Synthesis, Characterization, and Reaction Chemistry of Metal Pentadienyl Compounds

犹他大学的Richard Ernst教授将在化学部IBO项目的资助下进行金属-戊二烯基化合物的化学研究。钛将是主要金属中心，其他早期过渡金属中心，如铬和锆起次要作用。配位的戊二烯基配体与不饱和有机分子的偶联反应可以形成有机环，恩斯特将对此进行广泛的探索。还将研究含有两个共轭戊二烯基片段的配体（开放富勒烯）结合两个金属中心的能力；这类双核化合物的顺磁衍生物将引起人们的兴趣，因为这种共轭作用应促进两个金属中心之间的强通信。钛和其他金属的原子会与含有两根双键的五元碳链的有机分子相连。通过以这种方式修饰有机分子，它们可以与含有一个双键的其他有机分子反应形成有机环。由于这种环形成反应有可能成为合成复杂有机产物的途径，因此将对其进行详细的研究。

professor Richard Ernst of the University of Utah will conduct research on the chemistry of metal-pentadienyl compounds with funding from the IBO program of the Chemsitry Division. Titanium will be the primary metal center, with other early-transition metal centers such as chromium and zirconium playing a secondary role. Coupling reactions of the coordinated pentadienyl ligands with unsaturated organic molecules can form organic rings, and they will be explored extensively by Ernst. Ligands containing two conjugated pentadienyl fragments (open fulvalenes) will also be studied for their ability to bind two metal centers; paramagnetic derivatives of such dinuclear compounds will be of interest because the conjugation should foster strong communication between the two metal centers. %%% Atoms of titanium and other metals will be attached to organic molecules containing five-membered carbon chains with two double bonds. By modifying the organic molecules in this way they can react with other organic molecules containing one double bond to form organic rings. Such ring-forming reactions will be investigated in some detail because of their potential as routes to complex organic products.