science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: methyl nitrite Other Names: nitrous acid, methyl ester Formula: CH3NO2; CH3ONO CAS-No.: 624-91-9 Study: UV absorption spectrum, photolysis Authors: F. Lahmani, C. Lardeux, D. Solgadi Title: Energy partitioning in molecular photodissociation: Methyl nitrite photolysis Journal/Source: Laser Chemistry, 3, 97-106, (1983) Data: diagram, table Energy/Wavelength range: 120 - 400 nm Resolution: Temperature: Temperature dependence: Pressure/Concentration: Phase: pH: Comments: The CH3ONO absorption spectrum presents from 4000 to 1200 A three well separated regions. Between 3000 and 4000/ the absorption arises from a n --> pi* transition and shows a vibrational structure broadened by predissociation and due to a progression in the N--O stretching mode. At shorter wavelength a more intense wide absorption band with a maximum at 215 nm is assigned to an intramolecular charge transfer from the lone pair pi orbital of the OCH3 group to the pi* orbital of the N--O group. In the vacuum ultraviolet the spectrum is composed of diffuse bands with a prominent peak at 1390 A. Author to whom correspondence should be addressed: (e-mail address):