Theoretical studies of the unimolecular and bimolecular tautomerization of cytosineElectronic supplementary information (ESI) available: tables of MP2(full)/6-31G* optimized geometries, rotational constants, and scaled vibrational frequencies for isolated monomers of the six low-energy tautomers of cytosine and corresponding transition states for unimolecular tautomerization; B3LYP/6-31G* optimized geometries, rotational constants, and scaled vibrational frequencies for six cytosine dimers and corresponding transition states for bimolecular tautomerization. See http://www.rsc.org/suppdata/cp/b3/b315089e/

2004 ◽  
Vol 6 (10) ◽  
pp. 2749 ◽  
Author(s):  
Zhibo Yang ◽  
M. T. Rodgers

2005 ◽  
Vol 83 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Evangelos Drougas ◽  
Agnie M Kosmas

Quantum mechanical electronic structure methods are employed to investigate the isomeric and conformeric stuctures of methyl iodoperoxide. Optimized geometries and harmonic vibrational frequencies are calculated at the MP2 level of theory using two types of basis sets, the 6-311G(d,p) for all atoms and the 6-311G(d,p) combined with the LANL2DZ relativistic ECP procedure for iodine. Refinement of the energetics has been accomplished by performing single-point CCSD(T) calculations. Five isomers were determined in total among which iodomethyl hydroperoxide (ICH2OOH) is found to be the lowest energy structure. Conformational barriers and transition states that connect the isomeric forms have been characterized.Key words: methyl iodoperoxide, isomers, conformers.





1982 ◽  
Vol 13 (12) ◽  
Author(s):  
S. WOLFE ◽  
D. J. MITCHELL ◽  
H. B. SCHLEGEL


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