Coordination Compound or Complex
| Formula / Notation | [ML_n]^x; IUPAC name: [ligands alphabetically, metal, charge] |
|---|---|
| Also Known As | Coordination complex, metal complex, Werner complex, ligand complex |
What is Coordination Compound or Complex?
A coordination compound (or complex) consists of a central atom or ion (usually a transition metal) surrounded by a set of ligands bonded to it through coordinate covalent bonds. The central atom and its ligands form the coordination sphere. Coordination compounds are important in catalysis, bioinorganic chemistry (e.g., haemoglobin), and analytical chemistry.
Formula & Notation
Other Names / Synonyms: Coordination complex, metal complex, Werner complex, ligand 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
A coordination compound (or complex) consists of a central atom or ion (usually a transition metal) surrounded by a set of ligands bonded to it through coordinate covalent bonds. The central atom and its ligands form the coordination sphere. Coordination compounds are important in catalysis, bioinorganic chemistry (e.g., haemoglobin), and analytical chemistry.
Coordination compounds are used as catalysts (Wilkinson's catalyst [RhCl(PPh₃)₃], Ziegler-Natta catalysts), in medicine (cisplatin, carboplatin, EDTA chelation therapy), analytical reagents (EDTA, ferroin), dyes (phthalocyanine pigments), and in extractive metallurgy (gold cyanidation).
Many coordination compounds contain toxic metals (Hg, Pt, Cd, Cr) or toxic ligands (CN⁻, CO). Cyanide-containing coordination compounds can release HCN in acidic conditions. Platinum compounds cause nephrotoxicity and allergic sensitisation. Always consult SDS for specific compounds.
The formula or notation for Coordination Compound or Complex is: [ML_n]^x; IUPAC name: [ligands alphabetically, metal, charge]