A model for BrF_3 is shown in the Jmol window BrF_3 has T-shaped geometry. Rotat

Question

A model for BrF_3 is shown in the Jmol window BrF_3 has T-shaped geometry. Rotate the molecules until you have a feeling for its three-dimensional shape. How many F atoms are bonded to the central Br atom? Are all of the positions about the central atom equivalent, or are there two kinds of positions? A T-shaped molecules can be derived from a trigonal bipyramidal molecules by removing two of the outer atoms. Would the atoms removed be both axial, both equatorial, or one of each? What approximate angle at the Br atom does the unique F atom make with either of the other two F atoms? degrees. For practice, type in the name of the geometry of the molecule.

Explanation / Answer

1)3 F atoms are bonded to Br

2)2 Axial and 3 equatorial positions are there around the central atom

3)Two atoms are removed from equatorial position to make it T shaped as those two positions are occupied by lone pairs of electrons (at this position no 90 deg lone pair -lone interaction and only one lp-bond pair interaction takes place,relatively stable structure)

4)90 degrees with the plane containing the central Br and two lone pairs

5)sp3d T-shaped(trigonal bipyramidal)

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