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US 7,030,257 B2Granted
Metallocenes and processes for their preparation
AssigneeAgency for Science, Technology and Research
InventorsZhiqiang Gao, Fang Xie, Hong Xie
Life of this patent
Estimating the term…
Abstract
Disclosed herein are novel high oxidation state metallocene compounds, processes for preparing these compounds and uses of these compounds.
Claims19
A compound having the formula (I):
- wherein:
- M is a transition metal selected from Groups 4 to 10 (IUPAC, 1990);
- Ra is H or C1 to C6 alkyl, optionally substituted;
- y is an integer of 1 or 2;
- Rb is H, or a vinyl group having the formula (II):
- or the formula (IIA):
- or the formula (IIB):
- wherein Rc is H or C1 to C6 alkyl, optionally substituted;
- R1 and R2 are independently selected from C1 to C6 alkyl, optionally substituted;
- R3 and R4 are independently selected from H or C1 to C6 alkyl, optionally substituted;
- and
- n is an integer of 2 or 3.
9 more elements
A process for preparing an organometallic compound comprising:
- reacting a compound having the formula (III):
- with a compound having the formula (IV):
- wherein:
- M is a transition metal selected from Groups 4 to 10 (IUPAC, 1990);
- Ra is H or C1 to C6 alkyl, optionally substituted;
- Rb is H, or a vinyl group having the formula (II):
- or the formula (IIA):
- or the formula (IIB):
- wherein Rc is H or C1 to C6 alkyl, optionally substituted;
- R1 and R2 are independently C1 to C6 alkyl, optionally substituted,
- R3 and R4 are independently H or CH3, optionally substituted;
- and
- n is an integer of 2 or 3;
- said reaction being carried out in the presence of an oxidising agent.
11 more elements
Dependencies are inferred from the claim text.