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Solution: Consider the three compounds shown below and then answer the...

Question

Consider the three compounds shown below and then answer the questions that follow: 

(b) Which compound contains a nitrogen atom with trigonal pyramidal geometry? 

Video Transcript

Hey guys. So, in this problem we need to figure out which one of these compounds has a nitrogen with a trigonal pyramidal molecular geometry, okay? So let's take a look and guys for the molecular geometry of trigonal pyramidal we do need four different groups, right? So, immediately you can go ahead and look at the ones that don't look, right? That have four different groups, right? Well, really quickly we know that each one of these nitrogen also has a lone pair, right? Because it's a neutral charge, okay? It's got three bonds but guys only one of these actually has three, four different groups on it, okay? It's a trigonal pyramidal, this one has one carbon over here, so that's one group and then a second group would be the lone pair, right? So we can go ahead and cross this one out, how about B? Well, B looks like it has three bonds, three different groups and a lone pair, so it's got a fourth group, guys actually this has trigonal pyramidal geometry, what about this one over here? well, we've got this hydrogen, that's one group then we've got this carbon over here, that's the second group but we've only got a third group as a lone pair, right? So we can definitely go ahead and cross out this one, so guys B is the only one that has a trigonal pyramidal nitrogen. Alright guys, let's move on.

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