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Organic Chemistry #1
lecture #1
Question | Answer |
---|---|
Functional Group | A collection of atoms within a molecules with a common bonding pattern. |
Arenes | Aromatic hydrocarbon rings like the 6-carbon ring benzene. |
Alkyl Halide | A carbon based molecule attached to a halogen |
Halogen | Elements from group 17 (fluorine, chlorine, bromine, iodine) |
Alcohol | C bonded to the O of a hydroxyl group |
Hydroxyl group | OH |
Ether | Two carbons bonded to the same O |
Amine | Carbon bonded to an N |
Thiol | C bonded to an SH group |
Sulfide | Two C's bonded to the same S |
Carbonyl groups | C=O (carbon with a double bond to an oxygen atom). Because the O is more electronegative in all of these the carbonyl C has a partial positive charge (sensitive and reactive) and the O has a partial negative charge. |
Aldehyde | One H bonded to a C=O |
Ketone | two C's bonded to the C=O group |
Carboxylic Acid | An OH bonded to a C=O (COOH). These are present in organic acids |
Alkanes | Hydrocarbons with only single bonds C-C and C-H bonds, no functional groups. They can form long and branched chains. They have only sigma bonds. They are saturated (w/H's). The bonds are nonpolar=no H bonds=not water soluble. All tetrahedral angles. |
Aliphatic molecules | Organic compounds with no rings. |
Alkyl groups | Derivatives of alkanes missing one H (for example "methyl"=CH3 |
Ring strain | Deviation from the ideal 109.5 degree angles between C atoms results in instability of cycloalkanes. The fewer carbons in a cycloalkane, the less stable (cause the more deviations). |
Primary carbon | Carbon bonded to just one other carbon. |
Secondary carbon | Carbon bonded to 2 other carbons |
Tertiary carbon | Carbon bonded to 3 other carbons |
Carbon degree significance | The more carbons to which a carbon is bonded, the weaker the carbon's bonds with the H atoms. |
Stereoisomers | Isomers of spacial arrangement |
Constitutional isomers | Difference connections between atoms but the same chemical formulas |
Hydrocarbon Boiling Points | The more atoms in the hydrocarbon, the higher the boiling point. |
Prefix "iso-" | A branch on the carbon one before the end. |