Solvothermal synthesis of anhydrous γ-Mn(CH3COO)2: A weak ferromagnet with an ordering temperature of 40K and spin-glass behavior

α-[Mn(O2CMe)2]: a two-dimensional coordination polymer of the anhydrous manganese acetate polymorphs

“…b-Mn(O 2 CMe) 2 (2) and c-Mn(O 2 CMe) 2 are enantiomorphic, even though their structures were crystallographically resolved [17,18], however, as a diamondoid framework (Fig. 3b) similar to the metal formates [21][22][23][24] reported by Wang et al, this unusual structure was not aware of at that time.…”

“…If the solvothermal reaction is performed at 160°C, extra single crystals of pure phase of 2 [17] are produced; and if the temperature is controlled between 100 and 160°C, the obtained product is a mixture of 1 and 2. Comparing with the literature methods for the preparation of 1 [2,16] and 2 [17,18], the present methods are more feasible to yield the single phases of crystalline 1 and 2.…”

“…Up-to-date, a large number of metal acetates with zero-, one-, two-and three-dimensional structure have been extensively synthesized and characterized [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], in which a lot of anhydrous metal acetates (Mn 2? , Cu 2?…”

“…, and rare-earth metals) are involved [8][9][10][11][12][13][14][15][16][17][18] and almost every metal acetate presents with several anhydrous polymorphs. For example, the anhydrous manganese (II) acetate has been proved to have three polymorphs (a- [2,16], b- [17], and c-[Mn(O 2 CMe) 2 ] [18]), of which the b-and c-[Mn(O 2 CMe) 2 ] have been structurally characterized. However, as the first anhydrous manganese acetate reported in 1967 [16], the structure of anhydrous a-[Mn(O 2 CMe) 2 ] is still unknown because of a lack of suitable single crystal for the X-ray structure analysis.…”