Wall clock time and date at job start Sat Apr 11 2020 06:08:10 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 1.30994 * 1 3 3 C 1.50703 * 120.00074 * 2 1 4 4 C 1.50700 * 120.00231 * 179.97438 * 2 1 3 5 5 C 1.53006 * 109.46915 * 94.99753 * 4 2 1 6 6 N 1.46900 * 109.46837 * 180.02562 * 5 4 2 7 7 C 1.46902 * 110.99629 * 180.02562 * 6 5 4 8 8 H 1.08998 * 109.47027 * 324.99842 * 7 6 5 9 9 C 1.53001 * 109.47334 * 85.00371 * 7 6 5 10 10 C 1.53002 * 109.46693 * 205.00170 * 7 6 5 11 11 H 1.09002 * 109.49932 * 300.06125 * 10 7 6 12 12 C 1.53042 * 109.49519 * 180.02562 * 10 7 6 13 13 C 1.53039 * 109.53769 * 178.68058 * 12 10 7 14 14 C 1.53194 * 109.31305 * 61.36700 * 13 12 10 15 15 N 1.46929 * 108.77246 * 305.36475 * 14 13 12 16 16 C 1.34781 * 120.62863 * 233.60712 * 15 14 13 17 17 O 1.21279 * 120.00177 * 180.02562 * 16 15 14 18 18 C 1.50698 * 119.99826 * 0.02562 * 16 15 14 19 19 S 1.81007 * 109.46763 * 180.02562 * 18 16 15 20 20 C 1.76208 * 99.99799 * 180.02562 * 19 18 16 21 21 H 1.07994 * 119.99811 * 359.97438 * 20 19 18 22 22 C 1.38799 * 119.99810 * 180.02562 * 20 19 18 23 23 N 1.31627 * 120.00069 * 359.97438 * 22 20 19 24 24 Si 1.86796 * 119.99762 * 179.97438 * 22 20 19 25 25 H 1.48501 * 109.47566 * 359.97438 * 24 22 20 26 26 H 1.48504 * 109.47031 * 119.99952 * 24 22 20 27 27 H 1.48505 * 109.47045 * 239.99704 * 24 22 20 28 28 C 1.46918 * 118.74140 * 53.60848 * 15 14 13 29 29 H 1.07996 * 120.00160 * 359.97438 * 1 2 3 30 30 H 1.08007 * 120.00353 * 179.97438 * 1 2 3 31 31 H 1.09002 * 109.47152 * 269.99911 * 3 2 1 32 32 H 1.09001 * 109.46980 * 150.00011 * 3 2 1 33 33 H 1.09004 * 109.47113 * 29.99992 * 3 2 1 34 34 H 1.08999 * 109.47609 * 215.00136 * 4 2 1 35 35 H 1.09006 * 109.47060 * 335.00619 * 4 2 1 36 36 H 1.08995 * 109.46884 * 300.00289 * 5 4 2 37 37 H 1.09000 * 109.46938 * 60.00759 * 5 4 2 38 38 H 1.00897 * 111.00103 * 303.96006 * 6 5 4 39 39 H 1.08996 * 109.46600 * 300.00036 * 9 7 6 40 40 H 1.08996 * 109.46819 * 59.99462 * 9 7 6 41 41 H 1.08996 * 109.47249 * 179.97438 * 9 7 6 42 42 H 1.08998 * 109.46281 * 298.70443 * 12 10 7 43 43 H 1.09001 * 109.46161 * 58.67668 * 12 10 7 44 44 H 1.09007 * 109.49835 * 181.31544 * 13 12 10 45 45 H 1.09000 * 109.50269 * 301.38351 * 13 12 10 46 46 H 1.08999 * 109.59081 * 65.15092 * 14 13 12 47 47 H 1.08997 * 109.58689 * 185.43421 * 14 13 12 48 48 H 1.09005 * 109.47479 * 299.99836 * 18 16 15 49 49 H 1.08991 * 109.47714 * 60.00196 * 18 16 15 50 50 H 0.97005 * 120.00015 * 180.02562 * 23 22 20 51 51 H 1.09000 * 109.58986 * 186.60177 * 28 15 14 52 52 H 1.09003 * 109.58576 * 66.17848 * 28 15 14 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 1.3099 0.0000 0.0000 3 6 2.0635 1.3051 0.0000 4 6 2.0635 -1.3051 0.0006 5 6 2.4273 -1.6845 -1.4363 6 7 3.1613 -2.9570 -1.4358 7 6 3.5285 -3.3534 -2.8018 8 1 2.7409 -3.0510 -3.4920 9 6 4.8408 -2.6722 -3.1953 10 6 3.7042 -4.8721 -2.8622 11 1 4.4909 -5.1751 -2.1713 12 6 4.0874 -5.2857 -4.2850 13 6 4.2955 -6.8010 -4.3390 14 6 2.9872 -7.5056 -3.9664 15 7 2.5354 -7.0046 -2.6611 16 6 2.2602 -7.8589 -1.6556 17 8 1.8876 -7.4329 -0.5829 18 6 2.4155 -9.3432 -1.8641 19 16 1.9731 -10.2159 -0.3413 20 6 2.2387 -11.8806 -0.8545 21 1 2.5767 -12.0886 -1.8589 22 6 2.0125 -12.9245 0.0319 23 7 1.6001 -12.6709 1.2559 24 14 2.2934 -14.6892 -0.5124 25 1 2.7522 -14.7047 -1.9246 26 1 3.3268 -15.3150 0.3512 27 1 1.0239 -15.4510 -0.3965 28 6 2.3893 -5.5549 -2.4729 29 1 -0.5400 0.9353 0.0004 30 1 -0.5401 -0.9353 -0.0004 31 1 2.2452 1.6198 -1.0277 32 1 3.0159 1.1747 0.5138 33 1 1.4744 2.0648 0.5139 34 1 2.9742 -1.1986 0.5900 35 1 1.4385 -2.0853 0.4352 36 1 1.5166 -1.7910 -2.0256 37 1 3.0523 -0.9044 -1.8709 38 1 3.9764 -2.9040 -0.8435 39 1 4.7156 -1.5903 -3.1522 40 1 5.6283 -2.9746 -2.5051 41 1 5.1135 -2.9667 -4.2087 42 1 3.2898 -5.0040 -4.9724 43 1 5.0101 -4.7822 -4.5735 44 1 4.5911 -7.0920 -5.3470 45 1 5.0764 -7.0864 -3.6341 46 1 2.2300 -7.2935 -4.7212 47 1 3.1549 -8.5811 -3.9093 48 1 1.7593 -9.6673 -2.6719 49 1 3.4499 -9.5674 -2.1243 50 1 1.4423 -13.4005 1.8754 51 1 2.1630 -5.3430 -1.4279 52 1 1.5833 -5.1837 -3.1060 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 ZINC001271623930.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 06:08:10 Heat of formation + Delta-G solvation = -38.761965 kcal Electronic energy + Delta-G solvation = -27394.481173 eV Core-core repulsion = 23712.590940 eV Total energy + Delta-G solvation = -3681.890233 eV No. of doubly occupied orbitals = 63 Molecular weight (most abundant/longest-lived isotopes) = 340.193 amu Computer time = 0.65 seconds Orbital eigenvalues (eV) -40.02440 -38.34647 -37.10277 -35.80463 -33.13356 -32.39415 -31.63615 -30.39259 -28.62947 -27.99076 -27.45310 -25.50346 -25.06678 -23.64434 -22.74808 -21.61004 -20.29776 -18.89444 -18.59104 -17.59820 -16.62211 -16.07543 -15.70561 -15.45620 -15.33237 -14.88019 -14.77486 -14.64851 -14.56991 -14.16782 -13.85328 -13.75909 -13.58482 -13.24077 -13.13442 -13.02556 -12.83102 -12.57534 -12.50127 -12.15836 -11.99816 -11.88964 -11.69425 -11.67294 -11.30637 -11.18259 -11.13439 -11.04912 -10.97845 -10.83267 -10.72646 -10.67617 -10.42193 -9.74874 -9.32026 -9.20563 -9.04093 -8.61638 -8.32831 -8.16130 -6.45030 -6.18153 -3.87957 1.93446 3.04744 3.18611 3.23644 3.29532 3.33985 3.68560 3.81250 4.23664 4.48508 4.58484 4.61289 4.69703 4.76587 4.82276 4.92406 4.93897 5.02537 5.06349 5.11836 5.16839 5.19385 5.25185 5.29407 5.32440 5.36010 5.43952 5.51084 5.52729 5.59288 5.62104 5.65547 5.68495 5.72616 5.74385 5.77413 5.82353 5.87691 5.93297 5.99916 6.00854 6.18333 6.28171 6.33738 6.37098 6.58821 6.79533 6.84176 7.15903 7.63110 7.72483 8.38917 8.70885 9.27122 10.89295 Molecular weight = 340.19amu Principal moments of inertia in cm(-1) A = 0.014467 B = 0.002202 C = 0.001963 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1934.989465 B =12710.093964 C =14257.347379 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.194 4.194 2 C -0.127 4.127 3 C -0.119 4.119 4 C -0.086 4.086 5 C 0.069 3.931 6 N -0.683 5.683 7 C 0.092 3.908 8 H 0.077 0.923 9 C -0.183 4.183 10 C -0.089 4.089 11 H 0.075 0.925 12 C -0.115 4.115 13 C -0.134 4.134 14 C 0.107 3.893 15 N -0.621 5.621 16 C 0.534 3.466 17 O -0.515 6.515 18 C -0.150 4.150 19 S -0.062 6.062 20 C -0.534 4.534 21 H 0.072 0.928 22 C 0.073 3.927 23 N -0.867 5.867 24 Si 0.918 3.082 25 H -0.272 1.272 26 H -0.280 1.280 27 H -0.280 1.280 28 C 0.129 3.871 29 H 0.095 0.905 30 H 0.100 0.900 31 H 0.064 0.936 32 H 0.061 0.939 33 H 0.061 0.939 34 H 0.067 0.933 35 H 0.081 0.919 36 H 0.071 0.929 37 H 0.027 0.973 38 H 0.342 0.658 39 H 0.052 0.948 40 H 0.058 0.942 41 H 0.065 0.935 42 H 0.062 0.938 43 H 0.065 0.935 44 H 0.073 0.927 45 H 0.068 0.932 46 H 0.064 0.936 47 H 0.088 0.912 48 H 0.087 0.913 49 H 0.087 0.913 50 H 0.267 0.733 51 H 0.105 0.895 52 H 0.054 0.946 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 5.293 25.451 -12.094 28.671 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 -0.230 4.230 2 C -0.127 4.127 3 C -0.176 4.176 4 C -0.124 4.124 5 C -0.060 4.060 6 N -0.313 5.313 7 C -0.018 4.018 8 H 0.096 0.904 9 C -0.242 4.242 10 C -0.109 4.109 11 H 0.093 0.907 12 C -0.153 4.153 13 C -0.173 4.173 14 C -0.017 4.017 15 N -0.357 5.357 16 C 0.322 3.678 17 O -0.390 6.390 18 C -0.301 4.301 19 S 0.165 5.835 20 C -0.682 4.682 21 H 0.091 0.909 22 C -0.137 4.137 23 N -0.503 5.503 24 Si 0.745 3.255 25 H -0.196 1.196 26 H -0.206 1.206 27 H -0.206 1.206 28 C 0.006 3.994 29 H 0.113 0.887 30 H 0.118 0.882 31 H 0.083 0.917 32 H 0.080 0.920 33 H 0.080 0.920 34 H 0.086 0.914 35 H 0.100 0.900 36 H 0.090 0.910 37 H 0.046 0.954 38 H 0.161 0.839 39 H 0.071 0.929 40 H 0.077 0.923 41 H 0.084 0.916 42 H 0.081 0.919 43 H 0.083 0.917 44 H 0.091 0.909 45 H 0.087 0.913 46 H 0.082 0.918 47 H 0.106 0.894 48 H 0.106 0.894 49 H 0.106 0.894 50 H 0.077 0.923 51 H 0.123 0.877 52 H 0.072 0.928 Dipole moment (debyes) X Y Z Total from point charges 4.096 25.615 -10.297 27.910 hybrid contribution 1.383 -0.981 -1.911 2.555 sum 5.480 24.634 -12.208 28.034 Atomic orbital electron populations 1.23750 0.95295 1.01989 1.02015 1.21705 0.95451 0.95565 1.00023 1.20868 1.00138 0.94698 1.01878 1.20686 1.00422 0.94493 0.96799 1.21897 0.98105 0.89568 0.96458 1.60522 1.29166 1.31473 1.10184 1.21519 0.95936 0.94370 0.89978 0.90438 1.22541 0.98631 1.00383 1.02631 1.21495 0.98934 0.93541 0.96939 0.90689 1.21634 1.01458 0.95807 0.96443 1.21911 0.97987 0.95480 1.01889 1.21688 0.95479 0.99587 0.84940 1.48131 1.68534 1.06576 1.12449 1.20279 0.76277 0.88029 0.83256 1.90691 1.44784 1.78583 1.24893 1.23551 1.04693 0.94336 1.07478 1.85409 1.87636 1.00672 1.09795 1.22909 1.52409 0.91492 1.01379 0.90947 1.24992 0.94663 0.99448 0.94549 1.70033 1.42930 1.32585 1.04720 0.86127 0.78030 0.82703 0.78687 1.19636 1.20598 1.20595 1.21422 0.95297 0.78551 1.04084 0.88663 0.88172 0.91695 0.91960 0.91958 0.91434 0.90038 0.91029 0.95430 0.83929 0.92928 0.92300 0.91578 0.91912 0.91655 0.90868 0.91339 0.91773 0.89412 0.89449 0.89437 0.92283 0.87689 0.92755 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 -0.19 -1.53 13.89 29.02 0.40 -1.12 16 2 C -0.13 -0.99 5.31 -101.06 -0.54 -1.52 16 3 C -0.12 -0.74 10.03 36.01 0.36 -0.38 16 4 C -0.09 -0.71 5.64 -27.88 -0.16 -0.87 16 5 C 0.07 0.55 5.47 -3.82 -0.02 0.53 16 6 N -0.68 -6.07 5.61 -106.72 -0.60 -6.67 16 7 C 0.09 0.75 2.17 -67.71 -0.15 0.61 16 8 H 0.08 0.64 7.80 -51.93 -0.40 0.23 16 9 C -0.18 -1.22 8.81 37.16 0.33 -0.89 16 10 C -0.09 -0.89 2.11 -90.50 -0.19 -1.08 16 11 H 0.07 0.87 8.14 -51.93 -0.42 0.45 16 12 C -0.12 -0.95 4.85 -26.69 -0.13 -1.08 16 13 C -0.13 -1.24 6.08 -26.61 -0.16 -1.40 16 14 C 0.11 1.22 6.34 -3.71 -0.02 1.20 16 15 N -0.62 -9.32 2.97 -172.77 -0.51 -9.83 16 16 C 0.53 10.64 7.72 -10.98 -0.08 10.55 16 17 O -0.52 -12.28 15.27 5.56 0.08 -12.20 16 18 C -0.15 -3.15 4.50 36.00 0.16 -2.99 16 19 S -0.06 -1.72 20.57 -107.50 -2.21 -3.93 16 20 C -0.53 -15.40 9.50 30.94 0.29 -15.11 16 21 H 0.07 1.98 7.80 -52.49 -0.41 1.57 16 22 C 0.07 2.10 5.49 -17.43 -0.10 2.00 16 23 N -0.87 -26.45 13.22 55.49 0.73 -25.72 16 24 Si 0.92 21.62 29.55 -169.99 -5.02 16.59 16 25 H -0.27 -6.19 7.11 56.52 0.40 -5.79 16 26 H -0.28 -6.49 7.11 56.52 0.40 -6.08 16 27 H -0.28 -6.49 7.11 56.52 0.40 -6.09 16 28 C 0.13 1.70 5.47 -3.71 -0.02 1.68 16 29 H 0.10 0.65 8.04 -52.49 -0.42 0.23 16 30 H 0.10 0.82 7.99 -52.48 -0.42 0.40 16 31 H 0.06 0.37 8.14 -51.93 -0.42 -0.05 16 32 H 0.06 0.36 8.08 -51.93 -0.42 -0.06 16 33 H 0.06 0.35 8.06 -51.93 -0.42 -0.06 16 34 H 0.07 0.52 8.10 -51.93 -0.42 0.10 16 35 H 0.08 0.80 7.99 -51.93 -0.41 0.38 16 36 H 0.07 0.62 8.06 -51.93 -0.42 0.20 16 37 H 0.03 0.20 7.44 -51.93 -0.39 -0.18 16 38 H 0.34 2.89 8.47 -39.29 -0.33 2.56 16 39 H 0.05 0.34 7.45 -51.93 -0.39 -0.05 16 40 H 0.06 0.41 8.13 -51.93 -0.42 -0.02 16 41 H 0.07 0.41 6.40 -51.93 -0.33 0.07 16 42 H 0.06 0.49 8.14 -51.93 -0.42 0.06 16 43 H 0.06 0.46 6.36 -51.93 -0.33 0.13 16 44 H 0.07 0.54 8.14 -51.93 -0.42 0.12 16 45 H 0.07 0.71 8.14 -51.93 -0.42 0.28 16 46 H 0.06 0.65 8.14 -51.93 -0.42 0.22 16 47 H 0.09 1.04 5.95 -51.93 -0.31 0.73 16 48 H 0.09 1.71 7.94 -51.91 -0.41 1.30 16 49 H 0.09 1.71 7.70 -51.92 -0.40 1.31 16 50 H 0.27 7.55 8.31 -40.82 -0.34 7.21 16 51 H 0.10 1.69 6.66 -51.93 -0.35 1.34 16 52 H 0.05 0.67 8.14 -51.93 -0.42 0.25 16 LS Contribution 421.61 15.07 6.35 6.35 Total: -1.00 -33.81 421.61 -10.69 -44.51 By element: Atomic # 1 Polarization: 10.27 SS G_CDS: -9.50 Total: 0.77 kcal Atomic # 6 Polarization: -9.86 SS G_CDS: -0.02 Total: -9.88 kcal Atomic # 7 Polarization: -41.84 SS G_CDS: -0.38 Total: -42.22 kcal Atomic # 8 Polarization: -12.28 SS G_CDS: 0.08 Total: -12.20 kcal Atomic # 14 Polarization: 21.62 SS G_CDS: -5.02 Total: 16.59 kcal Atomic # 16 Polarization: -1.72 SS G_CDS: -2.21 Total: -3.93 kcal Total LS contribution 6.35 Total: 6.35 kcal Total: -33.81 -10.69 -44.51 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. ZINC001271623930.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 5.744 kcal (2) G-P(sol) polarization free energy of solvation -33.811 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -28.068 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.694 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.506 kcal (6) G-S(sol) free energy of system = (1) + (5) -38.762 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.65 seconds