In an article, author is Wu, Tao, once mentioned the application of 4803-74-1, Name: 5,6-Dimethoxy-2-(pyridin-4-ylmethylene)-2,3-dihydro-1H-inden-1-one, Name is 5,6-Dimethoxy-2-(pyridin-4-ylmethylene)-2,3-dihydro-1H-inden-1-one, molecular formula is C17H15NO3, molecular weight is 281.31, MDL number is MFCD08458868, category is pyridine-derivatives. Now introduce a scientific discovery about this category.
Correlating magnetic anisotropy with the subtle coordination geometry variation of a series of cobalt(ii)-sulfonamide complexes
Systematic substitution on the N-(pyridine-2-ylmethyl)-sulfonamide ligand leads to the subtle variation of the CoN4 coordination geometry in a series of cobalt(ii) complexes sharing the common formula of Co[R-1(C6N2H5)R-2](2), where R-1 = H, R-2 = 4-tert-butylphenylsulfonyl ((t)Buphs) 1, R-2 = 5-(dimethylamino)naphthalen-1-ylsulfonyl (DNps) 2, R-2 = mesitylsulfonyl (Ms) 3, R-2 = tosyl (Tos) 4, and R-2 = naphthalen-1-ylsulfonyl (Nps) 5; R-1 = Me, R-2 = (t)Buphs 6. Magnetic studies show that the axial zero-field splitting parameter (D) is subtlely correlated with the coordination geometric variation subjected to the peripheral substituted groups. Specifically, the distortion from the ideal tetrahedral geometry (T-d symmetry) to the seesaw geometry (D-2d symmetry) increases uniaxial magnetic anisotropy. The degree of distortion measured by the continuous symmetry measure (CSM) shows that a narrow interval of CSM (6-7), which corresponds to 14-15 degree deviation from the standard tetrahedron, is ideal for maximising the D value in this coordination geometry, while the direction of the D tensor is less sensitive to such a structural variation.
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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem