HOME PAGE * KS3 SCIENCES * GCSE BIOLOGY CHEMISTRY PHYSICS * ADVANCED LEVEL CHEMISTRY

SPECTROSCOPY INDEXES  *  All Advanced Organic Chemistry Notes  *  [SEARCH BOX]

Advanced Organic Chemistry: Infrared spectrum of 3-methylhexane

Interpreting the infrared spectrum of 3-methylhexane

Doc Brown's Chemistry Advanced Level Pre-University Chemistry Revision Study Notes for UK IB KS5 A/AS GCE advanced A level organic chemistry students US K12 grade 11 grade 12 organic chemistry courses involving molecular spectroscopy analysing infrared spectra of 3-methylhexane

C7H16 infrared spectrum of 3-methylhexane wavenumbers cm-1 functional group detection fingerprint pattern identification of 3-methylhexane doc brown's advanced organic chemistry revision notes 

Spectra obtained from a liquid film of 3-methylhexane. The right-hand part of the of the infrared spectrum of 3-methylhexane, wavenumbers ~1500 to 400 cm-1 is considered the fingerprint region for the identification of 3-methylhexane and most organic compounds. It is due to a unique set of complex overlapping vibrations of the atoms of the molecule of 3-methylhexane.

 3-methylhexane   C7H16   alkanes structure and naming (c) doc b

 alkanes structure and naming (c) doc b alkanes structure and naming (c) doc b

Interpretation of the infrared spectrum of 3-methylhexane

The most prominent infrared absorption lines of 3-methylhexane

From 2975 to 2845 cm-1 there are multiple peaks amounting to strong absorption due to C-H stretching vibrations in the -CH-, -CH2- or -CH3 groups in 3-methylhexane.

The are other C-H absorptions due to C-H deformation vibrations of the CH2 groups at 1480 to 1440 cm-1.

These overlap with C-H vibrations of the CH3 groups at wavenumbers 1385 to 1370 cm-1 and 1470 to 1435 cm-1.

There are weak C-H vibrations of the -CH- group at ~1340 cm-1, close to the C-H vibrations of the -CH3 groups.

There are strong C-C skeletal vibration absorptions at 1175 to 1140 cm-1 from the C(CH3)2 grouping, and similarly, but, weaker, an absorption at 840 to 790 cm-1.

There are no specific characteristic lines for alkanes like 3-methylhexane because C-C and C-H vibrations are common to so many organic molecules and alkanes like 2-methylhexane have no functional group that gives a characteristic vibration.

The absence of other specific functional group bands will show that a particular functional group is absent from the 3-methylhexane molecular structure.

Key words & phrases: C7H16 image and diagram explaining the infrared spectrum of 3-methylhexane, complete infrared absorption spectrum of 3-methylhexane, comparative spectra of 3-methylhexane, prominent peaks/troughs for identifying functional groups in the infrared spectrum of 3-methylhexane, important wavenumber values in cm-1 for peaks/troughs in the infrared spectrum of 3-methylhexane, revision of infrared spectroscopy of 3-methylhexane, fingerprint region analysis of 3-methylhexane, how to identify 3-methylhexane from its infrared spectrum, identifying organic compounds like 3-methylhexane from their infrared spectrum, how to analyse the absorption bands in the infrared spectrum of 3-methylhexane detection of no functional groups in the 3-methylhexane molecule example of the infrared spectrum of a molecule like 3-methylhexane with a functional group  interpreting interpretation of the infrared spectrum of 3-methylhexane shows presence of no functional group  CH3CH2CH(CH3)CH2CH2CH3

Links associated with 3-methylhexane

The chemistry of ALKANES revision notes INDEX

Infrared spectroscopy index

ALL SPECTROSCOPY INDEXES

All Advanced Organic Chemistry Notes

Use My Google search site box

Email doc b: chem55555@hotmail.com

TOP OF PAGE

 Doc Brown's Chemistry 

*

TOP OF PAGE

latest video game release, latest pop music releases, download free music, latest film releases, latest high street fashion in clothes, fashionable trending in clothing, girls buy clothes, spend a lot of money on clothes, shoes, sweets and chocolates, magazines and make-up. Boys buy food and drink, computer games, DVDs and CDs, girls and boys spend a lot of money on credit for mobile phones, buses and trains to transport them going out. Girls spend a lot of money on clothes color colour preferences in clothes, cool sunglasses, boys  buy expensive things like designer sports clothes and trainers, teenagers save for holidays, clothes, mobile phones, birthday presents and electronic goods, teenage accessories, Favourite style of jeans. A typical girl’s shopping list includes mobile phone credit deals, fashionable quality cool airpods, air pods, fashionable clothes, the most popular favourite sneakers, fancy shoes, sweets, chocolates, magazines, lip moisturizer , lots on make-up, well being, teenage decor decorating their room, teenagers like LED string lantern lights, beauty products for teenagers, denim jackets, scrunchies coolness, fashionable back packs, typical boy’s shopping list includes mobile credit deals, eating out takeaway food and drinks, what teenagers like to buy in clothes, computer games, DVDs, CDs, what teenagers talk about, what teenagers worry about, what teenagers like to do for fun sports, what cool things do teenagers buy, resale websites like eBay Teenager education word cloud how do I apply to university to study biology?, what courses are available at university to study biology?, what grades do I need to get to university to study biology?, how do I apply to university to study chemistry?, what courses are available at university to study chemistry?, what grades do I need to get to university to study chemistry?, how do I apply to university to study physics?, what courses are available at university to study physics?, what grades do I need to get to university to study physics?, how do I apply to university to study biomedical sciences?, what courses are available at university to study biomedical sciences?, what grades do I need to get to university to study biomedical sciences, how do I apply to university to study medicine?, what courses are available at university to study medicine?, what grades do I need to get to university to study medicine?, how do I apply to university to study biochemistry?, what courses are available at university to study biochemistry?, what grades do I need to get to university to study biochemistry?, how do I apply to university to study mathematics?, what courses are available at university to study mathematics?, what grades do I need to get to university to study mathematics?, how do I apply to university to study chemical engineering?, what courses are available at university to study chemical engineering?, what grades do I need to get to university to study chemical engineering?, how do I apply to university to study civil engineering?, what courses are available at university to study civil engineering?, what grades do I need to get to university to study civil engineering?, how do I apply to university to study electrical engineering?, what courses are available at university to study electrical engineering?, what grades do I need to get to university to study electrical engineering?, how do I apply to university to study computer science?, what courses are available at university to study computer science?, what grades do I need to get to university to study computer science?,