HPLC of Formula: 18583-60-3. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Potassiumtris(1-pyrazolyl)borohydride, is researched, Molecular C9H10BKN6, CAS is 18583-60-3, about Heterodinuclear Complexes Containing d- and f-block Elements: Synthesis, Structural Characterization, and Metal-Metal Interactions of Novel Chromium(III)-Lanthanide(III) Compounds Bridged by Oxalate. Author is Sanada, Takayuki; Suzuki, Takayoshi; Yoshida, Takafumi; Kaizaki, Sumio.
The reaction of Ln(III) ions with a tripodal ligand HBpz3- (hydrotris(pyrazol-1-yl)borate) and a complex ligand [Cr(acac)2(ox)]- (acac- = acetylacetonate, ox2- = oxalate) in aqueous solution afforded the novel 3d-4f heterodinuclear complexes [(acac)2Cr(ox)Ln(HBpz3)2] (Ln = Eu (1), Gd (2), Tb (3), Yb (4), Lu (5)). 4 Crystallizes in monoclinic space group P2/n, with a 8.594(3), b 18.538(4), c 12.093(2) Å, β 93.71(2)°, and Z = 2. Yb coordinates in an eight-coordinate distorted square antiprismatic geometry. The intramol. Cr···Yb distance is 5.631(1) Å. The magnetic susceptibility data for 2 showed that the CrIII-GdIII interaction is weakly antiferromagnetic with an exchange coupling constant JCrGd = -0.09 cm-1. The luminescence measurements demonstrated the energy transfers for both Ln(III) → Cr(III) and Cr(III) → Ln(III), of which the degree of emission quenching depends on the energy gap of the excited levels in two metal centers. These results reveal that the metal-metal interactions between Cr(III) and Ln(III) are very weak in magnetic interaction but are strong from the viewpoint of energy transfer.
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