Abstract

Matrix studies featuring the FTIR instrumental advantages of resolution and sensitivity for a finite amount of time are described. Ammonia clusters have a complicated spectrum in the N–H stretching region. One antisymmetric and two symmetric stretching modes in the dimer verify an asymmetric cyclic dimer structure.¹ Chlorine isotopic splittings have been resolved for the four H/D substituted (HC1)³ species, which confirm the cluster stoichiometry and triangular structure.² The ammonia/hydrogen cyanide system reveals 1:1 and 1:2 complexes, which are identified from their FTIR spectra and characterized by comparison to similar complexes.³ The ozone/hydrogen fluoride system gives the O₃–HF complex, and mixed oxygen isotopic spectra show inequivalent terminal oxygen atoms.⁴ The symmetrical PH₃–O₃ complex photolyzes to give an asymmetric HOPO₂ species based on mixed isotopic spectra.⁵

© 1989 Optical Society of America