- 双生児の、(化学;同一原子に2つの官能基がある状態)ェミナルな
- 関
- gemini、geminus、twin
WordNet
- duplicate or match; "The polished surface twinned his face and chest in reverse" (同)duplicate, parallel
- give birth to twins
- grow as twins; "twin crystals"
- either of two offspring born at the same time from the same pregnancy
PrepTutorEJDIC
- 『双生児の一人』;《複数形で》双生児,ふたご / よく似た人(物)の片方;《複数形で》対 / ふたごの;対の / 〈ある都市〉‘を'(…と)姉妹関係にする《+名+with+名》
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/12/26 21:54:47」(JST)
[Wiki en表示]
In chemistry, the term geminal refers to the relationship between two atoms or functional groups that are attached to the same atom. The word comes from Latin gemini meaning "twins".[1] A geminal diol, for example, is a diol (a molecule that has two alcohol functional groups) attached to the same carbon atom, as in methanediol.
The prefix gem may also be applied to a chemical name to denote this relationship, as in a gem-dibromide for "geminal dibromide".
The concept is important in many branches of chemistry, including synthesis and spectroscopy, because functional groups attached to the same atom often behave differently from when they are separated. Geminal diols, for example, are easily converted to ketones or aldehydes with loss of water.[2]
The following example shows the conversion of a cyclohexyl methyl ketone to a gem-dichloride through a reaction with phosphorus pentachloride. This gem-dichloride can then be used to synthesize an alkyne.
The related term vicinal refers to the relationship between two functional groups that are attached to adjacent atoms.
See also
References
- ^ entry for "geminal" in the Oxford online dictionary of American English. Accessed on 2013-01-27.
- ^ Peter Taylor (2002), Mechanism and synthesis, Book 10 of Molecular world. Open University, Royal Society of Chemistry; ISBN 0-85404-695-X. 368 pages.
English Journal
- The utilisation of two detectors for the determination of water in honey using headspace gas chromatography.
- Frink LA1, Armstrong DW1.
- Food chemistry.Food Chem.2016 Aug 15;205:23-7. doi: 10.1016/j.foodchem.2016.02.118. Epub 2016 Feb 23.
- A headspace gas chromatography (HSGC) method was developed for the determination of water content in honey. This method was shown to work with five different honey varieties which had a range of water from 14-16%. It also utilised two different detectors, the thermal conductivity detector (TCD) and
- PMID 27006209
- Tunable reactivity of geminal bis(silyl) enol derivatives leading to selective exo-IEDDA or Sakurai allylation with a β,γ-unsaturated ketoester.
- Gan Z1, Chu Z1, Hu J1, Su Z2, Hu C2, Gao L1, Song Z3.
- Chemical communications (Cambridge, England).Chem Commun (Camb).2016 Aug 9;52(66):10137-40. doi: 10.1039/c6cc04593f.
- Two contrasting pathways in a SnCl4-catalyzed reaction of geminal bis(silyl) enol derivatives with β,γ-unsaturated ketoesters have been achieved by tuning the R group in the enol moiety. While the electron-donating Bn-substituted enol ether undergoes an exo-selective inverse-electron-demand Diels-
- PMID 27457733
- Equation of Motion Theory for Excited States in Variational Monte Carlo and the Jastrow Antisymmetric Geminal Power in Hilbert Space.
- Zhao L1,2, Neuscamman E1,2.
- Journal of chemical theory and computation.J Chem Theory Comput.2016 Aug 9;12(8):3719-26. doi: 10.1021/acs.jctc.6b00480. Epub 2016 Jul 29.
- An equation of motion formalism for excited states in variational Monte Carlo is derived, and a pilot implementation for the Jastrow-modified antisymmetric geminal power is tested. In single excitations across a range of small molecules, this combination is shown to be intermediate in accuracy betwe
- PMID 27398808
Japanese Journal
- ニッケル(0)錯体によるビシクロ[1.1.0]ブタン誘導体とアクリル酸メチルの反応におけるジェミナル二結合開裂の位置選択性
- 触媒反応中間体に関連するアルケニル金錯体の合成化学
- Bulletin of Japan Society of Coordination Chemistry 66(0), 3-11, 2015
- NAID 130005132990
- Azametallametallocene Formation via Double sp<sup>3</sup> C–H Activation of 6-Substituted <i>ortho</i>-Toluidines by a Half-sandwich Acetatoiridium Complex
Related Links
- 化学において、ジェミナル (geminal) とは、同じ原子に結合する2つの官能基の関係を 指す用語である。接頭辞 gem- は、gem-ジブロミドのように化合物名や化学用語の中で 用いられる。 以下の例は、五塩化リンによるシクロヘキシルメチルケトンからgem- ...
- Geminal hydrogens are the hydrogen atoms on the same atom in an organic molecule. eg. 1: H1, H2, and H3 in 1 are on the same carbon atom. Therefore, they are geminal hydrogens. eg. 2: H1 and H2 in 2 are on the same carbon atom.
Related Pictures
★リンクテーブル★
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- geminal、gemini、geminus
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- geminal、geminus、twin
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- geminal、gemini、twin
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- 英
- geminal
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- 双生児
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- trigeminal nerve disorder、trigeminal neuropathy
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三叉神経核
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- trigeminal nucleus
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三叉神経核
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- trigeminal nuclei