# What is the specific structure of Poly(allylamine hydrochloride) (C3H7N)n HCl?

I'm working with Poly(allylamine hydrochloride), and I found that the chemical formula is $$\ce{(C_3 H_7 N)_{n}. HCl}$$ But I need a diagram like below, but more explicit. I mean with the carbons, where they are exactly?

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I found a web page, with a lot information of my molecule. What I was looking for is that kind of diagram (the one with 3D aspect). That is the structure of the allylamine hydrochloride, now I want to know what is the structure of the poly(allylamine hydrochloride).

• Name and formula in the title do not fit! The monomer is allylamine hydrochloride, a more suitable representation thus would be $\ce{[C3H7N*HCl]}_n$ Feb 27 '14 at 22:03

My intuition is telling me that, based on your empirical formula and the image you provided, all three carbons are at the bends in the line-notation as is conventional in bond-line notation. The structure inside the brackets is repeated virtually indefinitely, as shown with the $n$ at the bottom right of the image. I have circled the alleged carbons in the image.
As for the structure in the polymer, we should be able to determine from the bond-line notation that if each carbon is $sp^3$ hybridized, then as the bends suggest we have a molecule which bends roughly 109.5° between all of the Carbon-R bonds. This can be visualized as a tetrahedral shape where the Carbon atom sits in the center of the geometric shape and the atoms that it bonds to are at the corners.
Now given that the Nitrogen atom is $sp^3$ hybridized, since it has 3 covalent bonds (and one lone pair that is left off for clarity), it should have bond angles of ~108° between itself and either of the two Hydrogen or the one Carbon atom allowing a 'trigonal pyramidal' shape. Not very easy to imagine after staring at this picture, which is why we use model kits to help us visualize the molecules.