The Reactions of NH Radicals with Ethylene and Propene in the Liquid Phase
作者:Takashi Kitamura、Shigeru Tsunashima、Shin Sato
DOI:10.1246/bcsj.54.55
日期:1981.1
concentration of hydrogen azide in the range of 0.8–8×10−2 mol dm−3. The reaction of NH(a1Δ) radicals with olefin consists of three processes: the addition to double bond, the insertion into the C–H bond, and the deactivation to the 3Σ− state. The branching ratios and the relative rate constants of the reactions of NH(a1Δ) radicals with ethylene, propene, and ethane were estimated.
Synthesis, Crystal Structure, and Physical Properties of the New Chain Alkalioxocuprate K3Cu2O4
作者:Katarina Đuriš、Reinhard K. Kremer、Martin Jansen
DOI:10.1002/zaac.201100031
日期:2011.7
chains builtupfrom planar, edge sharing CuO4 square units. From an analysis of the Cu–O bond lengths, the valence state of either +2 or +3 can be unambiguously assigned to each copper atom. The magnetic susceptibilities show the dominance of antiferromagnetic (AFM) interactions. At high temperatures, the magnetic behaviour can be fitted with the Curie–Weiss law (μeff = 1.84μB, Θ = –105 K). The experimental
K3Cu2O4 单晶由 KN3、KNO3 和 CuO 各自的化学计量混合物在 923 K 下通过叠氮化物/硝酸盐途径制备,而粉末样品通过 K2O、KCuO2 和 CuO 的固态反应合成,密封在金安瓿中并在723 K。根据单晶结构分析(Cmcm, Z = 4, a = 6.1234(1), b = 8.9826(2), c = 10.8620(2) A, R1 = 0.044, R2 = 0.107),主要结构特征是由平面、边缘共享的 CuO4 方形单元构成的起伏的 CuO2 链。从 Cu-O 键长的分析中,+2 或 +3 的价态可以明确地分配给每个铜原子。磁化率显示反铁磁 (AFM) 相互作用占主导地位。在高温下,磁性行为符合居里-魏斯定律(μeff = 1.84μB,Θ = –105 K)。
THE QUANTUM YIELD IN THE PHOTOCHEMICAL DECOMPOSITION OF HYDROGEN AZIDE
作者:Arnold O. Beckman、Roscoe G. Dickinson
DOI:10.1021/ja01364a020
日期:1930.1
08 mm., the rate of decrease of po2 may be calculated from the measurements of Bodenstein and Lindner to be only 2.4 X mm./hour a t 22”. Hence, by keeping the pressures of the reaction products sufficiently small, i t might be possible to treat the reaction simply as a photochemical decomposition rather than as a photochemical equilibrium. In order to measure the small amount of reaction product present
介绍 在一篇关于“过氧化氮中的光化学平衡”的论文中,Norrish 描述了实验,其中 . 当石英容器中的 NO2 被石英汞蒸气灯照射时,观察到压力增加。在光照条件下,压力起初迅速增加,然后缓慢增加,并在大约 15 分钟后达到一个明显恒定的值。当照明被切断时,压力首先迅速下降,然后较慢地接近其原始值。仅靠加热无法解释压力增加。Norrish 假设 NO2 被光化学分解为 NO 和 O2;当 NO 和 O2 的复合速率与 NOz 的光分解速率相等时,压力就达到恒定。这一假设得到了在各种 NOz 压力下和最初存在 NO 或 O 2 时进行的实验结果的确认。这两种气体都降低了压力增加,并且 NO 比 0 2 更有效地减少了压力增加,正如从复合率 2 与 pkOpo 成正比的事实所预期的那样。本文首先描述了一些定性实验,进一步检验了诺里什关于 NO2 光化学分解为 NO 和 O2 的观点的正确性,然
Formation of trinuclear complexes with bisacyl-π-allyl ligands from palladium acetate and pyrylium salts
Trimeric palladium acetate reacts with 2,6-disubstituted pyryliumsalts to give trinuclear bis-acyl-allylpalladium acetates. The structure of bis(1,3-dipyvaloyl-π-allyl)trispalladium(II) μ-tetraacetate is determined by an X-ray study.