CHEM 203 Lecture Notes - Lecture 14: Dihydroxylation, Meso Compound, Orbiting Solar Observatory
Document Summary
Osmate esters and their reduction with aqueous nahso3 leading to the formation of vicinal diols (also described as 1,2-diols. Dihydroxylation (osmylation) reaction: the conversion of an alkene to a 1,2-diol by reaction with. Oso4 followed by reduction of the intermediate osmate ester, e. g. , with nahso3. Strictly syn course of the dihydroxylation (osmylation) reaction. Absence of rearrangements in the dihydroxylation reaction (no carbocation intermediates) Oh (meso compound: achiral) (chiral: formed as the racemate) (chiral: formed as the racemate) Ho h (meso compound: achiral: oso4, aq. Chemically and technologically important reactions of alkenes initiated by the interaction of the. System with molecules containing a strongly lewis acidic site: the case of borane, bh3. Strongly lewis acidic nature of borane, bh3 the molecule is trigonal: b is sp2. Probable initial interaction of the electrons of the alkene with the vacant p orbital of bh3. Hydroboration reaction: the addition of a b h bond across the system of an alkene.
