258823-76-6Relevant articles and documents
Investigations on novel tandem reaction of three components, [η5-RC5H4(CO)2Mo]2, Ph2Te2, and Cp2TiCl2, Cp2ZrCl2, or Cp2ZrBr2.
Song, Li-Cheng,Shi, Yao-Cheng,Zhu, Wen-Feng,Hu, Qing-Mei,Huang, Xiao-Ying,Du, Fei,Mao, Xi-An
, p. 156 - 162 (2008/10/08)
While reaction of triply bonded dimers [η5-RC5H4(CO)2Mo]2 (R = MeCO, MeO2C) with Ph2-Te2 in xylene at 110°C and subsequent treatment with Cp2TiCl2 at reflux gives novel tetrakis-bridged complexes (η5-RC5H4Mo)2(μ-PhTe) 4 (1, R = MeCO; 3, R = MeO2C) and (η5-RC5H4Mo) 2(μ-Cl)(μ-PhTe)3 (2a,b, R = MeCO; 4a,b, R = MeO2C), the dimers [μ5-RC5H4(CO)2Mo]2 (R = MeO2C, EtO2C) reacted with Ph2Te2 and Cp2ZrCl2 or Cp2ZrBr2 under similar conditions to afford novel tetrakis-bridged complexes (η5-RC5H4Mo)2(μ-PhTe) 4 (3, R = MeO2C; 5, R = EtO2C), (η5-RC5H4Mo) 2(μ-Cl)(μ-PhTe)3 (4a,b, R = MeO2C; 6a,b, R = EtO2C), and (η5-RC5H4-Mo) 2(μ-Br)(μ-PhTe)3 (7a,b, R = MeO2C; 8a,b, R = EtO2C). A possible pathway for production of such tetrakis-bridged complexes has been suggested primarily on the basis of the following facts: (i) Treatment of triply bonded dimers [η5-RC5H4(CO)2Mo]2 (R = MeO2C, EtO2C) with Ph2Te2 in xylene at 110°C produces bis-bridged complexes [η5-RC5H4(CO)2Mo] 2(μ-PhTe)2 (9, R = MeO2C; 10, R = EtO2C) and (ii) reaction of 9 with Cp2MCl2 (M = Ti, Zr) yields tetrakis-bridged complexes 3 and 4a,b. All the new products 1-10 are fully characterized by elemental analysis and IR, 1H, and 125Te NMR spectroscopies, and 4b and 9 by single-crystal X-ray diffraction techniques.
