442202-48-4Relevant academic research and scientific papers
Reactions of butterfly complex anions of the type [(μ-RTe)(μ-CO)Fe2(CO)6]- with electrophiles. A new route to μ4-Se-containing double-butterfly clusters. Crystal structures of (μ-p-MeC6H4Te)(μ-PhCH2SC=S)Fe2 (CO)6
Song, Li-Cheng,Hu, Qing-Mei,Fan, Hong-Tao,Tang, Ming-Yi,Yang, Zhi-Yong,Lu, Guo-Liang
, p. 2468 - 2472 (2002)
The nucleophilic reaction of anions [(μ-RTe)(μ-CO)Fe2(CO)6]- (3) with CS2 and subsequent treatment with organic halides R′X gave a series of R′S-containing single-butterfly complexes (μ-RTe)(μ-R′SC=S)Fe2(CO)6 (4a-d, R = Ph,p-MeC6H4; R′ = Me, PhCH2), whereas 3 reacted with R′NCS followed by treatment with CF3CO2H or Mel to afford the R′HN- and R′MeN-containing single-butterfly complexes (μ-RTe)(μ-R′HNC=S)Fe2(CO)6 and (μ-RTe)(μ-R′MeNC= S)Fe2(CO)6 (5a-d, R = Ph, p-MeC6H4; R′ = Ph, PhCH2). Interestingly, a series of double-butterfly μ4-Se-containing complexes [(μ-RTe)Fe2(CO)6]2 (μ4-Se) (6a-e, R = Et, Ph,p-MeC6H4, o-MeC6H4, p-BrC6H4) could be produced via a simple and new synthetic route involving a doubly nucleophilic reaction of anions 3 with an electrophile SeCl2. New complexes 4a-d, 5a-d, and 6a-e derived from anions 3 have been fully characterized by elemental analysis and IR, 1H NMR, 125Te NMR, and 77Se NMR (for 6a-e) spectroscopies. The 125Te NMR spectra of the new complexes displayed only one singlet, indicating that they consist of only one isomer, either a(R) or e(R). This has been confirmed by crystal X-ray diffraction analyses of 4d (R = p-MeC6H4; R′ = PhCH2), 6b (R = Ph), and 6e (R = p-BrC6H4), in which the R groups are attached to bridged Te atoms by an equatorial type of bond.
