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fulvalenes wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 fulvalenes as a ligand 2 references toggle the table of contents fulvalenes 7 languages español français italiano 한국어 português українська 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia redirected from fulvalene compound class fulvalenes a fulvalene is a hydrocarbon obtained by formally cross conjugating two rings through a common exocyclic double bond 1 the name is derived from the similarly structured fulvenes which lack one ring pentafulvalene 2 is also called simply fulvalene the parent structure of this class triapentafulvalene 3 is also known as calicene from the words calix or chalice because of its wine glass appearance in general the parent fulvalenes are very unstable for instance the parent triafulvalene 1 has never been synthesized on the other hand stable fulvalenes can be obtained by proper substitution or benzannulation several members should be stabilized taking into account a dipolar mesomeric form with for instance sesquifulvalene 4 which can be thought of as a tropylium cation joined to a cyclopentadienyl anion both stable and aromatic in this compound the dipolar structure is calculated to contribute 23 to the total structure fulvalenes as a ligand edit tungsten fulvalene complex fulvalenes forms stable organometallic complexes that can be formally considered derivatives of the dianion c 10 h 8 2 akin to two bonded cyclopentadienyl anions ferrocene was isolated from an attempted synthesis of pentafulvalene many compounds are known especially for the early transition metals 2 the bond joining the two rings in some fulvalene complexes can break reversibly 3 references edit the fulvalenes brian halton eur j org chem 2005 3391 3414 doi 10 1002 ejoc 200500231 marta gonzález maupoey vanessa tabernero and tomás cuenca early transition metal fulvalene complexes coordination chemistry reviews 2009 volume 253 pages 1854 1881 doi 10 1016 j ccr 2009 02 013 boese r j cammack k matzger a j pflug k tolman w b vollhardt k p c weidman t w photochemistry of fulvalene tetracarbonyldiruthenium and its derivatives efficient light energy storage devices journal of the american chemistry society 1997 volume 119 p 6757 6773 doi 10 1021 ja9707062 retrieved from https en wikipedia org w index php title fulvalenes oldid 1243879666 category fulvalenes this page was last edited on 3 september 2024 at 22 11 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents fulvalenes 7 languages add topic