Steric and Electronic Interaction in Face-to-Face Metallocenes

这个奖项是在无机、生物无机和有机金属化学项目中颁发的，以支持布兰代斯大学Myron Rosenblum博士的研究。研究的目的是设计，合成和性能表征一类新的空间约束金属茂物持有面对面的取向。这种材料有望具有有趣的导电性和可能的非线性光学特性。由三个相同的（同核）或不同的（异核）茂金属单元组成的三元分子将被制备。还将进行由这种面对面的茂金属链组成的同核聚合物的合成，以及在聚合物链中有两种不同金属交替的聚合物的合成。计划合成含两个、三个或四个环戊二烯金属中心的环戊二烯金属团簇在聚合物内形成重复单元的支链聚合物。由2,2′-双（茂金属基）-1,1-二萘基衍生的类似茂金属体系将被制备和研究。这些物质能够通过面对面构象或通过联苯基环表现出电子相互作用，并且原则上可以以光学活性形式制备。合作已经到位，以表征聚合物的电和磁特性。

This award is made in the Inorganic, Bioinorganic and Organometallic Chemistry Prorgam in support of the research of Dr. Myron Rosenblum of Brandeis University. The objective of the research is the design, synthesis and property characterization of a new class of sterically constrained metallocenes held in a face-to-face orientation. Such materials are expected to have interesting electrical conductivity and possibly nonlinear optical properties. Triad molecules consisting of three such metallocene units either all identical (homonuclear) or different(heteronuclear) will be prepared. The synthesis of homonuclear polymers composed of chains of such face-to-face metallocenes will also be carried out as well as those in which two different metals alternate in the polymer chain. Synthesis of branched-chain polymers in which cyclopentadienylmetal clusters containing two, three or four cyclopentadienylmetal centers form repeating units within the polymer are planned. Analogous metallocene systems derived from 2,2'-bis(metallocenyl)-1,1-binaphthyls will be made and studied. These substances are capable of exhibiting electronic interactions either through the face-to-face conformation or through the binaphthyl rings, and are, in principle, preparable in optically active form. Collaborations are in place to characterize the electrical and magnetic properties of the polymers.