Molecular shapes seesaw

Seesaw molecular geometty Example SF4 T-shaped molecular geometry Examples CIF3, Brp3 Linear molecular geometry Examples XeF2, F ... 

Because equatorial and axial positions differ, two molecular geometries are possible for SF4. As Figure 9-22 shows, placing the lone pair in an axial position gives a trigonal pyramid, whereas placing the lone pair in an equatorial position gives a seesaw shape. 

C09-0129. Tellurium compounds, which are toxic and have a hideous stench, must be handled with extreme care. Predict the formula of the tellurium-fluorine molecule or ion that has the following molecular geometry (a) bent (b) T-shaped (c) square pyramid (d) trigonal bipyramid (e) octahedron and (Q seesaw. 

The sulfur has five electron domains around it four from the S — F bonds and one from the nonbonding pair. Each domain points toward a vertex of a trigonal bipyramid. The domain from the nonbonding pair wUl point toward an equatorial position. The four bonds point toward the remaining four positions, resulting in a molecular geometry that is described as seesaw-shaped ... 

Practice Problem B For which molecular geometries (linear, bent, trigonal planar, trigonal pyramidal, tetrahedral, square planar, T-shaped, seesaw-shaped, trigonal bipyramidal, square pyramidal, octahedral) can an AB, molecule be nonpolar if there are (a) two drflerent types of terminal atoms and (b) three different types of terminal atoms ... 

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