Chapter 4

Chapter 4 - Chapter 4 Carbon and the Molecular Diversity of...

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Chapter 4 Carbon and the Molecular Diversity of Life Concept 4.1 Organic chemistry is the study of carbon compounds. All living organisms are composed of carbon-based chemicals. o Organic molecules are molecules which contain carbon. o Ex. CO, CO2, and all carbon molecules Concept 4.2 Carbon atoms can form diverse molecules by bonding to four other atoms. Carbon atoms are the most versatile building blocks of molecules. (Fig. 4.3) Carbon atom has a valance of four, meaning it can bind to as many as four other atoms. Biological Molecules: Most Common Elements o Hydrogen: valence = 1 o Oxygen: valance = 2 o Nitrogen: valance = 3 o Carbon: valance = 4 Hydrocarbons are molecules that contain only hydrogen and carbon o Major components of fossil fuels o Have and diversity of carbon backbones o Are hydrophobic (i.e. non-polar) because: C-C and C-H are non-polar C and H have similar electro negativities No dipole moment exists between the two atoms Variations in Carbon skeletons (fig. 4.3) Carbon Structural Features (fig. 4.5)-don’t have to memorize Three- Dimensional Structural Features- Isomers o Isomers are molecules which contain the same atoms but have those atoms arranged in different patterns. o
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This note was uploaded on 05/10/2010 for the course BIOL 1201 taught by Professor Wishtichusen during the Summer '07 term at LSU.

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Chapter 4 - Chapter 4 Carbon and the Molecular Diversity of...

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