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Classify each alkyl halide as 1$^\circ$, 2$^\circ$, or 3$^\circ$.
Classify each pair of compounds as isomers or resonance structures.
What molecular ions would you expect for the compound depicted in the ball-and-stick model?
Three components of the sex pheromone of the female sand bee ($Ophrys\ sphegodes$) are saturated hydrocarbons containing 23, 25, and 27 carbon atoms. How many H atoms does each of these alkanes contain? Interestingly, the early spider orchid emits a similar hydrocarbon mixture to attract male sand bees to pollinate its flowers.
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Hello, everyone. Welcome to example, four of our structure and bonding lecture in this example were given us form a C two h seven and were asked, Why can't organic molecules such as this exists in nature? So now we need to go back through everything we learned in our lecture and everything we've seen in the problems to kind of explain this example. So if you talk about carbon, we know that carbons can Onley have four things around it. For it to be neutral, it is possible to have carbon with three things around it. That's what we call a carb okada. So a car broke. Adan is a carbon that only has three things around it and it is going to be highly, highly, highly reactive on dis susceptible to nuclear feel like attack. However, a neutral carbon will have four things attached to it. And now, if I specifically draw, it's lone pair. Sorry, it's Valence electrons. We know that carbon has four valence electrons. So now if I draw the molecules C two So now this carbon will also have four valence electrons. Remember, In order to be stable, we need to must satisfy the octet rules. You must have eight valence electrons. So now let's use some of those seven hydrogen. Is that air shown in example So 123 So we have 123 electron. So now this carbon has 2468 So this carbon is happy. It is satisfied its valence electrons need to satisfy the octet rule. So now we have three hydrants used up. So now we can have another force. We have 123 four. But now, if I draw these valence electrons here we see that. And now this carbon also has eight valence electrons left. So now this one hydrogen here it has nothing to bind to because, remember, equivalent bond is bounded between in atoms that share electrons but nothing. There's no more valence electrons on carbon to share with this one Valence electron of hydrogen. It can't really bound bind to anything because there's no more of that chance available or Frito have, uh, to bind with. So because of that, organic formulas would like This cannot exist because now there's an extra hydrogen that cannot bind anything. What can exist is C two h six. And that's exactly what we saw in previous examples that, uh, methane molecule here. So remember, when we're trying to determine if organic formula is valid or not, think about the lewis dot structure. Think about the octet rule. Think about how many bonds are needed for molecule to be neutral on, or even when it's charged, like nitrogen or oxygen.
Nuclear Magnetic Resonance Spectroscopy
Acids and Bases