Ethylene (IUPAC name: ethene) is a hydrocarbon which has the formula C2H4 or H2C=CH2. It is a colourless, flammable gas with a faint "sweet and musky " odour when pure. [7] . It is the simplest alkene (a hydrocarbon with carbon–carbon double bonds).

2017年10月27日 · In short, the stronger the acid, the smaller the pKa value and strong acids have weak conjugate bases. pKa values describe the point where the acid is 50% dissociated (i.e. deprotonated). Below are tables that include determined pKa values for various acids as determined in water, DMSO and in the gas Phase.

Ethylene | CH2=CH2 or C2H4 | CID 6325 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

乙烯（IUPAC 名称：乙烯）是一种碳 氢 化合物，其分子式为 C 2H4 或 H2C=CH2。 它是一种无色易 燃气 体，纯净 时带 有淡淡的 甜味 和麝 香 气味。 它是最简单的 烯烃 （具有碳碳 双键 的 碳氢 化合物）。 乙垢广泛用于 化学 工业，其 全球 产量（2016 年超过 1.5 亿吨）超过任何其他 有机化合物。 大部分生产用于 聚乙烯，这是一种广泛使用的 塑料，含有各种链长的乙烯单元的 聚合 物链。 乙倦也是一种重要的天然 植物 激素，在 农业 上用于催熟 果实。 乙烯的水合物是乙醇。 …

Table of Acids with Ka and pKa Values* CLAS * Compiled from Appendix 5 Chem 1A, B, C Lab Manual and Zumdahl 6th Ed. The pKa values for organic acids can be found in Appendix II of Bruice 5th Ed.

pKa Values INDEX Inorganic 2 Phenazine 24 Phosphates 3 Pyridine 25 Carboxylic acids 4, 8 Pyrazine 26 Aliphatic 4, 8 Aromatic 7, 8 Quinoline 27 Phenols 9 Quinazoline 27 Alcohols and oxygen acids 10, 11 Quinoxaline 27 Amino Acids 12 Special Nitrogen Compounds 28 Peptides 13 Hydroxylamines 28

此数据由哈佛大学的David Ripin and David Evans收集，包括以下化合物的 pKa 。 Inorganic Acids Alcohols, Oximes, Hydroxamic Acids, and Peroxides

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Phase behavior Triple point: 104 K (−169 °C), 120 Pa Critical point: 282.5 K (9.4 °C), 50.6 bar Std enthalpy change of fusion, Δ fus H o +3.35 kJ/mol Std entropy change

Other names: Ethene; Acetene; Bicarburretted hydrogen; Elayl; Olefiant gas; C2H4; Athylen; Liquid ethyene; UN 1038; UN 1962 Permanent link for this species. Use this link for bookmarking this species for future reference. Information on this page: Reaction thermochemistry data (reactions 1 to 50) References; Notes; Other data available: