| Summary: | 碩士 === 東海大學 === 化學系 === 89 === Trans-[Os(en)2(h2-H2)L]2+ metal canter has replaced Os(NH3)52+ for the investigation of Os(II) ammine complexes due to the strong reducing power of Os(NH3)52+ moiety which limits the study of Os(NH3)5L2+ complexes to the organic solvents. Trans-[Os(en)2(h2-H2)L]2+ complexes were stabilized by the Os(II) to H2 backbonding to such an extent that we were able to investigate the Os(II) complexes in the aqueous solution. Trans-[Os(en)2(h2-H2)L]2+ complexes were characterized by a unique signal of the 1H-NMR spectra in the 0~-14 ppm region, and its chemical shift was sensitive to the ligand used.
In this work we studied the spectroscopic (electronic and 1H-NMR) properties and the kinetics of formation of both AMP and GMP complexes of trans-[Os(en)2(h2-H2)L]2+. In order to understand the preferred coordination site of the metal center, properties of complexes with L= imH, py, Cl-, H2PO4-, HPO42- were also investigated.
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