Keywords: Excited aldehydes.png Scale diagram of the excitation energies of but-2-enal and related aldehydes with between 1 and 7 C C- conjugated bonds Data from Streitwieser A Heathcock CH 1985 Introduction to organic chemistry 3rd ed p 628 Macmillan New York n Wavelength nm 1 220 2 270 3 312 4 343 5 370 6 393 7 415 2006-09-14 own assumed Ewen Aldehydes |