 Okay, let's talk about alt-teams again remember you can have Anything that's got a double bond is an alkene. Remember we talked last time we can have cis alkenes Or trans alkenes where the big group trans So where the big group is on opposite side cis So it's on the same side or Z remember the same side So you can have these types of alkenes These are both called dye substituted alkenes why because They've got two substituents That are carbon so these are both dye Let's continue along without so we can have this type of an alkene. This is called a monosubstituted alkene Why because there's only one carbon bonded to it, right? So all of the other ones All the other things bonded to the alkene remember the functional group alkene are hydrogens So we only have the one R group remember our R is just anything Monosubstituted or we can call these terminal alkene Okay, why because they're always at the end of the chain because we got a hydrogen here So these ones Are not terminal right because there's a carbon on either side of the alkene you guys see that So here there's only a carbon on one side of the alkene here. There's a carbon on Both stuff right both stuff. So we call these internal Okay, so in turn internal alkenes terminal We can have trisubstituted alkene like that Is that gonna be a terminal alkene? What is it? Internal Right because why because there's a carbon here carbon here we can add things on to any of those sites, right? This is called a trisubstituted and of course we can also have a lot very good And is that a terminal alkene? No, it's an internal one why? Because we can add something on top all of those stuff right remember we can't add something to a hydrogen We can only make one bond so here Only types of terminal alkenes are mono substituted with trisubstituted with the isubstituted trisubstituted and tetrasubstituted We can have isomers remember geometric isomers that we talked about last time So if the big groups are on the same side, we'll say a is bigger than B This is a tetrasubstituted And A that's a six okay, you got to watch that so we got a here a here Be here right trans Okay, so all of the internals can be trans or sits Okay, so watch for the geometric isomerization and there are some Examples of alkenes, but since you can't see them on the video. I'll kill any questions Any questions on any of those? They're all alkenes right?