Which of the following molecular species is not linear?

Options

A. `(CN)_(2)`
B. `OCN^(-)`
C. `XeF_(2)`
D. `XeF_(2)`

Explanation

To determine which of the following molecular species is not linear, we will analyze the molecular geometry of each species mentioned: CN2, OCN^-, XeF2, and H2S.

### Step 1: Analyze CN2
- **Structure**: CN2 (Cyanogen) has a linear structure. The carbon atom is bonded to two nitrogen atoms through a triple bond.
- **Hybridization**: The carbon in CN2 is sp hybridized.
- **Conclusion**: CN2 is linear.

### Step 2: Analyze OCN^-
- **Structure**: OCN^- (Cyanate ion) also has a linear structure. The carbon atom is bonded to an oxygen atom and a nitrogen atom.
- **Hybridization**: The carbon in OCN^- is sp hybridized.
- **Conclusion**: OCN^- is linear.

### Step 3: Analyze XeF2
- **Structure**: XeF2 (Xenon difluoride) has a linear structure. Xenon is bonded to two fluorine atoms and has three lone pairs of electrons.
- **Hybridization**: The steric number is 5 (2 bond pairs + 3 lone pairs), leading to sp3d hybridization.
- **Conclusion**: XeF2 is linear.

### Step 4: Analyze H2S
- **Structure**: H2S (Hydrogen sulfide) has a bent shape due to the presence of lone pairs on the sulfur atom.
- **Hybridization**: The sulfur atom has 6 valence electrons, with 2 bonding pairs and 2 lone pairs, leading to sp3 hybridization.
- **Conclusion**: H2S is not linear; it has a bent shape.

### Final Answer
The molecular species that is not linear is **H2S**.

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