翻訳と辞書 Words near each other ・ Deh Chenar ・ Deh Chenar, Chaharmahal and Bakhtiari ・ Deh Chenar, Fars ・ Degree of Honor Protective Association ・ Degree of ionization ・ Degree of isochronous distortion ・ Degree of parallelism ・ Degree of Pocahontas ・ Degree of polarization ・ Degree of polymerization ・ Degree of reaction ・ Degree of saturation ・ Degree of saturation (traffic) ・ Degree of start-stop distortion ・ Degree of truth ・ Degree of unsaturation ・ Degree programmes of the University of Groningen ・ Degree symbol ・ Degree-constrained spanning tree ・ Degree-preserving randomization ・ Degreed ・ Degrees north ・ Degrees of Certainty ・ Degrees of Connection ・ Degrees of Eastern Orthodox monasticism ・ Degrees of freedom ・ Degrees of freedom (mechanics) ・ Degrees of freedom (physics and chemistry) ・ Degrees of freedom (statistics) ・ Degrees of freedom problem Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Degree of unsaturation ： ウィキペディア英語版 Degree of unsaturation The degree of saturation (also known as the index of hydrogen deficiency (IHD) or rings plus double bonds) formula is used in organic chemistry to help draw chemical structures. The formula lets the user determine how many rings, double bonds, and triple bonds are present in the compound to be drawn. It does not give the exact number of rings or double or triple bonds, but rather the sum of the number of rings and double bonds plus twice the number of triple bonds. The final structure is verified with use of NMR, mass spectrometry and IR spectroscopy, as well as qualitative inspection. ==General formula== The formula for degree of unsaturation is shown here :$DU\; =\; 1\; +\; \backslash frac\; \backslash sum\; n\_i(v\_i-2)$ where $n\_i$ is the number of atoms with valence $v\_i$. That is, an atom that has a valence of ''x'' contributes a total of ''x-2'' to the degree of unsaturation. The result is then halved and increased by 1. There is also another formula to determine the number of double bonds present in an Hydrocarbon :$Double\backslash \; Bond\backslash \; Equivalent\; =(a+1)\; -\; \backslash frac$ where :a = number of Carbon atoms in the compound :b = number of Hydrogen atoms in the compound :c = number of Nitrogen atoms in the compound :f = number of Halogen atoms in the compound 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Degree of unsaturation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.