212910-08-2Relevant articles and documents
Charge-Transfer Salts of Octamethylferrocenyl Thioethers and [M(mnt)2]- Complexes (M = Ni, Co, Pt). Synthesis, Structure, and Physical Properties
Zürcher, Stefan,Gramlich, Volker,Von Arx, Dieter,Togni, Antonio
, p. 4015 - 4021 (1998)
The new ferrocene derivatives Fe(η5-C5Me4SR)2 (R = Me, 4: R = t-Bu, 5) have been prepared from the corresponding cyclopentadiene and FeCl2. 5 may be converted to the bis(thiobenzoate) 6, a protected form of dithiol 8. From 6 the octamethyl trithiaferrocenophane 9 may be obtained in good yields. Compounds 4 and 5 are easily oxidized and form paramagnetic salts containing [M(mnt)2]- anions (M = Co, Ni, Pt). The derivatives [Fe(η5-C5Me4SMe)2][Ni(mnt) 2], 14, [Fe(η5-C5Me4SMe)2][Pt(mnt) 2], 15, [Fe(η5-C5Me4SMe)2][Co(mnt) 2], 16, [Fe- (η5-C5Me4St-Bu)2][Ni(mnt) 2], 17, [Fe(η5-C5Me4St-Bu) 2][Pt(mnt)2], 18, and [Fe(η5-C5Me4St-Bu) 2][Co(mnt)2], 19, have been prepared and fully characterized. X-ray crystal structural studies of 14 and 16-19 have been carried out. 14 and 16 display stacks of strongly interacting [M(mnt)2]- anions, whereas 19 contains discrete [Co(mnt)2] dimers. 17 and 18 are isomorphous and display a typical D+A-D+A- structural motif. SQUID susceptibility measurements indicate a weak ferromagnetic ordering at low temperature for these two compounds.
