翻訳と辞書 Words near each other ・ Ligament of head of femur ・ Ligament of malleus ・ Ligament sheath ・ Ligamenta flava ・ Ligamentotaxis ・ Ligamentous laxity ・ Ligamentum arteriosum ・ Ligamentum capitis ・ Ligamentum venosum ・ Ligamenvirales ・ Ligand ・ Ligand (biochemistry) ・ Ligand (disambiguation) ・ Ligand binding assay ・ Ligand bond number ・ Ligand cone angle ・ Ligand dependent pathway ・ Ligand efficiency ・ Ligand field theory ・ Ligand isomerism ・ Ligand K-edge ・ Ligand Pharmaceuticals ・ Ligand-dependent nuclear receptor-interacting factor 1 ・ Ligand-gated ion channel ・ LigandScout ・ Ligang ・ Ligang Bridge ・ Liganga ・ Liganga mine ・ Ligao 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 Ligand cone angle ： ウィキペディア英語版 Ligand cone angle The ligand cone angle (a common example being the Tolman cone angle or θ) is a measure of the size of a ligand. It is defined as the solid angle formed with the metal at the vertex and the hydrogen atoms at the perimeter of the cone (see figure). Tertiary phosphine ligands are commonly classified using this parameter, but the method can be applied to any ligand. The term cone angle was introduced by Chadwick A. Tolman, a research chemist at Dupont. Originally applied to phosphines, the cone angles were originally determined by taking measurements from accurate physical models of them. ==Asymmetric cases== The concept of cone angle is most easily visualized with symmetrical ligands, e.g. PR3. But the approach has been refined to include less symmetrical ligands of the type PRR'R" as well as diphosphines. In such asymmetric cases the substituent angles half angles, ''θi''/2, are averaged and then doubled to find the total cone angle, θ. In the case of diphosphines the ''θi''/2 of the backbone is approximated as half the chelate bite angle assuming a bite angle of 74, 85, 90 deg. for diphosphines with methylene, ethylene, and propylene back bones respectively. The Manz cone angle is often easier to compute than the Tolman cone angle. :$\backslash theta\; =\; \backslash frac\; \backslash Sigma\; \backslash frac$ 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「Ligand cone angle」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.