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A Direct Three‐Component Reaction for the Isolation of a Nonanuclear Iron(III) Phosphonate
Author(s) -
Goura Joydeb,
Liu Junjie,
Goddard Paul,
Chandrasekhar Vadapalli
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402371
Subject(s) - chemistry , phosphonate , pivalic acid , triethylamine , anhydrous , ferric , antiferromagnetism , inorganic chemistry , crystallography , magnetism , ligand (biochemistry) , catalysis , organic chemistry , biochemistry , physics , receptor , quantum mechanics , condensed matter physics
Abstract The synthesis, structure, and magnetism of a nonanuclear iron(III) phosphonate, [Fe 9 III (μ 3 ‐O) 4 (O 3 PC 5 H 9 ) 3 (O 2 CCMe 3 ) 13 ] · (EtOH) 0.5 · (Et 2 O) 0.5 ( 1 ), is described. Compound 1 was obtained in the direct reaction of anhydrous ferric chloride, cyclopentylphosphonic acid, and pivalic acid in the presence of triethylamine. Compound 1 possesses a distorted icosahedral structure; nine of the vertices are occupied by Fe III , whereas three others are occupied by the phosphorus atoms of the cyclopentylphosphonate ligand. Mössbauer spectroscopy of 1 confirms the presence of high‐spin Fe III . Low‐temperature magnetic studies reveal the presence of strong antiferromagnetic coupling between the Fe 3+ ions.