Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/12911
Title: Steroselective homogeneous catalysis
Authors: KARL IRWIN KRUMMEL
Keywords: Stereoselective hydroformylation homogenous catalysis pharmaceuticals in-situ
Issue Date: 17-Nov-2008
Source: KARL IRWIN KRUMMEL (2008-11-17). Steroselective homogeneous catalysis. ScholarBank@NUS Repository.
Abstract: Stereoselective homogeneous catalysis is present in many products used on a daily basis. Stereoselective hydroformylation presents a one-step means of converting simple olefins into pharamaceutical intermediates. Despite this, little is known about the occurrences that happen inside the autoclave. In situ FTIR spectroscopy coupled with chemometrics and chiral GC, were carried out in this study to address this issue as it applies to stereoselective hydroformylation of styrene by Rh4(CO)12 and (S)-BINAP. Turnover frequencies were evaluated on the basis of the dominant organometallic species present, and the effects of all variables were explored.Generation of this species with the standard metal precursor is an important issue. However, little is known about the chemistry between diphosphines and Rh4(CO)12. NMR studies were undertaken to elucidate the initial steps of attack of (S)-BINAP, as well as several bis(diphenylphosphino)alkanes, on the Rh4(CO)12 cluster.
URI: http://scholarbank.nus.edu.sg/handle/10635/12911
Appears in Collections:Ph.D Theses (Open)

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