TY - JOUR
T1 - Synthesis of new organotitanium (IV) complexes Cp2Ti(SeR) 2 and Cp2TiCl(SeR) via tandem reactions involving 'Cp 2Ti' intermediate. Crystal structures of Cp2TiCl(SeR) (R=p-ClC6H4, p-BrC6H4)
AU - Song, Li Cheng
AU - Han, Cong
AU - Hu, Qing Mei
AU - Zhang, Zhi Pan
PY - 2004/6/10
Y1 - 2004/6/10
N2 - A simple and convenient route for synthesizing organotitanium (IV) complexes with a general formula Cp2Ti(SeR)2 or Cp 2TiCl(SeR) has been developed. This synthetic route includes reduction of Cp2TiCl2 with Mg and an in situ treatment of the intermediate 'Cp2Ti' with diselenides RSeSeR. Interestingly, while the route involving reaction of Cp2TiCl2, Mg and RSeSeR in a molar ratio of 1:1:1 produced Cp2Ti(SeR)2, (1-5, R=α-C10H7, o-MeC6H4, m-MeC6H4, p-ClC6H4, p-BrC 6H4) in 91-97% yields, the route involving reaction of Cp2TiCl2, Mg and RSeSeR in a molar ratio of 1: 0.5: 0.5 afforded Cp2TiCl(SeR) (6-7, R=p-ClC6H4, p-BrC6H4) in 70% and 92% yields, respectively. 1-7 are new and have been characterized by elemental analysis and spectroscopy, as well as by X-ray diffraction analysis for 6 and 7. A possible pathway for production of these two types of organotitanium (IV) complexes, mainly depending upon the molar ratio of the starting materials, are briefly discussed.
AB - A simple and convenient route for synthesizing organotitanium (IV) complexes with a general formula Cp2Ti(SeR)2 or Cp 2TiCl(SeR) has been developed. This synthetic route includes reduction of Cp2TiCl2 with Mg and an in situ treatment of the intermediate 'Cp2Ti' with diselenides RSeSeR. Interestingly, while the route involving reaction of Cp2TiCl2, Mg and RSeSeR in a molar ratio of 1:1:1 produced Cp2Ti(SeR)2, (1-5, R=α-C10H7, o-MeC6H4, m-MeC6H4, p-ClC6H4, p-BrC 6H4) in 91-97% yields, the route involving reaction of Cp2TiCl2, Mg and RSeSeR in a molar ratio of 1: 0.5: 0.5 afforded Cp2TiCl(SeR) (6-7, R=p-ClC6H4, p-BrC6H4) in 70% and 92% yields, respectively. 1-7 are new and have been characterized by elemental analysis and spectroscopy, as well as by X-ray diffraction analysis for 6 and 7. A possible pathway for production of these two types of organotitanium (IV) complexes, mainly depending upon the molar ratio of the starting materials, are briefly discussed.
KW - Chloride ligand
KW - CpTi-containing complexes
KW - Crystal structures
KW - Selenolate ligand
KW - Synthesis
UR - http://www.scopus.com/inward/record.url?scp=2542436745&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2003.06.011
DO - 10.1016/j.ica.2003.06.011
M3 - Article
AN - SCOPUS:2542436745
SN - 0020-1693
VL - 357
SP - 2199
EP - 2204
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 8
ER -