The Z Dependence of Coupling Constants between Directly Bonded Nuclei: The Value of J(73Ge-13C).
Abstract
The Fermi contact contribution to the reduced, nuclear spin-spin coupling constant of directly bonded atoms, K sub XN, has been studied by determining the Z dependence of the electron spin density at the nuclei of the isolated atoms. Two methods of calculating the spin density from atomic spectra were tested and the results are employed to determine K sub XN. It is concluded that K sub XN for series of isoelectronic, isostructural compounds varies as Z (sub X) n, where n is a relativistic correction which ranges from 1.0 to about 2.5 depending on Z sub X. The theoretical results are compared with experimental data for symmetrical compounds with bonds of the type XF, XH, and XC, and apparent core polarization contributions to K sub XN are noted. The directly bonded coupling constant between 73Ge and 13C has been measured in tetramethylgermane; it is 18.7 0.9 Hz. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 12, 1971
- Accession Number
- AD0721717
Entities
People
- Don K. Dalling
- Herbert S. Gutowsky
Organizations
- University of Illinois Urbana–Champaign