1a. It is possible to represent molecules in a bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional way with a 'bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional' diagram (left) or a bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional style (right).

1b. The methane molecule (above) has bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional covalent bonds.


2a. The water molecule has bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional covalent bonds.


2b. Hydrogen chloride has just bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional covalent bond.


2c. The carbon dioxide molecule has bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional covalent bonds.


3a. Although these bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional diagrams above give an accurate picture of how the atoms are linked in the molecule, they do not give a full spatial representation of the molecule.
3b.In the case of methane, the top right diagram gives a bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional view of the molecule.
3c. Many organic molecules, especially in biochemistry, have complex structures whose 3D structure has importantant consequences for their chemistry e.g. a bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional docking into a specific bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional.
3d. We now know so much about molecular structure you can now use bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional to 'mimic' the complete 3D spatial structure of a molecule.
3e. The diagram of ethane on the right is an example of bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional and shows the positions of atoms relative to each other and the bond anglesdot and crossdoubleenzyme moleculefourmolecular modellingonesimulation softwaresinglestructural formulasubstrate moleculethree dimensionaltwotwo dimensional defined by the positions of three atoms in a molecule.

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