For my project, I have to build a polypeptide chain from the polymerization reaction of two amino acid molecules (glycine). Since the bond angles have to be exact, my question is would the circled parts of the chain be considered trigonal planars? (as in the molecule is 2-D at these parts)?

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Question

For my project, I have to build a polypeptide chain from the polymerization reaction of two amino acid molecules (glycine). Since the bond angles have to be exact, my question is would the circled parts of the chain be considered trigonal planars? (as in the molecule is 2-D at these parts)?

http://prntscr.com/2sxnm2

aaronq · Answer

yeah both of the circled parts are (each) trigonal planar. planar = 1 plane = flat.

anonymous · Answer

Can I also ask what angles the side group (R) and hydrogen on the right side are attached at? As well as the angle in which the next nitrogen is bonded on the left side. I've been researching for hours, but can't seem to find those angles for a polypeptide chain. They only give as much as the angles of the bond.

anonymous · Answer

The main peptide linkage**

Hydrogen is the R-group for a chain formed by glycine.

aaronq · Answer

the R and H are in a tetrahedral position so ~109.5 from each other, (half from the amide bond plane), though they're probably distorted a little bit, the other nitrogen is the same as the first,|dw:1392594501245:dw|