a neutral divalent free radical, such as methylene: CH2
carbene in American English
(ˈkɑːrbin)
noun
the radical CH2 and its derivatives
Word origin
[carb- + -ene]carb- is a combining form used in the names of chemical compounds in which carbon is present.Other words that use the affix carb- include: carbanion, carbenicillin, carbide, carboxypeptidase, thiocarbanilide; -ene is a suffix used to form names of unsaturated hydrocarbons (anthracene; benzene), esp. those of the alkene series (butylene)
Examples of 'carbene' in a sentence
carbene
These species exhibit either electrophilic or nucleophilic character, depending on the carbene and metal fragments.
Dan Zhang, Zhenghui Kang, Junwen Liu, Wenhao Hu 2019, 'Metal-Dependent Umpolung Reactivity of Carbenes Derived from Cyclopropenes', iSciencehttp://www.sciencedirect.com/science/article/pii/S2589004219300987. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
In addition, no byproducts derived from carbene coupling were observed.
Pedro J. Pérez, M. Mar Díaz-Requejo, Iván Rivilla 2011, 'Gold-catalyzed naphthalene functionalization', Beilstein Journal of Organic Chemistryhttps://doi.org/10.3762/bjoc.7.77. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The related silver carbene compound could not be isolated.
Pierre-Henri Lanoë, Btissam Najjari, Florine Hallez, Geoffrey Gontard, Hani Amouri 2017, 'N-Heterocyclic Carbene Coinage Metal Complexes Containing Naphthalimide Chromophore:Design, Structure, and Photophysical Properties', Inorganicshttps://www.mdpi.com/2304-6740/5/3/58. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Two ruthenium olefin metathesis initiators featuring electronically modified quinoline-based chelating carbene ligands are introduced.
Karolina Żukowska, Eva Pump, Aleksandra E. Pazio, Krzysztof Woźniak, Luigi Cavallo,Christian Slugovc 2015, 'Consequences of the electronic tuning of latent ruthenium-based olefin metathesiscatalysts on their reactivity', Beilstein Journal of Organic Chemistryhttps://doi.org/10.3762/bjoc.11.158. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The thermal or photochemical decay of azide 6 leads to cyano(trimethylsilyl)carbene.
Klaus Banert, Manfred Hagedorn, Zhuang Wu, Xiaoqing Zeng 2015, 'Synthesis, Characterization and Reactions of (Azidoethynyl)trimethylsilane', Moleculeshttp://www.mdpi.com/1420-3049/20/12/19770. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
These effects result in the cooling of carbene modes at all voltages compared to the “clean” carbene-based junction.
Giuseppe Foti, Héctor Vázquez 2017, 'Adsorbate-driven cooling of carbene-based molecular junctions', Beilstein Journal of Nanotechnologyhttps://doi.org/10.3762/bjnano.8.206. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
They readily promote the decomposition of diazo compounds and transfer the resulting carbene toa variety of substrates.
Emily E. Edwards, Stephen D. Williams 2004, 'Scalar Relativistic Study of the Structure of Rhodium Acetate', International Journal of Molecular Scienceshttp://www.mdpi.com/1422-0067/5/2/67/. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Thiazolium carbene-catalyzed reactions of 1,2-diketones and 1,2,3-triketones withenones and ynones have been investigated.
Ken Takaki, Makoto Hino, Akira Ohno, Kimihiro Komeyama, Hiroto Yoshida, Hiroshi Fukuoka 2017, 'NHC-catalyzed cleavage of vicinal diketones and triketones followed by insertion ofenones and ynones', Beilstein Journal of Organic Chemistryhttps://doi.org/10.3762/bjoc.13.176. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Synthesis of hydroazulene derivatives has been carried out through a ring-enlargement routeby using carbene adduct intermediates.
Zakir Hussain, Henning Hopf, Khurshid Ayub, S. Holger Eichhorn 2012, 'Synthesis of 2,6-disubstituted tetrahydroazulene derivatives', Beilstein Journal of Organic Chemistryhttps://doi.org/10.3762/bjoc.8.77. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)