Infrared Spectrum of15N13C13C15N near 2100 cm-1 pp. 126-130 (doi:10.1006/jmsp.1997.7489) Wolfgang Quapp*, Arthur Maki, Stefan Klee, Georg Mellau *Mathematisches Institut, Universität Leipzig, Augustus-Platz 10-11, D-04109, Leipzig, Germany 15012 24 Avenue S.E., Mill Creek, Washington, 98012-5718 Physikalisch-Chemisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 58, D-35392, Gießen, Germany The high resolution infrared spectrum of the linear centro-symmetric molecule 13C215N2 (cyanogen) has been measured in the region from 1950 to 2150 cm-1. The nu_3 fundamental band and the difference band nu_1- nu_5 were observed in that region. Hot-band transitions arising from the nu_5, 2 nu_5, 3 nu_5, and nu_4 levels were also measured with the nu_3 band. The nu_3 fundamental band and first hot band for 15N12C13C15N were also measured. Copyright 1998 Academic Press.