Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Reexamination Certificate
2005-04-26
2005-04-26
Nazario-Gonzalez, Porfirio (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
C556S143000, C427S587000, C427S593000
Reexamination Certificate
active
06884901
ABSTRACT:
A method for producing Group 8 (VIII) metallocene or metallocene-like compounds employs a compound that includes a Cp′ anion, such as found, together with a counterion, in a cyclopentadienide or cyclopentadienide-like salt. In one embodiment, the method includes reacting a metal salt, a (Cp) compound, such as a substituted or unsubstituted cyclopentadiene or indene, and a ligand (L) to form an intermediate compound and reacting the intermediate compound with a Cp′ compound, eg., a cyclopentadienide or cyclopentadienide-like salt, where the metal salt can be is a ruthenium, an osmium or an iron halide or nitrate and L is an electron pair donor. Unsubstituted, mono-substituted as well as symmetrically or asymmetrically di- or multi-substituted metallocenes or metallocene-like compounds can be produced. In another embodiment, unsubstituted or symmetrically substituted metallocenes are formed by reacting MX2(PPh3)mwith a Cp′ compound, where m=3 or 4. The method can be used to form precursors for chemical vapor deposition of thin films.
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Hoover Cynthia A.
Thompson David M.
Coon Gerald L.
Nazario-Gonzalez Porfirio
Praxair Technology Inc.
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