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tetrakis cyclopentadienyl uranium iv 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 synthesis and properties 2 references 3 external links toggle the table of contents tetrakis cyclopentadienyl uranium iv 2 languages فارسی 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 chemical compound tetrakis cyclopentadienyl uranium iv names iupac name tetrakis η 5 cyclopentadienyl uranium iv other names tetracyclopentadienyluranium u cp 4 identifiers cas number 1298 76 6 y 3d model jsmol interactive image chemspider 67033592 n pubchem cid 129665404 inchi inchi 1s 4c5h5 u c4 1 2 4 5 3 1 h4 1 5h q4 1 4 key oqdgqbkhumgqkf uhfffaoysa n smiles ch 1c cc c1 ch 1c cc c1 ch 1c cc c1 ch 1c cc c1 u 4 properties chemical formula c 20 h 20 u appearance red crystals except where otherwise noted data are given for materials in their standard state at 25 c 77 f 100 kpa n what is y n infobox references chemical compound tetrakis cyclopentadienyl uranium iv u c 5 h 5 4 abbreviated u cp 4 is an organouranium compound composed of a uranium atom sandwiched between four cyclopentadienide rings synthesis and properties edit tetrakis cyclopentadienyl uranium iv was first prepared in 1962 by ernst otto fischer who reacted uranium tetrachloride with excess potassium cyclopentadienide in benzene and obtained the complex as red crystals at 6 yield 1 2 ucl 4 4 kcp u cp 4 4 kcl solid crystals of u cp 4 are air stable but the benzene solution is extremely air sensitive reduction of u cp 4 with uranium metal yields tris cyclopentadienyl uranium iii u cp 3 1 references edit 1 2 seyferth dietmar 2004 07 01 uranocene the first member of a new class of organometallic derivatives of the f elements organometallics 23 15 3562 3583 doi 10 1021 om0400705 issn 0276 7333 fischer ernst otto hristidu yani 1962 04 01 notizen über aromatenkomplexe von metallen lvii uran tetracyclopentadienyl zeitschrift für naturforschung b 17 4 275 276 doi 10 1515 znb 1962 0410 issn 1865 7117 s2cid 105017911 external links edit media related to tetrakis cyclopentadienyl uranium iv at wikimedia commons v t e uranium compounds u ii ub 2 us u iii uf 3 ucl 3 ubr 3 ui 3 up u oh 3 uh 3 un organouranium iii compounds u c 5 h 5 3 u iv u bh 4 4 uc ucl 4 uf 4 nh 4 2 uf 6 ubr 4 ui 4 uo 2 u oh 4 uh 4 usi 2 us 2 use 2 ute 2 u so 4 2 organouranium iv compounds u c 8 h 8 2 u c 5 h 5 4 u c 5 h 5 3 cl u iv v u 2 n 3 u 4 o 9 u 3 o 7 u v ucl 5 uf 5 ubr 5 ui 5 u 2 o 5 u v vi u 3 o 8 u vi nh 4 2 u 2 o 7 na 2 u 2 o 7 mgu 2 o 7 ucl 6 uf 6 uo 3 un 2 uranyl compounds na 4 uo 2 co 3 3 u 2 o 7 uo 4 uo 2 ch 3 coo 2 uo 2 cho 2 2 uo 2 co 3 uo 2 c 2 o 4 uo 2 co 3 2 nh 4 2 co 3 uo 2 br 2 uo 2 cl 2 uo 2 f 2 uo 2 i 2 uo 2 no 3 2 uo 2 oh 2 uo 2 2 oh 4 uo 2 po 3 2 uo 2 clo 4 2 uo 2 so 4 2 znuo 2 ch 3 coo 4 u xii uo 6 hypothetical v t e salts and covalent derivatives of the cyclopentadienide ion cph he licp becp 2 b cpme n c 5 h 4 o f ne nacp mgcp 2 mgcpbr al me 3 sicp p s cl ar k cacp 2 sccp 3 ticp 2 cl 2 ticp 2 cl 2 ticpcl 3 ticp 2 s 5 ticp 2 co 2 ticp 2 me 2 vcp 2 vcpch vcp 2 cl 2 vcp co 4 crcp 2 crcp co 3 2 mncp 2 fecp 2 fe η 5 c 5 h 4 li 2 c 5 h 5 fe c 5 h 4 2 c 5 h 4 c 5 h 4 2 fe 2 fecp 2 pf 6 fecp co 2 i cocp 2 cocp co 2 nicp 2 nicpno cucppet 3 zn ga ge as se br kr rb sr y c 5 h 5 3 zrcp 2 cl 2 zrcp 2 clh nbcp 2 cl 2 mocp 2 h 2 mocp 2 cl 2 mocp co 3 2 tc rucp 2 rucp pph 3 2 cl rucp mecn 3 pf 6 rhcp 2 pdcp c 3 h 5 ag cd incp sncp 2 sb te i xe cs ba lucp 3 hfcp 2 cl 2 ta wcp co 3 2 recp 2 h oscp 2 ircp 2 pt au hg tlcp pbcp 2 bi po at rn fr ra lr rf db sg bh hscp 2 mt ds rg cn nh fl mc lv ts og lacp 3 cecp 3 prcp 3 ndcp 3 pmcp 3 smcp 3 eu gd tb dycp 3 ho ercp 3 tmcp 3 ybcp 3 ac thcp 3 thcp 4 pa ucp 4 np pu am cm bk cf es fm md no retrieved from https en wikipedia org w index php title tetrakis cyclopentadienyl uranium iv oldid 1358723522 categories organouranium compounds metallocenes cyclopentadienyl complexes uranium iv compounds substances discovered in the 1960s hidden categories articles with short description short description is different from wikidata articles without inchi source articles without ebi source articles without kegg source articles without unii source articles with changed chemspider identifier articles containing unverified chemical infoboxes commons category link from wikidata this page was last edited on 10 june 2026 at 14 49 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 tetrakis cyclopentadienyl uranium iv 2 languages add topic