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Chemistry

Alkenes

Cis-Dihydroxylation of alkenes: reaction with osmium tetroxide The reaction of the alkene with osmium tetroxide proceeds in a similar way to the reaction with potassium permanganate, but gives higher yields. Originally, osmium tetroxide was used in stoichiometric amounts and isolated cyclic esters of perosmic acid were obtained, which were then hydrosulfite hydrosulfite, which were then hydrosulfite.
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Chemistry

Step reactions

Kinetics of the Step Reactions III How does the degree of polymerization increase with the reaction time? Self-catalysis The following applies to the reaction rate: 1 (1 − p) 2 = 2kc02t + 1. Because P¯n = 1 / (1 − p) thus applies: P¯n2 = 2kc02t + 1P ¯n = const · t + 1P¯n grows linearly with t, ie less than proportionally with the reaction time. This means that a large number of polymer growth stages are required for high molecular weights.
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Chemistry

3D reaction animations: overview

Chemistry General ChemieAnorganische Chemistry Organic Chemistry Physical Chemistry Analytical Chemistry Technical Chemistry Macromolecular Chemistry Theoretical Chemistry Chemical Information chemo computer science Toxicology Organic Chemistry Basic Chemical BindungAlkaneAlkeneAlkineKohlenwasserstoffeStereochemieOxidationsreaktionenReduktionsreaktionenAlkoholeEtherSulfideHalogenalkaneCarbonsäurenCarbonyl connection Organometallic VerbindungenKeto-EnolAromatenchemieHeterocyclenSubstitutionAdditionsreaktionenEliminierungRadikalchemieReaktionsmechanismenPericyclische ReaktionenSubstanzenReaktionsmechanismen3D reaction animations: Overview 2 + 2 supra-antara-Cycloaddition3D-ReaktionsanimationMouse3D animation of the 2 + 2 supra-antara cycloaddition Table of contentsAddition of halogens to multiple bondsE1 eliminationE2 eliminationOzonolysis of alkenesDiels-Alder reaction in endo arrangementDiels-Alder reaction in exo arrangement 4 + 2 supra-supra cycloaddition (Diels-Alder react ion) 4 + 2 supra-antara cycloaddition 2 + 2 supra-antara cycloadditionElectrocyclic disrotatory ring closureElectrocyclic conrotatory ring closureCope rearrangement with armchair transition stateCope rearrangement with twist transition state 1,5 -sigmatropic suprafacial hydrogen-antrial hydrogen rearrangement 1,7 -Rearrangement 1,5 -sigmatropic rearrangement with retention 1,7 -sigmatropic rearrangement with inversionEpoxidation with peracidsTschugaeff-Elimination20 min.
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Chemistry

Ideal gases

Partial pressure If you consider a mixture of gases that do not react with one another and behave ideally, the proportions of the individual components become effective due to their partial pressures. The partial pressure of a component corresponds to the pressure that this component would exert if it were alone in the volume under consideration.
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Chemistry

Solution

From the calculation of u one can read off the possible measures that result in an increase in the velocity u: u = m1⋅v1 + m2⋅v2m1 + m2a) If mass 2 is at rest in front of the collision, the total velocity u is after the impact: u = m1⋅v1m1 + m2 We see that the velocity u increases when the impacting mass 1 is increased or when the impacted mass 2 is reduced.
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Chemistry

Electrical properties of polystyrene

Have you worked on the electrical properties of polystyrene learning unit and are looking for further material? Then we recommend the following learning units: Applications of standard PS, PS-I and SBS 40 min.ChemistryMacromolecular chemistryApplicationsThe applications of standard polystyrene and styrene-butadiene copolymers in packaging, electrical engineering, refrigeration technology, medicine, laboratory, sanitary technology and toys are presented.
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