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A novel crystal structure of {tris[4‐(1 H ‐pyrazol‐3‐yl‐κ N 2 )‐3‐azabut‐3‐enyl]amine‐κ N }iron(II) bis(tetrafluoridoborate) methanol monosolvate featuring a low‐spin configuration
Author(s) -
Struch Niklas,
Schnakenburg Gregor,
Lützen Arne
Publication year - 2015
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229615020409
Subject(s) - cationic polymerization , chemistry , crystal structure , crystallography , amine gas treating , molecule , coordination sphere , hydrate , ligand (biochemistry) , methanol , hydrogen bond , solvent , formula unit , spin crossover , metal , stereochemistry , inorganic chemistry , polymer chemistry , organic chemistry , biochemistry , receptor
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(C 18 H 24 N 10 )](BF 4 ) 2 ·CH 3 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.