Influence of Hydrogen Bonding on the Hysteresis Width in Iron(II) Spin‐Crossover Complexes

Solvent Influence on the Magnetic Properties of Iron(II) Spin‐Crossover Coordination Compounds with 4,4′‐Dipyridylethyne as Linker

“…As has been shown previously, [8][9][10][11][12][13][14][15][16] the solvent has a significant influence on the SCO behaviour of this type of compound. Depending on the solvent used and preparation method, different iron(II) complexes were obtained.…”

“…This could be the case if the complex precipitates either in the high-or low-spin state and has already been observed for other SCO complexes of this ligand type. [8,14] Scheme 1 displays the general pathway for the synthesis of the iron(II) complexes. The complexes all precipitated as very dark, microcrystalline materials with varying solvent contents according to elemental analysis, mass spectrometry, thermogravimetric analysis (TGA; see Figure S1 in the Supporting Information), and IR spectroscopy.…”

“…The OH groups of the coordinating ethanol molecules in the asymmetric unit are donors for hydrogen bonds with a carbonyl oxygen of a neighbouring molecule (O17-H17A···O60, O57-H57A···O55 and O64-H64···O15). Through these hydrogen bonds, the dimers form zig-zag chains along the vector [1][2][3][4][5][6][7][8][9][10][11]. The details of the hydrogen bonds are summarised in Table 4 and the molecular packing of the compound in the crystal is shown in Figure 3.…”

“…[7] For the complexes investigated by our group, this is most commonly observed for coordination polymers, for which different solvents used in the synthesis often lead to different magnetic properties. [8][9][10][11][12][13][14][15][16] In contrast, such changes are rare for mononuclear complexes. [17] So far, how-method but in different solvents led to the same compound exhibiting the same three-step spin crossover independent of the magnetic properties of the solvated species.…”

Spin-Crossover Behavior of Hofmann-Type-Like Complex Fe(4,4’-bipyridine)Ni(CN)4·nH2O Depending on Guest Species

“…In the case of the influence of hydrogen bonding on the hysteresis width in iron(II) spin crossover complexes, Weber el al. reported an increase of hysteresis width after deuteration [43]. This is much more pronounced and remarkable for the presence case with (CH 3 ) 2 CO.…”