Draw a Lewis structure for a compound with molecular formula C4H11N in which three of the carbon atoms are bonded to the nitrogen atom. What is the geometry of the nitrogen atom in this compound? Does this compound exhibit a molecular dipole moment? If so, indicate the direction of the dipole moment.
Hey guys. So, in this problem we need to go ahead and figure out a structure for C4H11N that has three carbons 2 directly attached to the nitrogen, okay? So let's go ahead and do that, well we know that nitrogen is going to be in the center and then we have three carbons, right? But we're also told that we have four carbons in our compound, right? So we just add a carbon to one of them, and guys don't worry we from have all of our hydrogens here, right? We've got three, six, nine, eleven. So, good. Guys, remember we've also got a lone pair on this nitrogen, okay? So guys, let's also figure out our geometry, our geometry here, right? How many groups do we have on our nitrogen? we've got four, right? We've got these two carbons, these 2 methyl groups, this ethyl and this lone pair, right? So that's four groups where one of them is a lone pair and we know that's going to be a trigonal pyramidal geometry, so let's actually go ahead and draw it in the way that it should be drawn, okay? we know that we should still have a nitrogen in the middle, our lone pair on top, we can put our ethyl group off to the side because it's a little bit easier to draw, we have a methyl on the wedge and a methyl on the dash, right? Guys there we go, that is exactly, what it should look like, right? More or less, given my artistic ability, and we do we have a dipole? Remember, that a dipole is caused by a difference in electronegativity, right? And we know that carbon is not as electronegative as nitrogen. So, nitrogen is going to pull electron density away from the carbons and guys we know that some of these are going to cancel, right? We know this wedge methyl and this wedge methyl are going to cancel and they're going to interfere with this one over here, but one thing we though we do know for sure is that we're going to have a net dipole pulling up to the nitrogen. Alright guys, let's move on.