gle___________Why are they opposite, not adjacent?Trigonal Bipyramid (sp3d hybridization)PF5Use the 5 prong center if your set has one and put five same color rods on for the F's to make a model of phosphorous pentafluoride. If your set does not have a 5 prong center, use the 3 prong center and put a rod through the hole in the middle to make the 4th and 5th positions.GeometryLewis dot diagram# of s bonds on P# of p bonds on S# of lone pairs on PApproximateF1-P-F3 angleApproximate F3-P-F5 angleSF4Remove the F3 rod from the PF5 model to make a model of sulfur tetrafluoride.GeometryLewis dot diagram# of s bonds on S# of p bonds on S# of lone pairs on S Approximate F-S-F angleWhy are two lone pairs in equatorial position?SummaryWhen we consider the models we have made, we see that they all obey the VESPR rules (see your textbook). These are summarized in the table below.Total # s?bonds plus lone pairsHybridization on central atomBond angleOur examples2sp180oBeH2H?C=C?H3sp2120oBF3, NO31-, H2C=CH24sp3109.5oCH4. NH3, H2O H3C?CH3, H2CIC?CClH25sp3d90, 120oPF5, SF46sp3d2900SF6, BrF5, XeF4...
