V [4] (Hg salt: m.p. 128 to 129 "C.) with n-butyllithium [3]. Thus, it is easier to remove a bromine cation from compound 11 than a proton [5]: GHsLi I1 ---+ (%H&P=CHz + (CnHs)P=CHBr The desired bromomethylenation can be realized with lithium piperidide 161 which predominantly removes protons from
✦ LIBER ✦
Lithium concentration dependence of implanted helium retention in lithium silicates
✍ Scribed by D.E. Szőcs; E. Szilágyi; Cs. Bogdán; E. Kótai; Z.E. Horváth
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 466 KB
- Volume
- 268
- Category
- Article
- ISSN
- 0168-583X
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Energy-transfer efficiencies between C?+ and Nd3+ various concentrations of Cr3+ and Nd'+. were measured in lithium-lanthanum-phosphate glasses doped by The transfer efficiencies obtained by decrease of donor lifetimes revealed different bekvior from those calculated directly from the increase of Nd