... Errata: FTIR Spectroscopic and Theoretical Study of the Photochemistry of Matrix-isolated Coumarin Volume 83, Issue 6, 1541 ... 311++G(d,p), MP2/6-31G(d,p) and MP2/6-311++G(d,p) levels. ... As early as in the mid-1930s, Späth and coworkers carried out an extensive study on the ...