Showing papers in "Chemical Society Reviews in 1992"
525 citations
359 citations
261 citations
212 citations
TL;DR: Results of an experimental investigation on the pairing properties of alternative nucleic acid systems — including those of pyranosyl-RNA (‘p-RNA’), a constitutional isomer of RNA — are summarized.
Abstract: A relationship between what might be called a kinetic version of Le Chatelier's principle and chemical self-organization is considered. Some aspects of the search for a pre-RNA genetic system are discussed. Results of an experimental investigation on the pairing properties of alternative nucleic acid systems — including those of pyranosyl-RNA (‘p-RNA’), a constitutional isomer of RNA — are summarized.
206 citations
170 citations
146 citations
116 citations
91 citations
TL;DR: In this article, the appearance of certain magic numbers can be attributed to unique cluster reactions occurring between the ion and the solvating molecules within the cluster, which typically result from a particularly stable cluster ion geometry generated by the completion of a full solvent shell around a central ion core.
Abstract: : When neutral van der Waals clusters, produced in a supersonic expansion, are ionized the resulting cluster ion distribution can exhibit dramatic intensity anomalies for very specific cluster sizes. These 'magic numbers' typically result from a particularly stable cluster ion geometry generated by the completion of a full solvent shell around a central ion core. In this paper we will review our current work which employs magic numbers as a probe, not only of cluster ion structure, but also of chemical reactivity within these species. That is, the appearance of certain magic numbers can be attributed to unique cluster reactions occurring between the ion and the solvating molecules within the cluster.
TL;DR: A survey of the theoretical procedures currently being developed to determine the vibration-rotation spectra of small polyatomic molecules to the highest possible accuracy is presented in this paper, where the application of these new computational methods is illustrated by specific reference to the ion H-3+, the van der Waals complex Ar-N2, and the isomerization LiCN.
Abstract: A survey is presented of the theoretical procedures currently being developed to determine the vibration-rotation spectra of small polyatomic molecules to the highest possible accuracy. The application of these new computational methods is illustrated by specific reference to the ion H-3+, the van der Waals complex Ar-N2, and the isomerization LiCN. The importance of accurate theories for a better understanding of astronomical and atmospheric spectroscopic opacities and associated phenomena is also discussed.