Small molecules with C=C double bonds, called monomers, can join with one another to form long chain molecules called polymers. Thus, acrylonitrile, H₂C=CHCN, polymerizes under appropriate conditions to give polyacrylonitrile, a common starting material for producing the carbon fibers used in composites. (a) Write electron-dot structures for acrylonitrile and polyacrylonitrile, and show how rearranging the electrons can lead to formation of the polymer.

Video transcript

Well everyone's in this video are being told to draw the electron dot structure for styrene and show the formation of polystyrene via era pushing. So staring. This has a formula of c. H5 which means a benzene ring. Alright so the structure for styrene is that we have the spending ring first. So we have double bonds alternating around the structure. Then we have a branch out one being hydrogen. Then we have sort of this double bond action and we just have two more high regions. So this is the structure for starring and for polystyrene we're having additional polymer. So let's do this in red. So polly starring. So the CC pipe on of the vinyl group goes to C. C. Sigma bond between styrene and another starting molecule. So it's kind of just draw to start. Yeah to styron's. So have the spending bring again with alternating pi bonds. Then we have a branch out with a double bond and then just high genes throughout the structure fulfill fill its octet. Will draw another styrene molecule here. So again Benzine ring alternating double bonds, A branched out double bond and then fulfilling the octet with just hydrogen. So we can see we can put the arrow pushing then in green. So we have the double bond going over to this carbon here and then this little blonde was gone and move further to the other styrene molecules. So drawing partially the product we have these two benzene rings that do not move. We didn't do any sort of air pushing on that end. And then we have this plot in our carbon items down, so we see clearly what's going on. So we have a C. H. We have a CH2, and then I'll just draw the squiggly here, meaning just the rest of the molecule, And then we'll have a central carbon here. Ch two. We have another carbon here, that's just H another squiggly going down here. So this right here again, it's just styron's. We have to draw the electron dot structure for styrene to show the formation of polystyrene here via air pushing which we did in the screen color. So my final answer is just going to be this right over here, going from These two star earrings over to the polystyrene.