8 Organic Chemistry 8.1 Organic Synthesis
P3101100
Haloalkanes: Wurtz reaction - lithium organyls
Reaction of lithium with ethyl iodide and the following Wurtz reaction of ethyl lithium with ethyl iodide.
Principle Unlike the other alkali-organyls, lithium organyls - with the exception of methyllithium - show a stronger covalent behaviour. They dissolve rather well in organic solvents, such as diethyl ether, tetrahydrofuran, and alkanes, and they are relatively stable in these solvents. Wurtz synthesis was developed in 1854 for the preparation of higher alkanes based on haloalkanes. Alkyl iodides react the easiest. The reaction can be controlled best with lithium, since the other alkali metals react much more violently. Wurtz synthesis is often a side reaction that occurs during organometallic conversions.
Molecular model constuction kit, polymer chemistry
Task Investigate the reaction of ethyl iodide with lithium and the following reaction of ethyllithium with ethyl iodide.
Function and Application With these big elements (Atoms) for molecular models structures of chemical compounds can be presented especially vividly also to a greater number of observers.
What you can learn about ▪ Alkali-organyls; Lithium organyls ▪ Wurtz synthesis; Organometallic compounds
Benefits
Main articles Gasometer 1000 ml Weather monitor, 6 lines LCD Condenser, Dimroth type GL25/12 Gasket for GL25, 8mm hole, 10 pcs. Retort stand, h = 750 mm Round bottom flask, 100 ml, GL25/12, GL18/8 Set of Precision Balance Sartorius CPA 623S and measure software, 230 V
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excellence in science 154
▪ Structural elements of shockproof plastic (robust). ▪ Diameter of the elements: 38 mm (ostentatious). ▪ Chemical elements characterised by internationally usual colours. ▪ Angularity of the connections by precisely rivetted push-buttons according to the valences of the elements. ▪ Transparent connectors: straight for single bonds and curved for double and triple bonds.