Wall clock time and date at job start Sat Apr 11 2020 06:11:58 AMSOL-version 7.1 by G. D. Hawkins, D. J. Giesen, G. C. Lynch, C. C. Chambers, I. Rossi, J. W. Storer, J. Li, J. D. Thompson, P. Winget, B. J. Lynch, D. Rinaldi, D. A. Liotard, C. J. Cramer, and D. G. Truhlar Copyright 2004 by Regents of the University of Minnesota. All rights reserved. Notice: recipients of this code are asked to comply with the user agreement in Section 1 of the documentation file. ******************************************************************************* * 1SCF - SCF CALCULATION WITHOUT GEOMETRY OPTIMIZATION * - USE EF ROUTINE FOR MINIMUM SEARCH (DEFAULT) * GEO-OK - OVERRIDE INTERATOMIC DISTANCE CHECK * TLIMIT= - A TIME OF 15. SECONDS REQUESTED * CHARGE - CHARGE ON SYSTEM= -1 * AM1 - THE AM1 HAMILTONIAN TO BE USED * DEV - DEVELOPER OPTIONS ARE ALLOWED * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS USER-SPECIFIED * DIELEC - THE SOLVENT DIELECTRIC CONSTANT IS 2.06 * IOFR - THE SOLVENT INDEX OF REFRACTION IS 1.4345 * ALPHA - THE SOLVENT ALPHA IS 0.00 * BETA - THE SOLVENT BETA IS 0.00 * GAMMA - THE SOLVENT MACROSCOPIC SURFACE TENSION IS * 38.93 CAL MOL^-1 ANGSTROM^-2 * FACARB - THE FRACTION OF AROMATIC CARBONS IS 0.00 * FEHALO - THE FRACTION OF ELECTRONEGATIVE HALOGENS IS 0.00 ******************************************************************************* Atom NO. Chemical Bond length Bond angle Dihedral angle number (k) symbol (angstroms) (degrees) (degrees) (I) NA:I NB:NA:I NC:NB:NA:I NA NB NC 1 1 C 2 2 C 1.53001 * 1 3 3 C 1.52995 * 109.47371 * 2 1 4 4 N 1.46901 * 109.47401 * 180.02562 * 3 2 1 5 5 C 1.48533 * 110.99576 * 52.60484 * 4 3 2 6 6 C 1.54939 * 103.22533 * 159.72255 * 5 4 3 7 7 C 1.54592 * 102.92102 * 322.58506 * 6 5 4 8 8 C 1.47899 * 111.00221 * 170.00188 * 4 3 2 9 9 H 1.08998 * 110.08029 * 333.59888 * 8 4 3 10 10 C 1.50700 * 109.91867 * 94.80215 * 8 4 3 11 11 O 1.21278 * 119.99826 * 359.04679 * 10 8 4 12 12 N 1.34771 * 120.00228 * 179.04395 * 10 8 4 13 13 C 1.46493 * 120.00290 * 180.02562 * 12 10 8 14 14 C 1.53007 * 109.47418 * 179.97438 * 13 12 10 15 15 C 1.53000 * 109.47017 * 180.02562 * 14 13 12 16 16 N 1.46901 * 109.46855 * 179.97438 * 15 14 13 17 17 C 1.46898 * 111.00189 * 179.97438 * 16 15 14 18 18 C 1.50696 * 109.47176 * 180.02562 * 17 16 15 19 19 O 1.21288 * 120.00279 * 0.02562 * 18 17 16 20 20 N 1.34777 * 119.99735 * 179.97438 * 18 17 16 21 21 C 1.37105 * 119.99904 * 179.97438 * 20 18 17 22 22 H 1.07991 * 119.99780 * 0.02562 * 21 20 18 23 23 C 1.38954 * 119.99815 * 179.72596 * 21 20 18 24 24 N 1.31414 * 119.99692 * 180.02562 * 23 21 20 25 25 Si 1.86801 * 120.00158 * 0.02562 * 23 21 20 26 26 H 1.48501 * 109.46896 * 89.99806 * 25 23 21 27 27 H 1.48499 * 109.47039 * 209.99966 * 25 23 21 28 28 H 1.48502 * 109.46906 * 329.99872 * 25 23 21 29 29 H 1.09004 * 109.47173 * 300.00178 * 1 2 3 30 30 H 1.09002 * 109.47029 * 59.99320 * 1 2 3 31 31 H 1.08992 * 109.47400 * 179.97438 * 1 2 3 32 32 H 1.08999 * 109.46747 * 240.00001 * 2 1 3 33 33 H 1.08992 * 109.46893 * 120.00119 * 2 1 3 34 34 H 1.09004 * 109.47117 * 59.99788 * 3 2 1 35 35 H 1.09002 * 109.47599 * 300.00331 * 3 2 1 36 36 H 1.08996 * 110.66819 * 41.28624 * 5 4 3 37 37 H 1.08999 * 110.66681 * 278.15478 * 5 4 3 38 38 H 1.08998 * 110.72540 * 204.22333 * 6 5 4 39 39 H 1.09007 * 110.72505 * 80.93995 * 6 5 4 40 40 H 1.08999 * 110.30750 * 263.04050 * 7 6 5 41 41 H 1.09008 * 110.39065 * 140.91289 * 7 6 5 42 42 H 0.97000 * 119.99733 * 359.97438 * 12 10 8 43 43 H 1.09006 * 109.47133 * 60.00057 * 13 12 10 44 44 H 1.08997 * 109.47296 * 299.99789 * 13 12 10 45 45 H 1.08998 * 109.47000 * 59.99701 * 14 13 12 46 46 H 1.08997 * 109.46793 * 300.00193 * 14 13 12 47 47 H 1.08998 * 109.47488 * 59.99989 * 15 14 13 48 48 H 1.08993 * 109.47041 * 299.99616 * 15 14 13 49 49 H 1.00894 * 111.00335 * 303.95823 * 16 15 14 50 50 H 1.09000 * 109.46741 * 60.00112 * 17 16 15 51 51 H 1.09002 * 109.46898 * 300.00102 * 17 16 15 52 52 H 0.97005 * 120.00189 * 0.02562 * 20 18 17 53 53 H 0.96995 * 119.99830 * 180.02562 * 24 23 21 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 6 0.0000 0.0000 0.0000 2 6 1.5300 0.0000 0.0000 3 6 2.0401 1.4424 0.0000 4 7 3.5091 1.4424 -0.0006 5 6 4.0408 0.6004 -1.1027 6 6 5.4886 1.1226 -1.2808 7 6 5.3379 2.6441 -1.0524 8 6 4.0390 2.8022 -0.2404 9 1 3.3169 3.3910 -0.8060 10 6 4.3343 3.4773 1.0742 11 8 4.1112 2.8989 2.1165 12 7 4.8464 4.7239 1.0916 13 6 5.1340 5.3799 2.3695 14 6 5.7041 6.7757 2.1093 15 6 6.0050 7.4606 3.4440 16 7 6.5530 8.8005 3.1941 17 6 6.8540 9.4898 4.4559 18 6 7.4123 10.8580 4.1601 19 8 7.5458 11.2231 3.0112 20 7 7.7623 11.6762 5.1723 21 6 8.2706 12.9208 4.9031 22 1 8.3902 13.2455 3.8802 23 6 8.6262 13.7665 5.9467 24 7 9.1130 14.9596 5.6888 25 14 8.4121 13.2077 7.7163 26 1 9.6508 12.5286 8.1742 27 1 8.1461 14.3867 8.5790 28 1 7.2692 12.2634 7.8023 29 1 -0.3634 0.5139 0.8900 30 1 -0.3633 0.5139 -0.8899 31 1 -0.3634 -1.0276 -0.0005 32 1 1.8933 -0.5138 -0.8900 33 1 1.8933 -0.5138 0.8899 34 1 1.6767 1.9563 0.8900 35 1 1.6767 1.9564 -0.8899 36 1 3.4628 0.7503 -2.0145 37 1 4.0437 -0.4512 -0.8162 38 1 5.8513 0.9178 -2.2881 39 1 6.1513 0.6844 -0.5345 40 1 5.2528 3.1634 -2.0070 41 1 6.1866 3.0293 -0.4872 42 1 5.0252 5.1863 0.2579 43 1 5.8614 4.7886 2.9258 44 1 4.2149 5.4648 2.9493 45 1 4.9771 7.3672 1.5527 46 1 6.6232 6.6905 1.5297 47 1 6.7322 6.8690 4.0002 48 1 5.0861 7.5458 4.0239 49 1 7.3699 8.7529 2.6039 50 1 7.5866 8.9122 5.0196 51 1 5.9406 9.5895 5.0424 52 1 7.6552 11.3843 6.0911 53 1 9.3615 15.5499 6.4172 RHF calculation, no. of doubly occupied orbitals= 66 REFERENCES FOR PARAMETERS IN GAS-PHASE HAMILTONIAN: H: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) C: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) N: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) O: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) Si: (AM1): M.J.S.DEWAR, C. JIE, ORGANOMETALLICS, 6, 1486-1490 (1987). REFERENCE FOR CHARGE MODEL 2: J. Li, J. Xing, C. J. Cramer, and D. G. Truhlar, J. Chem. Phys. 111 (1999) 885. REFERENCE FOR THE PARAMETERIZATION OF THE SM5.42R SOLVATION MODEL: J. Li, T. Zhu, G. D. Hawkins, P. Winget, D. A. Liotard, C. J. Cramer, and D. G. Truhlar, Theor. Chem. Acc. 103 (1999) 9-63 P. Winget, J. D. Thompson C. J. Cramer,and D. G. Truhlar, J. Phys. Chem. B. submitted. CHARGE=-1 AM1 1SCF TLIMIT=15 GEO-OK SM5.42R & SOLVNT=GENORG IOFR=1.4345 ALPHA=0.00 BETA=0.00 GAMMA=38.93 & DIELEC=2.06 FACARB=0.00 FEHALO=0.00 DEV ZINC001159327382.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sat Apr 11 2020 06:11:58 Heat of formation + Delta-G solvation = -72.728027 kcal Electronic energy + Delta-G solvation = -28545.208030 eV Core-core repulsion = 24451.384799 eV Total energy + Delta-G solvation = -4093.823231 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.67 seconds Orbital eigenvalues (eV) -40.62702 -38.66517 -38.45293 -36.54829 -35.07132 -34.80799 -33.89704 -31.81150 -31.56055 -31.24632 -29.77144 -27.22473 -25.95987 -24.90769 -23.42965 -22.64626 -22.21496 -21.76163 -20.75870 -20.15644 -19.36723 -18.33800 -17.58121 -16.81463 -16.53273 -16.16367 -15.90044 -15.68794 -15.33522 -15.18402 -14.92147 -14.54181 -14.21839 -14.15482 -13.90809 -13.70244 -13.56831 -13.40119 -13.17516 -12.97796 -12.90270 -12.38326 -12.31113 -12.17732 -11.98467 -11.89690 -11.83283 -11.70021 -11.66471 -11.52964 -11.30473 -11.28563 -11.19366 -11.06894 -11.00368 -10.59645 -9.99707 -9.97320 -9.57688 -9.30150 -8.83991 -8.60716 -8.20896 -8.15350 -6.31572 -3.83069 2.42999 2.70794 3.03044 3.06764 3.15189 3.55032 3.73624 4.03191 4.06145 4.10149 4.12511 4.36494 4.52459 4.58087 4.61581 4.69578 4.75264 4.80072 4.89124 4.97764 5.00192 5.01980 5.06709 5.15935 5.21752 5.25074 5.25609 5.30757 5.36825 5.38977 5.46673 5.51256 5.57490 5.59689 5.62858 5.64901 5.76870 5.80641 5.81805 5.90362 5.94814 6.00563 6.18220 6.33605 6.55260 7.06304 7.25792 7.54779 7.58078 8.04129 8.13995 8.59355 8.94432 9.42020 9.82140 10.81550 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.028063 B = 0.001348 C = 0.001316 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 997.512214 B =20765.284673 C =21268.246068 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.151 4.151 2 C -0.123 4.123 3 C 0.048 3.952 4 N -0.493 5.493 5 C 0.035 3.965 6 C -0.123 4.123 7 C -0.124 4.124 8 C 0.047 3.953 9 H 0.079 0.921 10 C 0.519 3.481 11 O -0.517 6.517 12 N -0.733 5.733 13 C 0.123 3.877 14 C -0.129 4.129 15 C 0.063 3.937 16 N -0.670 5.670 17 C 0.048 3.952 18 C 0.450 3.550 19 O -0.565 6.565 20 N -0.590 5.590 21 C -0.306 4.306 22 H 0.120 0.880 23 C 0.042 3.958 24 N -0.881 5.881 25 Si 0.880 3.120 26 H -0.271 1.271 27 H -0.276 1.276 28 H -0.269 1.269 29 H 0.056 0.944 30 H 0.052 0.948 31 H 0.057 0.943 32 H 0.062 0.938 33 H 0.072 0.928 34 H 0.079 0.921 35 H 0.034 0.966 36 H 0.047 0.953 37 H 0.087 0.913 38 H 0.076 0.924 39 H 0.077 0.923 40 H 0.079 0.921 41 H 0.079 0.921 42 H 0.400 0.600 43 H 0.066 0.934 44 H 0.068 0.932 45 H 0.080 0.920 46 H 0.069 0.931 47 H 0.030 0.970 48 H 0.074 0.926 49 H 0.350 0.650 50 H 0.045 0.955 51 H 0.088 0.912 52 H 0.371 0.629 53 H 0.273 0.727 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -12.531 -31.570 -12.796 36.296 Note: The Mulliken population analysis charges presented below were not used in the solvation calculation but are provided for completeness. The chosen solvation model uses CM2 partial charges for calculating solvation energies. Net atomic charges, atomic populations, and dipole contributions using Mulliken population analysis Atom NO. Type Charge No. of electrons 1 C -0.209 4.209 2 C -0.160 4.160 3 C -0.079 4.079 4 N -0.218 5.218 5 C -0.092 4.092 6 C -0.162 4.162 7 C -0.162 4.162 8 C -0.065 4.065 9 H 0.096 0.904 10 C 0.304 3.696 11 O -0.390 6.390 12 N -0.387 5.387 13 C -0.001 4.001 14 C -0.167 4.167 15 C -0.068 4.068 16 N -0.302 5.302 17 C -0.085 4.085 18 C 0.235 3.765 19 O -0.447 6.447 20 N -0.230 5.230 21 C -0.435 4.435 22 H 0.137 0.863 23 C -0.161 4.161 24 N -0.521 5.521 25 Si 0.706 3.294 26 H -0.196 1.196 27 H -0.201 1.201 28 H -0.194 1.194 29 H 0.075 0.925 30 H 0.071 0.929 31 H 0.076 0.924 32 H 0.080 0.920 33 H 0.091 0.909 34 H 0.097 0.903 35 H 0.052 0.948 36 H 0.065 0.935 37 H 0.105 0.895 38 H 0.095 0.905 39 H 0.096 0.904 40 H 0.097 0.903 41 H 0.097 0.903 42 H 0.234 0.766 43 H 0.085 0.915 44 H 0.086 0.914 45 H 0.099 0.901 46 H 0.088 0.912 47 H 0.048 0.952 48 H 0.092 0.908 49 H 0.170 0.830 50 H 0.063 0.937 51 H 0.106 0.894 52 H 0.203 0.797 53 H 0.084 0.916 Dipole moment (debyes) X Y Z Total from point charges -12.987 -31.432 -12.264 36.153 hybrid contribution 0.432 -0.032 0.685 0.810 sum -12.555 -31.464 -11.579 35.800 Atomic orbital electron populations 1.21735 0.95403 1.01873 1.01918 1.21568 0.95784 0.95990 1.02703 1.22384 0.86772 0.97760 1.01034 1.64398 1.08197 1.06016 1.43139 1.23276 0.94768 0.98742 0.92430 1.22497 0.96900 0.94512 1.02243 1.22424 0.96090 0.97925 0.99811 1.22359 0.98266 0.92127 0.93777 0.90372 1.20381 0.77206 0.80952 0.91095 1.90705 1.50674 1.63872 1.33799 1.46010 1.66459 1.16413 1.09807 1.21287 1.00772 0.92686 0.85376 1.21740 1.02076 0.94188 0.98703 1.21830 0.99913 0.89000 0.96011 1.60028 1.37978 1.16788 1.15419 1.21704 1.00378 0.94479 0.91922 1.19710 0.84152 0.86587 0.86017 1.90559 1.57658 1.76065 1.20456 1.42212 1.58314 1.15739 1.06723 1.19440 1.37995 0.88844 0.97188 0.86284 1.25037 0.97269 0.95417 0.98377 1.69622 1.42247 1.07463 1.32796 0.86670 0.78762 0.79021 0.84939 1.19650 1.20149 1.19450 0.92460 0.92886 0.92432 0.91979 0.90894 0.90254 0.94816 0.93491 0.89471 0.90512 0.90385 0.90259 0.90250 0.76640 0.91541 0.91372 0.90115 0.91224 0.95199 0.90766 0.83018 0.93685 0.89424 0.79662 0.91608 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 13. Note: The number of geometries may not correspond to the number of cycles due to rejected geometry changes. In the following table subtotal= G_P + SS G_CDS. Atom Chem. CM2 G_P Area Sigma k SS G_CDS Subtotal M number symbol chg. (kcal) (Ang**2) cal/(Ang**2) (kcal) (kcal) value 1 C -0.15 -0.79 9.91 37.16 0.37 -0.42 16 2 C -0.12 -0.76 5.59 -26.73 -0.15 -0.91 16 3 C 0.05 0.36 5.03 -3.83 -0.02 0.34 16 4 N -0.49 -4.11 4.53 -223.95 -1.02 -5.12 16 5 C 0.04 0.21 5.10 -1.90 -0.01 0.20 16 6 C -0.12 -0.65 7.06 -24.87 -0.18 -0.83 16 7 C -0.12 -0.67 6.47 -25.38 -0.16 -0.83 16 8 C 0.05 0.35 2.87 -67.80 -0.19 0.15 16 9 H 0.08 0.48 7.58 -51.93 -0.39 0.08 16 10 C 0.52 5.27 6.99 -10.99 -0.08 5.19 16 11 O -0.52 -7.51 16.46 5.56 0.09 -7.42 16 12 N -0.73 -5.86 5.42 -60.30 -0.33 -6.19 16 13 C 0.12 1.09 5.67 -4.04 -0.02 1.07 16 14 C -0.13 -1.14 5.59 -26.73 -0.15 -1.29 16 15 C 0.06 0.68 5.69 -3.82 -0.02 0.66 16 16 N -0.67 -10.02 6.12 -115.06 -0.70 -10.72 16 17 C 0.05 0.79 6.17 -4.98 -0.03 0.76 16 18 C 0.45 10.19 7.82 -10.99 -0.09 10.11 16 19 O -0.57 -15.15 15.78 5.55 0.09 -15.06 16 20 N -0.59 -14.08 5.09 -10.96 -0.06 -14.14 16 21 C -0.31 -8.68 10.16 -14.93 -0.15 -8.83 16 22 H 0.12 3.85 7.39 -52.49 -0.39 3.47 16 23 C 0.04 1.15 5.50 -17.47 -0.10 1.06 16 24 N -0.88 -25.75 13.96 55.50 0.77 -24.97 16 25 Si 0.88 19.36 27.73 -169.99 -4.71 14.65 16 26 H -0.27 -5.84 7.11 56.52 0.40 -5.43 16 27 H -0.28 -6.10 7.11 56.52 0.40 -5.70 16 28 H -0.27 -5.41 6.52 56.52 0.37 -5.04 16 29 H 0.06 0.32 8.14 -51.93 -0.42 -0.10 16 30 H 0.05 0.25 8.14 -51.93 -0.42 -0.17 16 31 H 0.06 0.26 8.14 -51.93 -0.42 -0.16 16 32 H 0.06 0.33 6.79 -51.93 -0.35 -0.02 16 33 H 0.07 0.53 8.14 -51.93 -0.42 0.11 16 34 H 0.08 0.73 8.14 -51.93 -0.42 0.30 16 35 H 0.03 0.22 7.82 -51.93 -0.41 -0.19 16 36 H 0.05 0.23 8.00 -51.93 -0.42 -0.18 16 37 H 0.09 0.49 7.66 -51.93 -0.40 0.10 16 38 H 0.08 0.28 8.14 -51.93 -0.42 -0.14 16 39 H 0.08 0.49 8.14 -51.93 -0.42 0.06 16 40 H 0.08 0.29 8.14 -51.93 -0.42 -0.14 16 41 H 0.08 0.46 7.62 -51.92 -0.40 0.07 16 42 H 0.40 2.20 8.43 -40.82 -0.34 1.85 16 43 H 0.07 0.65 8.14 -51.93 -0.42 0.23 16 44 H 0.07 0.67 8.14 -51.93 -0.42 0.25 16 45 H 0.08 0.75 8.14 -51.93 -0.42 0.33 16 46 H 0.07 0.58 8.14 -51.93 -0.42 0.16 16 47 H 0.03 0.31 8.14 -51.93 -0.42 -0.12 16 48 H 0.07 0.79 8.14 -51.93 -0.42 0.37 16 49 H 0.35 5.37 8.43 -39.29 -0.33 5.04 16 50 H 0.05 0.64 8.14 -51.93 -0.42 0.22 16 51 H 0.09 1.30 8.14 -51.93 -0.42 0.88 16 52 H 0.37 7.74 5.76 -40.82 -0.24 7.51 16 53 H 0.27 7.37 8.31 -40.82 -0.34 7.03 16 LS Contribution 425.53 15.07 6.41 6.41 Total: -1.00 -35.46 425.53 -10.02 -45.49 By element: Atomic # 1 Polarization: 20.24 SS G_CDS: -9.59 Total: 10.64 kcal Atomic # 6 Polarization: 7.41 SS G_CDS: -0.98 Total: 6.43 kcal Atomic # 7 Polarization: -59.81 SS G_CDS: -1.33 Total: -61.14 kcal Atomic # 8 Polarization: -22.66 SS G_CDS: 0.18 Total: -22.48 kcal Atomic # 14 Polarization: 19.36 SS G_CDS: -4.71 Total: 14.65 kcal Total LS contribution 6.41 Total: 6.41 kcal Total: -35.46 -10.02 -45.49 kcal The number of atoms in the molecule is 53 The average number of expansion shells was 16.00 The maximum number of expansion shells was 16 The minimum number of expansion shells was 16 **** NOTA BENE **** This is the net solvation energy for this exact molecular structure (nuclear and electronic)! The standard-state solvation energy should be obtained as the difference between the heat of formation plus delta-G solvation for the relaxed solvated system and that for the relaxed gas-phase system. ZINC001159327382.mol2 53 1SCF run This is a breakdown of the solvation energy calculated without geometric relaxation in solution: (1) E-EN(sol) electronic-nuclear energy of solute -27.243 kcal (2) G-P(sol) polarization free energy of solvation -35.462 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -62.705 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.023 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.485 kcal (6) G-S(sol) free energy of system = (1) + (5) -72.728 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.67 seconds