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Direct product: e.g. B 1 B 2 = (1 -1 1 -1) (1 -1 -1 1) = (1 1 -1 -1) = A 2. Two-dimensional representations. Constructing molecular orbital diagrams. A 1. B 2. B 1. Only atoms left in place need to be considered. Vectors left unchanged contribute 1 to the character
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Direct product: e.g. B1 B2 = (1 -1 1 -1) (1 -1 -1 1) = (1 1 -1 -1) = A2
Only atoms left in place need to be considered. Vectors left unchanged contribute 1 to the character Vectors transformed into their opposite contribute -1 Vectors transformed into other vectors contribute 0
Application of the projection formula: construction of normal modes example