The photodissociation of cis-(NO)2 in N2 and Ar matrices under 266 nm pulsed laser irradiation is reported- Results show the electronically excited o(1D) atom may be formed in the primary photolysis step. In the N2 matrix, the highly active o(1D) atoms could either react with N2 lattice molecules forming N2O or recombine with nearby N2O forming cis-(NO)2 and trans-(NO)2. However, in the Ar matrix the nascent state o(1D) atom, due to the lack of reactant, quenches to O(3P) as moving through the lattice site and the yield of N2O is less than that in N2 matrix.
nm pulsed laser\|ablated Ta atoms react with carbon dioxide to form products TaCO, OTaCO and O\-2Ta(CO)\-2, which have been isolated in argon matrices and identified by their FTIR spectra and a comparison of the spectra of O\-\%x\%W(CO)\-\%y\%. Annealing of matrix isolated sample results in the growth of OTaCO and O\-2Ta(CO)\-2, and further 266 nm laser irradiation leads to the increase of OTaCO as well as the formation of O\-2TaCO.
The geometries and fundamental vibrational frequencies of trans-and C2v- nitrous acid have been determined by ab initio calculations at the MP2 level with 6-31G** and 6-311+G** basis sets. The calculation results satisfactorily reproduce the experimental structural and vibrational spectral features of trans-HONO. Calculations at the same levels indicate that the C2v-HNO2 is also a stable conformer of nifrous acid. The calculated frequencies of C2.-HNO2 are in good agree-ment with the matrir infrared spectral features.
