Hydrothermal Synthesis and Structural Characterization of the (C<i><sub>n</sub></i>H<sub>2</sub><i><sub>n</sub></i><sub>+6</sub>N<sub>2</sub>)[Mn<sub>3</sub>(HPO<sub>3</sub>)<sub>4</sub>] (<i>n</i> = 3−8) New Layered Inorganic−Organic Hybrid Manganese(II) Phosphites. Crystal Structure and Spectroscopic and Magnetic Properties of (C<sub>3</sub>H<sub>12</sub>N<sub>2</sub>)[Mn<sub>3</sub>(HPO<sub>3</sub>)<sub>4</sub>]
收藏资源简介：
The (CnH2n+6N2)[Mn3(HPO3)4] (n = 3−8) compounds have been prepared by hydrothermal synthesis and characterized by X-ray diffraction data and spectroscopic techniques. The crystal structure of (C3H12N2)[Mn3(HPO3)4] has been solved from single-crystal X-ray diffraction. The unit-cell parameters are a = 9.502(1), b = 5.472(1), c = 14.523(4) Å, β = 95.01(3)°, monoclinic, C2/m, with Z = 2. The compound shows a layered structure stacked along the c-axis with the alkyldiammonium cations placed in the interlayer space. The sheets are formed by Mn3O12 trimer units extended in the ab-plane and connected by (HPO3)2- anions. The study of the (CnH2n+6N2)[Mn3(HPO3)4] (n = 4−8) phases by X-ray powder diffraction indicates an isotype relation with the propanediammonium compound. The Dq and Racah parameters calculated for (C3H12N2)[Mn3(HPO3)4] are Dq = 880, B = 660 and C = 3610 cm-1. The ESR spectra show isotropic signals with a g-value of 2.008. Magnetic measurements indicate the presence of antiferromagnetic interactions inside the [Mn3(HPO3)4]2- sheets. The J/K value has been estimated to be −15 K by considering that the system behaves like an isolated trimer at high temperatures.
