Which of the following molecules can form hydrogen bonds?

Question

Accepted Answer

Hello everyone today. We have the following problem. Consider the following molecules como chloral, methane, hydrazine, fennel, carbon, tetrachloride. Which molecule has the ability to form a hydrogen bond with another molecule of the same type. So recall that hydrogen bonding occurs in compounds where the hydrogen is directly attached to a highly electro negative atom such as nitrogen, oxygen or flurry. So we're gonna draw the lewis structure of each molecule. So first we're gonna work with our como chloral methane. First we're gonna take our carbons, hydrogen bromine and chlorine. We're gonna see how much of each we have. So carbon is a group for a element and therefore has four valence electrons. Since there's only one of them we're gonna have four electrons for carbon, hydrogen is a group one A. Elements and so has one valence electron. Since there's only one, we're gonna have one electron for hydrogen bromine and chlorine. Our group seven A. Elements and therefore they have seven valence electrons or the hydrogen should be too. But since there's only one of each halogen here we're gonna have seven electrons each. This brings the total 2 20 electrons to compose the structure. And so if you were to complete the structure carbon preferring to be in the center we're gonna have carbon bonded to these two hydrogen and this carbon is also bonded to a booming and our chlorine and a chlorine. And so if we look at this molecule does it have a hydrogen connected to a nitrogen oxygen or flooring? No. So we can say that bromo, chloral, methane is not part of our answer. So we can get rid of answer choice A and any other answer choices that includes them. So A E and F. Next we're gonna move on to hydrazine and that's our in two H four. We're gonna do the same process. Nitrogen, hydrogen, nitrogen is a group of five A element and therefore has five valence electrons. Since there are two of them we have 10 electrons for that hydrogen as before as a group. One element has one valence electron. And since there are four of them, we have four electrons giving us a total Of electrons to construct it. And so if we were to construct this in the proper way we would have these two nitrogen connected to one another And each of them is bonded to two hydrogen. Since we have two leftover electrons, we're gonna give those two electrons to each nitrogen. So if you look at this, does this structure have a hydrogen bonded to a nitrogen oxygen or flooring? Yes, this has hydrogen bonded to a nitrogen has four of them actually. So structure be can exhibit hydrogen bonding. So be has to be included in our answer. If we move on to our fennel, you know, is going to be our carbon six H 50. H. And it's going to be represented carbon, hydrogen and oxygen. Carbon is a group of foreign element. Four valence electrons and there are six of them giving us 24 electrons, Hydrogen one a. So it has one valence electron. There are five of them here, With our six of them here. So we have six electrons. And oxygen's is a group six a element. So it has six valence electrons. There's only one. So we have six electrons for oxygen. In total, we have 36 electrons. If we were to drop final out we would have a ring structure as such With three double bonds in the middle and it's going to be wrapped with this hydroxide ring. And so does this structure also have a hydrogen connected to a nitrogen oxygen or flooring? Yes, So we're gonna say that see also has to be our answer. And if we go to our last structure here, which is carbon tetra florin, we have carbons and florian's carbon has four valence electrons. There's only one here. So we have four electrons. Flooring has seven valence electrons because it's a group seven A. Element and we have four of them. So we have 28 for flooring giving us a total Of 32 electrons. And if we were to draw the structure out, we would simply have a carbon bonded to a flooring flooring and two other florins. And so this does not have a hydrogen directly attached to it that is bonded to a nitrogen, oxygen or flooring, so that it does not exhibit hydrogen bonding. So therefore our answer is going to be both B and C or F. And with that we have solved the problem overall, I hope this helped, and until next time.

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Which of the following molecules can form hydrogen bonds?

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