Question

the image shows a power plant and a lewis structure of the chemical ethanolamine with one of the bond angles and the nitrogen atom indicated. the physical properties of many industrial polymers are controlled by the addition of small molecules called plasticizers. one such plasticizer is mono - methyladipate and its lewis structure is provided in the image. (i) what is the electron domain geometry, and (ii) what is the molecular geometry at the oxygen atom indicated for mono - methyladipate? (i) bent electron domain geometry, (ii) bent molecular geometry (i) trigonal planar electron domain geometry, (ii) trigonal planar molecular geometry (i) tetrahedral electron domain geometry, (ii) tetrahedral molecular geometry (i) tetrahedral electron domain geometry, (ii) bent molecular geometry dont test me yet, i am trying to gain an understanding before attempting to answer this question.

Explanation:

Step1: Determine electron - domain geometry

Count the regions of electron density around the oxygen atom. The oxygen atom has two bonding pairs and two non - bonding (lone) pairs of electrons. The total number of electron domains is 4. According to VSEPR (Valence Shell Electron Pair Repulsion) theory, when the number of electron domains is 4, the electron - domain geometry is tetrahedral.

Step2: Determine molecular geometry

The molecular geometry considers only the positions of the atoms. With two bonding pairs and two lone pairs around the oxygen atom, the lone - pair repulsions cause the molecule to have a bent molecular geometry.

Answer:

(I) tetrahedral electron domain geometry, (II) bent molecular geometry