Kowalkowska-Zedler, D.; Dolega, A.; Nedelko, N.; Lyszczek, R.; Aleshkevych, P.; Demchenko, I.; Luczak, J.; Slawska-Waniewska, A.; Pladzyk, A. published the artcile< Structural, magnetic and spectral properties of tetrahedral cobalt(II) silanethiolates: a variety of structures and manifestation of field-induced slow magnetic relaxation>, Name: Pyridin-4-ylmethanamine, the main research area is cobalt silanethiolate aminopyridine aminomethylpyridine complex preparation magnetic property; thermal stability cobalt silanethiolate aminopyridine aminomethylpyridine; crystal structure cobalt silanethiolate aminopyridine aminomethylpyridine.
Blue crystals of five heteroleptic cobalt(II) silanethiolates 1-5 have been obtained by the reaction of [Co{SSi(tBuO)3}2(NH3)]2 with aminopyridines and aminomethylpyridines at an appropriate molar ratio and their structural, spectral, thermal and magnetic properties have been established and described. All complexes 1-5 contain Co(II) ions in a tetrahedral CoN2S2 environment formed by (tBuO)3SiS- residues and pyridines and present variable structures. Complexes 1-3 are mononuclear [Co{SSi(tBuO)3}2(L1)2] (L1 = 2-aminopyridine 2AP, 3-aminopyridine 3AP, and 4-aminopyridine 4AP). The application of 3AMP and 4AMP (3-aminomethylpyridine and 4-aminomethylpyridine) allows either dinuclear complex 4 [Co{SSi(tBuO)3}2(μ-3AMP)]2 or 1D coordination polymer 5 with the formula of [Co{SSi(tBuO)3}2(μ-4AMP)]n to be obtained. The mol. structures of 1-5 were determined by single-crystal X-ray and powder diffraction, UV-vis and FTIR spectrocopy for solid samples and their thermal properties were characterized by TG-DSC and TG-FTIR methods. The dc and ac magnetic and EPR studies of polycrystalline samples have been performed. For all complexes, the obtained data show a behavior typical of paramagnetic high-spin Co(II) ions in a tetrahedral geometry, with a considerable contribution of the ZFS effect in a low temperature range. All complexes were also probed for SIM behavior. The modeling of the magnetic and EPR data was done for samples 1, 3, 4 and 5 to estimate ZFS parameters. The obtained results imply a neg. value of the axial parameter D in complex 4 and pos. D values for the rest of the compounds A comparative magneto-structural anal. of complexes 4 and 5 points to the high sensitivity of the single-ion magnetic anisotropy of tetrahedral Co(II) complexes to subtle changes in the first and second coordination spheres of Co(II) ions.
Dalton Transactions published new progress about Aminopyridines Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation) (cobalt complexes). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Name: Pyridin-4-ylmethanamine.