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Chem Final- Lect 19
Lecture 19
Question | Answer |
---|---|
From Butane to Decane how many isomers does each have in order of increasing carbons? | 2,3,5,9,18,35,75 |
What does the prefix tell us? | Number of carbon atoms (eg; hex-) |
What does the base tell us? | How many carbons are in the longest continuous chain (single, double, or triple bond) |
What does the suffix tell us? | typically used to indicate functional groups or additional features in organic compounds |
What are the roots for n=1-10? | meth, eth, prop, but, pent, hex, hept, oct, non, dec |
Are Alkanes non-polar or polar? Are they better as solutes or solvents? | non-polar, solvents (dissolver) |
Why are Alkanes non-polar? | C-H --> 2.5-2.1=0.4--> nonpolar covalent |
How does combustion occur in Alkanes if they are generally stable? | Mix oxygen with an Alkane to create carbon dioxide and water |
What are the combustion processes of Alkanes used for? | Indistrial processes, heating, cooking |
What do Alkenes always contain? | one C-C double bond |
Are Alkenes saturated or unsaturated? | unsaturated, fewer than max H atoms |
What is the general formula for Alkenes? | C(n)H(2n) |
What is the simplest Alkene and it's formula? | C2H4, ethylene |
In Alkenes, does a rotation about the C=C bond occur? | No |
What is the shape of the ethylene molecule? | Trigonal planar |
What is the parent name of an Alkene given based on? | The longest continuous chain of carbon that contains the double bond |
How does the ending change from Alkanes to Alkenes? | ane--->ene |
How is the chain of CH for Alkenes numbered? | So the double bond gets the smallest possible number |
Since rotation about a C ═ C double bond does not occur readily, for some Alkenes we can have different ______ arrangement | Spatial |
What is an Alkene called when it has two particular atoms (or groups of atoms) on the same side of the C=C bond? | cis-alkenes |
What is an Alkene called when it has two particular atoms (or groups of atoms) on the opposite side of the C=C bond? | trans-alkenes |
What are cis-alkenes and trans-alkenes called? | geometric isomers |
What is another name for Alkenes? | Olefins |
What are the important reactions of Alkenes called? | Addition reactions |
What is an addition reaction? | Two atoms are added across a double bond |
What happens when H2 is added to an Alkene? | It becomes an Alkane |
What are Cycloalkanes? | Alkanes whose carbon atoms are joined in rings |
What is the general formula for Cycloalkanes? | C(n)H(2n) |
What are the most stable shaped Cycloalkanes? | Bigger pentagon and hexagon |
What do Alkynes always contain? | One C-C triple bond |
Are Alkynes saturated or unsaturated? | Unsaturated |
What is the general formula for Alkynes? | C(n)H(2n-2) |
What is the first member of the Alkynes? What is its formula? | Acetylene, C2H2 |
How are Alkynes named? | Same as Alkenes but with suffix -yne |
What is the combustion reaction for Alkynes with Acetylene? | Acetylene burned in a torch with oxygen gives off an extremely hot flame |
What is the combustion reaction of Acetylene used for? | to cut and wield metals |
What is the molecular formula for 1-hexene? | C6H12 |
What is the molecular formula for 2-hexene? | C6H12 |
What is the molecular formula for 3-heptyne? | C7H12 |