reduction of alcohol to alkane point

New Pathway for Long

Alkane biosynthesis in the bacterium Vibrio furnissii M1 involves the synthesis of long-chain alkanes via 1-alcohol Evidence for this novel pathway are the following (i) Both even- and odd-carbon-number n -alkanes were produced from glucose while only even-carbon-number fatty acids were produced in V furnissii M1 This result cannot be explained by the decarbonylation

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Alkyl Halides and Alcohols

There is a methyl group on the second C atom as well as a Cl atom so the formal name for this alcohol is 2-chloro-2-methylbutan-1-ol If naming the alcohol group as a substituent it would be 2-chloro-1-hydroxy-2-methylbutane Test Yourself Name this molecule as an alcohol and as a substituted alkane

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Chapter 11 Lecture Notes: Alcohols Ethers Aldehydes and

Chapter 11 Lecture Notes 1 Chapter 11 Lecture Notes: Alcohols Ethers Aldehydes and Ketones Educational Goals 1 Given the structure of an alcohol ether thiol sulfide aldehyde or ketone molecule be able to give the systemic names and vice versa

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dihaloalkane

06/11/2018alkane haloalkane alkene alcohol aldehyde ketone carboxylic acid dihaloalkane Br2 Cl2 room temp Electrophilic addition HBr HCl room temp Electrophilic addition If primary heat gently and distill partial oxidation If secondary heat under reflux oxidation Na2Cr2O7/H + heat under reflux + excess oxidising agent Oxidation poly(al kene) high pressure Catalyst

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Alkane

As a rule of thumb the boiling point rises 20 - 30 C for each carbon added to the chain this rule applies to other homologous series [6] A straight-chain alkane will have a boiling point higher than a branched-chain alkane due to the greater surface area in contact thus the greater van der Waals forces between adjacent molecules

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Alkane : definition of Alkane and synonyms of Alkane

As the boiling point of alkanes is primarily determined by weight it should not be a surprise that the boiling point has almost a linear relationship with the size (molecular weight) of the molecule As a rule of thumb the boiling point rises 20–30 C for each carbon added to the chain this rule applies to other homologous series

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Alkane

General Formula: CnH2n+2 n = 1 2 3 Functional Group: No Functional Group First 3 Members: Alkane are the simplest family of hydrocarbons – compounds containing carbon and hydrogen only They only contain carbon-hydrogen bonds and carbon-carbon single bonds Alkanes are saturated hydrocarbon Nomenclature of Alkanes Nomenclature = Naming

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Physical Chemical Properties and Use of Aldehydes

Physical Properties of Aldehydes and Ketones The intermolecular forces of attraction in aldehydes and ketones are dipole-dipole interactions These are stronger than van der Waals forces in alkanes but weaker than H- bonding in alcohols Therefore the boiling point order is: Alkanes Aldehyde / Ketones Alcohols Due to the polarity of the carhonyl []

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Enantiocomplementary preparation of (S)

A previously unreported alcohol dehydrogenase enzyme in the mutant soil bacterium Pseudomonas putida UV4 catalyses the reduction of 2- 3- and 4-acylpyridines to afford the corresponding (S)-1-pyridyl alkanols with moderate to high e e whilst under the same conditions 2 6-diacetylpyridine is readily converted to the corresponding enantiopure C 2-symmetric (S S)

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Organic Chemistry/Alcohols

At this point there is a magnesium bromide on the oxygen of what was a carbonyl The proton from the acidic solvent easily displaces this magnesium bromide ion and protonates the oxygen creating a primary alcohol with formaldehyde a secondary alcohol with an aldehyde and a tertiary alcohol with a ketone

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Alkenes: Preparations

Alkenes: Preparations Alkenes are generally prepared through β elimination reactions in which two atoms on adjacent carbon atoms are removed resulting in the formation of a double bond Preparations include the dehydration of alcohols the dehydrohalogenation of alkyl halides and the dehalogenation of alkanes

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Addition Reactions of Alkynes

Addition Reactions of Alkynes A carbon-carbon triple bond may be located at any unbranched site within a carbon chain or at the end of a chain in which case it is called terminal Because of its linear configuration ( the bond angle of a sp-hybridized carbon is 180 ) a ten-membered carbon ring is the smallest that can accommodate this function without excessive strain

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The Cytochrome P450 Enzyme CYP96A15 Is the Midchain

13/08/2007mah1-2 secondary alcohol and ketone levels were reduced to 71% and 25% of the wild-type loads respectively but these reductions were not as severe as those seen in mah1-1 At the same time the mah1-2 mutant also had alkane coverage increased above that of the wild type with amounts similar to mah1-1

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Alkane 11

From alkyl halides by reduction • Alkyl halides when treated with reducing agent like Zn – Cu couple and alcohol form corresponding alkane 3 4 Zn Cu alcohol methaneMethyl bromide CH Br 2H CH HBr- D + + 2 5 2 6 Zn Cu alcohol Ethyl bromide Ethane C H Br 2H C H HBr- D + + 33

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Alcohols: General Formula and Functional Group

Compared to the alkane they have much higher boiling points than the alkane of similar molecular weights This is because of their differences in the governing intermolecular forces of attraction (IMF) present for the two compounds For alkane the major IMF present is only the London Dispersion Forces

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Hydride Reduction Reactions: Experiment

Discussion The melting point measurement of the hydride reduction product was 45-53 0 C The literature value for the melting point of the mixed isomers is 62-70 0 C 7 The melting point is a rather broad range and occurs well below the literature value indicating the product is not entirely pure The product is a mixture of the cis and trans isomers as well as the starting

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Alkane Reactions (PPT file)

Alkane Reactions (PPT file) 1 2 13 Sources of Alkanes and Cycloalkanes 2 Crude oil 3 Refinery gas C 1 -C 4 Light gasoline (bp: 25-95 C) C 5 -C 12 Naphtha (bp 95-150 C) Kerosene (bp: 150-230 C) C 12 -C 15 Gas oil (bp: 230-340 C) C 15 -C 25 Residue Crude oil

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