Answers are grounded in this paper and cite their sources.
Polyatomic molecules can exist as nuclear spin isomers. For example, the ortho and para hydrogen spin isomers are characterized by different values of specific heat, boiling point, heat of vapor formation, and so forth (1). Hydrogen has been the only substance whose spin modifications are well studied and available for practical use.
No takes yet. Share an insight, caveat, or question.
Tikhonov et al. (2002) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: