Table 2.

BH₄ radical cation hyperfine tensors following the notation of Stoll et al. [15]. These hyperfine tensors are derived from fits by EasySpin of the CW-EPR and ENDOR spectra with coincident g and hyperfine tensor axes.

Nucleus	Assigned Position	Hyperfine Tensor (MHz)
1H exchangeable	N5	[−12, −52, −27]
14N	N5	[0, 0, 64]
1H	C6	[46, 46, 44]
1H	C7 (tentative)	[4.0, 14.0, 8.0]
1H exchangeable	N8 (tentative)	[2.5, 5, 6.5]