Singlet And Triplet Electronic State. The 1 tt state is a singlet excited state with double excitation characters and differs from 2 t 1 not only by the electronic and spin entangled nature of the former but also by the presence of orbital overlap which changes its excitation energy from the sum of two triplet energies. The key difference between singlet and triplet state is that singlet state shows only one spectral line whereas triplet state shows the threefold splitting of spectral lines.
The term singlet originally meant a linked set of particles whose net angular momentum is zero that is whose overall spin quantum number s 0 displaystyle s 0. When the electron spins are parallel their individual spin momenta add together to give non zero total spin and this can be achieved in three ways. The key difference between singlet and triplet state is that singlet state shows only one spectral line whereas triplet state shows the threefold splitting of spectral lines.
The key difference between singlet and triplet state is that singlet state shows only one spectral line whereas triplet state shows the threefold splitting of spectral lines.
And a triplet state has two unpaired electrons and sh. E t h 11 h 22 j 12 k 12. As a result there is only one spectral line of a singlet state. And the energy of the triplet state is given as.
