| Abstract | The infrared spectrum of the cross-shaped van der Waals complex N₂O – CS₂ is observed in the region of the N₂Oν₁ fundamental band (≈2220 cm⁻¹) using a tuneable diode laser to probe a pulsed supersonic slit jet expansion. Both ¹⁴N- and ¹⁵N-substituted species are studied. Analysis of their spectra establishes that this dimer has a cross-shaped structure, similar to its isoelectronic cousin CO₂ – CS₂. This is the first spectroscopic observation of N₂O-CS₂, and the molecular parameters determined here should be useful for detection of its pure rotational microwave spectrum. |
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