Figure 4.42 shows the EPR spectra for two isotropic systems in which the unpaired electron interacts with two ¹⁴N nuclei (I = 1). 

(a) Use Fig. 4.42a to calculate the gyromagnetic factor of the paramagnetic species if the spectrum was measured at 9.75GHz. 

(b) Which EPR spectrum in Fig. 4.42 indicates the interaction of the unpaired electron with two equivalent nitrogen nuclei? 

(c) Calculate the values of the hyperfine coupling constants for both cases in Fig. 4.42.

Figure 4.42

Transcribed Image Text:

3350 3350 3400 3400 3450 3450 (a) (b) 3500 3500 3600 3550 Magnetic field, B/gauss 3600 3550 Magnetic field, B/ gauss