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Synthesis, Structural Characterization, and Magnetic Properties of the Heteroleptic Dinuclear Nickel Selenite Complex [{Ni(TMEDA)SeO 3 } 2 ]
Author(s) -
Delferro Massimiliano,
Graiff Claudia,
Marchiò Luciano,
Elviri Lisa,
Mazzani Marcello,
Riccò Mauro,
Predieri Giovanni
Publication year - 2011
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.201100385
Subject(s) - chemistry , homoleptic , nickel , crystallography , ethylenediamine , steric effects , hydrogen bond , crystal structure , molecule , selenium , ligand (biochemistry) , tetramethylethylenediamine , inorganic chemistry , stereochemistry , metal , polymer chemistry , organic chemistry , biochemistry , receptor
The reaction of Ni(NO 3 ) 2 · 6H 2 O with Na 2 SeO 3 in the presence of tetramethylethylenediamine (TMEDA) in a water/ethanol mixture yielded the heteroleptic complex [{Ni(TMEDA)SeO 3 } 2 ] ( 1 ). Single‐crystal X‐ray diffraction analysis showed that complex 1 consists of a dinuclear species in which the two nickel atoms are held together by two bridging selenito anions. The crystal packing of 1 is determined by networks of hydrogen bonds, involving cocrystalized water molecules and the oxygen atoms of the bridging SeO 3 2– groups. The two nickel ions in 1 exhibit antiferromagnetic coupling with J = –25.7 ± 0.1 cm –1 , in good agreement with DFT calculations. In addition, when a less sterically hindered ancillary ligand, such as ethylenediamine (en), was used, the homoleptic complex [Ni(en) 3 ](SeO 3 ) ( 2 ) was obtained.
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