Coordination Compounds Class 12 Chemistry Notes – Formulas & Quick Revision

Coordination Compounds mein IUPAC naming, isomerism, VBT aur CFT aate hain — NEET/JEE ka high-weightage chapter. Yahan aapko is chapter ke sabse important formulas aur quick revision points free milte hain — NCERT/CBSE syllabus ke hisaab se, boards aur JEE/NEET dono ke liye.

Important Formulas & Concepts — Coordination Compounds

• Werner theory: primary (ionisable) + secondary (coordination number) valency
• Ligands: monodentate (Cl⁻, NH₃), bidentate (en, ox), ambidentate (NO₂⁻/ONO⁻, SCN⁻/NCS⁻)
• EAN = Z − OS + 2×CN
• Naming: ligands alphabetically → metal → OS (Roman)
• Isomerism: structural (ionisation, linkage, hydrate) + stereo (geometrical, optical)
• VBT: d²sp³ inner orbital (low spin), sp³d² outer (high spin)
• CFT: octahedral splitting Δ₀ — t₂g (lower) aur eg (upper)
• Strong field ligands (CN⁻, CO) pairing karate hain; weak (F⁻, Cl⁻) nahi

Quick Revision Points

• Spectrochemical series rato: I⁻ < Br⁻ < Cl⁻ < F⁻ < OH⁻ < ox < H₂O < NH₃ < en < CN⁻ < CO
• [Ni(CN)₄]²⁻ square planar diamagnetic; [NiCl₄]²⁻ tetrahedral paramagnetic
• Chelate effect stability badhata hai
• MA₂B₂ square planar mein cis-trans; octahedral MA₃B₃ mein fac-mer
• [Co(NH₃)₆]³⁺ inner orbital, [CoF₆]³⁻ outer orbital — classic pair

FAQ

Naming mein galti hoti hai?

PDF mein naming ka step-by-step flowchart + 15 solved names hain.

Hybridisation kaise predict karu?

Ligand strength → pairing → orbitals count — PDF ke VBT table se seedha answer.

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