| Abstract: | A mononuclear iron(II) complex with the tripodal ligand bis(pyridin‐2‐ylmethyl)(quinolin‐2‐ylmethyl)amine (dpqa) has been synthesized and structurally characterized, namely bis(pyridin‐2‐ylmethyl)(quinolin‐2‐ylmethyl)amine‐κ4N,N′,N′′,N′′′]bis(thiocyanato‐κS)iron(II), Fe(NCS)2(C22H20N4)], exhibits a three‐dimensional supramolecular network viaπ–π interactions and S...H—C hydrogen‐bonding interactions between adjacent FeII centres. Temperature‐dependent magnetic measurements under different external pressures and X‐ray diffraction measurements indicate that all the FeII centres in this complex retain a high‐spin state upon cooling from 300 to 2 K. The surprising absence of spin‐crossover behaviour for this mononuclear iron(II) complex is attributed to the steric hindrance originating from the substituted quinoline ring in the dpqa ligand. |
