A ferromagnetic Ni(ii)–Cr(iii) single-chain magnet based on pentagonal bipyramidal building units

Abstract

The first example of a ferromagnetic Ni(ii)–Cr(iii) single-chain magnet fashioned using pentagonal bipyramidal Ni(ii) complexes with Ising-type anisotropy.

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

“…It is well known that CPs can be obtained by the combination of metal ions as a node and as the connecting rod can be employed by multidentate organic/inorganic ligands. The Schiff bases derived from 2,6-diacetylpyridine are good candidates for elaboration of magnetic homo- and/or heterometallic CPs [ 8 , 9 , 10 , 11 , 12 ]. The analysis of the Cambridge Structural Database (CSD, version 2020.2.0) revealed 20 transition metal CPs with this type of ligands [ 13 ].…”

“…The analysis of the Cambridge Structural Database (CSD, version 2020.2.0) revealed 20 transition metal CPs with this type of ligands [ 13 ]. In most of them, the metal atoms are interconnected by inorganic bridges, such as CN − [ 9 , 12 , 14 ], N 3 − [ 8 ], [Ni(CN) 4 ] 2 − [ 11 , 14 , 15 ], [Fe(CN) 6 ] 3 − [ 16 , 17 , 18 ] and [Mn(CN) 6 ] 3 − [ 19 ], but only in two examples the polymer dimensionality was realized by the ligand terminal arms, isonicotinoylhydrazone [ 10 ] and 2-aminobenzoylhydrazone [ 20 ]. The combination of various 2,6-diacetylpyridine Schiff bases and Zn(II)/Cd(II) metals led to 26 discrete coordination compounds with catalytic [ 21 , 22 ], magnetic [ 23 ], nonlinear optics [ 22 ], photoluminescent [ 24 ] and biological activity [ 25 ].…”

Trinuclear Cyanido‐Bridged [Cr2Fe] Complexes: To Be or not to Be a Single‐Molecule Magnet, a Matter of Straightness

“…[28][29][30][31][32] Following this approach, SCMs with nearly collinear local anisotropy directions have been obtained from heptacoordinated [CrL N3O2R (CN) 2 ] À (R = Ph, NH 2 , Scheme 1) and PBP Fe II or Ni II derivatives. [33,34] These cyanido-bridged systems are characterized by ferromagnetic interactions for CrFe and CrNi systems while they are antiferromagnetic in CrMn species. Interestingly, a trimetallic [Cr 2 Fe] complex with a single anisotropic center, Fe II , was shown to behave as a SMM in zerofield.…”

Synthesis, crystal structure and Hirshfeld surface analysis of bis{2-[(pyridin-2-yl)amino]pyridinium} tetracyanonickelate(II)

“…Transition-metal coordination compounds, where CN À ligands play the main structure-forming role, so-called cyanocarbanion or cyanometallate complexes, have been the subject of interest for many years, in particular due to their magnetic properties (Ferlay et al, 1995;Bretosh et al, 2020;Benmansour et al, 2012;Setifi et al, 2009;Yuste et al, 2009;Addala et al, 2015), including spin-crossover behavior (Benmansour et al, 2010;Yoon et al, 2011). The square-planar tetracyanonickelate(II) anion [Ni(CN) 4 ] 2has proved to be very versatile and diverse in both coordination chemistry and magnetism.…”