Synthesis of an Organogallium(I) Compound Ga(CH2CMe2Ph)n with EPR Spectral Evidence for Gallium Clusters
Abstract
The organogallium(I) compound Ga(CH2CMe2Ph)n has been prepared by the reduction of Ga(CH2CMe2Ph)2 Cl by using either sodium or lithium with naphthalene in THF. The yellow dihydronaphthalene gallium(III) intermediate M2?C10H8?Ga(CH2CMe2Ph)2Cl2! initially formed at -78 deg C but then decomposed at higher temperatures to form Ga(CHeCM2Ph)n, Ga(CH2CMe2Ph)3 and MCl. EPR spectra, which were recorded as the two yellow intermediates Na2?C10H8Ga(CH2CMe2R)2Cl2! (R = Ph, Me) decomposed, indicated the presence of radicals. The first and second derivatives of the EPR signals, line-widths, g-values and hyperfine coupling constants are consistent with the radicals being clusters of organogallium species. The experimental spectra were simulated by the superposition of two spectra, a single Gaussian shaped line with a peak-to-peak width of 14 mT (92%) with the spectrum of 5 equivalent gallium nuclei, A = mT (8%). The even number of lines observed in the experimental spectra indicate an odd number of gallium nuclei with at least five being required to give the number of observed lines.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 27, 1998
- Accession Number
- ADA355337
Entities
People
- Matthew J. Noble
- O. T. Beachley Jr.
- Robert D. Allendoerfer
Organizations
- University at Buffalo