This invention relates to a process for reacting phenol, mono- and di-alkyl phenols having at least one free o-position with methanol and/or dimethyl ether in the gas phase to form o-substituted phenols in the presence of a catalyst of oxides of iron, chromium, silicon and at least one oxide of an alkaline-earth metal, lanthanum and manganese or in the presence of a catalyst of oxides of iron, chromium, a metal from the group comprising germanium, titanium, zirconium, tin, lead, and at least one oxide of an alkali metal, alkaline-earth metal, lanthanum and manganese.
Generation, low-temperature stabilization, structure, and reactivity of intermediates with low-coordinated carbon, silicon, and germanium atoms
作者:O. M. Nefedov
DOI:10.1007/bf00961022
日期:1991.11
The mechanisms of thermal and photochemical transformations of organic and organometallic compounds which pass through formation of different reactive intermediates were investigated by low-temperature matrix IR spectroscopy. Low-temperature matrix stabilization of the intermediates, the primary products of these reactions, was conducted at 10-15 K. The spectral and structural parameters of the free radicals (CCl3, CCl2Br, CClBr2, CH2CH=CH2, CF2CF=CF2, CH2-C=CH, CH2C=N, CH2Ph, CF2C6F5), halocarbenes and their silicon and germanium analogs, and unstable molecules with double-bond silicon and germanium atoms were obtained as a result.
The ultraviolet absorption spectra of GeO in rare gas matrices
作者:J. Hormes、S. Petersen、R. Scullman
DOI:10.1016/0022-2852(85)90218-8
日期:1985.3
Abstract The absorptionspectra of GeO isolated in raregasmatrices have been investigated in the wavelength region 1150–3000 A using the 2.5-GeV synchrotron in Bonn as a continuum light source. Two vibrational progressions of bands have been found in each of the matrices, in neon, argon, krypton, and xenon. These progressions are situated in the regions 2400–2700 and 1800–2100 A. They have been analyzed
摘要 使用波恩的 2.5-GeV 同步加速器作为连续光源,研究了在稀有气体基质中分离的 GeO 在 1150-3000 A 波长范围内的吸收光谱。在氖、氩、氪和氙的每个矩阵中都发现了两种带的振动级数。这些级数位于 2400-2700 和 1800-2100 A 区域。它们被分析为对应于 A 1 Π- X 1 Σ + 和 E 1 Σ + - X 1 Σ + 系统的气相带,分别。在 1180-1500 A 区域也发现了基体隔离 GeO 的吸收线。
Catalysts for the o-substitution of phenols
申请人:Union Rheinische Braunkohlen Kraftstoff AG
公开号:US04406824A1
公开(公告)日:1983-09-27
This invention relates to a process for reacting phenol, mono- and di-alkyl phenols having at least one free o-position with methanol and/or dimethyl ether in the gas phase to form o-substituted phenols in the presence of a catalyst of oxides of iron, chromium, silicon and at least one oxide of an alkaline-earth metal, lanthanum and manganese or in the presence of a catalyst of oxides of iron, chromium, a metal from the group comprising germanium, titanium, zirconium, tin, lead, and at least one oxide of an alkali metal, alkaline-earth metal, lanthanum and manganese.