f s bonds on CApproximate H-C-H angelMax # atoms (incl. C) in one planeIs there a mirror plane(divides the molecule in equal halves) ?H3C?CH3 Construct a model of ethane using a tetrahedral center for each C and the same color rods for all 6 H's with a C?C bond present.GeometryLewis dot diagram# of s bonds on each CApproximate H-C-H angleApproximate H-C-H angleThe C-C bond is a single bond and has free rotation about it. Arrange the ethane molecule so that each C?H bond on one C atom is exactly parallel to a C?H bond on the second C atom. (This is the eclipsed position.) View this arrangement by looking along the C?C bond such that the atoms on the front C blank out those on the back C. From this view the model is represented as in I ( a Newman projection.)Now rotate the front carbon 60 degrees clockwise producing II.Which of the above arrangements allows more space per atom?Which arrangement would you expect to be more stable?CIH2C?CH2ClMake a model of 1,2?dichloroethane by replacing an H atom with a C1 atom on each C in your ethane model. Use a different color rod to show the C1 atoms. The eclipsed Newman projection is given in 111. Rotate the front C by 60 degrees and show the result on IV, rotate another 60 degrees and show the result on V, etc., until you have completed a 360 degree rotation about the front C. Remember that a C1 atom is much larger than an H atom Which of the structures would you expect to be the most stable?Explain why.Which of the structures would you expect to be the least stable? Explain why.NH3, Use a tetrahedral center for the N atom and three rods of the same color for the 3 H's to make a model of ammonia.GeometryLewis dot diagram# of s bonds on N# on non-bonding pairs on NApproximate H-N-H angleH2OUse a tetrahedral center for the O atom and two rods of the same color for the 2 H's to make a model of water.Sketch the geometryDraw a dot diagram# of s bonds on O# on non-bonding pairs on OApproximate H-O-H angl...
