carbon and the molecular diversity of life. the properties of carbon that make it so important you...
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Carbon and the Molecular Diversity of Carbon and the Molecular Diversity of LifeLife
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The Properties of Carbon that make it so
important
You Must Know
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• Although cells are 70–95% water, the rest
consists mostly of carbon-based compounds
• Carbon is unparalleled in its ability to form large, complex, and diverse molecules
Carbon Overview
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• Organic chemistry is the study of
compounds that contain carbon
• Organic compounds range from simple molecules to colossal ones
• Most organic compounds contain hydrogen atoms in addition to carbon atoms
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Carbon atoms can form diverse molecules by
bonding to four other atoms
This leads to formation of large, complex, and diverse molecules
4.2
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So why carbon?
1) It has 4 Valence Electrons 2) It can form up to 4 Covalent Bonds 3) These can be single, double, or triple 4) It can form large molecules 5) These can be chains, ring-shaped, or
branched
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Hydrocarbons are organic molecules
consisting of only carbon and hydrogen
Many organic molecules, such as fats, have hydrocarbon components
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The valences of carbon and its most frequent
partners (hydrogen, oxygen, and nitrogen) are the“building code” that governs the architecture of living molecules
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Isomers are compounds with the same
molecular formula but different structures and properties: Structural isomers have different covalent
arrangements of their atoms Geometric isomers have the same covalent
arrangements but differ in spatial arrangements Enantiomers are isomers that are mirror
images of each other
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Enantiomers are important in the
pharmaceutical industry Two enantiomers of a drug may have different
effects
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A small number of chemical groups are key to
the functioning of biological molecules Functional groups are the components of
organic molecules that are most commonly involved in chemical reactions
The number and arrangement of functional groups give each molecule its unique properties
4.3
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The seven functional groups that are most
important in the chemistry of life: Hydroxyl group Carbonyl group Carboxyl group Amino group Sulfhydryl group Phosphate group Methyl group
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