## 15.85

$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

Wenting Hu 2H
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

### 15.85

What does it mean to draw a proposed structure for the activated complex?

Naveed Zaman 1C
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am
Been upvoted: 2 times

### Re: 15.85

You're going to draw what the transition state will look like. Basically, it'll look like a variation/combination of whatever the reactant molecules they give you are. All the bonds in the transition states are draw with dotted/dashed lines instead of solid lines because we are representing these bonds in the process of being formed and broken.

So for example, the reaction CH3CHO --> CH3 + CHO, you would draw:

CH3-------CHO

This represents a model of what the transition state/activated complex will look like.

Yixin Angela Wang 2H
Posts: 51
Joined: Thu Jul 27, 2017 3:00 am

### Re: 15.85

The complex refers to the thing formed as the intermediate between reaction and product. It's also used when referring to the form that enzymes take when they bind with substrates.

Angel R Morales Dis1G
Posts: 50
Joined: Sat Jul 22, 2017 3:01 am

### Re: 15.85

Since it is in the transition phase, it is very unstable because it is forming and breaking a bond at the same time. You would have to draw the molecule with on bond being broken, and another being added in its place in order to get the final product.