Articles you may be interested inPressure dependence and metastable state formation in the photolysis of dichlorine monoxide (Cl2O)In situ photolysis of matrix-isolated dichlorine monoxide, CbO, at 20 o K, produced eight bands near 960 cm-1 and a quartet near 375 cm-I • Growth plots for the high-frequency features during photolysis show that three distinct molecules are produced. Oxygen and chlorine isotopic shifts indicate that CICIO, with a structure like those of the nitrosyl halides, is most probably responsible for absorptions between 962 and 952 cm-I as well as for the 377-368-cm-1 quartet. In addition, bands at 982 and 945 cm-I are attributed to (CIOh, in which pairs of CIO molecules are weakly linked. Thus (CIOh resembles the nitric oxide dimer rather than H20 2 or 02F2. The observed frequencies indicate that the vibrational frequency of CIO itself is probably near 970 cm-I rather than 853 cm-I as deduced earlier from electronic spectra.

No abstract

Infrared studies of chlorine monoxide (16O and 18O) in the region 200–4000 cm−1 for both gas and condensed phases are presented. The spectra require reassignment of the stretching fundamentals and reveal the previously unknown bending fundamental. The new assignment (solid phase: v1=630.7, v2=296.4, v3=670.8 cm−1) results in a new value for the Cl–O bond stretching force constant, Kr=2.75 mdyn/Å, which is strikingly lower than values previously cited. The bond in chlorine monoxide is proposed as the prototype Cl–O single bond. The low stretching-force constant indicates little ionic character in the Cl–O bond, in disagreement with conclusions based on nuclear quadrupole coupling data.

A new method for the infrared analysis of multicomponent gas mixtures which involves a condensed phase sampling technique employing commercially available cryogenic equipment is described. Only a few micromoles of material are required for positive qualitative identification of most chemical species; hence, the method is sensitive and suitable for impurity analysis. The technique is very general in its applicability. Structurally similar molecules are readily differentiated, and molecules differing only in isotopic content may sometimes be distinguished. Molecules are characterized by a small number of well defined frequencies. The method permits analyses to be executed rapidly and is capable of creditable quantitative results. Herein spectral analyses are demonstrated for a series of 13 Ci-C4 hydrocarbons.

No abstract