571194-20-2Relevant academic research and scientific papers
Antiferromagnetic complexes with metal-metal bonds. Part XXX. Synthesis and molecular structures of the antiferromagnetic adducts [Cp′Cr(μ-SPh)]2(μ3-Se).ML (Cp′=η5-CH3C5H4, ML=Fe3(μ3-S)2(CO)8
Pasynskii,Skabitski,Torubaev, Yu V.,Semenova,Novotortsev,Ellert,Lyssenko
, p. 91 - 100 (2003)
The photochemical reactions of antiferromagnetic heterochalcogenic complex [Cp′Cr(μ-SPh)]2(μ-Se) (1) (Cp′=η5-CH3C5H4) with Fe3(μ3-Se)2(CO)9 or Mn2(CO)10 at room temperature gives new mixed-metal heterochalcogenic clusters [Cp′Cr(μ-SPh)]2(μ3-Se)Fe3 (μ3-Se)2(CO)8 (2), [Cp′Cr(μ-SPh)]2(μ3-Se)Mn2 (CO)9 (3) and [Cp′Cr(μ-SPh)]2 (μ4-Se)Mn2(CO)8 (4) which are antiferromagnetic (-2 J =256, 230 and 324 cm-1, respectively) and characterized by X-ray diffraction analysis (2: Cr-Cr 2.763(1) A?; Fe-Fe 2.6184(9) and 2.706(1) A?; Cr-Se 2.447, 2.460 A?; 3: Cr-Cr 2.762 A?; Mn-Mn 2.920 A?; Cr-Se 2.447, 2.460 A?; 4: Cr-Cr 2.816 A?, Mn-Mn 2.835 A?, Cr-Se 2.464 A?). The photochemical reaction of 1 and Mn2 (CO)10 at higher temperature gives the paramagnetic complex Cp′Cr(μ-SPh)3Mn(CO)3 (5) with a weak Cr-Mn bond (3.0239 A?). The new heterochalcogenic complex [Cp′Cr(μ-SPh)]2(μ-Te) (6) which obtained at the interaction of [Cp′Cr(CO)(μ-SPh)]2 with Te and was studied by X-ray method (Cr-Cr 2.772 A?, Cr-S 2.359 A?, Cr-Te 2.601-2.607 A?, Cr-Te-Cr 64.3°), reacted with Co2(CO)8 with formation of the diamagnetic mixed-metal heterochalcogenic cluster [Cp′2Cr2(SPh)](μ3-S) (μ3-Te)Co(CO)2 (7) (Cr-Cr 2. 646 A?, Cr-Co 2.627 A?-2.623 A?, Cr-μ3-S 2.282-2.299 A?, Co-μ3-S 2.199 A?, Cr-μ3-Te 2.630-2.618 A?, Co-μ3-Te 2.466 A?, Cr-μ-SPh 2.335 A?). The role of super-exchange spin-spin interaction through the chalcogen bridge atom is discussed.
