Synthesis, Characterization, and Reaction Chemistry of Metal Pentadienyl Compounds

犹他大学的理查德·恩斯特教授将在化学部IBO项目的资助下，进行金属-戊二烯化合物的化学研究。钛将是主要的金属中心，其他早期过渡的金属中心，如铬和锆将扮演次要角色。配位的戊二烯配体与不饱和有机分子的偶联反应可以形成有机环，这将是ERNST广泛探索的方向。还将研究含有两个共轭戊二烯片段(开放富瓦烯)的配体结合两个金属中心的能力；这类双核化合物的顺磁性衍生物将引起人们的兴趣，因为这种共轭应该促进两个金属中心之间的强烈通信。钛和其他金属的原子将连接到含有两个双键的五元碳链的有机分子上。通过这种方式修饰有机分子，它们可以与其他含有一个双键的有机分子反应，形成有机环。这种成环反应将被详细研究，因为它们可能是合成复杂有机产品的途径。

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.