OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

RELATION BETWEEN NUCLEAR INDUCTION MULTIPLETS AND MOLECULAR ELECTRONIC STRUCTURE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/7298

Show full item record

Files Size Format View
1954-M-5.jpg 140.5Kb JPEG image Thumbnail of RELATION BETWEEN NUCLEAR INDUCTION MULTIPLETS AND MOLECULAR ELECTRONIC STRUCTURE

Title: RELATION BETWEEN NUCLEAR INDUCTION MULTIPLETS AND MOLECULAR ELECTRONIC STRUCTURE
Creators: McConnell, Harden
Issue Date: 1954
Abstract: Electron-spin coupled internuclear interactions which give rise to nuclear induction ""spin-spin"" multiplets can be expressed in terms of a second-order magnetic interaction between two electron spins and two nuclear $spins.^{1,2}$ It can be shown that the extent to which magnetic nucleus K interacts with magnetic nucleus L in molecule M (to give nuclear induction multiplets) depends, in part, on the extent to which there is a nonrandom correlation of the electron-spin polarizations on atoms K and L. This correlation of the electron spins associated with nuclei K and L is readily understood when nuclei K and L are directly bonded to one another by a single homopolar electron pair bond: when the electron spin on K is ""up,"" the electron spin on L is ""down"" and vice versa. Nuclear spin-spin interactions have now been observed for nuclei separated from one another by as many as four bond lengths---this implies an effective long-range correlation of electron-spin polarizations. Calculations of such long-range spin polarizations have been made using the molecular-orbital and valence-bond approximations. It has been found that both of these approximations can account qualitatively for these long-range electron-spin correlations; it can be shown however, that quantitative expressions for spin-spin interactions are quite sensitive to the inclusion of interactions frequently neglected in ""classical"" descriptions of molecular electronic structure, e.g., spin-orbit interactions.
URI: http://hdl.handle.net/1811/7298
Other Identifiers: 1954-M-5
Bookmark and Share