Wall clock time and date at job start Sat Apr 11 2020 06:11:19 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 1.52998 * 1 3 3 C 1.52991 * 109.47350 * 2 1 4 4 H 1.09005 * 109.46953 * 304.81395 * 3 2 1 5 5 C 1.52994 * 109.47352 * 184.81404 * 3 2 1 6 6 C 1.53003 * 109.47457 * 64.81065 * 3 2 1 7 7 H 1.09007 * 109.47057 * 306.04845 * 6 3 2 8 8 N 1.46495 * 109.47569 * 186.04133 * 6 3 2 9 9 C 1.34779 * 119.99753 * 86.57692 * 8 6 3 10 10 O 1.21586 * 119.99786 * 355.06453 * 9 8 6 11 11 N 1.34774 * 120.00129 * 175.06352 * 9 8 6 12 12 C 1.47031 * 125.64463 * 359.69297 * 11 9 8 13 13 C 1.54316 * 107.27049 * 180.96706 * 12 11 9 14 14 C 1.55154 * 102.86474 * 22.52848 * 13 12 11 15 15 C 1.47419 * 125.65044 * 180.02562 * 11 9 8 16 16 C 1.50702 * 109.46593 * 66.04360 * 6 3 2 17 17 O 1.20821 * 120.00110 * 120.00779 * 16 6 3 18 18 O 1.34237 * 120.00215 * 299.99731 * 16 6 3 19 19 C 1.45197 * 117.00177 * 180.02562 * 18 16 6 20 20 C 1.52992 * 109.47066 * 180.02562 * 19 18 16 21 21 C 1.53004 * 109.47125 * 180.02562 * 20 19 18 22 22 C 1.50700 * 109.47224 * 179.97438 * 21 20 19 23 23 H 1.08004 * 120.00008 * 359.97438 * 22 21 20 24 24 C 1.37881 * 119.99990 * 179.97438 * 22 21 20 25 25 N 1.31515 * 119.99940 * 359.97438 * 24 22 21 26 26 Si 1.86797 * 119.99908 * 180.02562 * 24 22 21 27 27 H 1.48497 * 109.47564 * 59.99781 * 26 24 22 28 28 H 1.48499 * 109.47226 * 180.02562 * 26 24 22 29 29 H 1.48503 * 109.46861 * 299.99668 * 26 24 22 30 30 H 1.09004 * 109.46960 * 302.48991 * 1 2 3 31 31 H 1.08996 * 109.47080 * 62.49707 * 1 2 3 32 32 H 1.09008 * 109.47384 * 182.49901 * 1 2 3 33 33 H 1.09004 * 109.46944 * 239.99648 * 2 1 3 34 34 H 1.09009 * 109.47150 * 119.99888 * 2 1 3 35 35 H 1.09001 * 109.47444 * 300.00221 * 5 3 2 36 36 H 1.09000 * 109.47330 * 59.99656 * 5 3 2 37 37 H 1.09006 * 109.47767 * 179.97438 * 5 3 2 38 38 H 0.96999 * 120.00248 * 266.31015 * 8 6 3 39 39 H 1.08996 * 109.88148 * 300.51506 * 12 11 9 40 40 H 1.09000 * 109.87859 * 61.68084 * 12 11 9 41 41 H 1.08997 * 110.92149 * 264.10896 * 13 12 11 42 42 H 1.09001 * 110.58759 * 140.78972 * 13 12 11 43 43 H 1.09000 * 110.99941 * 206.22908 * 14 13 12 44 44 H 1.09001 * 111.00606 * 82.37987 * 14 13 12 45 45 H 1.09000 * 110.36914 * 274.67382 * 15 11 9 46 46 H 1.09000 * 110.36702 * 36.88783 * 15 11 9 47 47 H 1.09003 * 109.47194 * 300.00354 * 19 18 16 48 48 H 1.09003 * 109.46853 * 60.00375 * 19 18 16 49 49 H 1.09003 * 109.47032 * 299.99999 * 20 19 18 50 50 H 1.08994 * 109.47548 * 60.00198 * 20 19 18 51 51 H 1.09003 * 109.46902 * 299.99757 * 21 20 19 52 52 H 1.09003 * 109.47086 * 59.99741 * 21 20 19 53 53 H 0.96994 * 119.99667 * 179.97438 * 25 24 22 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 2.0400 1.4424 0.0000 4 1 1.6079 1.9805 -0.8438 5 6 3.5651 1.4441 -0.1211 6 6 1.6312 2.1280 1.3053 7 1 0.5543 2.0325 1.4441 8 7 1.9921 3.5465 1.2458 9 6 1.1405 4.4361 0.6982 10 8 0.1136 4.0509 0.1733 11 7 1.4271 5.7526 0.7324 12 6 2.6248 6.3533 1.3378 13 6 2.5109 7.8818 1.1591 14 6 0.9853 8.0953 0.9743 15 6 0.5885 6.8293 0.1751 16 6 2.3463 1.4758 2.4605 17 8 3.0818 2.1289 3.1621 18 8 2.1660 0.1692 2.7101 19 6 2.8862 -0.3917 3.8392 20 6 2.5576 -1.8807 3.9649 21 6 3.3160 -2.4717 5.1551 22 6 2.9918 -3.9381 5.2793 23 1 2.3124 -4.4021 4.5795 24 6 3.5626 -4.6875 6.2862 25 7 4.3902 -4.1225 7.1379 26 14 3.1613 -6.5054 6.4396 27 1 3.5659 -7.2084 5.1958 28 1 3.8973 -7.0790 7.5949 29 1 1.7010 -6.6738 6.6508 30 1 -0.3633 0.5520 0.8669 31 1 -0.3633 0.4746 -0.9115 32 1 -0.3634 -1.0267 0.0448 33 1 1.8933 -0.5139 -0.8900 34 1 1.8933 -0.5139 0.8901 35 1 3.9972 0.9059 0.7226 36 1 3.8564 0.9557 -1.0510 37 1 3.9286 2.4718 -0.1215 38 1 2.8423 3.8461 1.6040 39 1 2.6688 6.1043 2.3980 40 1 3.5186 5.9884 0.8318 41 1 3.0565 8.2121 0.2752 42 1 2.8678 8.3995 2.0495 43 1 0.7842 8.9994 0.3995 44 1 0.4755 8.1249 1.9373 45 1 0.8029 6.9672 -0.8847 46 1 -0.4675 6.6019 0.3213 47 1 3.9581 -0.2684 3.6841 48 1 2.5894 0.1245 4.7522 49 1 1.4857 -2.0043 4.1199 50 1 2.8546 -2.3967 3.0519 51 1 4.3879 -2.3479 5.0005 52 1 3.0186 -1.9556 6.0679 53 1 4.7914 -4.6496 7.8464 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 ZINC000736831082.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 06:11:19 Heat of formation + Delta-G solvation = -138.553076 kcal Electronic energy + Delta-G solvation = -30755.884057 eV Core-core repulsion = 26626.913686 eV Total energy + Delta-G solvation = -4128.970371 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.62 seconds Orbital eigenvalues (eV) -41.16184 -40.16298 -38.12912 -36.83391 -36.53173 -34.10995 -33.87120 -31.88686 -31.71476 -30.18782 -29.41550 -28.03006 -26.72297 -24.07448 -23.75889 -23.15457 -21.74240 -21.58237 -20.62117 -20.32514 -19.45981 -18.79110 -17.38650 -16.98662 -16.81232 -16.45316 -16.31832 -15.75581 -15.17281 -14.80038 -14.71021 -14.48478 -14.06841 -13.92060 -13.89096 -13.70858 -13.48552 -13.26714 -13.09447 -12.76181 -12.59585 -12.21155 -12.18677 -11.96329 -11.91361 -11.81849 -11.68907 -11.67115 -11.23478 -11.09480 -10.99972 -10.87312 -10.76554 -10.69322 -10.56603 -10.44222 -10.37364 -10.29428 -9.74612 -9.55606 -9.38838 -9.19355 -8.88026 -8.39904 -6.04891 -4.07969 2.04002 2.17253 2.78010 2.97502 3.31762 3.36121 3.38716 3.62560 4.10593 4.17457 4.41394 4.43850 4.52450 4.63181 4.77863 4.80301 4.84901 4.92012 5.12699 5.20097 5.26752 5.31056 5.37847 5.38578 5.40870 5.43216 5.50060 5.52906 5.55219 5.58854 5.66085 5.68215 5.79250 5.85501 5.90189 5.96712 6.05719 6.11024 6.12349 6.28763 6.38456 6.50808 6.56017 6.69624 6.77439 6.95214 7.57838 7.61605 7.68698 7.77498 7.93150 8.28579 8.34066 8.98019 9.56357 11.06473 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.019192 B = 0.002100 C = 0.001978 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1458.585419 B =13328.650430 C =14152.805872 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.149 4.149 2 C -0.133 4.133 3 C -0.094 4.094 4 H 0.091 0.909 5 C -0.152 4.152 6 C 0.174 3.826 7 H 0.127 0.873 8 N -0.728 5.728 9 C 0.728 3.272 10 O -0.584 6.584 11 N -0.636 5.636 12 C 0.095 3.905 13 C -0.129 4.129 14 C -0.135 4.135 15 C 0.125 3.875 16 C 0.460 3.540 17 O -0.510 6.510 18 O -0.343 6.343 19 C 0.065 3.935 20 C -0.108 4.108 21 C 0.025 3.975 22 C -0.522 4.522 23 H 0.057 0.943 24 C 0.057 3.943 25 N -0.895 5.895 26 Si 0.895 3.105 27 H -0.276 1.276 28 H -0.287 1.287 29 H -0.276 1.276 30 H 0.054 0.946 31 H 0.051 0.949 32 H 0.057 0.943 33 H 0.067 0.933 34 H 0.093 0.907 35 H 0.055 0.945 36 H 0.064 0.936 37 H 0.054 0.946 38 H 0.405 0.595 39 H 0.070 0.930 40 H 0.067 0.933 41 H 0.078 0.922 42 H 0.083 0.917 43 H 0.086 0.914 44 H 0.077 0.923 45 H 0.066 0.934 46 H 0.079 0.921 47 H 0.067 0.933 48 H 0.067 0.933 49 H 0.061 0.939 50 H 0.061 0.939 51 H 0.019 0.981 52 H 0.019 0.981 53 H 0.262 0.738 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -4.209 24.146 -16.377 29.478 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 -0.207 4.207 2 C -0.170 4.170 3 C -0.114 4.114 4 H 0.109 0.891 5 C -0.209 4.209 6 C 0.067 3.933 7 H 0.145 0.855 8 N -0.385 5.385 9 C 0.430 3.570 10 O -0.461 6.461 11 N -0.375 5.375 12 C -0.028 4.028 13 C -0.167 4.167 14 C -0.173 4.173 15 C 0.002 3.998 16 C 0.302 3.698 17 O -0.399 6.399 18 O -0.258 6.258 19 C -0.008 4.008 20 C -0.146 4.146 21 C -0.012 4.012 22 C -0.560 4.560 23 H 0.076 0.924 24 C -0.145 4.145 25 N -0.534 5.534 26 Si 0.723 3.277 27 H -0.202 1.202 28 H -0.213 1.213 29 H -0.202 1.202 30 H 0.073 0.927 31 H 0.070 0.930 32 H 0.076 0.924 33 H 0.086 0.914 34 H 0.111 0.889 35 H 0.074 0.926 36 H 0.083 0.917 37 H 0.073 0.927 38 H 0.242 0.758 39 H 0.088 0.912 40 H 0.085 0.915 41 H 0.096 0.904 42 H 0.102 0.898 43 H 0.104 0.896 44 H 0.096 0.904 45 H 0.084 0.916 46 H 0.098 0.902 47 H 0.086 0.914 48 H 0.086 0.914 49 H 0.080 0.920 50 H 0.080 0.920 51 H 0.037 0.963 52 H 0.037 0.963 53 H 0.072 0.928 Dipole moment (debyes) X Y Z Total from point charges -4.642 23.881 -16.343 29.308 hybrid contribution 0.518 -0.747 0.601 1.090 sum -4.124 23.134 -15.742 28.284 Atomic orbital electron populations 1.21769 0.95520 1.01778 1.01603 1.21825 0.96466 0.94707 1.04045 1.21526 0.96684 0.97327 0.95869 0.89122 1.21900 0.94707 1.01739 1.02545 1.20460 1.01291 0.79660 0.91921 0.85513 1.44806 1.22259 1.05909 1.65569 1.15230 0.82963 0.79431 0.79359 1.90945 1.26712 1.77925 1.50565 1.47534 1.24227 1.04013 1.61769 1.22061 0.88072 0.94108 0.98588 1.22602 0.96833 0.94169 1.03126 1.22812 0.95798 0.97478 1.01213 1.22082 0.95796 0.84804 0.97145 1.23435 0.79832 0.81855 0.84678 1.90640 1.36250 1.64354 1.48672 1.86557 1.65996 1.23549 1.49744 1.23585 0.95685 0.96137 0.85384 1.21770 1.01855 0.89151 1.01822 1.19045 0.95269 0.95592 0.91337 1.21129 1.27348 0.94078 1.13436 0.92449 1.25031 0.95055 0.98690 0.95704 1.69953 1.30245 1.36332 1.16837 0.86603 0.78515 0.85006 0.77567 1.20167 1.21280 1.20169 0.92720 0.92994 0.92422 0.91436 0.88866 0.92555 0.91702 0.92721 0.75837 0.91208 0.91503 0.90362 0.89812 0.89580 0.90435 0.91583 0.90223 0.91434 0.91449 0.92038 0.92042 0.96277 0.96289 0.92839 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 -1.65 9.73 37.16 0.36 -1.29 16 2 C -0.13 -1.49 5.21 -26.74 -0.14 -1.63 16 3 C -0.09 -1.05 2.35 -90.63 -0.21 -1.26 16 4 H 0.09 1.05 8.14 -51.93 -0.42 0.62 16 5 C -0.15 -1.59 8.75 37.15 0.33 -1.27 16 6 C 0.17 2.16 2.15 -69.08 -0.15 2.02 16 7 H 0.13 1.66 5.71 -51.93 -0.30 1.37 16 8 N -0.73 -8.41 4.38 -59.81 -0.26 -8.67 16 9 C 0.73 9.01 8.46 -86.92 -0.74 8.27 16 10 O -0.58 -9.00 16.28 5.29 0.09 -8.92 16 11 N -0.64 -5.98 3.33 -176.25 -0.59 -6.57 16 12 C 0.09 0.63 6.15 -3.06 -0.02 0.61 16 13 C -0.13 -0.56 6.95 -24.90 -0.17 -0.74 16 14 C -0.13 -0.63 7.08 -24.59 -0.17 -0.81 16 15 C 0.12 0.93 6.91 -2.54 -0.02 0.91 16 16 C 0.46 6.74 5.76 36.01 0.21 6.95 16 17 O -0.51 -8.41 15.60 -18.75 -0.29 -8.71 16 18 O -0.34 -5.36 7.35 -39.28 -0.29 -5.65 16 19 C 0.06 1.15 5.47 37.15 0.20 1.35 16 20 C -0.11 -2.18 5.53 -26.73 -0.15 -2.32 16 21 C 0.02 0.62 4.97 -27.88 -0.14 0.48 16 22 C -0.52 -14.53 9.11 -34.44 -0.31 -14.84 16 23 H 0.06 1.54 7.74 -52.48 -0.41 1.14 16 24 C 0.06 1.61 5.46 -17.82 -0.10 1.51 16 25 N -0.89 -26.64 13.29 55.43 0.74 -25.90 16 26 Si 0.90 21.46 29.54 -169.99 -5.02 16.44 16 27 H -0.28 -6.49 7.11 56.52 0.40 -6.09 16 28 H -0.29 -6.82 7.11 56.52 0.40 -6.42 16 29 H -0.28 -6.50 7.11 56.52 0.40 -6.10 16 30 H 0.05 0.63 6.33 -51.93 -0.33 0.30 16 31 H 0.05 0.54 8.14 -51.93 -0.42 0.12 16 32 H 0.06 0.61 8.14 -51.92 -0.42 0.19 16 33 H 0.07 0.69 8.14 -51.93 -0.42 0.26 16 34 H 0.09 1.20 5.24 -51.92 -0.27 0.93 16 35 H 0.06 0.67 7.05 -51.93 -0.37 0.31 16 36 H 0.06 0.60 8.14 -51.93 -0.42 0.18 16 37 H 0.05 0.54 7.79 -51.93 -0.40 0.13 16 38 H 0.41 4.34 6.83 -40.82 -0.28 4.06 16 39 H 0.07 0.48 8.14 -51.93 -0.42 0.06 16 40 H 0.07 0.40 8.14 -51.93 -0.42 -0.02 16 41 H 0.08 0.28 8.14 -51.93 -0.42 -0.14 16 42 H 0.08 0.29 8.14 -51.93 -0.42 -0.14 16 43 H 0.09 0.26 8.14 -51.93 -0.42 -0.16 16 44 H 0.08 0.39 8.14 -51.93 -0.42 -0.03 16 45 H 0.07 0.45 8.14 -51.93 -0.42 0.03 16 46 H 0.08 0.68 8.03 -51.93 -0.42 0.26 16 47 H 0.07 1.19 8.13 -51.93 -0.42 0.77 16 48 H 0.07 1.21 8.13 -51.93 -0.42 0.79 16 49 H 0.06 1.22 8.14 -51.93 -0.42 0.79 16 50 H 0.06 1.20 8.14 -51.93 -0.42 0.78 16 51 H 0.02 0.50 8.14 -51.93 -0.42 0.08 16 52 H 0.02 0.50 8.14 -51.93 -0.42 0.08 16 53 H 0.26 7.37 8.31 -40.82 -0.34 7.03 16 LS Contribution 420.68 15.07 6.34 6.34 Total: -1.00 -32.47 420.68 -10.02 -42.49 By element: Atomic # 1 Polarization: 10.70 SS G_CDS: -9.51 Total: 1.19 kcal Atomic # 6 Polarization: -0.84 SS G_CDS: -1.22 Total: -2.06 kcal Atomic # 7 Polarization: -41.03 SS G_CDS: -0.11 Total: -41.14 kcal Atomic # 8 Polarization: -22.78 SS G_CDS: -0.50 Total: -23.27 kcal Atomic # 14 Polarization: 21.46 SS G_CDS: -5.02 Total: 16.44 kcal Total LS contribution 6.34 Total: 6.34 kcal Total: -32.47 -10.02 -42.49 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. ZINC000736831082.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 -96.058 kcal (2) G-P(sol) polarization free energy of solvation -32.473 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -128.531 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.022 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.495 kcal (6) G-S(sol) free energy of system = (1) + (5) -138.553 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.62 seconds