The carbon-magnesium bond in a Grignard reagent is covalent and highly-polarized such that the carbon is negatively charged. Which of the following statements can be used to describe the Grignard carbanion? Select all that apply.
-Grignard reagents are weak nucleophiles
-Grignard reagents are strong nucleophiles
-Grignard reagents are strong bases
-Grignard reagents are weak bases
