Nucleophiles and electrophiles are reaction intermediates having electron rich and electron deficient centres respectively . Hence, they tend to attack electron deficient and electron rich centres respectively. Classify the following species as electrophiles and uncheophiles.
(i) `H_(3)CO^(-)`
(ii) `H_(3)C-overset(O)overset(||)C-O^(-)`
(iii)Cl
(iv)`Cl_(2)C:`
(v) `(H_(3)C)_(3)C^(+)`
(vi) `Br^(-)`
(vii) `H_(3)COH`
(viii) R-NH-R

Explanation

To classify the given species as electrophiles or nucleophiles, we need to analyze each species based on their electronic characteristics.

### Step-by-Step Solution:

1. **Identify Nucleophiles and Electrophiles**:
- **Nucleophiles** are species that are electron-rich and tend to donate electrons. They usually carry a negative charge or possess lone pairs of electrons.
- **Electrophiles** are species that are electron-deficient and tend to accept electrons. They usually carry a positive charge or are neutral species that can act as electron acceptors.

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