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Neptunocene

Neptunocene
Neptunocene-from-xtal-3D-balls.png
Names
IUPAC name
Bis(η8-cyclooctatetraenyl)neptunium(IV)
Other names
Neptunium cyclooctatetraenide
Np(COT)2
Identifiers
3D model (JSmol)
Properties
C16H16Np
Molar mass 445 g·mol−1
Hazards
Main hazards Ignites in air
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Neptunocene, Np(C8H8)2, is an organoneptunium compound composed of a neptunium atom sandwiched between two cyclooctatetraenide rings. It was one of the first organoneptunium compounds to be synthesized. Neptunocene, a member of the "actinocenes," a group of metallocenes incorporating elements from the actinide series.

Property and synthesis

It was synthesized in 1970 by reacting neptunium(IV) chloride with dipotassium cyclooctatetraenide (K2(C8H8). It is isomorphous to uranocene and plutonocene, and they behave chemically identically. All three compounds are insensitive to water or dilute bases, but are sensitive to air, reacting quickly to form oxides, and are only slightly soluble in benzene and toluene.[1]

References

  1. ^ Yoshida, Zenko; Johnson, Stephen G.; Kimura, Takaumi; Krsul, John R. (2006). "Neptunium". In Morss, Lester R.; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (PDF). 3 (3rd ed.). Dordrecht, the Netherlands: Springer. pp. 699–812. doi:10.1007/1-4020-3598-5_6.