"New forms of exotic electron pairing could be hiding in the superconducting state of strontium ruthenate, like the novel inter-orbital spin-triplet state that behaves like a spin-singlet state." ...

and electron–nuclear double resonance (ENDOR) spectroscopies revealed that the compound contains two unpaired electrons with parallel spins (a spin-triplet state). Advanced quantum chemical ...

In contrast to the Marcus scenario, many of these cases cannot be described as single electron transfer events. One important example is singlet fission, which is a photo-induced interconversion ...