Wall clock time and date at job start Wed Apr 1 2020 01:57:08 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 1.50698 * 1 3 3 C 1.38257 * 119.99906 * 2 1 4 4 C 1.38217 * 120.00171 * 180.02562 * 3 2 1 5 5 C 1.38256 * 119.99738 * 359.94872 * 4 3 2 6 6 C 1.38205 * 120.00087 * 359.86101 * 5 4 3 7 7 C 1.38211 * 120.00444 * 180.02562 * 2 1 3 8 8 C 1.50705 * 119.99788 * 359.97438 * 7 2 1 9 9 C 1.50701 * 109.46579 * 85.00117 * 8 7 2 10 10 O 1.21282 * 120.00507 * 0.02562 * 9 8 7 11 11 N 1.34779 * 119.99603 * 180.02562 * 9 8 7 12 12 C 1.47063 * 120.83936 * 355.23218 * 11 9 8 13 13 C 1.53129 * 109.05670 * 126.57203 * 12 11 9 14 14 C 1.53151 * 109.60692 * 53.99474 * 13 12 11 15 15 C 1.52811 * 109.25856 * 299.14314 * 14 13 12 16 16 H 1.09000 * 109.46401 * 302.02716 * 15 14 13 17 17 C 1.53056 * 110.36096 * 181.51323 * 15 14 13 18 18 N 1.47070 * 108.32356 * 184.49194 * 17 15 14 19 19 C 1.36936 * 120.47334 * 233.35344 * 18 17 15 20 20 H 1.07995 * 120.00778 * 13.91177 * 19 18 17 21 21 C 1.38819 * 119.99843 * 193.91574 * 19 18 17 22 22 N 1.31618 * 120.00169 * 36.66523 * 21 19 18 23 23 Si 1.86796 * 119.99864 * 216.67431 * 21 19 18 24 24 H 1.48502 * 109.47243 * 84.99484 * 23 21 19 25 25 H 1.48499 * 109.47045 * 204.99402 * 23 21 19 26 26 H 1.48500 * 109.47292 * 324.99715 * 23 21 19 27 27 C 1.46862 * 119.04491 * 53.32746 * 18 17 15 28 28 C 1.53289 * 109.30795 * 307.49761 * 27 18 17 29 29 C 1.46725 * 120.83848 * 175.21641 * 11 9 8 30 30 H 1.08995 * 109.54215 * 114.77342 * 29 11 9 31 31 H 1.09004 * 109.47117 * 269.98104 * 1 2 3 32 32 H 1.08997 * 109.47403 * 29.98354 * 1 2 3 33 33 H 1.08998 * 109.46874 * 149.97965 * 1 2 3 34 34 H 1.08004 * 120.00409 * 359.97205 * 3 2 1 35 35 H 1.07999 * 120.00373 * 179.97438 * 4 3 2 36 36 H 1.08001 * 119.99861 * 180.02562 * 5 4 3 37 37 H 1.08005 * 120.00310 * 180.21308 * 6 5 4 38 38 H 1.08996 * 109.46830 * 325.00552 * 8 7 2 39 39 H 1.08997 * 109.47141 * 204.99970 * 8 7 2 40 40 H 1.09006 * 109.53816 * 246.43925 * 12 11 9 41 41 H 1.08998 * 109.53924 * 6.61106 * 12 11 9 42 42 H 1.08997 * 109.44627 * 174.03567 * 13 12 11 43 43 H 1.08994 * 109.44502 * 293.95586 * 13 12 11 44 44 H 1.08999 * 109.50696 * 59.07893 * 14 13 12 45 45 H 1.08999 * 109.50928 * 179.20745 * 14 13 12 46 46 H 1.09003 * 109.69001 * 304.19960 * 17 15 14 47 47 H 1.08994 * 109.69086 * 64.78015 * 17 15 14 48 48 H 0.96996 * 119.99986 * 179.97438 * 22 21 19 49 49 H 1.09000 * 109.52830 * 67.24613 * 27 18 17 50 50 H 1.09010 * 109.52794 * 187.45768 * 27 18 17 51 51 H 1.08996 * 109.15258 * 294.11692 * 28 27 18 52 52 H 1.09005 * 109.95990 * 173.80752 * 28 27 18 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 1.5070 0.0000 0.0000 3 6 2.1983 1.1974 0.0000 4 6 3.5804 1.1974 -0.0005 5 6 4.2717 0.0001 0.0000 6 6 3.5807 -1.1968 0.0040 7 6 2.1981 -1.1969 -0.0005 8 6 1.4447 -2.5021 -0.0005 9 6 1.0858 -2.8748 -1.4159 10 8 1.4103 -2.1521 -2.3343 11 7 0.4042 -4.0113 -1.6613 12 6 0.0920 -4.9525 -0.5753 13 6 -1.4135 -5.2321 -0.5732 14 6 -1.8510 -5.7012 -1.9639 15 6 -1.5555 -4.6015 -2.9829 16 1 -2.0752 -3.6884 -2.6928 17 6 -2.0179 -5.0297 -4.3777 18 7 -1.6162 -3.9902 -5.3374 19 6 -2.5391 -3.4269 -6.1777 20 1 -3.5938 -3.5710 -5.9961 21 6 -2.1187 -2.6706 -7.2633 22 7 -1.0383 -3.0190 -7.9293 23 14 -3.0865 -1.1584 -7.7787 24 1 -2.6448 0.0097 -6.9752 25 1 -2.8496 -0.8863 -9.2192 26 1 -4.5347 -1.3962 -7.5516 27 6 -0.2113 -3.5647 -5.3810 28 6 0.2456 -3.1792 -3.9695 29 6 -0.0455 -4.3406 -3.0185 30 1 0.4709 -5.2350 -3.3668 31 1 -0.3633 -0.0003 1.0277 32 1 -0.3634 0.8901 -0.5136 33 1 -0.3633 -0.8898 -0.5141 34 1 1.6583 2.1327 -0.0005 35 1 4.1204 2.1327 -0.0010 36 1 5.3517 0.0001 0.0000 37 1 4.1207 -2.1322 0.0079 38 1 0.5342 -2.3959 0.5892 39 1 2.0698 -3.2825 0.4333 40 1 0.6355 -5.8842 -0.7329 41 1 0.3846 -4.5169 0.3801 42 1 -1.6375 -6.0080 0.1587 43 1 -1.9514 -4.3208 -0.3117 44 1 -1.3022 -6.6037 -2.2329 45 1 -2.9202 -5.9132 -1.9569 46 1 -1.5499 -5.9772 -4.6450 47 1 -3.1023 -5.1395 -4.3875 48 1 -0.7448 -2.4908 -8.6880 49 1 0.4063 -4.3841 -5.7488 50 1 -0.1113 -2.7054 -6.0443 51 1 -0.3035 -2.2954 -3.6448 52 1 1.3148 -2.9668 -3.9695 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 ZINC001021729912.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 01:57:08 Heat of formation + Delta-G solvation = 21.417586 kcal Electronic energy + Delta-G solvation = -31505.746409 eV Core-core repulsion = 27663.710328 eV Total energy + Delta-G solvation = -3842.036081 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 3.70 seconds Orbital eigenvalues (eV) -40.65552 -39.38219 -37.58545 -35.85982 -33.50892 -32.96936 -32.50694 -32.06795 -30.18444 -29.45712 -28.00739 -26.68332 -25.54445 -24.58502 -22.58080 -22.53718 -21.99250 -21.05889 -20.25817 -19.38345 -18.75377 -16.79893 -16.49904 -16.41139 -15.97511 -15.66531 -14.91115 -14.83161 -14.60576 -14.38182 -14.18135 -13.85094 -13.63524 -13.44704 -13.18810 -13.15401 -12.93575 -12.81651 -12.59604 -12.32500 -12.28002 -12.09405 -11.98398 -11.88300 -11.40666 -11.19009 -11.04860 -10.99362 -10.93006 -10.90760 -10.77538 -10.49432 -10.30662 -10.20702 -9.93136 -9.73468 -9.40231 -8.87849 -8.68194 -8.50099 -8.26131 -8.16448 -6.81645 -5.81450 -2.96497 1.31848 1.39491 2.85239 3.17333 3.46542 3.55145 3.56955 3.76377 4.56067 4.58222 4.68355 4.73758 4.82662 4.92598 4.93013 4.98232 5.05844 5.14949 5.27455 5.29045 5.31709 5.33135 5.43147 5.48872 5.52051 5.58852 5.64468 5.67581 5.70367 5.81542 5.86945 5.91960 6.01703 6.04975 6.12293 6.15798 6.23696 6.37885 6.39317 6.44259 6.48219 6.52907 6.62756 6.68984 6.75316 6.92006 6.98715 7.00111 7.20936 7.50102 7.65431 7.71599 7.89462 8.39573 8.49827 9.21959 9.92692 10.44132 11.27781 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.010402 B = 0.003828 C = 0.003128 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2691.095046 B = 7312.752213 C = 8949.344186 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.117 4.117 2 C -0.066 4.066 3 C -0.121 4.121 4 C -0.119 4.119 5 C -0.127 4.127 6 C -0.105 4.105 7 C -0.063 4.063 8 C -0.106 4.106 9 C 0.512 3.488 10 O -0.512 6.512 11 N -0.611 5.611 12 C 0.107 3.893 13 C -0.133 4.133 14 C -0.113 4.113 15 C -0.113 4.113 16 H 0.070 0.930 17 C 0.157 3.843 18 N -0.593 5.593 19 C -0.262 4.262 20 H 0.071 0.929 21 C 0.008 3.992 22 N -0.880 5.880 23 Si 0.875 3.125 24 H -0.288 1.288 25 H -0.294 1.294 26 H -0.280 1.280 27 C 0.158 3.842 28 C -0.125 4.125 29 C 0.159 3.841 30 H 0.062 0.938 31 H 0.068 0.932 32 H 0.068 0.932 33 H 0.067 0.933 34 H 0.120 0.880 35 H 0.119 0.881 36 H 0.119 0.881 37 H 0.118 0.882 38 H 0.099 0.901 39 H 0.096 0.904 40 H 0.066 0.934 41 H 0.078 0.922 42 H 0.070 0.930 43 H 0.064 0.936 44 H 0.061 0.939 45 H 0.064 0.936 46 H 0.017 0.983 47 H 0.056 0.944 48 H 0.254 0.746 49 H 0.011 0.989 50 H 0.090 0.910 51 H 0.059 0.941 52 H 0.083 0.917 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 6.425 -0.653 22.371 23.284 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 -0.174 4.174 2 C -0.066 4.066 3 C -0.139 4.139 4 C -0.137 4.137 5 C -0.145 4.145 6 C -0.123 4.123 7 C -0.063 4.063 8 C -0.145 4.145 9 C 0.300 3.700 10 O -0.387 6.387 11 N -0.345 5.345 12 C -0.016 4.016 13 C -0.171 4.171 14 C -0.152 4.152 15 C -0.135 4.135 16 H 0.089 0.911 17 C 0.030 3.970 18 N -0.316 5.316 19 C -0.390 4.390 20 H 0.089 0.911 21 C -0.191 4.191 22 N -0.523 5.523 23 Si 0.705 3.295 24 H -0.215 1.215 25 H -0.221 1.221 26 H -0.206 1.206 27 C 0.031 3.969 28 C -0.164 4.164 29 C 0.057 3.943 30 H 0.080 0.920 31 H 0.087 0.913 32 H 0.087 0.913 33 H 0.086 0.914 34 H 0.138 0.862 35 H 0.137 0.863 36 H 0.137 0.863 37 H 0.136 0.864 38 H 0.117 0.883 39 H 0.114 0.886 40 H 0.085 0.915 41 H 0.097 0.903 42 H 0.089 0.911 43 H 0.083 0.917 44 H 0.080 0.920 45 H 0.082 0.918 46 H 0.035 0.965 47 H 0.074 0.926 48 H 0.064 0.936 49 H 0.029 0.971 50 H 0.108 0.892 51 H 0.077 0.923 52 H 0.101 0.899 Dipole moment (debyes) X Y Z Total from point charges 6.667 -0.208 21.690 22.693 hybrid contribution -0.474 0.702 -0.267 0.888 sum 6.193 0.494 21.423 22.306 Atomic orbital electron populations 1.20830 0.91383 1.03467 1.01709 1.19699 0.95922 0.92581 0.98400 1.20984 0.94287 0.97345 1.01247 1.21084 0.94297 0.97938 1.00388 1.21032 0.99623 0.92513 1.01316 1.20937 0.93378 0.98110 0.99840 1.19149 0.93390 0.93203 1.00583 1.20795 1.01573 0.96069 0.96113 1.20384 0.78222 0.80825 0.90599 1.90803 1.52436 1.50954 1.44536 1.48321 1.55683 1.20970 1.09568 1.21710 0.96278 0.93458 0.90200 1.21898 0.95410 1.01610 0.98174 1.21513 1.01161 0.98587 0.93899 1.22077 0.95541 0.98507 0.97338 0.91132 1.20814 0.97881 0.91085 0.87216 1.44282 1.05840 1.41822 1.39611 1.19135 0.88584 1.26347 1.04934 0.91073 1.24595 0.97651 1.01325 0.95524 1.70318 1.27362 1.36658 1.17947 0.86681 0.79988 0.85918 0.76947 1.21519 1.22056 1.20555 1.21064 0.83406 0.99416 0.92976 1.22636 1.02232 0.95710 0.95859 1.21302 0.93856 0.99055 0.80040 0.91982 0.91338 0.91336 0.91428 0.86236 0.86334 0.86306 0.86388 0.88302 0.88608 0.91549 0.90318 0.91150 0.91685 0.92033 0.91751 0.96477 0.92563 0.93640 0.97053 0.89162 0.92269 0.89896 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 20. 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 -0.12 -1.35 9.22 36.00 0.33 -1.02 16 2 C -0.07 -0.84 5.88 -104.63 -0.62 -1.46 16 3 C -0.12 -1.43 9.70 -39.58 -0.38 -1.82 16 4 C -0.12 -1.32 10.05 -39.58 -0.40 -1.72 16 5 C -0.13 -1.41 10.05 -39.59 -0.40 -1.81 16 6 C -0.10 -1.24 9.68 -39.59 -0.38 -1.62 16 7 C -0.06 -0.79 4.37 -104.62 -0.46 -1.25 16 8 C -0.11 -1.16 3.51 -29.03 -0.10 -1.26 16 9 C 0.51 7.73 6.81 -10.98 -0.07 7.65 16 10 O -0.51 -9.95 11.69 5.56 0.06 -9.88 16 11 N -0.61 -8.69 2.97 -165.30 -0.49 -9.18 16 12 C 0.11 1.06 6.35 -3.67 -0.02 1.04 16 13 C -0.13 -1.31 6.07 -26.59 -0.16 -1.47 16 14 C -0.11 -1.42 5.24 -26.75 -0.14 -1.56 16 15 C -0.11 -1.93 2.21 -90.54 -0.20 -2.13 16 16 H 0.07 1.33 8.14 -51.93 -0.42 0.91 16 17 C 0.16 3.24 5.86 -3.70 -0.02 3.22 16 18 N -0.59 -15.17 3.04 -172.28 -0.52 -15.69 16 19 C -0.26 -7.38 9.57 -15.06 -0.14 -7.53 16 20 H 0.07 1.97 7.94 -52.49 -0.42 1.55 16 21 C 0.01 0.24 4.51 -17.43 -0.08 0.17 16 22 N -0.88 -26.35 11.59 55.49 0.64 -25.70 16 23 Si 0.88 22.24 29.68 -169.99 -5.04 17.20 16 24 H -0.29 -7.42 7.11 56.52 0.40 -7.02 16 25 H -0.29 -7.49 7.11 56.52 0.40 -7.09 16 26 H -0.28 -6.94 7.11 56.52 0.40 -6.54 16 27 C 0.16 3.98 5.58 -3.70 -0.02 3.96 16 28 C -0.13 -2.70 3.83 -26.63 -0.10 -2.81 16 29 C 0.16 2.80 2.63 -67.71 -0.18 2.62 16 30 H 0.06 1.11 8.14 -51.93 -0.42 0.69 16 31 H 0.07 0.63 8.14 -51.93 -0.42 0.20 16 32 H 0.07 0.78 8.09 -51.93 -0.42 0.36 16 33 H 0.07 0.88 6.16 -51.93 -0.32 0.56 16 34 H 0.12 1.20 8.06 -52.48 -0.42 0.78 16 35 H 0.12 1.04 8.06 -52.49 -0.42 0.61 16 36 H 0.12 1.05 8.06 -52.49 -0.42 0.63 16 37 H 0.12 1.19 8.06 -52.48 -0.42 0.77 16 38 H 0.10 0.91 6.74 -51.93 -0.35 0.56 16 39 H 0.10 0.81 7.67 -51.93 -0.40 0.42 16 40 H 0.07 0.61 8.14 -51.93 -0.42 0.18 16 41 H 0.08 0.58 5.96 -51.93 -0.31 0.27 16 42 H 0.07 0.53 8.14 -51.93 -0.42 0.11 16 43 H 0.06 0.68 8.14 -51.93 -0.42 0.26 16 44 H 0.06 0.74 8.14 -51.93 -0.42 0.32 16 45 H 0.06 0.77 8.14 -51.93 -0.42 0.34 16 46 H 0.02 0.36 8.14 -51.93 -0.42 -0.07 16 47 H 0.06 1.13 7.87 -51.93 -0.41 0.73 16 48 H 0.25 7.34 8.31 -40.82 -0.34 7.00 16 49 H 0.01 0.30 8.14 -51.93 -0.42 -0.13 16 50 H 0.09 2.58 5.68 -51.92 -0.30 2.29 16 51 H 0.06 1.40 7.45 -51.93 -0.39 1.02 16 52 H 0.08 1.85 6.12 -51.93 -0.32 1.53 16 LS Contribution 393.02 15.07 5.92 5.92 Total: -1.00 -33.23 393.02 -11.66 -44.89 By element: Atomic # 1 Polarization: 9.93 SS G_CDS: -8.68 Total: 1.25 kcal Atomic # 6 Polarization: -5.25 SS G_CDS: -3.55 Total: -8.80 kcal Atomic # 7 Polarization: -50.20 SS G_CDS: -0.37 Total: -50.58 kcal Atomic # 8 Polarization: -9.95 SS G_CDS: 0.06 Total: -9.88 kcal Atomic # 14 Polarization: 22.24 SS G_CDS: -5.04 Total: 17.20 kcal Total LS contribution 5.92 Total: 5.92 kcal Total: -33.23 -11.66 -44.89 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. ZINC001021729912.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 66.307 kcal (2) G-P(sol) polarization free energy of solvation -33.234 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 33.073 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.656 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.890 kcal (6) G-S(sol) free energy of system = (1) + (5) 21.418 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 3.70 seconds