Spin multiplicity - Wikipedia, the free encyclopedia
In quantum mechanics, spin multiplicity denotes the number of possible quantum states of a system with given principal spin quantum number S. The different states are distinguished by the spin proje...
en.wikipedia.org/wiki/Spin_multiplicity
Term symbol - Wikipedia, the free encyclopedia
In quantum mechanics, the Russell-Saunders term symbol is an abbreviated description of the angular momentum quantum numbers in a multi-electron atom. It is related with the energy level of a giv...
en.wikipedia.org/wiki/Term_symbol
multiplicity (spin multiplicity) The number of possible orientations, calculated as 2S + 1, of the spin angular momentum corresponding to a given total spin quantum number (S), for the same spatial electronic wavefunction.
www.iupac.org/goldbook/M04062.pdf
In a free ion, electronic transitions involving a change in the number of unpaired electrons are forbidden (they do not conserve spin angular momentum). However, spin-orbit coupling makes such transitions possible, although with low probability.
scienceworld.wolfram.com/chemistry/SpinMultiplicityRule... scienceworld.wolfram.com/chemistry/SpinMultiplicityRule.html
Abstract;An efficient treatment to calculate the spin multiplicity of low-dimensional ferromagnetic polymers was developed at the level of ROHF and UHF methods.
sciencelinks.jp/j-east/article/200214/000020021401A1051... sciencelinks.jp/j-east/article/200214/000020021401A1051972.php
The combined results of X-ray analysis with theoretical calculation, IR, and UV-vis spectroscopy reveal that a slight conformational change of the radical pair causes the drastic spin-multiplicity change during 2-140 K. (author abst.
sciencelinks.jp/j-east/article/200223/000020022302A0877... sciencelinks.jp/j-east/article/200223/000020022302A0877402.php
The results concerning both the geometry and the spin multiplicity of the ground-state contrast with those obtained from previous calculations based on density functional theory.
www.medscape.com/medline/abstract/15847461
DFT calculations (UB3LYP/6-31+G**) have been performed to predict the substituent effect on the ground-state spin-multiplicity and the singlet-triplet energy gap in cyclobutane-1,3-diyls, CB-DR. ... Ob/Gyn & Women's Health ... This website also contains material copyrighted by 3rd parties.
www.medscape.com/medline/abstract/12585920
, of the spin angular momentum corresponding to a given total spin quantum number ... IUPAC > Gold Book > alphabetical index > M > multiplicity (spin multiplicity) ... for the same spatial electronic wavefunction. A state of singlet multiplicity has...
goldbook.iupac.org/M04062.html
The calculation of nuclear shieldings for paramagnetic molecules has been implemented in the ReSpect program, which allows the use of modern density functional methods with accurate treatments of spin-orbit effects for all relevant terms up to order (4) in the fine structure constant. ... Compared to previous implementations,
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