Spectroscopic solvents

F. Power, T. Kozik, M. Interaction of Carbon Dioxide with Transition-Metal-Substituted Heteropolyanions in Nonpolar Solvents. Spectroscopic Evidence for Complex Formation, Inorg. Chem. 1998, 37, 4344. 

Because polypeptides are, in many cases, soluble in organic or aqueous solvents, spectroscopic techniques, including transient absorbance and flu-... 

Since 2000 several publications dealing with epoxidations and dihydroxylations of olefins have been published. The oxidation of alkenes and allylic alcohols using the urea-H202 adduct (UHP) as oxidant and methyltrioxorhenium (MTO) dissolved in [EMIM][Bp4] as catalyst was described by Abu-Omar et al. [149]. Both MTO and UHP dissolve completely in the ionic liquid. Conversions were found to depend on the reactivity of the olefin and the solubility of the olefinic substrate in the reactive layer. In general, the reaction rates of the epoxidation reaction were found to be comparable to those obtained in classical solvents. Spectroscopic investigations showed that both monoperoxo- and diperoxorhenium species were present in the solution and active in the oxidation chemistry (Scheme 5.3-14, see Section 5.3.1.3 for analytic details). 

Another fascinating demonstration of TRIR and time-resolved optical spectroscopy was the determination that photoexcitation of MnfCOlsfCOCHs) forms an intermediate with structure G in weakly coordinating solvents but with structure S in more strongly donating solvents. " Spectroscopic assignments were confirmed by comparing the TRIR spectra to those obtained at low temperature in similar solvents. 

Due to their solubility in various organic solvents, spectroscopic studies on the conformation of enzymes are simplified [468]. 

Formula Compound Melting point ("C) [a]D (solvent) Spectroscopic data Reference... 

CO)3Cl] (32a-l) by refluxing a stoichiometric mixture of the corresponding pyridyltriazole ligand and [Re(CO)5Cl] in an alcoholic solvent. Spectroscopic methods indicate that the expected/ac isomers are generated exclusively, and this has been confirmed by X-ray crystallography (Fig. 8c). The electronic spectra of... 

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