Relating to a chemical compound of chlorine and platinum in a lower oxidation state, often written as chlorplatinous.
From chloro- (chlorine) plus platin- (platinum) plus -ous (adjective suffix indicating a lower oxidation state).
In chemistry, the '-ous' and '-ic' suffixes are shortcuts that tell you immediately whether an element is in a lower or higher oxidation state—it's like a secret language chemists use to quickly communicate molecular identities.
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