00:01
Okay, so for problem a, we have a cyclohexane or a cyclohexanol, and we have a cyclohexyl.
00:11
And let me draw that better.
00:13
I'm not used to drawing cyclohexane sideways, i don't much care for drawing them that way.
00:19
And the question is, is this bond or does this bond have the higher bond association energy? to answer this question, we need to refer to the table, table 6 .2, which gives us bond association energies for some common.
00:34
Bonds and what we're going to be looking for is breaking a carbon oxygen bond and breaking a carbon sulfur bond right so right so at the very bottom of the table we have that breaking a carbon oxygen bond in k -cals per mole that is roughly 93 to 96 k -kals per mole that is roughly 93 to 96 k -kals per mole depending on what exactly the carbon chain is, right? so there isn't one that corresponds explicitly to a cyclohexel, but we can assume that it's going to be somewhere between 93 and 96.
01:34
Well, what about the carbon sulfur bond? you may notice that carbon sulfur bonds aren't actually mentioned at all in this table, right? but we can glean something from what is directly beneath this table.
01:52
And that is that when you increase the size of an atom, in this case, sulfur is is soelectric with oxygen, but simply larger, you decrease the energy of the bond.
02:05
In the same way that it's easier to break a carbon iodine bond than it is to break a carbon fluorine bond, less energy than carbon.
02:15
And fluorine, it's easier or lower energy to break a carbon -sulfer bond than it is to break a carbon -oxygen bond.
02:23
And this has to do with the fact that sulfur is electronically the same as oxygen...