Wall clock time and date at job start Tue Mar 31 2020 23:24:36 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 1.53001 * 1 3 3 H 1.08997 * 109.47252 * 2 1 4 4 C 1.53000 * 109.47084 * 239.99894 * 2 1 3 5 5 C 1.52999 * 109.47329 * 179.97438 * 4 2 1 6 6 C 1.53005 * 109.46729 * 60.00265 * 5 4 2 7 7 C 1.53000 * 109.46998 * 299.99937 * 6 5 4 8 8 H 1.08999 * 109.46887 * 179.97438 * 7 6 5 9 9 O 1.42898 * 109.47262 * 299.99969 * 7 6 5 10 10 C 1.42898 * 114.00164 * 270.00390 * 9 7 6 11 11 C 1.50696 * 109.47460 * 179.97438 * 10 9 7 12 12 O 1.21284 * 119.99665 * 0.02562 * 11 10 9 13 13 N 1.34769 * 120.00187 * 179.97438 * 11 10 9 14 14 C 1.46502 * 120.00153 * 174.97848 * 13 11 10 15 15 C 1.53000 * 112.94480 * 65.41583 * 14 13 11 16 16 C 1.53007 * 109.47109 * 49.47212 * 15 14 13 17 17 O 1.42896 * 109.47244 * 174.97473 * 16 15 14 18 18 C 1.53942 * 113.83954 * 197.10272 * 14 13 11 19 19 N 1.47582 * 86.11508 * 90.75489 * 18 14 13 20 20 C 1.36940 * 134.48989 * 204.64275 * 19 18 14 21 21 H 1.08004 * 119.99894 * 179.97438 * 20 19 18 22 22 C 1.38817 * 120.00001 * 359.97438 * 20 19 18 23 23 N 1.31618 * 119.99926 * 0.02562 * 22 20 19 24 24 Si 1.86801 * 119.99681 * 179.97438 * 22 20 19 25 25 H 1.48503 * 109.47150 * 60.00577 * 24 22 20 26 26 H 1.48508 * 109.46700 * 180.02562 * 24 22 20 27 27 H 1.48493 * 109.47374 * 299.99783 * 24 22 20 28 28 C 1.47573 * 91.01689 * 24.63833 * 19 18 14 29 29 C 1.52996 * 109.47150 * 120.00169 * 2 1 3 30 30 H 1.08997 * 109.47252 * 180.02562 * 1 2 3 31 31 H 1.09003 * 109.47108 * 300.00081 * 1 2 3 32 32 H 1.08999 * 109.46930 * 59.99676 * 1 2 3 33 33 H 1.09007 * 109.47366 * 59.99729 * 4 2 1 34 34 H 1.08997 * 109.47162 * 300.00161 * 4 2 1 35 35 H 1.08997 * 109.47368 * 300.00327 * 5 4 2 36 36 H 1.09001 * 109.46867 * 179.97438 * 5 4 2 37 37 H 1.08995 * 109.47106 * 179.97438 * 6 5 4 38 38 H 1.08997 * 109.47146 * 59.99925 * 6 5 4 39 39 H 1.09003 * 109.47416 * 59.99488 * 10 9 7 40 40 H 1.09003 * 109.46953 * 299.99909 * 10 9 7 41 41 H 0.97002 * 120.00479 * 354.97816 * 13 11 10 42 42 H 1.08992 * 109.47378 * 289.47291 * 15 14 13 43 43 H 1.08999 * 109.47359 * 169.46493 * 15 14 13 44 44 H 1.09001 * 109.46829 * 54.96621 * 16 15 14 45 45 H 1.08998 * 109.46724 * 294.97280 * 16 15 14 46 46 H 0.96701 * 114.00056 * 179.97438 * 17 16 15 47 47 H 1.09008 * 113.76976 * 205.04614 * 18 14 13 48 48 H 1.08996 * 113.77143 * 336.45133 * 18 14 13 49 49 H 0.96998 * 119.99714 * 180.02562 * 23 22 20 50 50 H 1.08999 * 113.77154 * 221.06117 * 28 19 18 51 51 H 1.09000 * 113.87160 * 89.67521 * 28 19 18 52 52 H 1.08997 * 109.47181 * 59.99787 * 29 2 1 53 53 H 1.09003 * 109.46911 * 299.99870 * 29 2 1 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 2.0400 -0.7213 -1.2492 5 6 3.5700 -0.7207 -1.2496 6 6 4.0805 -1.4417 -0.0003 7 6 3.5705 -0.7204 1.2489 8 1 3.9338 -1.2343 2.1388 9 8 4.0464 0.6270 1.2487 10 6 5.3061 0.7986 1.9011 11 6 5.7096 2.2493 1.8408 12 8 4.9890 3.0568 1.2934 13 7 6.8706 2.6495 2.3960 14 6 7.3161 4.0366 2.2426 15 6 6.3943 5.0396 2.9391 16 6 6.1332 4.5805 4.3751 17 8 5.3694 5.5742 5.0615 18 6 8.8091 4.2484 2.5522 19 7 9.0399 3.9917 1.1173 20 6 10.1029 3.5390 0.3822 21 1 10.0138 3.4358 -0.6892 22 6 11.2951 3.2126 1.0142 23 7 11.4035 3.3379 2.3199 24 14 12.7448 2.5943 0.0115 25 1 13.1362 3.6268 -0.9816 26 1 13.8898 2.3174 0.9158 27 1 12.3609 1.3468 -0.6965 28 6 7.6651 4.4188 0.7928 29 6 2.0400 -0.7213 1.2492 30 1 -0.3633 -1.0276 0.0005 31 1 -0.3633 0.5139 0.8900 32 1 -0.3633 0.5139 -0.8900 33 1 1.6766 -0.2075 -2.1393 34 1 1.6767 -1.7489 -1.2492 35 1 3.9330 0.3070 -1.2498 36 1 3.9332 -1.2350 -2.1394 37 1 5.1704 -1.4418 -0.0008 38 1 3.7175 -2.4695 -0.0001 39 1 6.0602 0.1910 1.4007 40 1 5.2213 0.4876 2.9423 41 1 7.4113 2.0191 2.8971 42 1 5.4492 5.1000 2.3996 43 1 6.8686 6.0209 2.9521 44 1 7.0838 4.4341 4.8882 45 1 5.5795 3.6418 4.3614 46 1 5.1659 5.3492 5.9797 47 1 9.0539 5.2647 2.8615 48 1 9.2339 3.4888 3.2083 49 1 12.2366 3.1102 2.7614 50 1 7.1764 3.7952 0.0443 51 1 7.5719 5.4847 0.5849 52 1 1.6767 -1.7489 1.2492 53 1 1.6767 -0.2074 2.1392 RHF calculation, no. of doubly occupied orbitals= 66 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 ZINC001725206072.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 23:24:36 Heat of formation + Delta-G solvation = -97.083949 kcal Electronic energy + Delta-G solvation = -31445.347052 eV Core-core repulsion = 27318.174917 eV Total energy + Delta-G solvation = -4127.172135 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.21 seconds Orbital eigenvalues (eV) -40.10165 -39.45194 -37.72146 -36.50059 -36.15471 -33.46565 -32.38959 -31.99436 -30.72283 -30.32638 -27.65793 -26.84526 -26.51069 -25.04512 -23.48350 -22.65145 -21.45218 -21.32720 -20.49670 -19.67929 -18.74824 -17.30456 -16.97190 -16.70664 -16.38674 -15.94348 -15.46410 -15.14016 -14.98648 -14.75325 -14.56564 -14.36282 -14.08899 -13.78348 -13.62266 -13.50171 -13.04763 -12.76565 -12.72293 -12.59600 -12.42622 -12.24911 -11.97073 -11.90938 -11.63778 -11.50875 -11.37259 -11.23725 -10.99394 -10.97678 -10.87514 -10.66637 -10.61729 -10.37503 -10.11446 -10.05738 -9.86640 -9.71915 -9.57015 -9.51680 -9.16936 -8.89242 -8.48334 -6.92692 -5.82448 -3.13544 2.94820 3.08317 3.36398 3.41133 3.41790 4.08319 4.36995 4.47616 4.53559 4.57779 4.68908 4.93697 4.97904 5.05943 5.10289 5.12936 5.19068 5.21680 5.28372 5.34985 5.37346 5.43059 5.46519 5.48463 5.52369 5.61489 5.63073 5.68207 5.72250 5.80149 5.81393 5.91530 5.96145 6.12458 6.14676 6.19659 6.24931 6.29474 6.31875 6.47346 6.52392 6.57596 6.60705 6.86839 7.06679 7.09194 7.33525 7.45702 7.79390 7.91366 7.96905 8.65461 8.99977 9.65665 10.53794 11.34888 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.010201 B = 0.003212 C = 0.002620 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2744.252626 B = 8716.104995 C =10685.002145 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.147 4.147 2 C -0.091 4.091 3 H 0.084 0.916 4 C -0.111 4.111 5 C -0.117 4.117 6 C -0.141 4.141 7 C 0.087 3.913 8 H 0.059 0.941 9 O -0.348 6.348 10 C 0.043 3.957 11 C 0.515 3.485 12 O -0.520 6.520 13 N -0.691 5.691 14 C 0.128 3.872 15 C -0.115 4.115 16 C 0.084 3.916 17 O -0.577 6.577 18 C 0.167 3.833 19 N -0.608 5.608 20 C -0.218 4.218 21 H 0.079 0.921 22 C -0.008 4.008 23 N -0.925 5.925 24 Si 0.912 3.088 25 H -0.285 1.285 26 H -0.290 1.290 27 H -0.285 1.285 28 C 0.123 3.877 29 C -0.107 4.107 30 H 0.050 0.950 31 H 0.053 0.947 32 H 0.053 0.947 33 H 0.059 0.941 34 H 0.056 0.944 35 H 0.074 0.926 36 H 0.057 0.943 37 H 0.064 0.936 38 H 0.068 0.932 39 H 0.078 0.922 40 H 0.073 0.927 41 H 0.401 0.599 42 H 0.079 0.921 43 H 0.077 0.923 44 H 0.046 0.954 45 H 0.038 0.962 46 H 0.372 0.628 47 H 0.042 0.958 48 H 0.077 0.923 49 H 0.254 0.746 50 H 0.050 0.950 51 H 0.043 0.957 52 H 0.072 0.928 53 H 0.067 0.933 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -17.629 -9.854 2.907 20.404 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 -0.204 4.204 2 C -0.110 4.110 3 H 0.102 0.898 4 C -0.148 4.148 5 C -0.154 4.154 6 C -0.179 4.179 7 C 0.029 3.971 8 H 0.077 0.923 9 O -0.266 6.266 10 C -0.038 4.038 11 C 0.300 3.700 12 O -0.395 6.395 13 N -0.343 5.343 14 C 0.041 3.959 15 C -0.154 4.154 16 C 0.007 3.993 17 O -0.382 6.382 18 C 0.041 3.959 19 N -0.334 5.334 20 C -0.345 4.345 21 H 0.097 0.903 22 C -0.204 4.204 23 N -0.572 5.572 24 Si 0.742 3.258 25 H -0.212 1.212 26 H -0.216 1.216 27 H -0.212 1.212 28 C -0.004 4.004 29 C -0.144 4.144 30 H 0.069 0.931 31 H 0.072 0.928 32 H 0.072 0.928 33 H 0.078 0.922 34 H 0.074 0.926 35 H 0.093 0.907 36 H 0.076 0.924 37 H 0.082 0.918 38 H 0.087 0.913 39 H 0.096 0.904 40 H 0.090 0.910 41 H 0.236 0.764 42 H 0.097 0.903 43 H 0.095 0.905 44 H 0.064 0.936 45 H 0.057 0.943 46 H 0.218 0.782 47 H 0.059 0.941 48 H 0.095 0.905 49 H 0.064 0.936 50 H 0.068 0.932 51 H 0.061 0.939 52 H 0.090 0.910 53 H 0.086 0.914 Dipole moment (debyes) X Y Z Total from point charges -17.862 -8.953 1.751 20.056 hybrid contribution 1.470 -1.187 0.356 1.923 sum -16.391 -10.140 2.107 19.389 Atomic orbital electron populations 1.21835 0.95650 1.01252 1.01652 1.21071 0.94761 1.01030 0.94128 0.89781 1.21566 0.95665 0.99950 0.97652 1.21428 0.95438 1.01861 0.96688 1.22023 1.00907 0.99145 0.95802 1.22152 0.94790 0.83247 0.96920 0.92271 1.88061 1.34508 1.26390 1.77648 1.22262 0.88146 0.95386 0.97961 1.20067 0.81446 0.89490 0.79042 1.90691 1.51719 1.54311 1.42795 1.45425 1.21961 1.11838 1.55109 1.22277 0.95500 0.80204 0.97969 1.21712 1.01201 0.98961 0.93550 1.22107 0.93828 0.90022 0.93378 1.86488 1.75870 1.47118 1.28678 1.22555 0.85291 0.99295 0.88723 1.45909 1.09458 1.74709 1.03333 1.18972 0.89486 1.35458 0.90595 0.90344 1.24736 0.97626 1.02101 0.95937 1.69772 1.26129 1.54158 1.07162 0.86206 0.82059 0.78690 0.78843 1.21201 1.21584 1.21172 1.22826 0.86275 0.97442 0.93824 1.21665 0.93060 1.00777 0.98900 0.93120 0.92791 0.92793 0.92187 0.92565 0.90749 0.92424 0.91763 0.91334 0.90429 0.90950 0.76412 0.90250 0.90479 0.93557 0.94333 0.78184 0.94052 0.90475 0.93605 0.93216 0.93903 0.90981 0.91394 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -0.15 -1.24 9.19 37.16 0.34 -0.90 16 2 C -0.09 -0.92 2.57 -90.62 -0.23 -1.15 16 3 H 0.08 1.09 7.68 -51.93 -0.40 0.69 16 4 C -0.11 -1.05 5.20 -26.73 -0.14 -1.19 16 5 C -0.12 -1.25 5.78 -26.73 -0.15 -1.40 16 6 C -0.14 -1.38 5.63 -26.73 -0.15 -1.53 16 7 C 0.09 0.89 2.92 -26.71 -0.08 0.81 16 8 H 0.06 0.51 7.79 -51.93 -0.40 0.11 16 9 O -0.35 -4.74 8.17 -55.14 -0.45 -5.19 16 10 C 0.04 0.54 6.23 36.00 0.22 0.77 16 11 C 0.51 8.52 7.35 -10.99 -0.08 8.44 16 12 O -0.52 -10.47 14.67 -14.36 -0.21 -10.68 16 13 N -0.69 -11.36 4.43 -49.08 -0.22 -11.58 16 14 C 0.13 2.39 0.66 -134.04 -0.09 2.30 16 15 C -0.11 -1.98 4.83 -26.73 -0.13 -2.10 16 16 C 0.08 1.24 6.71 37.16 0.25 1.49 16 17 O -0.58 -8.23 13.66 -35.23 -0.48 -8.72 16 18 C 0.17 3.69 6.81 -2.98 -0.02 3.67 16 19 N -0.61 -15.16 3.70 -177.73 -0.66 -15.82 16 20 C -0.22 -5.98 10.70 -15.06 -0.16 -6.14 16 21 H 0.08 2.12 7.83 -52.48 -0.41 1.71 16 22 C -0.01 -0.22 5.50 -17.43 -0.10 -0.31 16 23 N -0.92 -26.12 11.38 55.49 0.63 -25.49 16 24 Si 0.91 21.72 29.55 -169.99 -5.02 16.69 16 25 H -0.29 -6.79 7.11 56.52 0.40 -6.38 16 26 H -0.29 -6.94 7.11 56.52 0.40 -6.54 16 27 H -0.29 -6.69 7.11 56.52 0.40 -6.29 16 28 C 0.12 2.67 7.88 -2.98 -0.02 2.64 16 29 C -0.11 -0.99 4.95 -26.71 -0.13 -1.12 16 30 H 0.05 0.37 8.14 -51.93 -0.42 -0.05 16 31 H 0.05 0.45 8.14 -51.93 -0.42 0.03 16 32 H 0.05 0.44 8.14 -51.93 -0.42 0.02 16 33 H 0.06 0.56 8.14 -51.92 -0.42 0.14 16 34 H 0.06 0.47 8.14 -51.93 -0.42 0.05 16 35 H 0.07 0.99 7.68 -51.93 -0.40 0.59 16 36 H 0.06 0.57 8.14 -51.93 -0.42 0.14 16 37 H 0.06 0.65 7.87 -51.93 -0.41 0.25 16 38 H 0.07 0.56 8.14 -51.93 -0.42 0.14 16 39 H 0.08 0.92 7.87 -51.93 -0.41 0.51 16 40 H 0.07 0.72 8.09 -51.93 -0.42 0.30 16 41 H 0.40 5.95 8.67 -40.82 -0.35 5.60 16 42 H 0.08 1.50 7.00 -51.93 -0.36 1.13 16 43 H 0.08 1.34 7.96 -51.93 -0.41 0.92 16 44 H 0.05 0.65 8.14 -51.93 -0.42 0.23 16 45 H 0.04 0.55 7.68 -51.93 -0.40 0.15 16 46 H 0.37 3.39 9.12 45.56 0.42 3.81 16 47 H 0.04 0.94 7.97 -51.92 -0.41 0.53 16 48 H 0.08 1.80 7.11 -51.93 -0.37 1.43 16 49 H 0.25 7.02 8.31 -40.82 -0.34 6.68 16 50 H 0.05 1.13 7.65 -51.93 -0.40 0.73 16 51 H 0.04 0.91 8.10 -51.93 -0.42 0.49 16 52 H 0.07 0.55 8.14 -51.93 -0.42 0.13 16 53 H 0.07 0.64 8.14 -51.93 -0.42 0.22 16 LS Contribution 415.60 15.07 6.26 6.26 Total: -1.00 -33.05 415.60 -9.74 -42.79 By element: Atomic # 1 Polarization: 16.38 SS G_CDS: -8.93 Total: 7.45 kcal Atomic # 6 Polarization: 4.94 SS G_CDS: -0.67 Total: 4.27 kcal Atomic # 7 Polarization: -52.65 SS G_CDS: -0.24 Total: -52.89 kcal Atomic # 8 Polarization: -23.44 SS G_CDS: -1.14 Total: -24.59 kcal Atomic # 14 Polarization: 21.72 SS G_CDS: -5.02 Total: 16.69 kcal Total LS contribution 6.26 Total: 6.26 kcal Total: -33.05 -9.74 -42.79 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. ZINC001725206072.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 -54.289 kcal (2) G-P(sol) polarization free energy of solvation -33.050 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -87.339 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.745 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.795 kcal (6) G-S(sol) free energy of system = (1) + (5) -97.084 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.21 seconds