3 years ago

Hyperfine coupling constants of β-phosphorylated nitroxides: Subtle interplay between steric strain, hyperconjugation, and dipole-dipole interactions

Hyperfine coupling constants of β-phosphorylated nitroxides: Subtle interplay between steric strain, hyperconjugation, and dipole-dipole interactions
Solvent effects in β-phosphorylated nitroxides show that nitrogen and phosphorus hyperfine coupling constants a N and a P, increase and decrease with increasing polarity, polarizity, and Hydrogen Bond Donor effects of solvents, respectively. In a series of articles, it was shown that the driving interaction controlling the change in a P is the maximization of the N+•—O … ∙∙∙+PO dipole – dipole interaction. In this work, we show that the steric strain in spiro β-phosphorylated nitroxides affords the opposite trend for a P, that is, a P increases with increasing solvent properties features.

Publisher URL: www.sciencedirect.com/science

DOI: S004040201730399X

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