# Promethocene

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Promethocene
> Markdown URL: https://mediated.wiki/source/Promethocene.md
> Source: https://en.wikipedia.org/wiki/Promethocene
> Source revision: 1299055141
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

Promethocene Names Other names Promethium cyclopentadienide Identifiers CAS Number 112341-23-8 Y 3D model (JSmol) Interactive image InChI InChI=1S/3C5H5.Pm/c3*1-2-4-5-3-1;/h3*1-5H;/q3*-1;+3 N Key: SKRISUXFUFKQSA-UHFFFAOYSA-N N SMILES c1ccc[cH-]1.c2ccc[cH-]2.c3ccc[cH-]3.[Pm+3] Properties Chemical formula Pm(C5H5)3 Molar mass 340.285 Appearance yellow-orange solid[1] Boiling point 145~260 °C (10−3~10−4mmHg, sublimates) Related compounds Related compounds cyclopentadiene Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

**Promethocene** is a metal-organic compound of promethium with the chemical formula Pm(C5H5)3. It is radioactive and stable in dry air. Promethocene is different from cyclopentadiene complexes of general transition metals and is considered to be ionically bonded.[1] Theoretical calculations show that its Pm natural population analysis (NPA) electronic configuration is 6s0.115d1.194f2.21.[2]

## Preparation

Promethocene can be obtained by reacting anhydrous [promethium(III) chloride](/source/Promethium(III)_chloride) and [sodium cyclopentadienide](/source/Sodium_cyclopentadienide) in a [tetrahydrofuran](/source/Tetrahydrofuran) medium:[1]

- 3C5H5Na + PmCl3 → (C5H5)3Pm + 3 NaCl

## Chemical properties

Promethocene decomposes when exposed to water to produce [promethium(III) hydroxide](/source/Promethium(III)_hydroxide) and [cyclopentadiene](/source/Cyclopentadiene).

## References

1. ^ [***a***](#cite_ref-wj_1-0) [***b***](#cite_ref-wj_1-1) [***c***](#cite_ref-wj_1-2) 《无机化学丛书》. 第七卷 钪 稀土元素. 易宪武 等主编. 科学出版社. 2.3.7 稀土元素有机化合物. P260~261. 1.π络合物

1. **[^](#cite_ref-2)** Krinsky, Jamin L.; Minasian, Stefan G.; Arnold, John (2010-12-08). "Covalent Lanthanide Chemistry Near the Limit of Weak Bonding: Observation of (CpSiMe3)3Ce−ECp* and a Comprehensive Density Functional Theory Analysis of Cp3Ln−ECp (E = Al, Ga)". *Inorganic Chemistry*. **50** (1). American Chemical Society (ACS): 345–357. [doi](/source/Doi_(identifier)):[10.1021/ic102028d](https://doi.org/10.1021%2Fic102028d). [ISSN](/source/ISSN_(identifier)) [0020-1669](https://search.worldcat.org/issn/0020-1669).

v t e Promethium compounds PmF3 PmCl3 PmBr3 PmI3 Pm(IO3)3 Pm2O3 Pm2(SO4)3 PmS Pm(OH)3 Pm(NO3)3 Pm2(C2O4)3 PmPO4 Pm2S3 Pm(C5H5)3 PmN

v t e Salts and covalent derivatives of the cyclopentadienide ion CpH He LiCp BeCp2 B CpMe N C5H4O F Ne NaCp MgCp2 MgCpBr Al Me3SiCp P S Cl Ar K CaCp2 ScCp3 TiCp2Cl2 (TiCp2Cl)2 TiCpCl3 TiCp2S5 TiCp2(CO)2 TiCp2Me2 VCp2 VCpCh VCp2Cl2 VCp(CO)4 CrCp2 (CrCp(CO)3)2 MnCp2 FeCp2 Fe(η5-C5H4Li)2 ((C5H5)Fe(C5H4))2 (C5H4-C5H4)2Fe2 FeCp2PF6 FeCp(CO)2I CoCp2 CoCp(CO)2 NiCp2 NiCpNO CuCpPEt3 Zn Ga Ge As Se Br Kr Rb Sr Y(C5H5)3 ZrCp2Cl2 ZrCp2ClH NbCp2Cl2 MoCp2H2 MoCp2Cl2 (MoCp(CO)3)2 Tc RuCp2 RuCp(PPh3)2Cl RuCp(MeCN)3PF6 RhCp2 PdCp(C3H5) Ag Cd InCp SnCp2 Sb Te I Xe Cs Ba * LuCp3 HfCp2Cl2 Ta (WCp(CO)3)2 ReCp2H OsCp2 IrCp2 Pt Au Hg TlCp PbCp2 Bi Po At Rn Fr Ra ** Lr Rf Db Sg Bh HsCp2 Mt Ds Rg Cn Nh Fl Mc Lv Ts Og * LaCp3 CeCp3 PrCp3 NdCp3 PmCp3 SmCp3 Eu Gd Tb DyCp3 Ho ErCp3 TmCp3 YbCp3 ** Ac ThCp3 ThCp4 Pa UCp4 Np Pu Am Cm Bk Cf Es Fm Md No

---
Adapted from the Wikipedia article [Promethocene](https://en.wikipedia.org/wiki/Promethocene) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Promethocene?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.