Premium
Tetrachloroferrate(III) Complexes Containing Some Heteroaromatic Organic Cations: Structures and Magnetic Properties
Author(s) -
James Bruce D.,
Mrozinski Jerzy,
Klak Julia,
Skelton Brian W.,
White Allan H.
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200800429
Subject(s) - superexchange , chemistry , antiferromagnetism , quinoline , crystallography , paramagnetism , crystal structure , stoichiometry , hydrogen bond , inorganic chemistry , molecule , ion , condensed matter physics , organic chemistry , physics
The crystal structures of tetrachloroferrate(III) complexes having stoichiometry (BH) + [FeCl 4 ] − (where B = iso quinoline and 4‐aminopyridine) were determined at 100 K. While weak interactions, particularly N–H···Cl hydrogen bonds, are evident in the structures, distances between the Fe(III) centers are quite long in both cases. The structure of the compound with B = quinoline was compared with that previously established at room temperature, and showed that neither solid‐solid nor magnetic phase transitions occurred in this temperature range. Magnetic measurements on the paramagnetic powders indicate weak antiferromagnetic interactions transmitted through the crystal lattice, giving rise to Néel temperatures that are significantly below 10 K. Comparisons are made with other characterized [FeCl 4 ] − compounds having similar organic base cations, enabling clarification of the superexchange mechanism.