What kind of bond does PCl3 have

Type of binding of PCl3?


My chemistry teacher sent me an assignment on electronegativity. Somehow I don't really get along with the material he made available to me. I've tried a lot, but I always end up in a dead end. Is there any method, tactic or instruction for solving such a task? I've watched a lot of videos, but unfortunately I haven't found a solution anywhere.

The following was given to me:


I'll start very simply. Imagine tug of war being a very popular sport. There is a table that shows how good a tug-of-war is for all athletes. The values ​​range from 0.0 (very bad) to 4.0 (super good). If now athlete A with a value of 3.0 meets athlete B with 2.1, it is clear what happens: A pulls the rope closer to him.

There is a very similar property to atoms in the case of atoms, but here you don't pull a rope (I hope that doesn't surprise you), but rather the electrons covalent Binding.

How much an atom pulls on the electrons of a covalent bond is indicated by the electronegativity value. The larger the value, the harder it is pulled. However, the difference between the two EN values ​​must be greater than / equal to 0.5, otherwise (as good as) nothing happens.

If you now replace the athletes with atoms, e.g. athlete A is chlorine and athlete B is hydrogen, then the following happens:

Chlorine attracts the electrons more strongly than hydrogen, so the electrons are now closer to the chlorine. If the electrons with their two negative charges are exactly in the middle of the bond, then both atoms are neutral. But now, due to the shift of the electrons, the chlorine has a little more negative charge in its vicinity and the H-atom has ´lossed` some negative charge.

Now the important result of this process:

In such a connection, the Cl atom is permanently slightly negatively charged (they say: negatively polarized) and the H atom is accordingly slightly positively charged (positively polarized).


Think of 5 stable (noble gas rule fulfilled) molecules that only have covalent bonds and in which at least one bond has an EN difference of 0.5 or greater.

The best thing to do is to send me a picture of these connections with the partial load shown.

You will also draw 2 molecules of each compound and show how the molecules are arranged in relation to each other in the liquid phase (that means: liquid).

Thanks for the help in advance!

Have a nice day everyone :)