Wall clock time and date at job start Sat Apr 11 2020 06:10:29 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 1.31003 * 1 3 3 C 1.50705 * 119.99824 * 2 1 4 4 C 1.50695 * 120.00186 * 180.02562 * 2 1 3 5 5 C 1.53002 * 109.47029 * 94.99763 * 4 2 1 6 6 N 1.46903 * 109.46781 * 180.02562 * 5 4 2 7 7 C 1.46903 * 110.99905 * 180.02562 * 6 5 4 8 8 H 1.08999 * 109.45704 * 35.02809 * 7 6 5 9 9 C 1.53035 * 109.46078 * 275.06840 * 7 6 5 10 10 C 1.53618 * 109.24719 * 178.48782 * 9 7 6 11 11 N 1.46930 * 108.54114 * 54.85366 * 10 9 7 12 12 C 1.34775 * 120.62950 * 126.36825 * 11 10 9 13 13 O 1.21276 * 119.99984 * 179.72080 * 12 11 10 14 14 C 1.50698 * 120.00022 * 359.72558 * 12 11 10 15 15 S 1.80998 * 109.47116 * 179.97438 * 14 12 11 16 16 C 1.76199 * 100.00013 * 179.97438 * 15 14 12 17 17 H 1.07997 * 120.00250 * 0.02562 * 16 15 14 18 18 C 1.38798 * 120.00102 * 179.72368 * 16 15 14 19 19 N 1.31626 * 120.00155 * 0.02562 * 18 16 15 20 20 Si 1.86800 * 120.00292 * 179.97438 * 18 16 15 21 21 H 1.48500 * 109.47210 * 89.99890 * 20 18 16 22 22 H 1.48504 * 109.47424 * 210.00121 * 20 18 16 23 23 H 1.48502 * 109.46888 * 330.00210 * 20 18 16 24 24 C 1.46924 * 118.73842 * 306.09779 * 11 10 9 25 25 C 1.53032 * 109.46081 * 154.99917 * 7 6 5 26 26 H 1.09000 * 109.52593 * 61.42043 * 25 7 6 27 27 C 1.53003 * 109.50014 * 301.33606 * 25 7 6 28 28 C 1.53001 * 109.47353 * 175.16163 * 27 25 7 29 29 H 1.08000 * 120.00025 * 359.97438 * 1 2 3 30 30 H 1.07995 * 119.99891 * 180.02562 * 1 2 3 31 31 H 1.08999 * 109.46859 * 240.00221 * 3 2 1 32 32 H 1.09004 * 109.47133 * 0.02562 * 3 2 1 33 33 H 1.09000 * 109.46562 * 119.99760 * 3 2 1 34 34 H 1.09001 * 109.46970 * 335.00254 * 4 2 1 35 35 H 1.08995 * 109.47506 * 215.00188 * 4 2 1 36 36 H 1.09001 * 109.46844 * 60.00414 * 5 4 2 37 37 H 1.08992 * 109.47289 * 299.99761 * 5 4 2 38 38 H 1.00900 * 110.99996 * 56.04761 * 6 5 4 39 39 H 1.09001 * 109.49716 * 298.56634 * 9 7 6 40 40 H 1.09012 * 109.49817 * 58.62590 * 9 7 6 41 41 H 1.09004 * 109.74298 * 295.12420 * 10 9 7 42 42 H 1.08994 * 109.66972 * 174.54750 * 10 9 7 43 43 H 1.09001 * 109.47434 * 59.99478 * 14 12 11 44 44 H 1.08999 * 109.47072 * 299.99957 * 14 12 11 45 45 H 0.97004 * 120.00604 * 179.97438 * 19 18 16 46 46 H 1.08999 * 109.58423 * 173.64275 * 24 11 10 47 47 H 1.09000 * 109.58943 * 294.06988 * 24 11 10 48 48 H 1.09004 * 109.47102 * 295.16027 * 27 25 7 49 49 H 1.08997 * 109.46890 * 55.16351 * 27 25 7 50 50 H 1.08994 * 109.47061 * 179.97438 * 28 27 25 51 51 H 1.08995 * 109.46991 * 300.00208 * 28 27 25 52 52 H 1.08997 * 109.46969 * 60.00237 * 28 27 25 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 1.3100 0.0000 0.0000 3 6 2.0635 1.3052 0.0000 4 6 2.0636 -1.3050 -0.0006 5 6 2.4274 -1.6832 -1.4378 6 7 3.1614 -2.9557 -1.4384 7 6 3.5286 -3.3510 -2.8047 8 1 3.7588 -2.4612 -3.3907 9 6 2.3599 -4.0984 -3.4508 10 6 2.7350 -4.4762 -4.8918 11 7 3.9936 -5.2338 -4.8636 12 6 4.0803 -6.4433 -5.4518 13 8 5.1263 -7.0565 -5.4261 14 6 2.8775 -7.0337 -6.1415 15 16 3.3093 -8.6521 -6.8273 16 6 1.7668 -9.0986 -7.5525 17 1 0.9232 -8.4278 -7.4832 18 6 1.6375 -10.3096 -8.2183 19 7 2.6671 -11.1247 -8.3076 20 14 0.0020 -10.7832 -8.9866 21 1 -0.0480 -10.2916 -10.3869 22 1 -0.1406 -12.2614 -8.9755 23 1 -1.1057 -10.1732 -8.2080 24 6 5.1575 -4.6451 -4.1874 25 6 4.7567 -4.2630 -2.7590 26 1 4.5201 -5.1646 -2.1940 27 6 5.9151 -3.5263 -2.0834 28 6 7.1037 -4.4772 -1.9292 29 1 -0.5400 0.9353 0.0004 30 1 -0.5400 -0.9353 0.0004 31 1 2.6901 1.3629 -0.8900 32 1 1.3552 2.1337 0.0005 33 1 2.6901 1.3628 0.8900 34 1 1.4386 -2.0856 0.4333 35 1 2.9742 -1.1991 0.5889 36 1 3.0523 -0.9027 -1.8717 37 1 1.5167 -1.7893 -2.0272 38 1 2.6280 -3.6810 -0.9828 39 1 2.1453 -5.0015 -2.8794 40 1 1.4788 -3.4566 -3.4613 41 1 2.8658 -3.5725 -5.4872 42 1 1.9476 -5.0919 -5.3264 43 1 2.5589 -6.3716 -6.9467 44 1 2.0662 -7.1480 -5.4227 45 1 2.5768 -11.9712 -8.7726 46 1 5.9689 -5.3723 -4.1570 47 1 5.4818 -3.7549 -4.7264 48 1 6.2092 -2.6733 -2.6950 49 1 5.5994 -3.1770 -1.1003 50 1 7.9290 -3.9523 -1.4483 51 1 6.8096 -5.3302 -1.3177 52 1 7.4193 -4.8265 -2.9122 RHF calculation, no. of doubly occupied orbitals= 63 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). S: (AM1): M.J.S. DEWAR, Y.-C. YUAN, INORGANIC CHEM., 29, 589 (1990) 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 ZINC001723364417.mol2 52 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 06:10:29 Heat of formation + Delta-G solvation = -39.884811 kcal Electronic energy + Delta-G solvation = -27491.504036 eV Core-core repulsion = 23809.565113 eV Total energy + Delta-G solvation = -3681.938923 eV No. of doubly occupied orbitals = 63 Molecular weight (most abundant/longest-lived isotopes) = 340.193 amu Computer time = 0.53 seconds Orbital eigenvalues (eV) -40.23738 -38.34807 -37.07641 -34.98878 -34.49792 -32.43374 -31.47945 -30.16745 -29.07957 -27.91026 -27.51794 -25.52415 -24.48575 -24.04284 -22.68833 -21.56637 -20.40042 -19.19197 -18.70854 -17.68541 -16.74706 -16.04652 -15.96409 -15.50413 -15.30552 -15.18703 -14.81012 -14.56432 -14.44964 -14.17422 -13.91100 -13.72738 -13.66881 -13.28929 -13.26153 -13.05450 -12.70588 -12.51064 -12.31803 -12.17044 -12.09025 -11.98527 -11.89606 -11.62619 -11.44875 -11.32495 -11.19341 -11.06929 -11.02855 -10.82476 -10.75159 -10.66066 -10.40858 -9.80422 -9.43240 -9.34401 -9.07121 -8.70789 -8.45799 -8.22275 -6.50210 -6.21889 -3.92445 1.81727 2.94743 3.06470 3.21590 3.25565 3.29676 3.59907 3.77769 4.19726 4.37665 4.45602 4.56983 4.58906 4.78391 4.80607 4.87113 4.94580 4.99148 5.05627 5.12591 5.13102 5.20563 5.23194 5.27859 5.29427 5.31459 5.42619 5.47557 5.49478 5.53507 5.55102 5.60647 5.64065 5.69962 5.72240 5.80277 5.83718 5.87197 5.94266 6.00076 6.09891 6.11016 6.22085 6.24657 6.35015 6.47652 6.68486 6.73310 7.05984 7.57435 7.59493 8.34615 8.58190 9.23240 10.85470 Molecular weight = 340.19amu Principal moments of inertia in cm(-1) A = 0.013717 B = 0.002242 C = 0.001971 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2040.754366 B =12488.205905 C =14199.861243 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.198 4.198 2 C -0.124 4.124 3 C -0.120 4.120 4 C -0.084 4.084 5 C 0.066 3.934 6 N -0.682 5.682 7 C 0.095 3.905 8 H 0.078 0.922 9 C -0.165 4.165 10 C 0.113 3.887 11 N -0.620 5.620 12 C 0.535 3.465 13 O -0.516 6.516 14 C -0.150 4.150 15 S -0.061 6.061 16 C -0.535 4.535 17 H 0.072 0.928 18 C 0.073 3.927 19 N -0.867 5.867 20 Si 0.918 3.082 21 H -0.277 1.277 22 H -0.282 1.282 23 H -0.272 1.272 24 C 0.116 3.884 25 C -0.088 4.088 26 H 0.075 0.925 27 C -0.105 4.105 28 C -0.157 4.157 29 H 0.096 0.904 30 H 0.096 0.904 31 H 0.066 0.934 32 H 0.059 0.941 33 H 0.066 0.934 34 H 0.067 0.933 35 H 0.078 0.922 36 H 0.071 0.929 37 H 0.030 0.970 38 H 0.341 0.659 39 H 0.072 0.928 40 H 0.071 0.929 41 H 0.066 0.934 42 H 0.090 0.910 43 H 0.088 0.912 44 H 0.088 0.912 45 H 0.268 0.732 46 H 0.097 0.903 47 H 0.061 0.939 48 H 0.054 0.946 49 H 0.079 0.921 50 H 0.050 0.950 51 H 0.053 0.947 52 H 0.055 0.945 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -0.834 24.361 16.667 29.529 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 -0.234 4.234 2 C -0.124 4.124 3 C -0.176 4.176 4 C -0.122 4.122 5 C -0.063 4.063 6 N -0.312 5.312 7 C -0.015 4.015 8 H 0.096 0.904 9 C -0.205 4.205 10 C -0.012 4.012 11 N -0.356 5.356 12 C 0.323 3.677 13 O -0.391 6.391 14 C -0.301 4.301 15 S 0.166 5.834 16 C -0.683 4.683 17 H 0.090 0.910 18 C -0.136 4.136 19 N -0.502 5.502 20 Si 0.745 3.255 21 H -0.203 1.203 22 H -0.207 1.207 23 H -0.197 1.197 24 C -0.007 4.007 25 C -0.108 4.108 26 H 0.093 0.907 27 C -0.144 4.144 28 C -0.215 4.215 29 H 0.114 0.886 30 H 0.114 0.886 31 H 0.085 0.915 32 H 0.079 0.921 33 H 0.085 0.915 34 H 0.085 0.915 35 H 0.096 0.904 36 H 0.090 0.910 37 H 0.049 0.951 38 H 0.159 0.841 39 H 0.090 0.910 40 H 0.090 0.910 41 H 0.084 0.916 42 H 0.108 0.892 43 H 0.106 0.894 44 H 0.106 0.894 45 H 0.078 0.922 46 H 0.115 0.885 47 H 0.079 0.921 48 H 0.073 0.927 49 H 0.098 0.902 50 H 0.069 0.931 51 H 0.072 0.928 52 H 0.074 0.926 Dipole moment (debyes) X Y Z Total from point charges 1.408 23.564 16.770 28.957 hybrid contribution -3.366 0.170 -0.916 3.492 sum -1.957 23.735 15.854 28.610 Atomic orbital electron populations 1.23744 0.95248 1.01853 1.02596 1.21727 0.95357 0.95788 0.99549 1.20880 1.00235 0.94248 1.02272 1.20629 1.00323 0.94133 0.97131 1.21913 0.96392 0.92174 0.95844 1.60577 1.47741 1.05301 1.17551 1.21575 0.94024 0.97454 0.88466 0.90398 1.22736 0.98974 1.01325 0.97423 1.21698 0.86704 0.96615 0.96139 1.48118 1.11981 1.18827 1.56713 1.20317 0.89895 0.79795 0.77709 1.90687 1.30611 1.59453 1.58318 1.23550 0.98611 1.05420 1.02510 1.85408 1.18056 1.10671 1.69252 1.22852 0.97442 1.07062 1.40974 0.91002 1.24991 0.97679 0.95315 0.95613 1.70016 1.29798 1.10069 1.40335 0.86175 0.82191 0.77774 0.79396 1.20271 1.20736 1.19723 1.21669 0.89227 0.98634 0.91167 1.21517 0.94725 0.98559 0.95981 0.90698 1.21386 0.93815 0.97567 1.01589 1.21857 0.97999 0.99680 1.01921 0.88552 0.88584 0.91506 0.92147 0.91543 0.91476 0.90356 0.91007 0.95140 0.84069 0.90971 0.91048 0.91552 0.89190 0.89376 0.89399 0.92182 0.88491 0.92072 0.92676 0.90222 0.93061 0.92765 0.92571 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 -0.20 -1.25 13.90 29.01 0.40 -0.85 16 2 C -0.12 -0.78 5.31 -101.07 -0.54 -1.32 16 3 C -0.12 -0.64 10.12 36.01 0.36 -0.27 16 4 C -0.08 -0.53 5.64 -27.88 -0.16 -0.68 16 5 C 0.07 0.44 5.47 -3.82 -0.02 0.42 16 6 N -0.68 -5.00 5.34 -106.69 -0.57 -5.57 16 7 C 0.09 0.79 1.89 -67.68 -0.13 0.67 16 8 H 0.08 0.66 7.80 -51.93 -0.40 0.26 16 9 C -0.16 -1.46 5.35 -26.39 -0.14 -1.60 16 10 C 0.11 1.23 6.37 -3.49 -0.02 1.21 16 11 N -0.62 -8.84 2.97 -172.50 -0.51 -9.35 16 12 C 0.53 10.29 7.72 -10.99 -0.08 10.20 16 13 O -0.52 -11.92 15.27 5.56 0.08 -11.84 16 14 C -0.15 -3.08 4.50 36.00 0.16 -2.92 16 15 S -0.06 -1.66 20.57 -107.50 -2.21 -3.87 16 16 C -0.54 -15.26 9.50 30.94 0.29 -14.97 16 17 H 0.07 1.94 7.80 -52.49 -0.41 1.53 16 18 C 0.07 2.10 5.49 -17.43 -0.10 2.00 16 19 N -0.87 -26.19 13.22 55.49 0.73 -25.46 16 20 Si 0.92 21.41 29.55 -169.99 -5.02 16.39 16 21 H -0.28 -6.33 7.11 56.52 0.40 -5.93 16 22 H -0.28 -6.47 7.11 56.52 0.40 -6.07 16 23 H -0.27 -6.16 7.11 56.52 0.40 -5.76 16 24 C 0.12 1.44 5.32 -3.71 -0.02 1.42 16 25 C -0.09 -0.87 2.06 -90.50 -0.19 -1.06 16 26 H 0.07 0.87 8.14 -51.93 -0.42 0.45 16 27 C -0.11 -0.94 5.31 -26.73 -0.14 -1.08 16 28 C -0.16 -1.47 9.67 37.16 0.36 -1.12 16 29 H 0.10 0.54 7.83 -52.49 -0.41 0.13 16 30 H 0.10 0.59 7.99 -52.49 -0.42 0.17 16 31 H 0.07 0.34 8.14 -51.93 -0.42 -0.08 16 32 H 0.06 0.29 7.78 -51.93 -0.40 -0.11 16 33 H 0.07 0.33 8.14 -51.93 -0.42 -0.10 16 34 H 0.07 0.42 7.99 -51.93 -0.41 0.00 16 35 H 0.08 0.51 8.14 -51.93 -0.42 0.09 16 36 H 0.07 0.50 8.05 -51.93 -0.42 0.08 16 37 H 0.03 0.22 7.41 -51.93 -0.38 -0.17 16 38 H 0.34 2.47 8.48 -39.29 -0.33 2.14 16 39 H 0.07 0.72 8.14 -51.93 -0.42 0.29 16 40 H 0.07 0.55 7.42 -51.92 -0.39 0.16 16 41 H 0.07 0.63 8.14 -51.93 -0.42 0.21 16 42 H 0.09 1.02 5.93 -51.93 -0.31 0.71 16 43 H 0.09 1.67 7.93 -51.91 -0.41 1.26 16 44 H 0.09 1.67 7.70 -51.92 -0.40 1.27 16 45 H 0.27 7.53 8.31 -40.82 -0.34 7.19 16 46 H 0.10 1.41 5.72 -51.93 -0.30 1.11 16 47 H 0.06 0.68 8.14 -51.93 -0.42 0.26 16 48 H 0.05 0.47 8.14 -51.93 -0.42 0.05 16 49 H 0.08 0.71 7.42 -51.93 -0.39 0.33 16 50 H 0.05 0.42 8.14 -51.93 -0.42 0.00 16 51 H 0.05 0.53 8.14 -51.93 -0.42 0.11 16 52 H 0.06 0.57 6.70 -51.93 -0.35 0.23 16 LS Contribution 421.57 15.07 6.35 6.35 Total: -1.00 -32.90 421.57 -10.59 -43.49 By element: Atomic # 1 Polarization: 9.30 SS G_CDS: -9.50 Total: -0.19 kcal Atomic # 6 Polarization: -10.00 SS G_CDS: 0.05 Total: -9.95 kcal Atomic # 7 Polarization: -40.03 SS G_CDS: -0.35 Total: -40.38 kcal Atomic # 8 Polarization: -11.92 SS G_CDS: 0.08 Total: -11.84 kcal Atomic # 14 Polarization: 21.41 SS G_CDS: -5.02 Total: 16.39 kcal Atomic # 16 Polarization: -1.66 SS G_CDS: -2.21 Total: -3.87 kcal Total LS contribution 6.35 Total: 6.35 kcal Total: -32.90 -10.59 -43.49 kcal The number of atoms in the molecule is 52 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. ZINC001723364417.mol2 52 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 3.605 kcal (2) G-P(sol) polarization free energy of solvation -32.896 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -29.290 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.594 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.490 kcal (6) G-S(sol) free energy of system = (1) + (5) -39.885 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.53 seconds