Exchange Coupling in Transition Metal Polyhydrides

在无机，生物无机和 有机化学课程，博士。迈克尔·海尼基 华盛顿大学将继续调查 一个新的量子力学过程， 在高温下质子的隧穿 过渡金属多氢化物配合物。 这一过程导致 质子-质子耦合常数异常大， 这些配合物的核磁共振（NMR）谱。 这一新现象的范围将由 合成具有不同 过渡金属和各种配体， 氢气 隧道过程的详细机制 将使用非弹性中子散射进行研究， 通过中子衍射和NMR进行结构测定 光谱学，特别强调氚核磁共振 谱 %%% 某些有机金属化合物中的氢原子对 交换位置而不破坏金属-氢键。 有机植物是一种重要的 工业催化剂，预计该项目将有助于 更好地理解催化剂的作用机制 行动上

With the support of the Inorganic, Bioinorganic and Organometallic Chemistry Program, Dr. D. Michael Heinekey of the University of Washington will continue his investigations of a new quantum mechanical process involving pairwise tunnelling of protons at high temperatures in certain transition metal polyhydride complexes. This proceess leads to exceptionally large proton-proton coupling constants in the nuclear magnetic resonance (NMR) spectra of these complexes. The scope of this novel phenomenon will be defined by the synthesis of additional polyhydride complexes with different transition metals and a variety of ligands in addition to hydrogen. The detailed mechanism of the tunnelling process will be investigated using inelastic neutron scattering, structure determination by neutron diffraction, and NMR spectroscopy, with particular emphasis on tritium NMR spectroscopy. %%% Pairs of hydrogen atoms in certain organometallic hydrides exchange positions without breaking the metal-hydrogen bonds. Organometallic hydrides constitute an important class of industrial catalysts, and this project is expected to help provide a better understanding of the mechanism of catalytic action.