Matrix-isolation studies on the vaporisation of arsenic(V) oxide: the characterisation of molecular species As4On(n= 7–10) by infrared spectroscopy
The vapour species produced on heating arsenic(V) oxide in vacuo have been isolated in low-temperature matrices, and examined by i.r. spectroscopy. Detailed studies reveal the existence of As4O6 and four higher oxides As4O7, As4O8, As4O9, and As4O10 which are characterised for the first time as stable molecular entities. Band assignments are proposed for several of the more intense absorptions, and the effects of 18O enrichment in the terminal AsO stretching region are interpreted on the basis of a restricted force-field analysis.