Minnesota Functional Module Version 1.8

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1 1 Minnesota Functional Module Version 1.8 Subroutines for evaluating the M05, M05-2X, M06-L, M06-HF, M06, M06-2X, M08-HX, M08-SO, M11, M11-L, MN12-L, SOGGA, SOGGA11, SOGGA11-X, N12, N12-SX Functionals Documentation Yan Zhao a, Roberto Peverati, b and Donald G. Truhlar c Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, MN a Present affiliation: Hewlett-Packard Co. b Present affiliation: Lawrence Berkeley National Laboratory, University of California, Berkeley. c truhlar@umn.edu Date of code completion: September 05, 2012 Date of most recent change in this manual: September 05, 2012

2 2 Contents Executive summary... 3 Literature references original reference for functionals... 3 Literature references review... 5 Input and output... 5 Notes... 5 Reference energies and gradients... 8 Version History 14

3 3 Executive summary Minnesota Functional Module is a Fortran77 code for evaluating the M05, M05-2X, M06-L, M06-HF, M06, M06-2X, M08-HX, M08-SO, M11, M11-L, MN12-L, MN12-SX, SOGGA, SOGGA11, SOGGA11- X, N12 and N12-SX density functionals. The subroutines are in the accompanying tar file. Literature references A. Original references for functionals M05 Zhao, Y.; Schultz, N. E.; Truhlar, D. G. J. Chem. Phys. 2005, 123, M05-2X Zhao, Y.; Schultz, N. E.; Truhlar, D. G. J. Chem. Theory Comput. 2006, 2,364. M06-L Zhao, Y.; Truhlar, D. G. J. Chem. Phys. 2006, 125, M06-HF Zhao, Y.; Truhlar, D. G. J. Phys. Chem. A 2006, 110, M06 and M06-2X Zhao, Y.; Truhlar, D. G. Theor. Chem. Acc. 2008, 120, 215. M08-HX and M08-SO Zhao, Y.; Truhlar, D. G. J. Chem. Theory Comput. 2008, 4, M11 Peverati, R.; Truhlar, D. G. J. Phys. Chem. Lett. 2011, 2, Note that in eqs 21 and 22 of the M11 paper, Y should be X/100.

4 4 M11-L Peverati, R.; Truhlar, D. G. J. Phys. Chem. Lett. 2012, 3, 117. MN12-L Peverati, R.; Truhlar, D. G. Phys. Chem. Chem. Phys. 2012, in press. MN12-SX Peverati, R.; Truhlar, D. G. Phys. Chem. Chem. Phys. 2012, submitted. SOGGA Zhao, Y.; Truhlar, D. G. J. Chem. Phys. 2008, 128, SOGGA11 Peverati, R.; Zhao, Y.; Truhlar, D. G. J. Phys. Chem. Lett. 2011, 2011, 2, Note that there is a typo in eq. 3 of the SOGGA11 paper. The correct expression is: m x g 1 = x 1 ai 1 1+ µ i=0 κ s2 i SOGGA11-X Peverati, R.; D. G. Truhlar, J. Chem. Phys. 2011, 135,

5 5 N12 Peverati, R.; Truhlar, D. G. Phys. Chem. Chem. Phys. 2012, in press. N12-SX Peverati, R.; Truhlar, D. G. Phys. Chem. Chem. Phys. 2012, submitted. B. Review Zhao, Y.; Truhlar, D. G. Acc. Chem. Res. 2008, 41, 157. Input and output INPUT: RA, RB - Spin densities D1RA, D1RB - Spin density gradients TA, TB - τ σ and τ β NGrid - total number of grid points at which the functional is evaluated. OUTPUT: F - Functional values on the grids D1F - First derivatives with respect to RA, RB, GA, GB, TA, TB on the grids Notes 1. We used Becke s definition (J. Chem. Phys (1996)) of τ σ and τ β. By this definition they are two times larger than spin kinetic energy densities. 2. The correlation part of all Minnesota functionals needs to use the local spin density part of the Perdew-Wang-91 correlation functional (Phys. Rev. B 45, (1992)), which is a fit to the correlation energy of a uniform electron gas (lsdac subroutine). Since we are not allowed to distribute the work of others, users should provide their own subroutine for this LSDA correlation functional, or they may find help on the author s (Kieron Burke) web site at:

6 6 3. The correlation part of all M08-class functionals also needs to use the H(r s,ζ,t) function in the PBE correlation (PBEH0 subroutine). As for the previous point, we are not allowed to distribute this subroutine and users should provide their own, or they may find help on the author s (Kieron Burke) web site at: The correlation parts of the N12 and N12-SX are obtained from B97-like expansion truncated at the fourth order, with the opposite spin contribution calculated as: E cαβ = and the same spin contribution calculated as: E cσσ = UEG drε cαβ UEG drε cσσ n i=0 n i=0 i b i u cαβ i c i u cσσ once again, users should provide their own subroutine for this, and use the parameters in Table 1. Table 1. Parameters of the B97-like expansion for the N12 and N12-SX correlation functionals. N12 N12-SX b D D+00 b D D+00 b D D-01 b D D+00 b D D+00 c D D-01 c D D+00 c D D+01 c D D+01 c D D One needs to add a portion of the Hartree-Fock exchange energy to the total exchange-correlation energy for the M05, M05-2X, M06, M06-2X, M06-HF, M08-HX, M08-SO and SOGGA11-X functionals. See the details in Table 2. Please notice that in our papers we clearly present our functional as:

7 7 E xc = X 100 E x HF + 1 X 100 E DFT DFT x + E c and, depending on how each program implements hybrid functionals, the parameters in the polynomial expansion might need to be multiplied by (1 X/100) to obtain the correct form for the hybrid functional. 6. The exchange part of M11 requires range-separation with the error function with 42.8% short-range HF exchange, and 100% long-range HF exchange. The range parameter ω is The exchange part of N12-SX and MN12-SX requires 25% of screened exchange, which is: 25% short-range HF exchange and 0% long-range HF exchange. The range parameter µ is Table 2. Hartree-Fock exchange energies in the Minnesota functionals Functional Fraction of Hartree-Fock exchange energy M E HFE M05-2X 0.56E HFE M E HFE M06-2X 0.54E HFE M06-HF 1.0E HFE M08-HX E HFE M08-SO E HFE M E SR-HFE + 1.0E LR-HFE (ω = 0.25) N12-SX, MN12-SX 0.25E SX (µ = 0.11) SOGGA, SOGGA11, M06-L, 0 M11-L, SOGGA11-X MN12-L, N E HFE E HFE is the Hartree-Fock exchange energy, E SR-HFE and E LR-HFE are the short-range and longrange Hartree Fock exchange energies respectively, and E SX is the short-range Hartree Fock screened exchange.

8 8 Reference energies and gradients Table 3 and 4 present reference energies and forces of CH 3 (open shell, doublet) and H 2 O (closed shell, singlet) with the 6-31+G** basis set and a pruned (99,590) grid. Geometries of CH 3 (in angstrom) ***************************************************** C H H H ***************************************************** Table 3. Reference energies (E h ) and forces (X,Y,Z, E h /a 0 ) for CH 3 PW6B95 E= C H H H PWB6K E= C H H H SOGGA E= C H H H SOGGA11 E= C H H H SOGGA11-X E= C H H

9 9 H N12 E= C H H H N12-SX E= C H H H M08-HX E= C H H H M11 E= C H H H M11-L E= C H H H MN12-L E= C H H H MN12-SX E= C H H H PBEsol E= C

10 10 H H H WC06 E= C H H H RPBE E= C H H H revpbe E= C H H H B97-3 E= C H H H

11 11 Geometries of H 2 O (in angstrom) ***************************************************** O H H ***************************************************** Table 4. Reference energies (E h ) and forces (X,Y,Z, E h /a 0 ) for H 2 O M06 E= O H H M06-L E= O H H M06-2X E= O H H M06-HF E= O H H M05-2X E= O H H M05 E= O H H M08-HX E= O H H

12 12 M08-SO E= O H H M11 E= O H H M11-L E= O H H MN12-L E= O H H MN12-SX E= O H H SOGGA11 E= O H H SOGGA11-X E= O H H N12 E= O H H N12-SX E= O H H M08-HX E=

13 13 Exchange-only with O E HFE included H H M08-HX E= Correlation and E HFE O only (no meta exchange) H H M08-HX E= Correlation-only with O no meta or HF exchange H H Note: the final three entries in the above table are for developers.

14 14 Version history Version 1, December 31, 2008 Original version Version 1.1, April 23, 2009 Added SOGGA Version 1.2, May 14, 2009 Fixed some bugs, added reference energies and forces in the manual Version 1.3, May 12, 2011 Added SOGGA11 Version 1.4 October 07, 2011 Fixed some bugs, added reference citation for SOGGA11. Version 1.5 November 07, 2011 Added SOGGA11-X and M11 Version 1.6 December 05, 2011 Added M11-L, fixed some bugs Version 1.7 April 18, 2012 Added N12, fixed some bugs Version 1.8 September 05, 2012 Added MN12-L, N12-SX and MN12-SX, fixed some bugs

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