A novel crystal structure of {tris[4‐(1H‐pyrazol‐3‐yl‐κN2)‐3‐azabut‐3‐enyl]amine‐κN}iron(II) bis(tetrafluoridoborate) methanol monosolvate featuring a low‐spin configuration. Issue 12 (1st December 2015)

• Record Type: Journal Article
• Authors: Struch, Niklas; Schnakenburg, Gregor; Lützen, Arne
• Is Part Of: Acta crystallographica. Volume 71:Issue 12(2015:Dec.)
• Page Start: 1048
• Page End: 1052
• Publication Date: 2015-12-01
• Subjects: iron(II) complexes -- spin‐crossover -- crystal structure -- low‐spin configuration; Crystallography -- Periodicals; Crystals -- Periodicals; 548.3
• DOI: 10.1107/S2053229615020409
• Languages: English
• ISSNs: 2053-2296

Abstract

Abstract : Mononuclear complexes are good model systems for evaluating the effects of different ligand systems on the magnetic properties of iron(II) centres. A novel crystal structure of the title compound, [Fe(C18 H24 N10 )](BF4 )2 ·CH3 OH, with one molecule of methanol per formula unit exhibits a strictly sixfold coordination sphere associated with a low‐spin configuration at the metal centre. The incorporated methanol solvent molecule promotes extended hydrogen‐bonding networks between the tetrafluoridoborate anions and the cationic units. A less constrained crystal structure regarding close contacts between the tetrafluoridoborate anions and the cationic units allows a spin transition which is inhibited in the previously published hydrate of the title compound.