Complex Ions
| Formula / Notation | [ML_n]^x+; stability: β_n = [ML_n]/([M][L]^n) |
|---|---|
| Also Known As | Coordination complex, coordination ion, metal complex, Werner complex |
What is Complex Ions?
Complex ions (coordination ions) consist of a central metal ion bonded to a number of ligands (molecules or anions with lone pairs) through coordinate (dative) covalent bonds. The number of ligands is the coordination number. Examples include [Fe(CN)₆]⁴⁻, [Cu(NH₃)₄]²⁺, and [AlF₆]³⁻. Complex ions are studied in coordination chemistry.
Formula & Notation
Other Names / Synonyms: Coordination complex, coordination ion, metal complex, Werner complex
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Complex ions (coordination ions) consist of a central metal ion bonded to a number of ligands (molecules or anions with lone pairs) through coordinate (dative) covalent bonds. The number of ligands is the coordination number. Examples include [Fe(CN)₆]⁴⁻, [Cu(NH₃)₄]²⁺, and [AlF₆]³⁻. Complex ions are studied in coordination chemistry.
Complex ions are fundamental in coordination chemistry, analytical chemistry (EDTA complexes for water hardness determination, colorimetric tests), medicine (cisplatin, MRI contrast agents like Gd-DTPA), industrial catalysis (Wilkinson's catalyst, Ziegler-Natta), and biochemistry (haemoglobin Fe²⁺, …
Toxicity of complex ions depends on both the metal and the ligand. Cyanide complexes can release HCN in acid. Chromate and dichromate complexes are carcinogenic oxidants. Heavy metal complexes (Hg, Pb, Cd) are highly toxic. Always use appropriate PPE and consult SDS.
The formula or notation for Complex Ions is: [ML_n]^x+; stability: β_n = [ML_n]/([M][L]^n)