@article{7134, author = {J. M. Bakker and J . Y. Salpin and P. Maitre}, title = {Tautomerism of cytosine probed by gas phase IR spectroscopy}, abstract = {The tautomerism of the gaseous protonated cytosine is studied using infrared multiple photon dissociation (IRMPD) spectroscopy of singly hydrated complexes of protonated cytosine in the 2700-3750 cm(-1) wavenumber range. The hydrated complexes are formed through argon-mediated collisions between bare electrosprayed cytosine and low-pressure water vapor. In the spectra, where X-H (X=C, O, and N) stretching vibrations are probed, evidence is found for the coexistence in the gas phase of hydrated complexes of two different cytosine tautomers. As the addition of a water molecule to either tautomer of protonated cytosine is energetically highly unlikely to induce interconversion, it is deduced that both C(2)=O and N(3) protonated tautomers of cytosine are formed under electrospray conditions. (C) 2009 Elsevier B.V. All rights reserved.}, year = {2009}, journal = {International Journal of Mass Spectrometry}, volume = {283}, number = {1-3}, pages = {214-221}, month = {Jun}, isbn = {1387-3806}, url = {://000266808800029 }, note = {ISI Document Delivery No.: 455ZYTimes Cited: 0Cited Reference Count: 35Sp. Iss. SI}, language = {English}, }