thiocyanate
Definition
Noun: A thiocyanate is a chemical compound that is a salt or ester of thiocyanic acid (HSCN). It contains the functional group -SCN. Thiocyanates are typically formed through the reaction of alkaline cyanides with sulfur.
Usage
Thiocyanates are primarily discussed in chemistry contexts. The term refers to the anion [SCN]⁻ or to compounds containing this group. * The thiocyanate ion is a common ligand in coordination chemistry. * Potassium thiocyanate is often used in laboratory demonstrations.
Examples
- The test for ferric ions involves the formation of a blood-red complex with thiocyanate.
- Silver thiocyanate is a pale yellow, insoluble solid.
- She studied the bonding properties of the thiocyanate ligand in the metal complex.
Advanced Usage
- Pseudohalide: The thiocyanate ion is often classified as a pseudohalide due to its similarity in behavior to halide ions like chloride.
- Ambidentate Ligand: In inorganic chemistry, thiocyanate is noted for being an ambidentate ligand, meaning it can bond to a metal center through either the sulfur atom (S-bonded) or the nitrogen atom (N-bonded).
Variants and Related Words
- Thiocyanic Acid (noun): The unstable acid, HSCN, from which thiocyanates are derived.
- Isothiocyanate (noun): A related compound with the functional group -N=C=S, often found in nature (e.g., in mustard oils). This is a distinct compound, not a variant of thiocyanate itself.
- Rhodanide (noun): An older, less common synonym for thiocyanate.
Synonyms
- Rhodanide (historical/technical)
- Sulfocyanate (historical/technical)
Different Meanings
The word "thiocyanate" has a single, specific meaning in scientific terminology and does not have common idiomatic or non-technical definitions.
Noun
-
a salt of thiocyanic acid; formed when alkaline cyanides are fused with sulfur
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