Kinetics of thermal decomposition and of the reaction with oxygen, ethene and 1-octene of first generation Grubbs' catalyst precursor

Hendrik J. Van Der Westhuizen; Andreas Roodt; Reinout Meijboom

doi:10.1016/j.poly.2010.06.026

Kinetics of thermal decomposition and of the reaction with oxygen, ethene and 1-octene of first generation Grubbs' catalyst precursor

Hendrik J. Van Der Westhuizen, Andreas Roodt, Reinout Meijboom

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The stability of the first generation Grubbs' catalyst precursor, [Ru(CHPh)Cl₂(PCy₃)₂], was investigated using thermal decomposition of the catalyst precursor. The reactivity towards O ₂ as well as initiation of the catalyst precursor with ethene and 1-octene were also investigated. The thermal decomposition reaction was found to be a two reaction sequence with rate constants of 3.2(1) × 10 ^-4 and 1.06(2) × 10^-5 s^-1 for the first and second reaction respectively at 53 °C. The reaction of [Ru(CHPh)Cl ₂(PCy₃)₂] with O₂ was determined to be faster with a rate constant of 4.6(1) × 10^-3 M^-1 s^-1 at 25 °C. It was found that the rate constants of decomposition of Grubbs' catalyst precursor and the reaction with O₂ are low compared to the rate constants of reaction with ethene and 1-octene, which were found to be 4.7(5) × 10^-2 and 3.46(6) × 10^-2 s^-1 respectively at 25 °C.

Original language	English
Pages (from-to)	2776-2779
Number of pages	4
Journal	Polyhedron
Volume	29
Issue number	14
DOIs	https://doi.org/10.1016/j.poly.2010.06.026
Publication status	Published - 22 Sept 2010

Keywords

Kinetics
Metathesis
Ruthenium

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.poly.2010.06.026

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title = "Kinetics of thermal decomposition and of the reaction with oxygen, ethene and 1-octene of first generation Grubbs' catalyst precursor",

abstract = "The stability of the first generation Grubbs' catalyst precursor, [Ru(CHPh)Cl2(PCy3)2], was investigated using thermal decomposition of the catalyst precursor. The reactivity towards O 2 as well as initiation of the catalyst precursor with ethene and 1-octene were also investigated. The thermal decomposition reaction was found to be a two reaction sequence with rate constants of 3.2(1) × 10 -4 and 1.06(2) × 10-5 s-1 for the first and second reaction respectively at 53 °C. The reaction of [Ru(CHPh)Cl 2(PCy3)2] with O2 was determined to be faster with a rate constant of 4.6(1) × 10-3 M-1 s-1 at 25 °C. It was found that the rate constants of decomposition of Grubbs' catalyst precursor and the reaction with O2 are low compared to the rate constants of reaction with ethene and 1-octene, which were found to be 4.7(5) × 10-2 and 3.46(6) × 10-2 s-1 respectively at 25 °C.",

keywords = "Kinetics, Metathesis, Ruthenium",

author = "{Van Der Westhuizen}, {Hendrik J.} and Andreas Roodt and Reinout Meijboom",

year = "2010",

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doi = "10.1016/j.poly.2010.06.026",

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T1 - Kinetics of thermal decomposition and of the reaction with oxygen, ethene and 1-octene of first generation Grubbs' catalyst precursor

AU - Van Der Westhuizen, Hendrik J.

AU - Roodt, Andreas

AU - Meijboom, Reinout

PY - 2010/9/22

Y1 - 2010/9/22

N2 - The stability of the first generation Grubbs' catalyst precursor, [Ru(CHPh)Cl2(PCy3)2], was investigated using thermal decomposition of the catalyst precursor. The reactivity towards O 2 as well as initiation of the catalyst precursor with ethene and 1-octene were also investigated. The thermal decomposition reaction was found to be a two reaction sequence with rate constants of 3.2(1) × 10 -4 and 1.06(2) × 10-5 s-1 for the first and second reaction respectively at 53 °C. The reaction of [Ru(CHPh)Cl 2(PCy3)2] with O2 was determined to be faster with a rate constant of 4.6(1) × 10-3 M-1 s-1 at 25 °C. It was found that the rate constants of decomposition of Grubbs' catalyst precursor and the reaction with O2 are low compared to the rate constants of reaction with ethene and 1-octene, which were found to be 4.7(5) × 10-2 and 3.46(6) × 10-2 s-1 respectively at 25 °C.

AB - The stability of the first generation Grubbs' catalyst precursor, [Ru(CHPh)Cl2(PCy3)2], was investigated using thermal decomposition of the catalyst precursor. The reactivity towards O 2 as well as initiation of the catalyst precursor with ethene and 1-octene were also investigated. The thermal decomposition reaction was found to be a two reaction sequence with rate constants of 3.2(1) × 10 -4 and 1.06(2) × 10-5 s-1 for the first and second reaction respectively at 53 °C. The reaction of [Ru(CHPh)Cl 2(PCy3)2] with O2 was determined to be faster with a rate constant of 4.6(1) × 10-3 M-1 s-1 at 25 °C. It was found that the rate constants of decomposition of Grubbs' catalyst precursor and the reaction with O2 are low compared to the rate constants of reaction with ethene and 1-octene, which were found to be 4.7(5) × 10-2 and 3.46(6) × 10-2 s-1 respectively at 25 °C.

KW - Kinetics

KW - Metathesis

KW - Ruthenium

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U2 - 10.1016/j.poly.2010.06.026

DO - 10.1016/j.poly.2010.06.026

M3 - Article

AN - SCOPUS:77956181778

SN - 0277-5387

VL - 29

SP - 2776

EP - 2779

JO - Polyhedron

JF - Polyhedron

IS - 14

ER -

Kinetics of thermal decomposition and of the reaction with oxygen, ethene and 1-octene of first generation Grubbs' catalyst precursor

Abstract

Keywords

ASJC Scopus subject areas

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