You are given the following species :
` PH_(3), P_(2)H_(6)^(2+), P_(2) H_(5)^(+) and PH_(4)^(+)`
Which of these has least covalent P-H character and why ?

Explanation

To determine which of the given species has the least covalent P-H character, we need to analyze the formal charge distribution among the species. The species provided are:

1. \( PH_3 \)
2. \( P_2H_6^{2+} \)
3. \( P_2H_5^{+} \)
4. \( PH_4^{+} \)

### Step-by-Step Solution:
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