Purchase of Instrumentation for the Service Small-Molecule X-Ray Crystallography Laboratory

化学研究仪器和设施计划的这一奖项将协助科罗拉多大学-博尔德分校化学系购买现代单晶衍射系统。 这一新的仪器将极大地促进以下领域的研究：（1）含醌和自由基半醌配体的过渡金属配合物，（2）金属硫化物在碳-杂原子和金属硫键断裂中的作用，（3）分子内刘易斯酸作为立体化学控制元素，（4）金属硫化物在碳-杂原子和金属硫键断裂中的作用。（4）2，5-二羧基稳定的1，4-二氢吡嗪作为有机导体和磁体合成中的电子供体;（5）扩展的热稳定的环状和线性磷腈;和（6）分子棒和连接器的单晶X射线结构。 X射线衍射仪用于对分子的全三维结构进行准确和精确的测量。 所获得的信息给出了给定分子的所有键距和键角的精确值，并且它给出了关于该分子相对于相邻分子的空间排列的准确信息。

This award from the Chemistry Research Instrumentation and Facilities Program will assist the Department of Chemistry at the University of Colorado--Boulder in the purchase of a modern single-crystal diffraction system. This new instrumentation will enhance greatly research in a number of areas, including the following: (1) transition metal complexes containing quinone and radical semiquinone ligands; (2) role of metal sulfides in carbon-heteroatom and metal sulfur bond cleavage; (3) intramolecular Lewis acids as stereochemical control elements; (4) 2,5-Dicarboxy-Stabilized 1,4-Dihydropyrazines as electron donors in the synthesis of organic conductors and magnets; (5) extended skeletally stabilized cyclic and linear phosphazanes; and (6) single crystal x-ray structures of molecular rods and connectors. The x-ray diffractometer is used to make accurate and precise measurements of the full three- dimensional structure of a molecule. The information obtained gives the precise values of all the bond distances and bond angles of a given molecule and it gives accurate information about the spatial arrangement of that molecule relative to the neighboring molecules.