIn 2020 ,《Influence of ligand field on magnetic anisotropy in a family of pentacoordinate CoII complexes》 appeared in Dalton Transactions. The author of the article were Acharya, Joydev; Sarkar, Arup; Kumar, Pawan; Kumar, Vierandra; Flores Gonzalez, Jessica; Cador, Olivier; Pointillart, Fabrice; Rajaraman, Gopalan; Chandrasekhar, Vadapalli. The article conveys some information:
A family of mononuclear pentacoordinated CoII complexes, [Co(L)Cl2]·CH3OH (1), [Co(L)Br2] (2) and [Co(L)(NCS)2] (3) (L is 1-mesityl-N,N-bis(pyridin-2-ylmethyl)methanamine) were synthesized and characterized. In these complexes, the neutral non-planar ligand, L, binds to three coordination sites around the metal center while two others are bound by anionic halide/pseudo halide ligands. The coordination geometry of the complexes is dictated by the coordinated anionic ligands. Thus, the coordination geometry around the metal ion is distorted trigonal bipyramidal for complexes 1 and 3, while it is distorted square pyramidal for complex 2. Ab initio CASSCF/NEVPT2 calculations on the complexes reveal an easy plane magnetic anisotropy with the D and E/D values being, 13.3 and 0.14 cm-1 for 1; 36.1 and 0.24 cm-1 for 2 and ±8.6 and 0.32 cm-1 for 3. These values are in good agreement with the values that were extracted from the exptl. d.c. data. AC magnetic measurements reveal a field-induced slow relaxation of magnetization. However, clear maxima in the out-of-phase susceptibility curves were not observed for 1 and 3. For complex 2, peak maxima were observed when the measurements were carried out under an applied field of 1400 Oe which allowed an anal. of the dynamics of the slow relaxation of magnetization. The relaxation is mainly controlled by the Raman and direct processes with the values of the parameters found to be: B = 0.77(15) s-1 K-6.35, n = 6.35(12) and A = 3.41(4) x 10-10 s-1 Oe-4 K-1 and m = 4 (fixed). The ab initio calculation which showed the multifunctional nature of the electronic states of the complexes justifies the absence of zero-field SIM behavior of the complexes. The magnitude and sign of the D and E values and their relation with the covalency of the metal-ligand bonds was analyzed by the CASSCF/NEVPT2 as well as AILFT calculations In the experiment, the researchers used many compounds, for example, Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0Reference of Bis(pyridin-2-ylmethyl)amine)
Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0) is a secondary amine with two picolyl substituents. The compound is a tridentate ligand in coordination chemistry and commonly used to produce Zn-based chemosensors/probes, such as Zinpry.Reference of Bis(pyridin-2-ylmethyl)amine