The electron spin resonance spectra of CH(SO3)2=and N(SO3)2=

Abstract

The electron spin resonance spectra of the radical CH(SO₃)₂ ⁼ trapped in a single crystal of potassium methane disulphonate and of the isoelectronic radical N(SO₃)₂ ⁼ in the isostructural potassium amine disulphonate crystal are interpreted. The hyperfine couplings for H, ¹³C and ¹⁴N nuclei and the g-factors are given. The unpaired electron occupies a π-orbital of predominantly central-atom 2p character in each case. The spin populations are derived. An unusual feature, prominent in the potassium methane disulphonate case, is the detection of resolved hyperfine coupling to hydrogen nuclei in the host molecules.