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Reactivity of Coordinatively Unsaturated Trivalent Chromium Complexes with Sulfur: Preparation of Novel Sulfide‐bridged Dinuclear Cr IV Derivatives
Author(s) -
Reardon Damien,
Kovacs Istvan,
Ruppa Kamalesh B. P.,
Feghali Khalil,
Gambarotta Sandro,
Petersen Jeffrey
Publication year - 1997
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.19970030915
Subject(s) - homoleptic , chemistry , chromium , amide , reactivity (psychology) , crystallography , sulfide , sulfur , paramagnetism , magnetic susceptibility , inorganic chemistry , magnetic moment , ab initio , ab initio quantum chemistry methods , molecule , metal , organic chemistry , condensed matter physics , medicine , physics , alternative medicine , pathology , quantum mechanics
The homoleptic Cr III amide complexes [(RR′N) 3 Cr] [R = R′ = cyclohexyl ( 1a ); R = adamantyl, R′ = 3,5‐Me 2 Ph ( 1 b )] were prepared and characterized. Reactions with elemental sulfur produced the corresponding dinuclear complexes [{(RR′N) 2 Cr} 2 (μ‐S) 2 ] ( 2 ) through loss of one amide group. These two new dinuclear Cr IV species are paramagnetic with magnetic moments lower than expected for the d 2 electronic configuration of Cr IV . Magnetic measurements and ab initio calculations were carried out to elucidate the nature of magnetic interactions in these dinuclear systems. The molecular structures of 1a and 2a were elucidated by X‐ray crystal structures.