CHM136H1 Lecture 3: Alkanes & Their Stereochemistry (Lectures 7-9)

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indigoshark23

28 Jan 2019

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CHM136H1 Full Course Notes

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Chm 236 : alkanes & their stereochemistry alkanes : saturated hydrocarbons stereochemistry : the. 3d arrangement of atoms in a molecule of interest. Functionalgro functions : a group of atoms having characteristic behaviour in all molecules it occurs reacts predictably. Iusually independent of the rest of the molecule) Cn hzn - 2 alkyne: triple bond ; General formula : th - cen functional group nitrile. Functional group : carbonyl ht another oxygen singly bonded to it functional group : sulfide chlorine : acid. R - o - r " functional group : ahh oxy. 13 " functional group : alkyl t nitrogen atom. Throat @ atom finstead of 0 atom) sulfur. C - c single bonds and c - h bonds only. I hydrogen atoms alkanes with more than 3 carbon atoms have isomers prefixes. : any compounds differing in (cid:8869) must have the same molecular formula same formula different bonds how their atoms are connected to each other.

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jaderat676

Classify each of the following statements as true or false:

a) To be classified as organic, a compound must be or have been part of a living organism.

b) Carbon atoms normally form four bonds in organic compounds.

c) Only an unsaturated hydrocarbon can engage in an addition reaction.

d) Members of a homologous series differ by a distinct structural unit.

e) Alkanes, alkenes, and alkynes are unsaturated hydrocarbons.

f) Alkyl groups are a class of organic compounds.

g) Isomers have the same molecular formulas but different structural formulas.

h) Cis-trans isomerism appear among alkenes but not alkynes.

i) All aliphatic hydrocarbons are unsaturated.

j) Aromatic hydrocarbons have a ring structure.

k) An alcohol has an alkyl group bonded to an oxygen atom, and an ether has two.

l) Carbonyl groups are found in alcohols and aldehydes.

m) An ester is an aromatic carbon made from the reaction of an alcohol and a carboxylic acid.

n) An amine has one, two, or three alkyl groups substituted for hydrogens in an ammonia molecule.

o) An amide has the structure of a carboxylic acid except that replaces OH in the carboxyl group.

p) A peptide linkage series arises when a water molecule forms from a hydrogen from the of one amino acid molecule an from an another amino acid molecule.

r) Chain-growth polymers are made a reaction that gives off water a second product.

s) Nylon is an example of a step-growth condensation polymer.

sangriacicada137

First, I don't understand the major difference between a conformation and an isomer. Below are the definitions that I found. They both sound the same, all I can see is that a re-arrangement takes place in BOTH of them.

Conformation is any one of the infinite number of possible arrangements of atoms in a molecule that result from the rotation of atoms around single bonds. Conformations of a molecule are not isomers, but merely twisted versions of the original molecule.

Isomers are molecules with the same molecular formula, but different structural or spatial arrangements of the atoms within the molecule.

It is this lack of understanding that is preventing me from answering the below questions:

Is molecule B a conformer or isomer of Molecule A? ( I think conformer because per the definition, atoms are rotating around single bonds, but technically is the molecular formula the same making it an isomer?)

Is molecule C a conformer or isomer of Molecule A? ( I think conformer because per the definition, atoms are rotating around single bonds, but technically is the molecular formula the same making it an isomer?)

CHM136H1 Lecture 3: Alkanes & Their Stereochemistry (Lectures 7-9)

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