noun
- a compound that has the same number of atoms and the same structure as another compound but differs in the identity of one or more atoms
Usage: chemistry; technical
Examples
- Sulfur dioxide and nitrogen monoxide are isologues because they both contain three atoms arranged in a similar molecular structure.
- In organic chemistry, isologues help chemists understand how substituting one element for another affects molecular properties.
- The isologue relationship between two compounds can reveal important patterns in chemical reactivity.