Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 19777-66-3, is researched, SMILESS is C[C@H](N)CN.[H]Cl.[H]Cl, Molecular C3H12Cl2N2Journal, Article, Inorganic Chemistry called On the Nature of the Reversibility of Hydration-Dehydration on the Crystal Structure and Magnetism of the Ferrimagnet [MnII(enH)(H2O)][CrIII(CN)6]·H2O, Author is Yoshida, Yusuke; Inoue, Katsuya; Kurmoo, Mohamedally, the main research direction is manganese chromium complex hydration dehydration crystal structure magnetism.Related Products of 19777-66-3.
The authors report the synthesis, crystal structure, and thermal and magnetic properties of the two-dimensional achiral soft ferrimagnet [MnII(enH)(H2O)][CrIII(CN)6]·H2O (1), en = 1,2-diaminoethane, as well as the recyclability of the dehydration and rehydration and their influence on the crystal structure and its magnetic properties. Unlike [Mn(S-pnH)(H2O)][Cr(CN)6]·H2O (2S, pn = 1,2-diaminopropane), which is a chiral (P212121) enantiopure ferrimagnet (TC = 38 K), 1 crystallizes in the achiral orthorhombic Pcmn space group, having a similar two-dimensional square network of Mn-Cr with bridging cyanide, and 1 behaves also as a soft ferrimagnet (TC = 42 K). X-ray diffraction experiments on a single crystal of 1 indicate a transformation from a single crystal to an amorphous phase upon dehydration and partial recovery of its crystallinity upon rehydration. The dehydrated phase 1-DP exhibits long-range ordering at 75 K to a ferrimagnetic state and coercive field at 2 K of 100 Oe, which are a higher critical temperature and coercive field than for the virgin sample (HC = 60 Oe). Thermogravimetric analyses indicate that the crystallinity deteriorates upon hydration-dehydration cycling, with persistence toward the amorphous phase, as also seen by magnetization measurements. This effect is associated with an increase of statistical disorder inherent in the dehydration-rehydration process. X-ray powder diffraction suggests that 1-DP may retain order within the layers but loses coherence in the stacking of the layers.
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Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider