ChemInform Abstract: The Characterization of Molecular Boric Acid by Mass Spectrometry and Matrix Isolation IR Spectroscopy.

Molecular H₃BO₃ is obtained by heating crystalline orthoboric acid in vacuo to ∼ 40 °C. The IR spectrum of this species isolated in low-temp.     

ChemInform Abstract: Dimers and Tetramers of SiCl in a Molecular Beam from a Heterogeneous,Intermediate-Pressure Reactor.

Unusual molecules like Si₂Cl₂ and Si₄Cl₄ can be detected by mass spectrometry in a molecular beam extracted from a promising new type of source.     

ChemInform Abstract: Spectroscopic and Electrochemical Characterization of 18-Molybdodisulfate(VI)(4-), S2Mo18O4- 62.

The chemical and physicochemical properties of the yellow Dawson-type molybdosulfate anion S₂Mo₁₈O₆^4-2 in solution are investigated, regarding to the optimum formation conditions, UV-VIS characteristics, and electrochemical behavior.     

ChemInform Abstract: Direct Observation of New Antimony-containing Anions: SbH2O-, Sb3-, and Monomeric Sb3O5-.

The novel title anions are generated in the source of a mass spectrometer under negative chemical ionization conditions Starting from Sb(OBu)₃.     

ChemInform Abstract: Thermolysis of NH4HCO3: A Simple Way to Free Carbonic Acid,H2CO3, in the Gas Phase.

Mass spectrometric results indicate that thermolysis of NH₄HCO₃ results in the formation of the radical cation CH₂O+· 3 (I), (m/z 62).     

ChemInform Abstract: Quantum Molecular Interpretation of Photodetachment and Photodepletion Spectra of Small Alkali Metal Clusters.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Matrix Isolation and Mass Spectrometric Studies on Selenium Trioxide Vapour: The Characterisation of Monomeric SeO3.

(SeO₃)₄ is shown to be the major species in the vapour above heated selenium trioxide, while above mixtures of H2SeO4/P2O5 significant portions of monomeric SeO₃ are observed.     

ChemInform Abstract: A Fully Size-Resolved Perspective on the Crystallization of Water Clusters.

Precisely size-selected (H₂O)_n clusters (n = 85—457) are characterized by IR spectroscopy.     

Cesium sorption on mylonite

As part of the laboratory support program for the field migration experiment at the Grimsel Test Site (GTS) in the Swiss Alps, the sorption behaviour of cesium on Grimsel mylonite was studied. Batch sorption experiments were carried out in N₂ atmosphere (<3 ppm O₂). The adsorption isotherms were reversible and non-linear for cesium concentrations of between 3.2·10^–8 and 5.0·10^–4M. Two different sites appear to be involved in sorption depending on whether Cs loading was high (10^–6–10^–3 meq/g) or low (10^–7–10^–6 meq/g). At low Cs loadings adsorption was considered to occur mainly at the crystal edges of mica particles. Selectivity coefficients for exchange between cesium and potassium were calculated for different Cs loadings. It was suggestd that by varying the potassium concentration of the solution and by making some assumptions, a K_d value for cesium at the migration site could be estimated. Data were fitted to both Freundlich and Dubinin-Radushkevich isotherms. The empirical Freundlich parameters enabled a site distribution function to be calculated and a mean energy of sorption of about 12 kJ/mol was found using Dubinin-Radushkevich isotherms approach.     

ChemInform Abstract: Vibrational Spectroscopy of the Hydrated Hydronium Cluster Ions H3O+·(H2O)n (n = 1, 2, 3).

Using a new spectroscopic method, the gas phase IR spectra of the title cluster ions, produced in a high pressure corona discharge source, are observed between 3550 and 3800 cm^-1.     

ChemInform Abstract: High-Pressure Studies of Transition-Metal Complexes. Part 1. Induced Torsional Deformation in Re2Cl2- 8.

The pressure dependence of the electronic absorption and Raman spectra of a solution of (Bu₄N)₂Re₂Cl₈ in CH₂Cl₂ has been investigated.     

ChemInform Abstract: Polychloride Monoanions from [Cl3]‐ to [Cl9]‐: A Raman Spectroscopic and Quantum Chemical Investigation.

Polychloride monoanions [Cl_n]^‐ (n = 3, 5, 7, 9) stabilized by quaternary ammonium salts are obtained through the addition or condensation of an excess of dry chlorine to [NMe₄]Cl, [NEt₄]Cl, [NPr₄]Cl, or [NBu₄]Cl and characterized by Raman spectroscopy and state‐of‐the‐art quantum chemical calculations up to the CCSD(T) level.     

ChemInform Abstract: FTIR Spectra of Hydroxylamine-Hydrogen Fluoride Complexes in Solid Argon.

Codeposition of HF and NH₂OH in excess argon at 12 K produces new IR absorption bands corresponding to perturbed acid and base submolecule vibrations for a 1:1 complex.     

ChemInform Abstract: Experimental Detection of Tetranitrogen.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Experimental Evidence for the Existence of Neutral P6: A New Allotrope of Phosphorus.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.