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Updated: Aug 16, 2026

Spin Saturation Transfer Difference NMR (SSTD NMR): A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
Published on: November 12, 2016
Parity and heteroatom effects on open-shell exchange interactions: nitrenophenyl iminoylnitroxides
Patrick Taylor1, Paul R Serwinski, Paul M Lahti
1Department of Chemistry, University of Massachusetts, Amherst, MA 01003, USA.
Abstract:
Photolysis of pN3PhIN and mN3PhIN in frozen matrix yields pNPhIN and mNPhIN, respectively. pNPhIN gives a quartet state with nonlinear ESR intensity behavior (|D/hc| = 0.300 cm(-1), |E/hc| congruent with 0.0 cm(-1)); mNPhIN gives a thermally excited quartet state (|D/hc| = 0.336 cm(-1), |E/hc| = 0.006 cm(-1)) with inverse Curie behavior. Computations show little nitrene delocalization onto the radicals even for the para system. The NPhIN systems behave differently from analogous nitronylnitroxides due to asymmetric radical spin distribution. [reaction: see text]
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