ISSN:
1572-901X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary Imidazoline-2-thione (imtH 2) and 1-methylimidazoline-2-thione (mimtH) react with FeCl2·4H2O in rigorously anhydrous media producing complexes of general formula Fe(LH)2Cl2. Infrared and electronic spectra as well as room temperature magnetic moments are consistent with mononuelear, pseudotetrahedral species. The crystal structure of [Fe(mimHH)2Cl2] confirms this arrangement. The complex crystallises in a triclinic unit cell (a=7.376(2),b=7.595(2),c=15.043(4) Å. α=76.80(1)°, β=79.60(1)°, γ=61.90(1)°; V=721.13 Å3; space group=P1, Z=2). Final conventional R from 2267 observed data (F 〉4σ(F)) is 0.0271. Average bond lengths are 2.353 Å (Fe−S) and 2.265 Å (Fe−Cl). Angles at the metal range from 91.5(1)° to 114.5(1)°. Thermal degradation of the complexes in flowing air involves sequential loss of halogen and ligand with α-Fe2O3 as the final product. The decomposition is exothermic in flowing dinitrogen.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01225127
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