<p>The boron was sp hybridized so two hydrogens sigma bonded with the sp orbitals in a linear geometry. There are two P orbitals left, and assuming (without a loss of generality) that the Px orbital was used for the hybrid, the other two P orbitals are sticking up in the plane of the paper and directly out of the plane of the paper. One of those will be empty; the other will bond with the remaining hydrogen. But you didn’t have to draw any empty orbitals, so it should just look like <em>|</em> where the three ends have H’s and the middle is boron. That’s what I thought anyway.</p>
<p>aaahh that makes sense…i just drew a trigonal planar BH3
btw…was the last arrow pushing mechanism a reaction or resonance? (it was the one with carbons and hydrogens)</p>
<p>wow the more we talk about this… the more scared i get. </p>
<p>do you think we are getting this back tomorrow?</p>
<p>yeah…he said so in lab lecture today</p>
<p>i know he said the avg was 110. also, in class he never mentioned what the standard deviation and highest score was?</p>
<p>so howd you do?</p>
<p>i heard he said that the standard deviation was 29?</p>
<p>i got 120/150. worse than i thought. i really hated that page where we had to pick resonance or product. i could have gotten 18/24 instead of 12/24.</p>
<p>this std dev is crazy…an A would mean getting a 139+
thats stupid</p>
<p>an A is 92%? it was like 80% for frechet’s first midterm lol</p>
<p>yea this is so dumb i cant even believe</p>
<p>yeah i hope that standard deviation is wrong.</p>
<p>does anybody know where the answers are posted?</p>
<p>i asked him for the std dev. he told me that number himself
i still cant believe how messed up this curve is</p>
<p>yeah hrhcow, i got the same as you did on the resonance/product page…i hated that one. also, on that one for the first one i incorrectly circled resonance instead of product and the gsi subtracted three…w t f? i mean for the other ones i missed they gave me 0-this is a mistake on the gsi’s part right? cause then i could get a 15/24 on that one instead…</p>
<p>BAD standard deviation…GRRRRRRRRRRRRRRRRRR</p>
<p>Uhhh for the person who said why the cut off for Frechet’s midterm was 80% for an A…well you have to realize our averages were like a ~70-80 out of 160. You can’t really expect the same cut off when the average is much higher.</p>
<p>@calbear: are you talking to me? i didn’t ask why…</p>
<p>^^lol</p>
<p>137</p>
<p>i’m gonna miss chem :(</p>
<p>can’t say i agree with you…loved frechet, liked chem, messed up the exams big time. im glad that stress is over. my memory just isn’t what it needs to be :(</p>