Select the correct formula for the coordination compound "Dichloridobis (ethane-1,2-diamine) cobalt(III) chloride"

$[CoCl_2(en)_2]Cl$

The correct answer is Option (1) → $[CoCl_2(en)_2]Cl$

The correct formula is determined step by step:

Name: Dichloridobis(ethane-1,2-diamine)cobalt(III) chloride

1. Central metal: Co³⁺ (cobalt(III))
2. Ligands inside the coordination sphere:
• "Dichlorido" → 2 Cl⁻ inside → CoCl₂
• "bis(ethane-1,2-diamine)" → 2 en molecules inside → (en)₂
• Together: [CoCl₂(en)₂]
3. Counter ion: "chloride" → 1 Cl⁻ outside → [CoCl₂(en)₂]Cl