کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
61556 | 47588 | 2011 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Probing elementary steps of nickel-mediated bond activation in gas-phase reactions: Ligand- and cluster-size effects Probing elementary steps of nickel-mediated bond activation in gas-phase reactions: Ligand- and cluster-size effects](/preview/png/61556.png)
Mass-spectrometry-based experiments, complemented by computational studies, are presented which demonstrate the richness of nickel-containing reagents when employed in various bond-activation processes and conducted under single-collision conditions. We will address the chemistry of “naked” atomic Ni+, the dramatic effects of ligands L or of the size of clusters, which they exhibit in thermal reactions of NiL+ or Nin+ (n = 2–30). Special emphasis will be paid to identify elementary steps and to uncover mechanistic principles; as an example, various aspects of the face-selective dehydrogenation of cyclohexane by homo- and heteronuclear cluster-ion dimers are discussed in some detail for the first time.
With a little help from my friends: While “naked” Ni+ is reluctant to bring about bond activation of small inert molecules, ligated species as well as nickel-containing dimeric clusters NiM+ can activate methane and ethane, respectively. A summary of nickel chemistry in the gas phase is presented which is not only characterized by a remarkable reactivity that can be tuned by ligands over a broad scope, but also by a large diversity with respect to the reaction mechanisms observed for the individual gaseous nickel species.Figure optionsDownload high-quality image (93 K)Download as PowerPoint slideHighlights
► Generation and reactivity of nickel species in the gas phase.
► Reactivity of gaseous nickel complexes tuned by ligands over a broad scope.
► A plethora of different reaction mechanisms observed for gaseous nickel species.
Journal: Journal of Catalysis - Volume 284, Issue 2, 1 December 2011, Pages 126–137