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It is a trigonal planar molecule; this resembles a 2D equilateral traingle with an Aluminium atom in the middle and the 3 chlorine atoms situated at each of the 3 points on the triangle. The bond angles are 120 degrees. Other examples of trigonal planar molecules are boron trifluoride (BF3) or boron trichloride (BCl3). It is a trigonal planar molecule; this resembles a 2D equilateral traingle with an Aluminium atom in the middle and the 3 chlorine atoms situated at each of the 3 points on the triangle. The bond angles are 120 degrees. Other examples of trigonal planar molecules are boron trifluoride (BF3) or boron trichloride (BCl3).

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16y ago

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