Prediction of Rate Coefficients for the H 2 CO + OH → HCO + H 2 O Reaction at Combustion, Atmospheric and Interstellar Medium Conditions Gladson de Souza Machado 1 ; Eduardo Monteiro Martins 2 ; Leonardo Baptista 3 ; Glauco F. Bauerfeldt 1, 1. Instituto de Química. Universidade Federal Rural do Rio de Janeiro, BR-465 km 7 Seropédica – RJ, Brazil. 2. Departamento de Engenharia Sanitária e do Meio Ambiente, Faculdade de Engenharia Universidade do Estado do Rio de Janeiro, Rio de Janeiro – RJ, Brazil. 3. Departamento de Química e Ambiental, Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Rodovia Presidente Dutra km 298, Resende - RJ, Brazil. Supporting Information Contents Cartesian coordinates (angstroms) and vibrational frequencies (cm -1 ) of stationary and saddle point. ...........................................................................................................................................S3 Electronic energy, zero point correction and thermal correction to enthalpy MP2/ACCD and electronic energy MP4/ACCD//MP2/ACCD (hartree)..................................................................S9 Energy differences at MP2/ACCD and MP4/ACCD//MP2/ACCD levels (kcal∙mol -1 ) ..................S10 Electronic energy, zero point correction and thermal correction to enthalpy CISD/ACCD and electronic energy QCISD(T)/ACCD//CISD/ACCD (hartree) .........................................................S11 Energy differences at CISD/ACCD and QCISD(T)/ACCD//CISD/ACCD levels (kcal∙mol -1 ) ...........S12 Electronic energy, zero point correction and thermal correction to enthalpy CCSD/ACCD and electronic energy CCSD(T)/ACCD//CCSD/ACCD and CCSD(T)/CBS//CCSD/ACCD (hartree) .......S13 Energy differences at CCSD/ACCD, CCSD(T)/ACCD//CCSD/ACCD and CCSD(T)/CBS//CCSD/ACCD levels (kcal∙mol -1 ) .......................................................................................................................S14  Corresponding author: bauerfeldt@ufrrj.br