Questions: - An electrostatic potential map of boron trifluoride is shown - Is BF3 likely to be a nucleophile or an electrophile? Why? - Draw a Lewis structure for BF3 - Nucleophile or electrophile or both? Where? - Water - Amine - Bromide ion

- An electrostatic potential map of boron trifluoride is shown
- Is BF3 likely to be a nucleophile or an electrophile? Why?
- Draw a Lewis structure for BF3
- Nucleophile or electrophile or both? Where?
- Water
- Amine
- Bromide ion
Transcript text: - An electrostatic potential map of boron trifluoride is shown - Is $\mathrm{BF}_{3}$ likely to be a nucleophile or an electrophile? Why? - Draw a Lewis structure for $\mathrm{BF}_{3}$ - Nucleophile or electrophile or both? Where? - Water - Amine - Bromide ion
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Solution

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Solution Steps

Step 1: Determine the Nature of BF\(_3\)

Boron trifluoride (BF\(_3\)) is a molecule where boron is bonded to three fluorine atoms. Boron has only six electrons in its valence shell in this configuration, making it electron-deficient. This electron deficiency makes BF\(_3\) an electrophile, as it tends to accept electrons to complete its octet.

Step 2: Draw the Lewis Structure for BF\(_3\)

The Lewis structure of BF\(_3\) involves boron (B) at the center with three single bonds to three fluorine (F) atoms. Each fluorine atom has three lone pairs of electrons, and boron has no lone pairs, resulting in a total of six valence electrons around boron.

\[ \begin{array}{c} \text{F} \\ \vert \\ \text{B} - \text{F} \\ \vert \\ \text{F} \end{array} \]

Step 3: Determine the Nature of Other Species
  • Water (H\(_2\)O): Water is a polar molecule with a partial negative charge on the oxygen atom, making it a nucleophile. It can donate a pair of electrons.
  • Amine (RNH\(_2\)): Amines have a lone pair of electrons on the nitrogen atom, making them nucleophiles. They can donate electrons.
  • Bromide Ion (Br\(^-\)): The bromide ion is a negatively charged ion with extra electrons, making it a nucleophile. It can donate electrons.

Final Answer

  • BF\(_3\) is an electrophile because it is electron-deficient and can accept electrons. \(\boxed{\text{Electrophile}}\)
  • Lewis structure of BF\(_3\): \(\boxed{\text{B with three single bonds to F, each F with three lone pairs}}\)
  • Water, amine, and bromide ion are nucleophiles. \(\boxed{\text{Nucleophiles}}\)
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