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Synthesis and Characterization of Supramolecular Colloids
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Methylene blue incorporation into alkanethiol SAMs on Au(111): effect of hydrocarbon chain ordering

Doris Grumelli1, Lucila P Méndez De Leo, Cecilia Bonazzola

  • 1Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, 1900 La Plata, Buenos Aires, Argentina. doris@inifta.unlp.edu.ar

Langmuir : the ACS Journal of Surfaces and Colloids
|April 2, 2010
PubMed

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.
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In nature, compounds containing both carbon and hydrogen are known as "hydrocarbons". Aliphatic hydrocarbons are compounds whose molecules contain saturated single bonds (i.e., alkanes) or unsaturated double or triple bonds. Alkenes contain carbon–carbon double bonds and have a structural formula CnH2n. Unsaturated hydrocarbons containing carbon–carbon triple bonds are called "alkynes" and are structurally represented by the formula CnH2n-2.
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