Neptunocene

Neptunocene

Names
IUPAC name Bis(η8-cyclooctatetraenyl)neptunium(IV)
Other names Neptunium cyclooctatetraenide Np(COT)2
Identifiers
Jmol 3D model	Interactive image
SMILES [Np].[CH-]1[CH-][CH-][CH-][CH-][CH-][CH-][CH-]1.[CH-]1[CH-][CH-][CH-][CH-][CH-][CH-][CH-]1
Properties
Chemical formula	C16H16Np
Vapor pressure	{{{value}}}
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 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.