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chapter 4
carbon and the molecular diversity of life
18
Biology
Not Applicable
05/04/2005

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Term
hydrocarbon
Definition
organic molecules consisting only of carbon and hydrogen.
Term
isomers
Definition
compounds that have the same molecular formula but different structures. therefore, different properties.
Term
structural isomers
Definition
isomers that differ in the covalent arrangements of their atoms.
Term
geometric isomers
Definition
all the same covalent partnerships, but they are different in their spatial arragements.
Term
enantiomers
Definition
molecules that are mirror images of eachother.
Term
functional groups
Definition
components of organic molecules most commonly involved in chemical reactions.
Term
hydroxyl group
Definition
hydrogen atom is bonded to an oxygen atom.

-OH
Term
carbonyl group
Definition
carbon atom joined to an oxygen by a double bond.


C=O
Term
aldehyde
Definition
organic compound located at the end of a carbon skeleton.

|
C=O
|
H
Term
ketone
Definition
carbonyl connecting different groups.


|
C=O
|
Term
carboxyl
Definition
oxygen atom double-bonded to a carbon atom that is also bonded to a hydroxyl group.


-COOH
Term
amino group
Definition
consists of a nitrogen atom bonded to two hydrogen atoms and to the carbon skeleton.


-NH2
Term
sulfhydryl group
Definition
sulfur atom bonded to a hydrogen atom


-SH
Term
phosphate group
Definition
phosphate ion covalently attached by one of its oxygen atoms to the carbon skeleton. (^- = negative)
O
||
-O-P-O^-
|
O^-
Term
alcohols
Definition
organic compounds containing hydroxyl groups.
Term
carboxylic acid
Definition
compounds containing carboxyl groups. (organic acids)
Term
amines
Definition
organic compounds containing an amine group.
Term
thiols
Definition
organic compounds that contain sulfhydryls.
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