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Molecular Shape and Polarity

Molecular Shape and Polarity - Molecular Shape and Polarity...

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Molecular Shape and Polarity By Joseph Shapiro Lab Instructor: Robert Neuman November 2, 2007
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Results and Discussion In this experiment molecular models were made on a computer using the Spartan program. The first models made were ammonia NH 3 and SF 4. Next models were made of the molecules from the prelab. In the prelab the molecules CH3CL, PCL5, and NO3- were drawn using the VESPR theory. The information from these models and the models produced with the Spartan program are compared below. Molecular Models From Spartan Program Molecule Shape Bond Angles( ° ) Dipole CH 3 CL tetrahedral 108.46, 110.47 2.25 D towards CL PCL 5 trigonal bypyramidal 102.32, 87.39 .65 D down from top CL NO 3 - trigonal planar 120, 30 none (For the models from the Spartan program bond lengths and partial charges are also known but since they cannot be compared to the VESPR theory models they are not displayed here.) Molecular Models From VESPR Theory Molecule Shape Bond Angles( ° ) Dipole CH 3 CL tetrahedral 109.5 towards Cl PCL5 trigonal bipyramidal 120, 90 none
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