Chemistry of Methylgallium(III) Compounds in Protic Solvents.
Abstract
The chemical properties of as well as routes to the formation of methylgallium (III) compounds in aqueous acidic solutions and in other protic solvents have been investigated. Aqueous perchloric acid solutions of Me2GaC10 at room temperature are surprisingly resistant to hydrolytic cleavage of the gallium-carbon bond. Only 14% of the available methyl groups of Me2GaC104 when dissolved in 0.0171 M HC104 are converted to CH4 after a three month time period. In contrast, Me2GaC104 undergoes a significantly faster methyl transfer reaction with Ga(C104)3 in aqueous HC104 solution to form MeGa+2 which in turn hydrolyzes to form Ga+3 and methane. Approximately 36% of the initially available methyl groups from CH4 in thgree months. The dimethylgallium cation also methylates Hg+2 to form MeGa+2 and MeHg(aq) in aqueous solution but Me2Ga(aq) does not react with A1+3(aq), Zn+3(aq) or Na(+)(aq). In a second series of experiments the methylation of gallium (III) by Me2Co(BDM1,3 pn) was investigated in ethanol and acetone solutions by using UV titration and 1H NMR data. The observed stoichiometry of the reaction requires one mole of Ga(C104)3 for every two mols of Me2Co(BDM1,3 pn). The identified products are Me2Ga(+) and MeCo(BDM1,3 pn).(+) In contrast, gallium (III) is not methylated by methylcobalamin in aqueous solution.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 14, 1986
- Accession Number
- ADA174111
Entities
People
- O. T. Beachley Jr.
- R. J. Bianchini
- R. U. Kirss
- T. L. Royster
Organizations
- University at Buffalo