Wall clock time and date at job start Sat Apr 11 2020 06:08:32 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 N 2 2 C 1.31634 * 1 3 3 Si 1.86804 * 119.99790 * 2 1 4 4 H 1.48497 * 109.46849 * 179.97438 * 3 2 1 5 5 H 1.48497 * 109.47133 * 299.99520 * 3 2 1 6 6 H 1.48497 * 109.47098 * 59.99757 * 3 2 1 7 7 C 1.38789 * 119.99977 * 179.97438 * 2 1 3 8 8 H 1.08002 * 120.00097 * 180.02562 * 7 2 1 9 9 S 1.76199 * 120.00075 * 0.02562 * 7 2 1 10 10 C 1.81002 * 100.00285 * 180.02562 * 9 7 2 11 11 C 1.50704 * 109.47212 * 180.02562 * 10 9 7 12 12 O 1.21275 * 119.99801 * 0.02562 * 11 10 9 13 13 N 1.34779 * 119.99883 * 179.97438 * 11 10 9 14 14 C 1.46493 * 119.99716 * 180.02562 * 13 11 10 15 15 H 1.09002 * 109.47317 * 35.00272 * 14 13 11 16 16 C 1.53001 * 109.46994 * 154.99940 * 14 13 11 17 17 N 1.46904 * 109.47256 * 305.00127 * 16 14 13 18 18 C 1.46896 * 111.00016 * 179.97438 * 17 16 14 19 19 C 1.53002 * 109.47181 * 179.97438 * 18 17 16 20 20 C 1.52997 * 109.46817 * 65.00049 * 19 18 17 21 21 C 1.52999 * 109.47317 * 179.97438 * 20 19 18 22 22 C 1.53005 * 109.47159 * 300.00546 * 21 20 19 23 23 C 1.52997 * 109.47452 * 59.99536 * 22 21 20 24 24 C 1.53000 * 109.47233 * 184.99855 * 19 18 17 25 25 C 1.53002 * 109.47349 * 274.99693 * 14 13 11 26 26 C 1.52999 * 117.49843 * 128.74861 * 25 14 13 27 27 C 1.52999 * 117.49471 * 60.09203 * 25 14 13 28 28 H 0.97002 * 120.00315 * 0.02562 * 1 2 3 29 29 H 1.09002 * 109.46743 * 60.00257 * 10 9 7 30 30 H 1.09003 * 109.47096 * 300.00002 * 10 9 7 31 31 H 0.97002 * 119.99581 * 359.97438 * 13 11 10 32 32 H 1.08998 * 109.47638 * 184.99871 * 16 14 13 33 33 H 1.09003 * 109.46856 * 64.99832 * 16 14 13 34 34 H 1.00896 * 110.99668 * 303.95167 * 17 16 14 35 35 H 1.09008 * 109.47165 * 59.99956 * 18 17 16 36 36 H 1.08997 * 109.47437 * 299.99850 * 18 17 16 37 37 H 1.09002 * 109.47070 * 305.00230 * 19 18 17 38 38 H 1.08996 * 109.47853 * 300.00202 * 20 19 18 39 39 H 1.09002 * 109.47153 * 60.00231 * 20 19 18 40 40 H 1.09000 * 109.47486 * 180.02562 * 21 20 19 41 41 H 1.09002 * 109.46716 * 60.00091 * 21 20 19 42 42 H 1.09002 * 109.46935 * 299.99411 * 22 21 20 43 43 H 1.09001 * 109.46812 * 179.97438 * 22 21 20 44 44 H 1.08993 * 109.47194 * 179.97438 * 23 22 21 45 45 H 1.09002 * 109.46695 * 59.99734 * 23 22 21 46 46 H 1.08992 * 109.47399 * 300.00166 * 24 19 18 47 47 H 1.09004 * 109.46724 * 60.00652 * 24 19 18 48 48 H 1.08994 * 115.55148 * 274.42188 * 25 14 13 49 49 H 1.09001 * 117.49727 * 0.02562 * 26 25 14 50 50 H 1.08992 * 117.49772 * 145.02188 * 26 25 14 51 51 H 1.08999 * 117.49976 * 214.98374 * 27 25 14 52 52 H 1.09003 * 117.49805 * 359.97438 * 27 25 14 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 7 0.0000 0.0000 0.0000 2 6 1.3163 0.0000 0.0000 3 14 2.2503 1.6178 0.0000 4 1 3.7103 1.3464 0.0006 5 1 1.8916 2.3964 -1.2125 6 1 1.8915 2.3965 1.2124 7 6 2.0103 -1.2020 0.0005 8 1 3.0903 -1.2020 0.0010 9 16 1.1293 -2.7279 0.0005 10 6 2.5158 -3.8914 0.0021 11 6 1.9873 -5.3027 0.0017 12 8 0.7911 -5.5022 0.0000 13 7 2.8441 -6.3432 0.0022 14 6 2.3303 -7.7150 0.0012 15 1 1.4151 -7.7599 -0.5892 16 6 3.3763 -8.6509 -0.6077 17 7 3.7507 -8.1647 -1.9424 18 6 4.7562 -9.0403 -2.5588 19 6 5.1196 -8.5032 -3.9446 20 6 5.8022 -7.1415 -3.8008 21 6 6.1662 -6.6046 -5.1865 22 6 7.1185 -7.5821 -5.8783 23 6 6.4358 -8.9438 -6.0221 24 6 6.0717 -9.4805 -4.6369 25 6 2.0323 -8.1491 1.4378 26 6 0.6499 -8.7382 1.7255 27 6 1.0024 -7.3341 2.2228 28 1 -0.4851 0.8400 -0.0004 29 1 3.1237 -3.7309 0.8926 30 1 3.1251 -3.7317 -0.8875 31 1 3.8008 -6.1835 0.0025 32 1 2.9612 -9.6554 -0.6902 33 1 4.2591 -8.6740 0.0314 34 1 2.9389 -8.0729 -2.5345 35 1 4.3509 -10.0477 -2.6548 36 1 5.6484 -9.0658 -1.9332 37 1 4.2137 -8.3943 -4.5411 38 1 5.1240 -6.4452 -3.3076 39 1 6.7080 -7.2504 -3.2043 40 1 6.6529 -5.6347 -5.0840 41 1 5.2606 -6.4958 -5.7833 42 1 8.0241 -7.6909 -5.2814 43 1 7.3774 -7.1997 -6.8656 44 1 7.1141 -9.6400 -6.5153 45 1 5.5302 -8.8349 -6.6189 46 1 6.9775 -9.5893 -4.0404 47 1 5.5853 -10.4506 -4.7393 48 1 2.8783 -8.5574 1.9906 49 1 -0.0472 -8.8169 0.8911 50 1 0.5864 -9.5338 2.4677 51 1 1.1707 -7.2065 3.2921 52 1 0.5376 -6.4885 1.7158 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 ZINC001569293658.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 06:08:32 Heat of formation + Delta-G solvation = -45.141010 kcal Electronic energy + Delta-G solvation = -27501.404633 eV Core-core repulsion = 23819.237785 eV Total energy + Delta-G solvation = -3682.166849 eV No. of doubly occupied orbitals = 63 Molecular weight (most abundant/longest-lived isotopes) = 340.193 amu Computer time = 0.62 seconds Orbital eigenvalues (eV) -39.73273 -39.02621 -37.21723 -35.96364 -33.75124 -32.38653 -31.70613 -30.93636 -29.62515 -27.75885 -25.44717 -24.93154 -22.92829 -22.40000 -22.11967 -21.42015 -20.64619 -20.08071 -19.91802 -17.75562 -16.57547 -16.37951 -15.82045 -15.59214 -15.17449 -15.06800 -14.78900 -14.76758 -14.41958 -14.27358 -14.12242 -13.78472 -13.64149 -13.23215 -12.97832 -12.61559 -12.47466 -12.37542 -12.17039 -12.00803 -11.95155 -11.65048 -11.38538 -11.33895 -11.16794 -11.15459 -11.03424 -10.96515 -10.72401 -10.65927 -10.32108 -10.26710 -10.24212 -10.04506 -9.74213 -9.23579 -9.03428 -8.63964 -8.62017 -8.16886 -6.43821 -6.17836 -3.87072 3.09993 3.19968 3.24250 3.31023 3.35890 3.67056 3.85644 4.11401 4.24803 4.39221 4.52112 4.55409 4.64623 4.86047 4.93324 4.99813 5.06414 5.11880 5.14799 5.17494 5.20522 5.22897 5.28694 5.29987 5.32604 5.34361 5.42050 5.46100 5.46627 5.51764 5.66309 5.72242 5.74427 5.81155 5.90085 5.91011 5.93678 5.97866 6.00110 6.09509 6.10322 6.21057 6.24521 6.27167 6.30068 6.57784 6.71762 6.86108 7.13430 7.64229 7.92879 8.39817 8.77981 9.27933 10.89620 Molecular weight = 340.19amu Principal moments of inertia in cm(-1) A = 0.007977 B = 0.002925 C = 0.002208 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 3509.158379 B = 9570.043516 C =12676.403366 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 N -0.868 5.868 2 C 0.073 3.927 3 Si 0.917 3.083 4 H -0.272 1.272 5 H -0.280 1.280 6 H -0.280 1.280 7 C -0.533 4.533 8 H 0.072 0.928 9 S -0.061 6.061 10 C -0.152 4.152 11 C 0.536 3.464 12 O -0.523 6.523 13 N -0.715 5.715 14 C 0.181 3.819 15 H 0.085 0.915 16 C 0.056 3.944 17 N -0.684 5.684 18 C 0.065 3.935 19 C -0.084 4.084 20 C -0.106 4.106 21 C -0.123 4.123 22 C -0.120 4.120 23 C -0.118 4.118 24 C -0.113 4.113 25 C -0.172 4.172 26 C -0.175 4.175 27 C -0.176 4.176 28 H 0.267 0.733 29 H 0.087 0.913 30 H 0.088 0.912 31 H 0.400 0.600 32 H 0.042 0.958 33 H 0.076 0.924 34 H 0.344 0.656 35 H 0.026 0.974 36 H 0.071 0.929 37 H 0.068 0.932 38 H 0.077 0.923 39 H 0.056 0.944 40 H 0.061 0.939 41 H 0.060 0.940 42 H 0.059 0.941 43 H 0.057 0.943 44 H 0.058 0.942 45 H 0.060 0.940 46 H 0.061 0.939 47 H 0.058 0.942 48 H 0.100 0.900 49 H 0.093 0.907 50 H 0.088 0.912 51 H 0.086 0.914 52 H 0.125 0.875 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 13.178 -22.393 -6.086 26.686 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 N -0.504 5.504 2 C -0.136 4.136 3 Si 0.744 3.256 4 H -0.196 1.196 5 H -0.206 1.206 6 H -0.206 1.206 7 C -0.681 4.681 8 H 0.090 0.910 9 S 0.166 5.834 10 C -0.302 4.302 11 C 0.323 3.677 12 O -0.399 6.399 13 N -0.367 5.367 14 C 0.076 3.924 15 H 0.103 0.897 16 C -0.074 4.074 17 N -0.315 5.315 18 C -0.064 4.064 19 C -0.103 4.103 20 C -0.143 4.143 21 C -0.160 4.160 22 C -0.157 4.157 23 C -0.156 4.156 24 C -0.151 4.151 25 C -0.192 4.192 26 C -0.212 4.212 27 C -0.213 4.213 28 H 0.077 0.923 29 H 0.105 0.895 30 H 0.107 0.893 31 H 0.234 0.766 32 H 0.061 0.939 33 H 0.095 0.905 34 H 0.162 0.838 35 H 0.044 0.956 36 H 0.089 0.911 37 H 0.086 0.914 38 H 0.096 0.904 39 H 0.075 0.925 40 H 0.080 0.920 41 H 0.079 0.921 42 H 0.078 0.922 43 H 0.076 0.924 44 H 0.077 0.923 45 H 0.079 0.921 46 H 0.080 0.920 47 H 0.076 0.924 48 H 0.118 0.882 49 H 0.111 0.889 50 H 0.107 0.893 51 H 0.104 0.896 52 H 0.143 0.857 Dipole moment (debyes) X Y Z Total from point charges 11.501 -22.177 -5.858 25.659 hybrid contribution 1.956 0.491 -0.142 2.022 sum 13.457 -21.686 -6.000 26.218 Atomic orbital electron populations 1.70032 1.05923 1.27241 1.47199 1.24982 0.95009 0.98987 0.94651 0.86137 0.79637 0.82002 0.77851 1.19616 1.20606 1.20629 1.22915 0.94932 0.91746 1.58494 0.90961 1.85337 1.05130 0.96279 1.96687 1.23513 1.06351 0.95624 1.04759 1.20203 0.86539 0.86235 0.74715 1.90613 1.15484 1.85504 1.48259 1.45817 1.09931 1.04461 1.76524 1.20370 0.97042 0.81673 0.93360 0.89733 1.22192 0.98321 0.95977 0.90866 1.60368 1.16257 1.51083 1.03756 1.22007 0.95802 0.93407 0.95225 1.21156 0.98547 0.95684 0.94912 1.21473 1.00373 0.96153 0.96306 1.21573 0.99330 0.98338 0.96810 1.21546 0.98577 0.95315 1.00305 1.21501 1.00443 0.96764 0.96878 1.21536 0.99317 0.98024 0.96238 1.22634 0.93317 1.06078 0.97211 1.22905 0.97437 0.97341 1.03534 1.23335 1.02077 0.96154 0.99741 0.92320 0.89514 0.89342 0.76552 0.93946 0.90543 0.83799 0.95553 0.91098 0.91350 0.90421 0.92492 0.92048 0.92120 0.92203 0.92383 0.92309 0.92095 0.92016 0.92365 0.88238 0.88876 0.89338 0.89578 0.85684 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 N -0.87 -26.31 13.22 55.49 0.73 -25.58 16 2 C 0.07 2.09 5.49 -17.43 -0.10 1.99 16 3 Si 0.92 21.58 29.55 -169.99 -5.02 16.55 16 4 H -0.27 -6.20 7.11 56.52 0.40 -5.79 16 5 H -0.28 -6.48 7.11 56.52 0.40 -6.08 16 6 H -0.28 -6.49 7.11 56.52 0.40 -6.09 16 7 C -0.53 -15.25 9.50 30.94 0.29 -14.96 16 8 H 0.07 1.98 7.80 -52.49 -0.41 1.57 16 9 S -0.06 -1.65 20.57 -107.50 -2.21 -3.86 16 10 C -0.15 -3.08 6.16 36.01 0.22 -2.85 16 11 C 0.54 9.74 7.18 -10.98 -0.08 9.66 16 12 O -0.52 -11.24 12.89 5.56 0.07 -11.17 16 13 N -0.71 -9.44 4.78 -53.81 -0.26 -9.70 16 14 C 0.18 2.07 2.51 -67.93 -0.17 1.90 16 15 H 0.08 1.15 7.34 -51.93 -0.38 0.77 16 16 C 0.06 0.48 5.23 -3.82 -0.02 0.46 16 17 N -0.68 -5.90 5.68 -113.78 -0.65 -6.54 16 18 C 0.06 0.48 5.07 -3.83 -0.02 0.46 16 19 C -0.08 -0.64 2.33 -90.62 -0.21 -0.85 16 20 C -0.11 -0.91 5.09 -26.73 -0.14 -1.05 16 21 C -0.12 -1.04 5.92 -26.73 -0.16 -1.19 16 22 C -0.12 -0.88 5.92 -26.73 -0.16 -1.04 16 23 C -0.12 -0.80 5.92 -26.76 -0.16 -0.96 16 24 C -0.11 -0.76 5.20 -26.76 -0.14 -0.90 16 25 C -0.17 -1.96 5.36 -90.62 -0.49 -2.44 16 26 C -0.17 -1.99 10.18 -26.70 -0.27 -2.27 16 27 C -0.18 -2.46 9.74 -26.70 -0.26 -2.72 16 28 H 0.27 7.51 8.31 -40.82 -0.34 7.17 16 29 H 0.09 1.65 8.14 -51.92 -0.42 1.23 16 30 H 0.09 1.69 8.14 -51.91 -0.42 1.27 16 31 H 0.40 4.59 8.60 -40.82 -0.35 4.24 16 32 H 0.04 0.34 8.14 -51.93 -0.42 -0.09 16 33 H 0.08 0.61 8.14 -51.93 -0.42 0.19 16 34 H 0.34 3.19 8.73 -39.29 -0.34 2.85 16 35 H 0.03 0.19 8.14 -51.92 -0.42 -0.23 16 36 H 0.07 0.53 8.14 -51.93 -0.42 0.11 16 37 H 0.07 0.57 8.14 -51.93 -0.42 0.15 16 38 H 0.08 0.80 7.75 -51.93 -0.40 0.40 16 39 H 0.06 0.49 8.14 -51.93 -0.42 0.07 16 40 H 0.06 0.53 8.14 -51.93 -0.42 0.11 16 41 H 0.06 0.54 8.14 -51.93 -0.42 0.12 16 42 H 0.06 0.43 8.14 -51.93 -0.42 0.01 16 43 H 0.06 0.40 8.14 -51.93 -0.42 -0.02 16 44 H 0.06 0.36 8.14 -51.93 -0.42 -0.06 16 45 H 0.06 0.43 8.14 -51.93 -0.42 0.01 16 46 H 0.06 0.41 8.14 -51.93 -0.42 -0.01 16 47 H 0.06 0.36 8.14 -51.93 -0.42 -0.06 16 48 H 0.10 0.99 8.11 -51.93 -0.42 0.57 16 49 H 0.09 1.10 8.05 -51.93 -0.42 0.68 16 50 H 0.09 0.86 8.14 -51.93 -0.42 0.43 16 51 H 0.09 1.12 8.14 -51.93 -0.42 0.70 16 52 H 0.13 2.23 5.02 -51.93 -0.26 1.97 16 LS Contribution 421.10 15.07 6.35 6.35 Total: -1.00 -31.97 421.10 -12.57 -44.54 By element: Atomic # 1 Polarization: 15.90 SS G_CDS: -9.73 Total: 6.17 kcal Atomic # 6 Polarization: -14.91 SS G_CDS: -1.85 Total: -16.75 kcal Atomic # 7 Polarization: -41.65 SS G_CDS: -0.17 Total: -41.82 kcal Atomic # 8 Polarization: -11.24 SS G_CDS: 0.07 Total: -11.17 kcal Atomic # 14 Polarization: 21.58 SS G_CDS: -5.02 Total: 16.55 kcal Atomic # 16 Polarization: -1.65 SS G_CDS: -2.21 Total: -3.86 kcal Total LS contribution 6.35 Total: 6.35 kcal Total: -31.97 -12.57 -44.54 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. ZINC001569293658.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 -0.603 kcal (2) G-P(sol) polarization free energy of solvation -31.971 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -32.574 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -12.567 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.538 kcal (6) G-S(sol) free energy of system = (1) + (5) -45.141 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.62 seconds