While the job of a research scientist varies, most chemistry careers in research are based in laboratories, where research is conducted by teams following scientific methods and standards. SDS of cas: 108-47-4, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. In an article，Which mentioned a new discovery about 108-47-4
The 13C-NMR spectrum of {[NON]Zr(13CH3)(S)}+ (S=bromobenzene-d5) after addition of one equivalent of 1-hexene reveals resonances at 30.8 ppm for the terminal 13CH3 group in the first insertion product, at 24.0 ppm for the terminal 13CH3 group in the second insertion product and near 20 ppm for the terminal 13CH3 group in higher insertion products. The latter are consistent with ‘insertion’ of the 1-hexene into the Zr-CH3 bond in a 1,2 manner. Addition of ten equivalents of 1-nonene to {[NON]Zr(CH3)(S)}+ followed by one equivalent of 13CH2=CHC7H15 led to a 13C-NMR spectrum consistent with formation of {[NON]Zr[13CH2CH(C7H 15)(Polymer)](S)}+, which confirms that 1-nonene ‘inserts’ into the Zr-C bond primarily in a 1,2 fashion. A discussion as to why beta elimination is relatively slow in {[NON]Zr(R)(S)}+ systems that have been examined so far focuses on reversible addition of a terminal olefin only to the CNN face of the pseudo-tetrahedral cation, {[NON]Zr(R)}+, to yield a trigonal bipyramidal transition state. After the equatorial alkyl group migrates to the substituted carbon of the incoming olefin, the new bulky alkyl in {[NON]Zr(CH2CHPR?)}+ cannot ‘back up’ toward the two t-butyl groups in preparation for beta elimination relative to the rate at which {[NON]Zr(CH2CHPR?)}+ reacts with either base or more olefin.
Future efforts will undeniably focus on the diversification of the new catalytic transformations. These may comprise an expansion of the substrate scope from aromatic and heteroaromatic compounds to other hydrocarbons. SDS of cas: 108-47-4, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 108-47-4, in my other articles.
Reference：
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis