Wall clock time and date at job start Tue Mar 31 2020 21:01:10 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 1.53004 * 1 3 3 H 1.08998 * 109.47924 * 2 1 4 4 C 1.53090 * 109.47672 * 120.02213 * 2 1 3 5 5 C 1.53182 * 109.16032 * 177.60265 * 4 2 1 6 6 H 1.08998 * 109.54307 * 183.05824 * 5 4 2 7 7 C 1.50697 * 109.54245 * 62.88476 * 5 4 2 8 8 O 1.21288 * 120.00196 * 274.50474 * 7 5 4 9 9 N 1.34779 * 120.00048 * 94.50834 * 7 5 4 10 10 C 1.46938 * 120.57850 * 174.42288 * 9 7 5 11 11 C 1.53325 * 108.69584 * 234.43142 * 10 9 7 12 12 C 1.52099 * 109.49796 * 306.71971 * 11 10 9 13 13 C 1.54398 * 110.51055 * 182.57593 * 12 11 10 14 14 C 1.54450 * 102.87549 * 152.62291 * 13 12 11 15 15 N 1.47087 * 107.29550 * 338.49401 * 14 13 12 16 16 C 1.36940 * 125.62785 * 179.01449 * 15 14 13 17 17 H 1.07996 * 120.00412 * 185.06724 * 16 15 14 18 18 C 1.38816 * 119.99864 * 5.05757 * 16 15 14 19 19 N 1.31614 * 120.00173 * 354.94015 * 18 16 15 20 20 Si 1.86799 * 119.99759 * 174.93665 * 18 16 15 21 21 H 1.48499 * 109.47156 * 95.00592 * 20 18 16 22 22 H 1.48501 * 109.47048 * 215.00073 * 20 18 16 23 23 H 1.48499 * 109.47198 * 335.00506 * 20 18 16 24 24 C 1.47571 * 108.74422 * 359.01372 * 15 14 13 25 25 C 1.52104 * 111.61548 * 59.15798 * 12 11 10 26 26 C 1.46935 * 120.58096 * 354.44559 * 9 7 5 27 27 C 1.53175 * 109.11074 * 302.97677 * 5 4 2 28 28 C 1.53282 * 109.06516 * 56.93454 * 27 5 4 29 29 O 1.42900 * 109.48647 * 239.96812 * 2 1 3 30 30 H 1.08999 * 109.47285 * 299.97983 * 1 2 3 31 31 H 1.08997 * 109.47200 * 59.97877 * 1 2 3 32 32 H 1.09000 * 109.47419 * 179.97438 * 1 2 3 33 33 H 1.08995 * 109.52441 * 57.69823 * 4 2 1 34 34 H 1.08997 * 109.57628 * 297.53585 * 4 2 1 35 35 H 1.09003 * 109.59945 * 114.66555 * 10 9 7 36 36 H 1.09000 * 109.73229 * 354.27344 * 10 9 7 37 37 H 1.09002 * 109.46991 * 66.73258 * 11 10 9 38 38 H 1.09005 * 109.46341 * 186.71283 * 11 10 9 39 39 H 1.09002 * 110.72798 * 270.96795 * 13 12 11 40 40 H 1.08996 * 110.72976 * 34.27119 * 13 12 11 41 41 H 1.08998 * 109.88374 * 97.92005 * 14 13 12 42 42 H 1.09001 * 109.87766 * 218.92085 * 14 13 12 43 43 H 0.96999 * 120.00182 * 179.97438 * 19 18 16 44 44 H 1.09000 * 110.37204 * 264.49347 * 24 15 14 45 45 H 1.08994 * 110.37585 * 142.15165 * 24 15 14 46 46 H 1.09009 * 109.46515 * 180.82569 * 25 12 11 47 47 H 1.09006 * 109.46261 * 60.84013 * 25 12 11 48 48 H 1.08996 * 109.60110 * 245.32445 * 26 9 7 49 49 H 1.09005 * 109.59929 * 5.79720 * 26 9 7 50 50 H 1.08992 * 109.52416 * 176.93200 * 27 5 4 51 51 H 1.09007 * 109.51675 * 297.11624 * 27 5 4 52 52 H 1.09003 * 109.45707 * 182.44843 * 28 27 5 53 53 H 1.08998 * 109.46344 * 62.45476 * 28 27 5 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 1 1.8935 1.0276 0.0000 4 6 2.0405 -0.7221 1.2497 5 6 3.5711 -0.7705 1.2124 6 1 3.9392 -1.3308 2.0719 7 6 4.1209 0.6320 1.2520 8 8 4.2411 1.2655 0.2247 9 7 4.4790 1.1825 2.4289 10 6 5.1288 2.4998 2.4711 11 6 6.4443 2.3742 3.2487 12 6 6.1741 1.7398 4.6044 13 6 7.4742 1.6610 5.4335 14 6 6.9573 1.6989 6.8885 15 7 5.6148 2.2991 6.8601 16 6 4.8052 2.4945 7.9471 17 1 3.8013 2.8692 7.8125 18 6 5.2748 2.2106 9.2222 19 7 6.4602 1.6607 9.3797 20 14 4.2243 2.6090 10.7146 21 1 3.4546 1.4036 11.1143 22 1 5.0994 3.0322 11.8372 23 1 3.2837 3.7080 10.3787 24 6 5.2843 2.6562 5.4669 25 6 5.5476 0.3610 4.4629 26 6 4.2271 0.4757 3.6922 27 6 4.0197 -1.4604 -0.0795 28 6 3.4309 -0.7091 -1.2788 29 8 2.0067 -0.6742 -1.1663 30 1 -0.3634 0.5135 0.8901 31 1 -0.3633 0.5141 -0.8898 32 1 -0.3634 -1.0276 -0.0005 33 1 1.6444 -1.7373 1.2710 34 1 1.7146 -0.1851 2.1404 35 1 4.4749 3.2141 2.9715 36 1 5.3348 2.8411 1.4566 37 1 7.1398 1.7501 2.6876 38 1 6.8780 3.3641 3.3908 39 1 8.0020 0.7281 5.2357 40 1 8.1147 2.5189 5.2291 41 1 6.9022 0.6866 7.2888 42 1 7.6236 2.3045 7.5028 43 1 6.7885 1.4627 10.2707 44 1 5.5211 3.7031 5.2771 45 1 4.2310 2.4618 5.2650 46 1 5.3559 -0.0541 5.4525 47 1 6.2294 -0.2938 3.9202 48 1 3.5043 1.0349 4.2862 49 1 3.8384 -0.5209 3.4824 50 1 5.1080 -1.4501 -0.1390 51 1 3.6635 -2.4906 -0.0848 52 1 3.7104 -1.2201 -2.2002 53 1 3.8193 0.3092 -1.2958 RHF calculation, no. of doubly occupied orbitals= 65 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 ZINC001035242407.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 31 2020 21:01:10 Heat of formation + Delta-G solvation = -59.410015 kcal Electronic energy + Delta-G solvation = -31533.355209 eV Core-core repulsion = 27598.272790 eV Total energy + Delta-G solvation = -3935.082419 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 1.38 seconds Orbital eigenvalues (eV) -41.08275 -39.51201 -38.00553 -35.78321 -34.03145 -33.07704 -32.84363 -31.18179 -30.58496 -29.03294 -28.02122 -26.24621 -25.29227 -24.36854 -23.45711 -22.85684 -22.13869 -21.19030 -20.04470 -19.36031 -17.76838 -17.25019 -16.69259 -16.47061 -16.09541 -15.65323 -15.41445 -15.07820 -14.71604 -14.59496 -14.22392 -14.01618 -13.88163 -13.66725 -13.18520 -13.05504 -12.73643 -12.64752 -12.52694 -12.41820 -12.27218 -12.06744 -12.04440 -11.97829 -11.70663 -11.26443 -11.12600 -11.10771 -10.97559 -10.92692 -10.84433 -10.74510 -10.49549 -10.19724 -10.05806 -9.80084 -9.79782 -9.72413 -9.56045 -9.03057 -8.60834 -8.53466 -6.83883 -5.74582 -3.07009 2.52912 2.95872 3.36804 3.43057 3.44716 3.71812 4.29494 4.43275 4.47336 4.54133 4.68982 4.77237 4.94247 4.97268 5.05009 5.10895 5.19075 5.22126 5.31725 5.37639 5.41994 5.45291 5.47415 5.52325 5.54551 5.57099 5.61851 5.69215 5.73476 5.77525 5.82471 5.84962 5.90685 5.94189 5.99961 6.02004 6.10538 6.15747 6.25336 6.29074 6.35175 6.52028 6.62864 6.66830 6.73471 6.90782 7.20650 7.40816 7.53448 7.62026 7.80497 8.13501 8.23544 9.19727 9.80451 10.47398 11.37181 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.018176 B = 0.002920 C = 0.002692 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1540.124488 B = 9587.737724 C =10396.826133 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.144 4.144 2 C 0.084 3.916 3 H 0.065 0.935 4 C -0.137 4.137 5 C -0.115 4.115 6 H 0.098 0.902 7 C 0.520 3.480 8 O -0.545 6.545 9 N -0.602 5.602 10 C 0.112 3.888 11 C -0.114 4.114 12 C -0.073 4.073 13 C -0.136 4.136 14 C 0.179 3.821 15 N -0.604 5.604 16 C -0.228 4.228 17 H 0.076 0.924 18 C -0.007 4.007 19 N -0.920 5.920 20 Si 0.908 3.092 21 H -0.290 1.290 22 H -0.291 1.291 23 H -0.281 1.281 24 C 0.146 3.854 25 C -0.110 4.110 26 C 0.102 3.898 27 C -0.134 4.134 28 C 0.040 3.960 29 O -0.382 6.382 30 H 0.069 0.931 31 H 0.062 0.938 32 H 0.062 0.938 33 H 0.083 0.917 34 H 0.077 0.923 35 H 0.069 0.931 36 H 0.087 0.913 37 H 0.061 0.939 38 H 0.075 0.925 39 H 0.058 0.942 40 H 0.056 0.944 41 H 0.041 0.959 42 H 0.043 0.957 43 H 0.251 0.749 44 H 0.016 0.984 45 H 0.037 0.963 46 H 0.088 0.912 47 H 0.057 0.943 48 H 0.078 0.922 49 H 0.083 0.917 50 H 0.074 0.926 51 H 0.075 0.925 52 H 0.083 0.917 53 H 0.097 0.903 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -4.931 -5.604 -17.836 19.335 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 -0.202 4.202 2 C 0.026 3.974 3 H 0.083 0.917 4 C -0.176 4.176 5 C -0.136 4.136 6 H 0.116 0.884 7 C 0.309 3.691 8 O -0.424 6.424 9 N -0.334 5.334 10 C -0.010 4.010 11 C -0.153 4.153 12 C -0.074 4.074 13 C -0.174 4.174 14 C 0.054 3.946 15 N -0.330 5.330 16 C -0.356 4.356 17 H 0.094 0.906 18 C -0.203 4.203 19 N -0.568 5.568 20 Si 0.739 3.261 21 H -0.217 1.217 22 H -0.217 1.217 23 H -0.207 1.207 24 C 0.020 3.980 25 C -0.149 4.149 26 C -0.020 4.020 27 C -0.172 4.172 28 C -0.036 4.036 29 O -0.301 6.301 30 H 0.088 0.912 31 H 0.081 0.919 32 H 0.081 0.919 33 H 0.101 0.899 34 H 0.096 0.904 35 H 0.087 0.913 36 H 0.106 0.894 37 H 0.080 0.920 38 H 0.093 0.907 39 H 0.076 0.924 40 H 0.075 0.925 41 H 0.059 0.941 42 H 0.061 0.939 43 H 0.062 0.938 44 H 0.034 0.966 45 H 0.055 0.945 46 H 0.107 0.893 47 H 0.076 0.924 48 H 0.097 0.903 49 H 0.101 0.899 50 H 0.092 0.908 51 H 0.094 0.906 52 H 0.101 0.899 53 H 0.114 0.886 Dipole moment (debyes) X Y Z Total from point charges -4.976 -5.362 -18.247 19.658 hybrid contribution -0.125 0.187 1.397 1.415 sum -5.100 -5.174 -16.849 18.349 Atomic orbital electron populations 1.21765 0.93249 1.02713 1.02433 1.22070 0.94682 0.95807 0.84795 0.91710 1.22153 0.92950 1.02897 0.99551 1.21454 0.97234 0.94090 1.00868 0.88364 1.20585 0.77233 0.88289 0.83001 1.90527 1.55770 1.63685 1.32441 1.48210 1.59017 1.19914 1.06245 1.21657 0.94015 0.83720 1.01641 1.21736 0.96452 1.01437 0.95671 1.21032 0.97282 0.95348 0.93707 1.22866 0.95617 1.00275 0.98638 1.21141 0.86065 0.98036 0.89316 1.44503 1.15889 1.71380 1.01226 1.19031 0.94789 1.37641 0.84167 0.90607 1.24793 0.96967 1.01221 0.97339 1.69971 1.18267 1.47440 1.21079 0.86160 0.79097 0.77966 0.82905 1.21718 1.21694 1.20682 1.21537 0.96028 0.94815 0.85629 1.21629 0.95302 0.96892 1.01036 1.22011 0.98755 0.97128 0.84138 1.22039 1.01350 0.99674 0.94165 1.23099 0.80740 1.03085 0.96703 1.87849 1.21541 1.77879 1.42853 0.91169 0.91877 0.91929 0.89884 0.90413 0.91260 0.89422 0.92021 0.90681 0.92366 0.92495 0.94106 0.93910 0.93813 0.96588 0.94501 0.89340 0.92381 0.90350 0.89896 0.90770 0.90628 0.89858 0.88575 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. 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 -0.14 -1.30 9.56 37.16 0.36 -0.94 16 2 C 0.08 0.93 2.98 -26.68 -0.08 0.85 16 3 H 0.06 0.84 6.67 -51.93 -0.35 0.49 16 4 C -0.14 -1.32 4.91 -26.59 -0.13 -1.45 16 5 C -0.12 -1.18 2.32 -91.59 -0.21 -1.39 16 6 H 0.10 0.89 5.98 -51.93 -0.31 0.58 16 7 C 0.52 6.58 6.10 -10.99 -0.07 6.51 16 8 O -0.55 -8.15 11.78 5.55 0.07 -8.09 16 9 N -0.60 -7.53 2.96 -172.59 -0.51 -8.04 16 10 C 0.11 1.44 6.15 -3.64 -0.02 1.41 16 11 C -0.11 -1.51 4.83 -27.02 -0.13 -1.65 16 12 C -0.07 -1.14 0.54 -154.10 -0.08 -1.22 16 13 C -0.14 -2.39 5.89 -25.24 -0.15 -2.54 16 14 C 0.18 4.15 5.01 -2.96 -0.01 4.14 16 15 N -0.60 -14.57 3.39 -170.32 -0.58 -15.15 16 16 C -0.23 -6.12 10.27 -15.06 -0.15 -6.27 16 17 H 0.08 1.97 7.83 -52.49 -0.41 1.56 16 18 C -0.01 -0.19 5.48 -17.43 -0.10 -0.28 16 19 N -0.92 -26.38 10.34 55.49 0.57 -25.81 16 20 Si 0.91 21.62 29.56 -169.99 -5.02 16.60 16 21 H -0.29 -6.88 7.11 56.52 0.40 -6.48 16 22 H -0.29 -7.03 7.11 56.52 0.40 -6.63 16 23 H -0.28 -6.54 7.11 56.52 0.40 -6.14 16 24 C 0.15 2.79 5.23 -2.87 -0.02 2.78 16 25 C -0.11 -1.58 4.83 -27.02 -0.13 -1.71 16 26 C 0.10 1.24 5.99 -3.64 -0.02 1.22 16 27 C -0.13 -1.33 5.57 -26.49 -0.15 -1.47 16 28 C 0.04 0.45 6.54 37.30 0.24 0.69 16 29 O -0.38 -4.75 10.41 -35.23 -0.37 -5.11 16 30 H 0.07 0.54 8.14 -51.93 -0.42 0.12 16 31 H 0.06 0.56 8.14 -51.93 -0.42 0.14 16 32 H 0.06 0.53 8.14 -51.93 -0.42 0.10 16 33 H 0.08 0.72 8.14 -51.93 -0.42 0.29 16 34 H 0.08 0.71 8.14 -51.93 -0.42 0.28 16 35 H 0.07 0.90 7.65 -51.93 -0.40 0.50 16 36 H 0.09 1.15 7.04 -51.93 -0.37 0.78 16 37 H 0.06 0.80 8.14 -51.93 -0.42 0.37 16 38 H 0.07 0.97 8.09 -51.93 -0.42 0.55 16 39 H 0.06 0.94 8.01 -51.93 -0.42 0.52 16 40 H 0.06 0.96 8.00 -51.93 -0.42 0.55 16 41 H 0.04 1.04 7.53 -51.93 -0.39 0.65 16 42 H 0.04 1.13 7.37 -51.93 -0.38 0.74 16 43 H 0.25 7.04 8.31 -40.82 -0.34 6.70 16 44 H 0.02 0.32 7.97 -51.93 -0.41 -0.09 16 45 H 0.04 0.69 6.21 -51.93 -0.32 0.37 16 46 H 0.09 1.49 7.84 -51.92 -0.41 1.08 16 47 H 0.06 0.77 8.14 -51.93 -0.42 0.34 16 48 H 0.08 1.04 6.59 -51.93 -0.34 0.69 16 49 H 0.08 0.83 5.35 -51.93 -0.28 0.55 16 50 H 0.07 0.71 8.14 -51.93 -0.42 0.29 16 51 H 0.08 0.66 8.14 -51.93 -0.42 0.24 16 52 H 0.08 0.81 8.14 -51.93 -0.42 0.38 16 53 H 0.10 1.28 5.12 -51.93 -0.27 1.02 16 LS Contribution 384.94 15.07 5.80 5.80 Total: -1.00 -30.40 384.94 -10.14 -40.54 By element: Atomic # 1 Polarization: 9.83 SS G_CDS: -9.25 Total: 0.58 kcal Atomic # 6 Polarization: -0.47 SS G_CDS: -0.85 Total: -1.32 kcal Atomic # 7 Polarization: -48.48 SS G_CDS: -0.51 Total: -48.99 kcal Atomic # 8 Polarization: -12.90 SS G_CDS: -0.30 Total: -13.20 kcal Atomic # 14 Polarization: 21.62 SS G_CDS: -5.02 Total: 16.60 kcal Total LS contribution 5.80 Total: 5.80 kcal Total: -30.40 -10.14 -40.54 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. ZINC001035242407.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 -18.870 kcal (2) G-P(sol) polarization free energy of solvation -30.400 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -49.270 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.140 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.540 kcal (6) G-S(sol) free energy of system = (1) + (5) -59.410 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.38 seconds