The phosphorus trihalides (PX3) show the following variation in the bond angle X-P-X
Chapter 9, Problem 9.98(choose chapter or problem)
The phosphorus trihalides (PX3) show the following variation in the bond angle X-P-X: PF3, 96.3; PCI3, 100.3; PBr3, 101.0; Pl3, 102.0. The trend is generally attributed to the change in the electronegativity of the halogen. (a) Assuming that all electron domains are the same size, what value of the X- P-X angle is predicted by the VSEPR model? (b) What is the general trend in the X-P-X angle as the electronegativity increases? (c) Using the VSEPR model, explain the observed trend in X-P-X angle as the electronegativity of X changes. (d) Based on your answer to part (c), predict the structure of PBrCI4.
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