Complete the following reactions:
`PhCHO+CH_(3)NO_(2)overset(overset(Θ)(O)H)underset(Delta)rarr (A)`

Explanation

To complete the reaction of phenyl aldehyde (PhCHO) with nitromethane (CH₃NO₂) under basic conditions and heating, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: We have phenyl aldehyde (PhCHO) and nitromethane (CH₃NO₂). The aldehyde contains a carbonyl group (C=O) and a hydrogen atom attached to the carbonyl carbon.

2. **Formation of the Enolate Ion**: In the presence of a base, the hydrogen atom on the carbon adjacent to the nitro group in nitromethane can be abstracted. This results in the formation of a nitronate ion (CH₂NO₂⁻):
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