Wall clock time and date at job start Tue Mar 31 2020 12:50:03 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 1.52995 * 1 3 3 H 1.08999 * 109.47596 * 2 1 4 4 C 1.52999 * 109.47533 * 239.99870 * 2 1 3 5 5 C 1.52999 * 109.47480 * 174.99998 * 4 2 1 6 6 O 1.42896 * 109.47317 * 180.02562 * 5 4 2 7 7 C 1.42896 * 114.00241 * 179.97438 * 6 5 4 8 8 C 1.50702 * 109.47086 * 179.97438 * 7 6 5 9 9 C 1.38239 * 119.99863 * 269.72557 * 8 7 6 10 10 C 1.38229 * 119.99889 * 179.76653 * 9 8 7 11 11 C 1.38239 * 120.00123 * 0.51318 * 10 9 8 12 12 C 1.38235 * 119.99749 * 359.74132 * 11 10 9 13 13 C 1.38228 * 119.99960 * 0.02562 * 12 11 10 14 14 N 1.46902 * 109.47251 * 119.99920 * 2 1 3 15 15 C 1.46898 * 111.00157 * 275.00398 * 14 2 1 16 16 C 1.52997 * 109.47123 * 179.97438 * 15 14 2 17 17 C 1.53006 * 109.47164 * 299.99884 * 16 15 14 18 18 C 1.52999 * 109.47592 * 59.99590 * 16 15 14 19 19 C 1.52997 * 109.47232 * 179.97438 * 16 15 14 20 20 C 1.50701 * 109.47212 * 179.97438 * 19 16 15 21 21 H 1.07998 * 120.00129 * 359.97438 * 20 19 16 22 22 C 1.37880 * 119.99861 * 180.02562 * 20 19 16 23 23 N 1.31520 * 119.99850 * 179.97438 * 22 20 19 24 24 Si 1.86798 * 120.00180 * 359.97438 * 22 20 19 25 25 H 1.48496 * 109.47117 * 90.00278 * 24 22 20 26 26 H 1.48501 * 109.47010 * 210.00349 * 24 22 20 27 27 H 1.48500 * 109.47001 * 330.00215 * 24 22 20 28 28 H 1.09001 * 109.47056 * 59.99873 * 1 2 3 29 29 H 1.09003 * 109.47112 * 179.97438 * 1 2 3 30 30 H 1.08994 * 109.47102 * 299.99825 * 1 2 3 31 31 H 1.09000 * 109.47436 * 295.00652 * 4 2 1 32 32 H 1.09001 * 109.46636 * 55.00041 * 4 2 1 33 33 H 1.08999 * 109.47233 * 300.00179 * 5 4 2 34 34 H 1.08996 * 109.46851 * 59.99988 * 5 4 2 35 35 H 1.08997 * 109.47192 * 299.99943 * 7 6 5 36 36 H 1.09003 * 109.47008 * 59.99965 * 7 6 5 37 37 H 1.08001 * 120.00010 * 359.97438 * 9 8 7 38 38 H 1.08002 * 120.00392 * 180.23169 * 10 9 8 39 39 H 1.07997 * 120.00333 * 179.72881 * 11 10 9 40 40 H 1.08000 * 120.00004 * 179.97438 * 12 11 10 41 41 H 1.08008 * 120.00164 * 179.97438 * 13 12 11 42 42 H 1.00909 * 110.99603 * 38.95478 * 14 2 1 43 43 H 1.09001 * 109.47062 * 59.99599 * 15 14 2 44 44 H 1.09002 * 109.46774 * 299.99237 * 15 14 2 45 45 H 1.09001 * 109.46801 * 180.02562 * 17 16 15 46 46 H 1.09001 * 109.46998 * 299.99705 * 17 16 15 47 47 H 1.09000 * 109.47050 * 59.99996 * 17 16 15 48 48 H 1.09000 * 109.47160 * 300.00333 * 18 16 15 49 49 H 1.09002 * 109.46719 * 60.00054 * 18 16 15 50 50 H 1.08993 * 109.47839 * 179.97438 * 18 16 15 51 51 H 1.09002 * 109.47153 * 299.99992 * 19 16 15 52 52 H 1.09001 * 109.47289 * 60.00075 * 19 16 15 53 53 H 0.97002 * 119.99994 * 179.97438 * 23 22 20 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 1.8934 1.0276 0.0000 4 6 2.0401 -0.7213 -1.2492 5 6 3.5649 -0.6133 -1.3136 6 8 4.0412 -1.2864 -2.4806 7 6 5.4610 -1.2446 -2.6370 8 6 5.8500 -1.9816 -3.8926 9 6 6.1328 -3.3338 -3.8409 10 6 6.4849 -4.0108 -4.9934 11 6 6.5646 -3.3335 -6.1959 12 6 6.2868 -1.9803 -6.2467 13 6 5.9300 -1.3043 -5.0950 14 7 2.0197 -0.6925 1.1995 15 6 2.0824 0.2226 2.3469 16 6 2.5950 -0.5332 3.5745 17 6 1.6451 -1.6890 3.8952 18 6 3.9920 -1.0864 3.2863 19 6 2.6609 0.4199 4.7694 20 6 3.1652 -0.3246 5.9787 21 1 3.4134 -1.3730 5.9027 22 6 3.3087 0.3323 7.1824 23 7 3.7484 -0.3177 8.2379 24 14 2.8787 2.1453 7.3142 25 1 1.4492 2.2890 7.6897 26 1 3.7295 2.7817 8.3517 27 1 3.1157 2.8065 6.0058 28 1 -0.3633 0.5139 -0.8900 29 1 -0.3633 -1.0277 -0.0005 30 1 -0.3633 0.5138 0.8899 31 1 1.7517 -1.7715 -1.2056 32 1 1.6054 -0.2617 -2.1369 33 1 3.8532 0.4370 -1.3573 34 1 3.9994 -1.0728 -0.4259 35 1 5.7883 -0.2074 -2.7079 36 1 5.9353 -1.7173 -1.7769 37 1 6.0754 -3.8619 -2.9006 38 1 6.7023 -5.0680 -4.9538 39 1 6.8439 -3.8616 -7.0957 40 1 6.3494 -1.4511 -7.1861 41 1 5.7134 -0.2469 -5.1346 42 1 1.4495 -1.4980 1.4100 43 1 1.0870 0.6163 2.5525 44 1 2.7588 1.0461 2.1183 45 1 2.0101 -2.2272 4.7700 46 1 0.6498 -1.2950 4.1006 47 1 1.5985 -2.3680 3.0438 48 1 3.9455 -1.7654 2.4349 49 1 4.6688 -0.2630 3.0578 50 1 4.3574 -1.6244 4.1609 51 1 3.3379 1.2431 4.5407 52 1 1.6658 0.8143 4.9750 53 1 3.8497 0.1446 9.0847 RHF calculation, no. of doubly occupied orbitals= 62 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 ZINC000389916985.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 12:50:03 Heat of formation + Delta-G solvation = -47.573125 kcal Electronic energy + Delta-G solvation = -26479.006311 eV Core-core repulsion = 22928.545281 eV Total energy + Delta-G solvation = -3550.461030 eV No. of doubly occupied orbitals = 62 Molecular weight (most abundant/longest-lived isotopes) = 319.225 amu Computer time = 0.74 seconds Orbital eigenvalues (eV) -39.61453 -38.49099 -37.58527 -35.79605 -32.64081 -32.21677 -31.16874 -30.72482 -28.87471 -27.50256 -26.37836 -26.12223 -25.10341 -23.12827 -22.84665 -21.93453 -21.57888 -20.59035 -17.84705 -17.16834 -16.79208 -16.50104 -16.34186 -15.71316 -15.46959 -15.07600 -14.72401 -14.31404 -14.19214 -14.02426 -13.68293 -13.36490 -13.27058 -13.11727 -12.90111 -12.82643 -12.57041 -12.32379 -12.22605 -11.91008 -11.74925 -11.42304 -11.25543 -11.16760 -11.09092 -11.03119 -10.99496 -10.85304 -10.76688 -10.50021 -10.32676 -9.82439 -9.67436 -9.63351 -9.27804 -9.18580 -9.10058 -8.90056 -8.49833 -8.13156 -6.00093 -3.96154 1.00325 1.13738 3.31398 3.32016 3.39338 3.42671 3.87257 4.35757 4.47926 4.55846 4.57686 4.73268 4.84116 4.94376 5.02505 5.04201 5.16694 5.20677 5.27027 5.32726 5.33875 5.39511 5.46079 5.55438 5.58710 5.66018 5.70258 5.73142 5.77287 5.83683 5.87368 6.01904 6.06867 6.15284 6.17287 6.21058 6.22662 6.27262 6.34878 6.42160 6.58949 6.69707 6.71101 6.79421 7.08148 7.14112 7.14779 7.18808 7.31409 7.33336 7.46737 7.64499 7.85560 8.59823 9.05949 9.63026 11.12980 Molecular weight = 319.23amu Principal moments of inertia in cm(-1) A = 0.017656 B = 0.002129 C = 0.002016 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1585.486690 B =13148.393114 C =13886.596711 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.180 4.180 2 C 0.083 3.917 3 H 0.076 0.924 4 C -0.100 4.100 5 C 0.067 3.933 6 O -0.388 6.388 7 C 0.103 3.897 8 C -0.086 4.086 9 C -0.098 4.098 10 C -0.124 4.124 11 C -0.118 4.118 12 C -0.125 4.125 13 C -0.100 4.100 14 N -0.681 5.681 15 C 0.068 3.932 16 C -0.049 4.049 17 C -0.130 4.130 18 C -0.117 4.117 19 C -0.004 4.004 20 C -0.506 4.506 21 H 0.078 0.922 22 C 0.064 3.936 23 N -0.905 5.905 24 Si 0.876 3.124 25 H -0.279 1.279 26 H -0.289 1.289 27 H -0.267 1.267 28 H 0.058 0.942 29 H 0.057 0.943 30 H 0.057 0.943 31 H 0.069 0.931 32 H 0.065 0.935 33 H 0.041 0.959 34 H 0.069 0.931 35 H 0.055 0.945 36 H 0.059 0.941 37 H 0.124 0.876 38 H 0.123 0.877 39 H 0.121 0.879 40 H 0.122 0.878 41 H 0.122 0.878 42 H 0.341 0.659 43 H 0.023 0.977 44 H 0.064 0.936 45 H 0.069 0.931 46 H 0.039 0.961 47 H 0.036 0.964 48 H 0.044 0.956 49 H 0.038 0.962 50 H 0.059 0.941 51 H 0.014 0.986 52 H 0.007 0.993 53 H 0.261 0.739 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 1.034 -2.611 -27.804 27.946 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 -0.239 4.239 2 C -0.028 4.028 3 H 0.094 0.906 4 C -0.138 4.138 5 C -0.009 4.009 6 O -0.308 6.308 7 C 0.027 3.973 8 C -0.086 4.086 9 C -0.116 4.116 10 C -0.142 4.142 11 C -0.136 4.136 12 C -0.143 4.143 13 C -0.119 4.119 14 N -0.313 5.313 15 C -0.061 4.061 16 C -0.049 4.049 17 C -0.188 4.188 18 C -0.174 4.174 19 C -0.042 4.042 20 C -0.544 4.544 21 H 0.096 0.904 22 C -0.137 4.137 23 N -0.545 5.545 24 Si 0.704 3.296 25 H -0.205 1.205 26 H -0.216 1.216 27 H -0.192 1.192 28 H 0.077 0.923 29 H 0.076 0.924 30 H 0.076 0.924 31 H 0.088 0.912 32 H 0.084 0.916 33 H 0.059 0.941 34 H 0.087 0.913 35 H 0.073 0.927 36 H 0.078 0.922 37 H 0.142 0.858 38 H 0.141 0.859 39 H 0.139 0.861 40 H 0.140 0.860 41 H 0.140 0.860 42 H 0.161 0.839 43 H 0.042 0.958 44 H 0.083 0.917 45 H 0.088 0.912 46 H 0.058 0.942 47 H 0.055 0.945 48 H 0.063 0.937 49 H 0.057 0.943 50 H 0.078 0.922 51 H 0.032 0.968 52 H 0.026 0.974 53 H 0.071 0.929 Dipole moment (debyes) X Y Z Total from point charges 1.623 -2.591 -27.899 28.066 hybrid contribution -1.058 1.325 0.679 1.826 sum 0.565 -1.267 -27.220 27.256 Atomic orbital electron populations 1.22467 0.97169 1.02164 1.02116 1.21495 0.92502 0.98036 0.90740 0.90614 1.21454 0.93798 1.01720 0.96870 1.22497 0.95182 0.95601 0.87642 1.87896 1.20200 1.77199 1.45478 1.21256 0.82739 0.98677 0.94666 1.19684 1.00077 0.94262 0.94618 1.21129 0.98070 0.93652 0.98787 1.21168 1.00305 1.00002 0.92720 1.21192 0.99833 0.94669 0.97916 1.21141 1.00221 0.94740 0.98230 1.21080 0.98641 1.00081 0.92058 1.60691 1.56872 1.09977 1.03779 1.22153 0.98688 0.94990 0.90289 1.20418 0.95489 0.95787 0.93242 1.21781 0.98414 0.97808 1.00773 1.21607 0.95460 0.99923 1.00446 1.19627 0.95986 0.94940 0.93654 1.21140 1.42826 0.98240 0.92224 0.90430 1.25030 0.94996 0.97742 0.95918 1.69913 1.47320 1.36422 1.00850 0.86844 0.78393 0.86472 0.77916 1.20547 1.21565 1.19161 0.92338 0.92402 0.92402 0.91212 0.91610 0.94079 0.91291 0.92668 0.92249 0.85758 0.85912 0.86114 0.86018 0.86010 0.83904 0.95844 0.91736 0.91213 0.94193 0.94546 0.93695 0.94315 0.92169 0.96767 0.97448 0.92907 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 -0.18 -1.80 9.16 37.16 0.34 -1.46 16 2 C 0.08 0.91 2.59 -67.71 -0.18 0.74 16 3 H 0.08 0.86 7.80 -51.93 -0.40 0.45 16 4 C -0.10 -1.06 5.26 -26.73 -0.14 -1.20 16 5 C 0.07 0.76 5.83 37.16 0.22 0.98 16 6 O -0.39 -4.73 10.33 -35.23 -0.36 -5.09 16 7 C 0.10 1.06 6.06 36.01 0.22 1.28 16 8 C -0.09 -0.88 5.51 -104.62 -0.58 -1.45 16 9 C -0.10 -0.94 9.70 -39.58 -0.38 -1.32 16 10 C -0.12 -1.03 10.05 -39.58 -0.40 -1.43 16 11 C -0.12 -0.92 10.05 -39.58 -0.40 -1.32 16 12 C -0.13 -1.01 10.05 -39.59 -0.40 -1.41 16 13 C -0.10 -0.92 9.70 -39.59 -0.38 -1.30 16 14 N -0.68 -8.87 4.91 -106.73 -0.52 -9.39 16 15 C 0.07 1.06 4.45 -3.83 -0.02 1.04 16 16 C -0.05 -0.92 0.60 -154.51 -0.09 -1.01 16 17 C -0.13 -2.35 7.89 37.16 0.29 -2.06 16 18 C -0.12 -2.19 8.06 37.16 0.30 -1.89 16 19 C 0.00 -0.10 3.11 -27.88 -0.09 -0.19 16 20 C -0.51 -13.89 8.20 -34.44 -0.28 -14.17 16 21 H 0.08 2.27 5.92 -52.49 -0.31 1.96 16 22 C 0.06 1.83 5.47 -17.82 -0.10 1.73 16 23 N -0.91 -27.70 13.96 55.43 0.77 -26.92 16 24 Si 0.88 21.73 27.47 -169.99 -4.67 17.06 16 25 H -0.28 -6.85 7.11 56.52 0.40 -6.45 16 26 H -0.29 -7.17 7.11 56.52 0.40 -6.77 16 27 H -0.27 -6.38 6.54 56.52 0.37 -6.01 16 28 H 0.06 0.52 8.14 -51.93 -0.42 0.09 16 29 H 0.06 0.56 8.13 -51.93 -0.42 0.14 16 30 H 0.06 0.63 7.45 -51.93 -0.39 0.24 16 31 H 0.07 0.77 8.14 -51.93 -0.42 0.35 16 32 H 0.07 0.66 8.14 -51.93 -0.42 0.23 16 33 H 0.04 0.45 8.14 -51.93 -0.42 0.02 16 34 H 0.07 0.86 7.75 -51.93 -0.40 0.46 16 35 H 0.06 0.51 8.09 -51.93 -0.42 0.09 16 36 H 0.06 0.58 8.08 -51.93 -0.42 0.16 16 37 H 0.12 1.07 8.06 -52.49 -0.42 0.64 16 38 H 0.12 0.77 8.06 -52.49 -0.42 0.34 16 39 H 0.12 0.67 8.06 -52.49 -0.42 0.24 16 40 H 0.12 0.71 8.06 -52.49 -0.42 0.29 16 41 H 0.12 0.95 8.06 -52.48 -0.42 0.53 16 42 H 0.34 4.39 6.51 -39.29 -0.26 4.13 16 43 H 0.02 0.37 7.44 -51.93 -0.39 -0.02 16 44 H 0.06 1.03 8.06 -51.93 -0.42 0.61 16 45 H 0.07 1.43 6.62 -51.93 -0.34 1.09 16 46 H 0.04 0.70 8.14 -51.93 -0.42 0.28 16 47 H 0.04 0.55 6.57 -51.93 -0.34 0.21 16 48 H 0.04 0.75 7.60 -51.93 -0.39 0.36 16 49 H 0.04 0.72 8.14 -51.93 -0.42 0.29 16 50 H 0.06 1.27 6.62 -51.93 -0.34 0.92 16 51 H 0.01 0.34 7.20 -51.93 -0.37 -0.04 16 52 H 0.01 0.17 7.57 -51.93 -0.39 -0.22 16 53 H 0.26 7.54 8.31 -40.82 -0.34 7.20 16 LS Contribution 414.01 15.07 6.24 6.24 Total: -1.00 -30.27 414.01 -10.44 -40.71 By element: Atomic # 1 Polarization: 11.67 SS G_CDS: -9.84 Total: 1.83 kcal Atomic # 6 Polarization: -22.38 SS G_CDS: -2.06 Total: -24.44 kcal Atomic # 7 Polarization: -36.56 SS G_CDS: 0.25 Total: -36.32 kcal Atomic # 8 Polarization: -4.73 SS G_CDS: -0.36 Total: -5.09 kcal Atomic # 14 Polarization: 21.73 SS G_CDS: -4.67 Total: 17.06 kcal Total LS contribution 6.24 Total: 6.24 kcal Total: -30.27 -10.44 -40.71 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. ZINC000389916985.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 -6.860 kcal (2) G-P(sol) polarization free energy of solvation -30.271 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -37.131 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.442 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.714 kcal (6) G-S(sol) free energy of system = (1) + (5) -47.573 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.74 seconds