nickelocenen.
/ˈnɪkələsiːn/, U.S. /ˈnɪkələˌsin/ Chemistry.
A green crystalline compound, Ni(C5H5)2, whose molecule consists of a nickel atom sandwiched between two cyclopentadienyl rings. Cf. ferrocene n.
ΚΠ
1959 Progress Inorg. Chem. 1 5 Similar trivial names are ruthenocene, osmocene, cobaltocene, nickelocene, etc.
1959 Progress Inorg. Chem. 1 23 The dipole moments of ferrocene and nickelocene are zero.
1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xxvii. 1358 Nickelocene, [NiII(η5-C5H5)2], is a bright green reactive solid, conveniently prepared by adding a solution of NiCl2 in dimethylsulfoxide to a solution of KC5H5 in 1,2-dimethoxyethane.
1998 New Scientist (Nexis) 3 Jan. 34 ‘Ferrocene has a rather spicy, lovely smell,’ says Turin. But nickelocene ‘smells of the carbon and hydrogen rings rather than anything else.’
This is a new entry (OED Third Edition, September 2003; most recently modified version published online March 2022).
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n.1959- wait like piffy
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