CM2111 AY2021-lecture1-postlecture.pdf - 1 Transition Metal...

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Transition Metal Chemistry Coordination Chemistry Organometallic Chemistry Bioinorganic Chemistry Supramolecular Chemistry Catalysis Medicinal Chemistry Solid State-Materials Catalysis 1 Homogeneous Heterogeneous Molecular Electronics Molecular Electronics 1
CM1111 What holds atoms together and the structure/chemistry of main group elements CM2111 What holds molecules together (and their structure) and the structure/chemistry of transition metals 2
Solid state Chemistry 3
Solid state chemistry and daily life We use solid state materials for their physical properties in our daily life Solid state chemistry is all around us! 4
The structure of solids can vastly change their properties Polymorphs of TiO 2 (titania) 5
Can be broadly classified into: Crystalline solids • atoms, ions, or molecules arranged in an orderly array • definite melting point, heat of fusion and crystal lattice • Packed more efficiently • Crystalline solid has long range order Quartz Types of Solids Glass Amorphous solids • no regular molecular or atomic arrangement • do not give diffraction pattern • No long range order 6
How can we tell if something is crystalline?
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Unit Cell : The smallest repeating unit of a crystalline structure, in 3D, which shows the full symmetry of the structure. Unit cells must link up without gaps between adjacent cells. All unit cells must be identical. Unit cells must show the full symmetry of the structure. Requirements for unit cells 8
Examples for unit cells Na + Cl
This is NOT a unit cell even though they are all the same.

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