New neutral and cationic dicyclopentadienylniobium complexes
| العنوان: | New neutral and cationic dicyclopentadienylniobium complexes |
|---|---|
| المؤلفون: | Pascual Royo, F.A. Urbanos, Miguel Mena, Antonio Antiñolo |
| المساهمون: | Universidad de Alcalá. Departamento de Química Inorgánica |
| المصدر: | e_Buah Biblioteca Digital Universidad de Alcalá instname |
| بيانات النشر: | Elsevier, 1984. |
| سنة النشر: | 1984 |
| مصطلحات موضوعية: | Ciencia, Ligand, Stereochemistry, Science, Organic Chemistry, Trimethylphosphine, Cationic polymerization, Halide, SCIENCE, Alkylation, Biochemistry, Medicinal chemistry, Química inorgánica, Dicyclopentadienylniobium complexes, Inorganic Chemistry, chemistry.chemical_compound, chemistry, CIENCIA, Halogen, Materials Chemistry, Physical and Theoretical Chemistry, Amalgam (chemistry), Metallocene, Chemistry, inorganic |
| الوصف: | (η5-C5H5)2NbX(PMe3) (X = Cl, Br) was prepared by reducing (η5-C5H5)2NbX2 with Na/Hg amalgam in the presence of PMe3. (η5C5H4Me)2TaCl(PMe3) was obtained analogously. The reaction of (η5-C5H5)2NbCl(PMe3) with AgBF4 gave metallic silver and cationic [η5-C5H5)2NbCl(PMe3)]+, which reacts with OPPh3 to give [(η5-C5H5)2Nb(OPPh3)(PMe3)]2+ Cationic halide complexes [(η5-C5H5)2NbClL]+ are also formed from (η5-C5H5)2NbCl2 by abstraction of chloride with AgBF4 in the presence of the ligand, L = CH3CN or OPPh3. When L is acrylonitrile, the dinuclear species {[(η5-C5H5)2NbCl]2(μ-CH2CHCN)}2+ is obtained. Attempts to isolate alkylniobium(III) complexes by alkylation of the corresponding halide complexes or by reduction of the haloalkylniobium(IV) derivatives were unsuccessful; no (η5-C5H5)2NbCl(CH2C6H5) was obtained and treatment of (η5-C5H5)2Nb(CH2C6H5)2 with halogen gave (η5-C5H5)2NbI2, (η5-C5H5)2NbBr3 and (η5-C5H5)2NbX2+X3− (X = Br, I). Comisión Asesora de Investigación Científica y Técnica |
| وصف الملف: | application/pdf |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90942fcb07bce018cd874b6cddc80be0Test http://hdl.handle.net/10017/4799Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....90942fcb07bce018cd874b6cddc80be0 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |