
	Where results make sense

Topic: Halogenoalkanes

Related Topics

Alkane

Alkene

Halocarbon

Fluoroalkane

Iodoalkane

Alcohol

Diene

Hydrocarbon

Benzene

Biofuel

Salt

William Carleton

Organic chemistry

Chlorine

Organic compound

	Types of halogenoalkanes (Site not responding. Last check: 2007-11-04)
		In a primary (1°) halogenoalkane, the carbon which carries the halogen atom is only attached to one other alkyl group.
		In a secondary (2°) halogenoalkane, the carbon with the halogen attached is joined directly to two other alkyl groups, which may be the same or different.
		In a tertiary (3°) halogenoalkane, the carbon atom holding the halogen is attached directly to three alkyl groups, which may be any combination of same or different.
	www.chemguide.co.uk /mechanisms/nucsub/types.html (193 words)

	[No title]
		Halogenoalkanes can be hydrolysed by reacting them with aqueous potassium hydroxide solution or another aqueous base.
		If a halogenoalkane is heated under reflux with a solution of potassium cyanide in ethanol, a substitution reaction forming a nitrile takes place.
		A molecule of the hydrogen halide is eliminated from the halogenoalkane, leaving the corresponding alkene.
	members.lycos.co.uk /SMC_Chem/AS2.2biii.htm (383 words)

	HALOGENOALKANES Haloalkanes (1) at Doc Brown's Chemistry Clinic. wpbchemhelp
		The halogenoalkane structures are based on replacing one or more hydrogen atoms in the alkane structure with a halogen atom X (X = F, Cl, Br or I).
		The positions of the substituent(s), denoted with a prefix eg halo… or alkyl… groups, are denoted by using the lowest possible numbers for the associated carbon atoms in the main chain.
		Halogenoalkanes are classified according to the atoms/groups attached to the carbon of the halogen atom X.
	www.wpbschoolhouse.btinternet.co.uk /page06/halogenoalkanes1.htm (466 words)

	Halogenoalkanes
		describe the mechanism of nucleophilic substitution in the hydrolysis of primary halogenoalkanes.
		As explained above, the rates of hydrolysis of primary halogenoalkanes with hot aqueous sodium hydroxide depends on the enthalpies of the carbon—halogen bonds.
		Halogenoalkanes are useful synthetic intermediates in the manufacture of pharmaceutical compounds (e.g.
	home.freeuk.net /braybrook/6-1/Chains_and_rings/Halogenoalkanes.htm (1314 words)

	Nucleophilic Substitution (Site not responding. Last check: 2007-11-04)
		Halogenoalkanes are classified as primary, secondary or tertiary...
		With primary and secondary halogenoalkanes, the reaction is very slow at ordinary temperatures, but rapid with tertiary halogenoalkanes.
		The tertiary halogenoalkane first ionises in the slow step, followed by the rapid addition of the nucleophile to the intermediate carbocation.
	www.avogadro.co.uk /organic/nucleo-sub.htm (268 words)

	uses of halogenoalkanes
		This page looks at some of the uses of halogenoalkanes (haloalkanes or alkyl halides) as required by UK A level syllabuses.
		These are still mainly halogenoalkanes, although simple alkanes such as butane can be used for some applications (for example, as aerosol propellants).
		Halogenoalkanes are therefore useful in the lab as intermediates in making other organic chemicals.
	www.chemguide.co.uk /organicprops/haloalkanes/uses.html (559 words)

	Nuffield Advanced Chemistry - Which halogenoalkanes react fastest under hydrolysis C-Cl, C-Br or C-I ?
		The instructions for this experiment finish by asking you to try to relate the reactivity of the halogenoalkanes to their dipole moments and to the strength of the relevant carbon-halogen bonds.
		The general theory associated with nucleophilic substitution reactions of the halogenoalkanes is given on the opposite page (page 231), and you should read this carefully first before trying to answer the question associated with the experiment.
		Since the iodoalkane is the most reactive towards nucleophilic attack it appears that the relative weakness of the carbon-iodine bond is a more significant factor than the polarity of the C-I bond.
	www.chemistry-react.org /go/Faq/Faq_3616.html (265 words)

	Halogenoalkanes (haloalkanes) Menu (Site not responding. Last check: 2007-11-04)
		An introduction to the halogenoalkanes, their reactivity and their physical properties.
		Includes testing for halogenoalkanes, and the use of silver nitrate solution as a guide to the reactivity of the various halogenoalkanes.
		An introduction to Grignard reagents, including making them from halogenoalkanes and some of their simple reactions.
	www.chemguide.co.uk /organicprops/haloalkanemenu.html (114 words)

	elecuter Scinet: Chemistry Revision (via CobWeb/3.1 planetlab1.netlab.uky.edu) (Site not responding. Last check: 2007-11-04)
		Two halogenoalkanes can be derived from propane which can be distinguished by numbering the carbon atom to which the halogen is attached, for example:
		Halogenoalkanes are polarised due to the electronegativity of the halogen.
		Halogenoalkanes react slowly with water to form alcohols.
	www.elecuter.co.uk.cob-web.org:8888 /Scinet/chemistry/a/ha.php (545 words)

	CYN The Atmosphere 2
		The characteristic properties of halogenoalkanes, comparing fluoro-, chloro-, bromo- and iodo-compounds; boiling points, formation of radicals by interaction with ultraviolet radiation (Storyline A3), and nucleophilic substitution with water, hydroxide ions and ammonia.
		The use of relative electronegativity values to predict bond polarity in a covalent bond; the relationship between reactivity of halogenoalkanes and bond enthalpy and bond polarity,
		The chemical basis of the depletion of ozone in the stratosphere due to halogenoalkanes, involving the formation of halogen atoms and the catalytic role of these atoms in ozone destruction (Storyline A3).
	www.york.ac.uk /org/seg/salters/chemistry/checknotes/CheckN6.html (271 words)

	AS Assessed Practical Plan — Rates of hydrolysis of halogenoalkanes investigation
		This is a detailed plan for an investigation into how the rate of hydrolysis of the halogenoalkanes changes with respect to the halogen present.
		Other factors that affect the rate of reaction are temperature, concentration of reagents, pressure, surface area and the use of a catalyst, however I will make sure that these remain constant, in order to ensure that only the chosen variable (the halogenoalkanes) is causing any difference to the rate of hydrolysis.
		Furthermore I predict that this precipitate will be either silver chloride, silver bromide or silver iodide depending on the halogenoalkane used and that as these precipitates will be formed at different rates, meaning the ‘crosses’ will disappear at different times.
	www.coursework.biz /Essays/A-Level/Chemistry/87 (495 words)

	Option A SL
		A.4.1 Distinguish between primary, secondary and tertiary halogenoalkanes.
		The predominant mechanism for tertiary halogenoalkanes is Sn1 and for primary halogenoalkanes it is Sn2.
		A.4.4 Describe how the rate of nucleophilic substitution in halogenoalkanes depends on both the identity of the halogen and whether the halogenoalkane is primary, secondary tertiary.
	www.phuhs.org /academics/Science/Dull/Senior/option_a_sl.htm (536 words)

	HALOGENOALKANES Haloalkanes Structure and Naming (3) at Doc Brown's Chemistry Clinic. wpbchemhelp
		HALOGENOALKANES Haloalkanes Structure and Naming (3) at Doc Brown's Chemistry Clinic.
		Some 'old' and commercial names are quoted in () though their use should be avoided if possible.
		followed by (3b) open chain halogenoalkanes with 5 or more carbon atoms
	www.wpbschoolhouse.btinternet.co.uk /page06/halogenoalkanes3.htm (65 words)

	Nucleophilic Reactions - Eduseek (Site not responding. Last check: 2007-11-04)
		Types of Halogenoalkanes - Describes what is meant by primary, secondary and tertiary halogenoalkanes
		Substitution Reactions Involving Cyanide Ions - The mechanisms for the formation of nitriles from halogenoalkanes by reaction with cyanide ions
		Substitution Reactions Involving Ammonia - The mechanisms for the formation of various sorts of amines from halogenoalkanes by reaction with ammonia
	www.eduseek.com /static/navigate2860.html (170 words)

	[No title] (Site not responding. Last check: 2007-11-04)
		(hydrolysis of 3° halogenoalkane undergoes a diff nuclephilic subs mechanism: carbocation intermediate)
		reagents: aqueous ethanolic potassium cyanide, KCN (KCN dissolved in mixed solvent of ethanol + water, ethanol: solvent for halogenoalkane, water: solvent for KCN)
		(excess halogenoalkane: mixture of 1°, 2°, 3°, quarternary alkylammonium salt)
	members.lycos.co.uk /thew33d/notes/nsachem9.html (577 words)

	Option A :
		The predominant mechanism for tertiary halogenoalkanes is S
		A.4.4 Describe how the rate of nucleophilic substitution in halogenoalkanes depends on both the identity of the halogen and
		whether the halogenoalkane is primary, secondary or tertiary.
	ibchem.com /IB/ibfiles/options/opt_A/opa.htm (649 words)

	Haloalkane (Site not responding. Last check: 2007-11-04)
		The haloalkane (also known as halogenoalkanes) are a group of chemical compounds, consisting of alkanes, such as methane or ethane, with one or more halogens linked, such as chlorine or fluorine, making them a type of organic halide.
		The most widely known family within this group are the chlorofluorocarbons (CFCs).
		A haloalkane, also known as alkyl halogenide, halogenalkane or halogenoalkane, and alkyl halide is a chemical compound derived from an alkane by substituting one or more hydrogen atoms with halogen atoms.
	www.tocatch.info /en/Alkyl_iodide.htm (3723 words)

	OPTION H (Site not responding. Last check: 2007-11-04)
		Halogenoalkanes can undergo substitution reactions or elimination reactions with hydroxide ions.
		Give the condition that favour each type of reaction.
		The rate of substitution of halogenoalkanes depends on a number of factors.
	www.uwcsea.edu.sg /chem/IBfolder/IBH/ORGANIC/OptionH/OptHreviewQ.html (397 words)

	adriandingleschemistrypages.com - Organic Chemistry Course Syllabus Objectives and Test Study Guide
		In order to be fully prepared you should seek help if required, refer to the relevant chapter in the textbook and review ALL relevant notes, homeworks, worksheets, classwork and other materials
		be able to recall the reagents and conditions for the elimination of hydrogen halides from halogenoalkanes
		be able to recall the reagents and conditions for the hydrolysis of halogenoalkanes
	www.adriandingleschemistrypages.com /oguide.html (1033 words)

	CTT
		halogenoalkanes – depletion of the ozone layer #
		halogenoalkanes – substitution reactions – why not S
		halogenoalkanes – polarity of carbon - halogen bond
	www.chemistry.rogerfrost.com /links/target.html (546 words)

	Multiple Choice Questions
		Which one of the following is a tertiary halogenoalkane?
		The carbon-bromine bond in bromoethane is polar because...
		The important use of the reaction between potassium cyanide and halogenoalkanes is that...
	www.knockhardy.org.uk /assets/MCRX.HTM (411 words)

	Nuffield Advanced Chemistry - Halogenoalkanes
		Is alcohol heated under reflux when preparing haloalkanes because the Nuffield Chemistry book doesn't do this but other books do.
		I read a use of halogenoalkanes is in fire extinguishers yet we did an expt that said they are flammable.
		I am baffled, because there seems to be some contradiction.
	www.chemistry-react.org /go/default/Topic/AsChemistry/Topic_46.html (170 words)

	IB Chemistry higher level: Organic - Nucleophilic substitution reactions
		IB Chemistry higher level: Organic - Nucleophilic substitution reactions
		20.3.1: Distinguish between primary, secondary and tertiary halogenoalkanes.
		20.3.4: Describe how the rate of nucleophilic substitution in halogenoalkanes depends on both the identity of the halogen and whether the halogenoalkane is primary, secondary or tertiary.
	ibchem.com /IB/ibnotes/full/org_htm/20.3.htm (105 words)

	Elimination Reactions Involving Halogenoalkanes - Eduseek
		Subjects > Science > Science - 16+ > Chemistry - Materials and their Properties > Organic Chemistry > Reactions in Organic Chemistry > Elimination Reactions > Elimination Reactions Involving Halogenoalkanes
		Elimination from Unsymmetrical Halogenoalkanes - Explains how to cope with cases where more than one elimination product can be formed from a single halogenoalkane
		Elimination V. Substitution - How the reaction between a halogenoalkane and hydroxide ions can lead to either elimination or substitution reactions
	www.eduseek.com /static/navigate2863.html (119 words)

	CTT
		amines - making amines - ammonia and halogenoalkanes
		DNA – translation of mRNA to make protein
		halogenoalkanes – substitution reactions – why not SN2?
	www.ilearnchemistry.com /target.html (432 words)

Try your search on: Qwika (all wikis)