platinous
Definition
Adjective (Chemistry): Relating to platinum in a lower valence state, specifically platinum with a valence of +2 (as opposed to platinic, which refers to +4 valence).
Usage Examples
- (A chemical compound where platinum has a +2 oxidation state.)
- (Chemical substances with platinum in the +2 state are less stable than those with +4.)
- (A salt containing platinum in the +2 oxidation state was formed.)
Advanced Usage
"Platinous ion": a platinum ion with a +2 charge.
- The platinous ion forms complexes with ammonia ligands. (The Pt²⁺ ion bonds with ammonia molecules.)
"Platinous state": the condition of platinum having a +2 oxidation number.
- In this reaction, platinum is reduced to the platinous state. (Platinum gains electrons to become Pt²⁺.)
Variants and Related Words
Platinic (adj): relating to platinum in a higher valence state, especially +4.
- Platinic chloride is a reddish-brown compound. (A compound with platinum in the +4 state.)
Platinum (n): the metallic element itself.
- Platinum is a precious metal used in jewelry and catalysts. (The element Pt.)
Synonyms
- Divalent platinum: platinum with a valence of +2.
- Platinum(II): the chemical notation for the +2 oxidation state.
Related Idioms
- None commonly used; "platinous" is a technical term primarily in chemistry.
Additional Notes
- Usage context: "Platinous" is almost exclusively used in chemistry textbooks, research papers, and laboratory settings. It is not a word found in everyday conversation.
- Formation: The suffix "-ous" in chemistry typically indicates a lower oxidation state in a series of compounds (e.g., ferrous vs. ferric, cuprous vs. cupric). "Platinous" follows this pattern.