Tetrakis(cyclopentadienyl)uranium(IV)

Tetrakis(cyclopentadienyl)uranium(IV)
Names
	IUPAC name Tetrakis(η5-cyclopentadienyl)uranium(IV)
	Other names Tetracyclopentadienyluranium; U(Cp)4
Identifiers
CAS Number	1298-76-6 ;
Properties
Chemical formula	C20H20U
Appearance	red crystals
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Tetrakis(cyclopentadienyl)uranium(IV), U(C₅H₅)₄, abbreviated U(Cp)₄, is an organouranium compound composed of a uranium atom sandwiched between four cyclopentadienide rings.

Synthesis and properties

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]

UCl₄ + 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]

gollark: So it's probably possible to make something which runs self-sustainingly somehow.

gollark: I'm told that you can use starlight/lava interactions to produce aquamarine shale.

gollark: Oh. Well, they require input to make starlight.

gollark: They don't run forever on one input. This is IN THE MANUAL. You can also use rock crystals and celestial crystals and such.

gollark: Yes?

References

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.

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[Seyferth2004-1] 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.

[2] 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.