Wall clock time and date at job start Sat Apr 11 2020 06:08:33 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 N 2 2 C 1.31623 * 1 3 3 Si 1.86796 * 120.00307 * 2 1 4 4 H 1.48499 * 109.47282 * 239.99621 * 3 2 1 5 5 H 1.48497 * 109.47200 * 0.02562 * 3 2 1 6 6 H 1.48503 * 109.47280 * 119.99995 * 3 2 1 7 7 C 1.38806 * 119.99640 * 179.97438 * 2 1 3 8 8 H 1.08005 * 119.99918 * 180.02562 * 7 2 1 9 9 S 1.76193 * 120.00056 * 359.97438 * 7 2 1 10 10 C 1.81002 * 100.00049 * 180.02562 * 9 7 2 11 11 C 1.50701 * 109.47156 * 180.02562 * 10 9 7 12 12 O 1.21280 * 119.99781 * 0.02562 * 11 10 9 13 13 N 1.34780 * 119.99795 * 179.97438 * 11 10 9 14 14 C 1.46497 * 119.99566 * 180.02562 * 13 11 10 15 15 C 1.52997 * 109.46983 * 180.02562 * 14 13 11 16 16 H 1.09005 * 110.27652 * 52.90966 * 15 14 13 17 17 C 1.54601 * 110.30898 * 290.71733 * 15 14 13 18 18 C 1.54938 * 102.92204 * 219.12371 * 17 15 14 19 19 N 1.48533 * 103.22542 * 37.41425 * 18 17 15 20 20 C 1.46905 * 111.00196 * 200.27722 * 19 18 17 21 21 C 1.53008 * 109.46832 * 307.39786 * 20 19 18 22 22 C 1.52998 * 109.47100 * 294.99874 * 21 20 19 23 23 C 1.52996 * 109.46910 * 180.02562 * 22 21 20 24 24 C 1.52998 * 109.47171 * 60.00089 * 23 22 21 25 25 C 1.52998 * 109.47131 * 299.99776 * 24 23 22 26 26 C 1.53000 * 109.46671 * 174.99707 * 21 20 19 27 27 C 1.47904 * 105.82183 * 320.79232 * 19 18 17 28 28 H 0.97010 * 119.99946 * 0.02562 * 1 2 3 29 29 H 1.09002 * 109.47115 * 60.00094 * 10 9 7 30 30 H 1.09001 * 109.46925 * 300.00251 * 10 9 7 31 31 H 0.96995 * 120.00011 * 0.02562 * 13 11 10 32 32 H 1.09001 * 109.47487 * 300.00114 * 14 13 11 33 33 H 1.09002 * 109.47182 * 60.00342 * 14 13 11 34 34 H 1.08992 * 110.72140 * 337.48167 * 17 15 14 35 35 H 1.09003 * 110.72439 * 100.76530 * 17 15 14 36 36 H 1.08991 * 110.66863 * 278.98068 * 18 17 15 37 37 H 1.09003 * 110.80684 * 155.91402 * 18 17 15 38 38 H 1.08994 * 109.46903 * 67.39627 * 20 19 18 39 39 H 1.08995 * 109.47354 * 187.40190 * 20 19 18 40 40 H 1.08998 * 109.46797 * 54.99809 * 21 20 19 41 41 H 1.09004 * 109.46639 * 299.99968 * 22 21 20 42 42 H 1.08997 * 109.47489 * 59.99793 * 22 21 20 43 43 H 1.08995 * 109.47040 * 299.99362 * 23 22 21 44 44 H 1.09009 * 109.46676 * 179.97438 * 23 22 21 45 45 H 1.09003 * 109.46819 * 180.02562 * 24 23 22 46 46 H 1.08995 * 109.47732 * 59.99697 * 24 23 22 47 47 H 1.09007 * 109.47133 * 300.00421 * 25 24 23 48 48 H 1.08997 * 109.47489 * 180.02562 * 25 24 23 49 49 H 1.08998 * 109.47057 * 299.99641 * 26 21 20 50 50 H 1.08995 * 109.46940 * 60.00364 * 26 21 20 51 51 H 1.09001 * 109.91575 * 265.97461 * 27 19 18 52 52 H 1.09004 * 109.91707 * 144.68469 * 27 19 18 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 7 0.0000 0.0000 0.0000 2 6 1.3162 0.0000 0.0000 3 14 2.2503 1.6177 0.0000 4 1 3.1041 1.6963 -1.2124 5 1 1.2854 2.7464 0.0006 6 1 3.1041 1.6963 1.2125 7 6 2.0102 -1.2021 0.0005 8 1 3.0902 -1.2022 0.0010 9 16 1.1291 -2.7280 0.0019 10 6 2.5156 -3.8915 0.0029 11 6 1.9871 -5.3028 0.0036 12 8 0.7908 -5.5023 0.0029 13 7 2.8438 -6.3432 0.0039 14 6 2.3300 -7.7151 0.0039 15 6 3.5019 -8.6987 0.0049 16 1 4.1872 -8.4689 0.8209 17 6 4.2435 -8.6511 -1.3508 18 6 4.5859 -10.1396 -1.6109 19 7 3.3900 -10.8576 -1.1004 20 6 3.7024 -12.2644 -0.8154 21 6 4.3490 -12.9028 -2.0464 22 6 3.3375 -12.9371 -3.1938 23 6 3.9840 -13.5760 -4.4246 24 6 4.4220 -15.0028 -4.0879 25 6 5.4335 -14.9684 -2.9405 26 6 4.7875 -14.3295 -1.7101 27 6 2.9865 -10.1443 0.1308 28 1 -0.4850 0.8401 -0.0004 29 1 3.1242 -3.7307 0.8928 30 1 3.1243 -3.7322 -0.8872 31 1 3.8006 -6.1837 0.0041 32 1 1.7211 -7.8751 0.8938 33 1 1.7216 -7.8753 -0.8862 34 1 3.5919 -8.2627 -2.1334 35 1 5.1523 -8.0542 -1.2726 36 1 5.4766 -10.4323 -1.0551 37 1 4.7205 -10.3255 -2.6765 38 1 4.3916 -12.3201 0.0271 39 1 2.7842 -12.7979 -0.5696 40 1 5.2179 -12.3165 -2.3455 41 1 2.4686 -13.5234 -2.8946 42 1 3.0251 -11.9208 -3.4334 43 1 4.8530 -12.9901 -4.7239 44 1 3.2631 -13.6009 -5.2419 45 1 4.8829 -15.4577 -4.9646 46 1 3.5530 -15.5886 -3.7886 47 1 6.3026 -14.3825 -3.2398 48 1 5.7459 -15.9848 -2.7009 49 1 5.5082 -14.3049 -0.8927 50 1 3.9186 -14.9156 -1.4110 51 1 3.4342 -10.6237 1.0014 52 1 1.9002 -10.1446 0.2211 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 ZINC001753118290.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 06:08:33 Heat of formation + Delta-G solvation = -67.565649 kcal Electronic energy + Delta-G solvation = -26745.849498 eV Core-core repulsion = 23062.710244 eV Total energy + Delta-G solvation = -3683.139254 eV No. of doubly occupied orbitals = 63 Molecular weight (most abundant/longest-lived isotopes) = 340.193 amu Computer time = 0.88 seconds Orbital eigenvalues (eV) -40.14737 -39.13736 -38.24780 -35.08019 -33.07727 -32.41393 -31.15365 -30.70365 -29.92717 -28.83333 -25.90462 -25.44074 -24.34720 -22.91703 -22.40500 -20.85055 -20.65773 -20.11955 -19.78956 -17.81884 -16.67458 -16.38965 -16.02786 -15.78947 -15.42363 -15.13617 -14.79273 -14.73475 -14.45753 -14.33595 -14.18373 -13.89949 -13.75977 -13.29169 -13.06558 -12.92735 -12.58415 -12.55637 -12.48991 -12.12054 -12.04741 -11.83626 -11.69103 -11.50085 -11.47229 -11.27771 -11.06601 -11.03103 -11.02371 -10.89243 -10.75252 -10.72255 -10.39327 -10.38095 -9.80762 -9.36314 -9.04909 -8.83592 -8.71277 -8.21836 -6.48148 -6.19992 -3.90485 3.06134 3.14434 3.24415 3.28588 3.32518 3.61603 3.74282 4.17734 4.22052 4.30897 4.33597 4.41562 4.43476 4.57961 4.71999 4.87997 4.93070 4.95949 5.05652 5.11122 5.11653 5.14891 5.15433 5.15871 5.22227 5.26916 5.27762 5.34508 5.41250 5.50954 5.54397 5.56689 5.60829 5.66215 5.72778 5.75944 5.77836 5.79792 5.81983 5.89808 5.92842 5.93122 6.02660 6.08115 6.13458 6.15949 6.56944 6.65957 6.72548 7.60549 7.75023 8.36389 8.65838 9.25052 10.87365 Molecular weight = 340.19amu Principal moments of inertia in cm(-1) A = 0.031557 B = 0.001530 C = 0.001517 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 887.082927 B =18299.521660 C =18447.909635 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 N -0.868 5.868 2 C 0.074 3.926 3 Si 0.919 3.081 4 H -0.274 1.274 5 H -0.283 1.283 6 H -0.274 1.274 7 C -0.537 4.537 8 H 0.072 0.928 9 S -0.060 6.060 10 C -0.153 4.153 11 C 0.531 3.469 12 O -0.518 6.518 13 N -0.738 5.738 14 C 0.132 3.868 15 C -0.109 4.109 16 H 0.081 0.919 17 C -0.121 4.121 18 C 0.035 3.965 19 N -0.512 5.512 20 C 0.050 3.950 21 C -0.087 4.087 22 C -0.107 4.107 23 C -0.122 4.122 24 C -0.120 4.120 25 C -0.118 4.118 26 C -0.114 4.114 27 C 0.044 3.956 28 H 0.269 0.731 29 H 0.089 0.911 30 H 0.089 0.911 31 H 0.397 0.603 32 H 0.065 0.935 33 H 0.071 0.929 34 H 0.081 0.919 35 H 0.072 0.928 36 H 0.042 0.958 37 H 0.083 0.917 38 H 0.034 0.966 39 H 0.076 0.924 40 H 0.071 0.929 41 H 0.059 0.941 42 H 0.074 0.926 43 H 0.059 0.941 44 H 0.060 0.940 45 H 0.058 0.942 46 H 0.060 0.940 47 H 0.060 0.940 48 H 0.059 0.941 49 H 0.058 0.942 50 H 0.062 0.938 51 H 0.047 0.953 52 H 0.085 0.915 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 13.824 -30.769 -4.120 33.982 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 N -0.503 5.503 2 C -0.135 4.135 3 Si 0.745 3.255 4 H -0.200 1.200 5 H -0.208 1.208 6 H -0.200 1.200 7 C -0.685 4.685 8 H 0.090 0.910 9 S 0.167 5.833 10 C -0.304 4.304 11 C 0.317 3.683 12 O -0.392 6.392 13 N -0.393 5.393 14 C 0.008 3.992 15 C -0.129 4.129 16 H 0.099 0.901 17 C -0.159 4.159 18 C -0.092 4.092 19 N -0.236 5.236 20 C -0.078 4.078 21 C -0.105 4.105 22 C -0.144 4.144 23 C -0.159 4.159 24 C -0.158 4.158 25 C -0.156 4.156 26 C -0.152 4.152 27 C -0.084 4.084 28 H 0.079 0.921 29 H 0.107 0.893 30 H 0.107 0.893 31 H 0.230 0.770 32 H 0.083 0.917 33 H 0.089 0.911 34 H 0.100 0.900 35 H 0.091 0.909 36 H 0.061 0.939 37 H 0.101 0.899 38 H 0.052 0.948 39 H 0.094 0.906 40 H 0.089 0.911 41 H 0.078 0.922 42 H 0.093 0.907 43 H 0.077 0.923 44 H 0.079 0.921 45 H 0.077 0.923 46 H 0.079 0.921 47 H 0.079 0.921 48 H 0.078 0.922 49 H 0.077 0.923 50 H 0.081 0.919 51 H 0.065 0.935 52 H 0.103 0.897 Dipole moment (debyes) X Y Z Total from point charges 11.204 -31.013 -4.495 33.280 hybrid contribution 3.151 1.255 0.700 3.463 sum 14.355 -29.758 -3.794 33.257 Atomic orbital electron populations 1.70010 1.05951 1.27543 1.46767 1.24986 0.95019 0.98995 0.94538 0.86227 0.79237 0.81271 0.78775 1.19952 1.20805 1.19967 1.22836 0.94876 0.91722 1.59069 0.91000 1.85399 1.04966 0.96264 1.96714 1.23531 1.06525 0.95501 1.04842 1.20294 0.86537 0.86278 0.75202 1.90704 1.15385 1.85626 1.47500 1.45990 1.09828 1.05555 1.77926 1.21339 0.95085 0.80251 1.02512 1.22245 0.97321 0.94714 0.98594 0.90110 1.22623 1.00398 0.95936 0.96964 1.23229 0.91792 0.93376 1.00829 1.64805 1.30992 1.01530 1.26292 1.22380 0.99793 0.89253 0.96348 1.21246 0.98536 0.95652 0.95086 1.21491 0.97453 1.01608 0.93871 1.21565 1.00449 0.95884 0.98016 1.21544 0.99006 0.97200 0.98028 1.21499 0.98309 1.00413 0.95335 1.21550 1.00415 0.95709 0.97559 1.22848 1.01852 0.92396 0.91353 0.92137 0.89311 0.89276 0.76985 0.91703 0.91116 0.90039 0.90920 0.93944 0.89913 0.94820 0.90592 0.91086 0.92245 0.90747 0.92258 0.92114 0.92338 0.92089 0.92149 0.92191 0.92288 0.91895 0.93485 0.89660 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 N -0.87 -26.29 13.22 55.49 0.73 -25.56 16 2 C 0.07 2.12 5.49 -17.43 -0.10 2.02 16 3 Si 0.92 21.46 29.55 -169.99 -5.02 16.44 16 4 H -0.27 -6.24 7.11 56.52 0.40 -5.84 16 5 H -0.28 -6.49 7.11 56.52 0.40 -6.08 16 6 H -0.27 -6.25 7.11 56.52 0.40 -5.84 16 7 C -0.54 -15.38 9.50 30.94 0.29 -15.09 16 8 H 0.07 1.94 7.80 -52.48 -0.41 1.53 16 9 S -0.06 -1.64 20.57 -107.50 -2.21 -3.86 16 10 C -0.15 -3.11 6.16 36.01 0.22 -2.89 16 11 C 0.53 10.00 7.85 -10.98 -0.09 9.91 16 12 O -0.52 -11.97 15.86 5.56 0.09 -11.89 16 13 N -0.74 -9.79 5.43 -60.30 -0.33 -10.12 16 14 C 0.13 1.54 4.76 -4.04 -0.02 1.52 16 15 C -0.11 -0.91 3.03 -89.26 -0.27 -1.18 16 16 H 0.08 0.61 8.14 -51.93 -0.42 0.19 16 17 C -0.12 -0.95 6.41 -24.87 -0.16 -1.11 16 18 C 0.04 0.26 5.09 -1.90 -0.01 0.25 16 19 N -0.51 -4.10 4.85 -230.45 -1.12 -5.22 16 20 C 0.05 0.35 4.42 -3.82 -0.02 0.33 16 21 C -0.09 -0.53 1.87 -90.62 -0.17 -0.70 16 22 C -0.11 -0.72 5.09 -26.73 -0.14 -0.86 16 23 C -0.12 -0.74 5.92 -26.73 -0.16 -0.90 16 24 C -0.12 -0.66 5.92 -26.73 -0.16 -0.82 16 25 C -0.12 -0.62 5.92 -26.76 -0.16 -0.78 16 26 C -0.11 -0.62 5.20 -26.75 -0.14 -0.76 16 27 C 0.04 0.35 6.36 -2.75 -0.02 0.34 16 28 H 0.27 7.58 8.31 -40.82 -0.34 7.24 16 29 H 0.09 1.66 8.14 -51.92 -0.42 1.24 16 30 H 0.09 1.67 8.14 -51.92 -0.42 1.24 16 31 H 0.40 4.09 8.41 -40.82 -0.34 3.75 16 32 H 0.06 0.81 8.14 -51.93 -0.42 0.39 16 33 H 0.07 0.93 8.00 -51.93 -0.42 0.52 16 34 H 0.08 0.76 7.76 -51.93 -0.40 0.36 16 35 H 0.07 0.49 8.14 -51.93 -0.42 0.07 16 36 H 0.04 0.29 8.01 -51.93 -0.42 -0.12 16 37 H 0.08 0.60 7.55 -51.93 -0.39 0.21 16 38 H 0.03 0.23 7.81 -51.93 -0.41 -0.18 16 39 H 0.08 0.54 8.14 -51.93 -0.42 0.11 16 40 H 0.07 0.47 6.51 -51.93 -0.34 0.13 16 41 H 0.06 0.42 8.14 -51.93 -0.42 0.00 16 42 H 0.07 0.60 7.75 -51.93 -0.40 0.20 16 43 H 0.06 0.37 8.14 -51.93 -0.42 -0.06 16 44 H 0.06 0.37 8.14 -51.92 -0.42 -0.05 16 45 H 0.06 0.30 8.14 -51.93 -0.42 -0.13 16 46 H 0.06 0.34 8.14 -51.93 -0.42 -0.08 16 47 H 0.06 0.33 8.14 -51.93 -0.42 -0.10 16 48 H 0.06 0.29 8.14 -51.93 -0.42 -0.14 16 49 H 0.06 0.31 8.14 -51.93 -0.42 -0.11 16 50 H 0.06 0.35 8.14 -51.93 -0.42 -0.07 16 51 H 0.05 0.35 7.57 -51.93 -0.39 -0.05 16 52 H 0.09 0.74 7.68 -51.93 -0.40 0.34 16 LS Contribution 415.11 15.07 6.26 6.26 Total: -1.00 -33.52 415.11 -12.48 -45.99 By element: Atomic # 1 Polarization: 8.46 SS G_CDS: -9.79 Total: -1.34 kcal Atomic # 6 Polarization: -9.63 SS G_CDS: -1.08 Total: -10.71 kcal Atomic # 7 Polarization: -40.18 SS G_CDS: -0.71 Total: -40.89 kcal Atomic # 8 Polarization: -11.97 SS G_CDS: 0.09 Total: -11.89 kcal Atomic # 14 Polarization: 21.46 SS G_CDS: -5.02 Total: 16.44 kcal Atomic # 16 Polarization: -1.64 SS G_CDS: -2.21 Total: -3.86 kcal Total LS contribution 6.26 Total: 6.26 kcal Total: -33.52 -12.48 -45.99 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. ZINC001753118290.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 -21.573 kcal (2) G-P(sol) polarization free energy of solvation -33.517 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -55.090 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -12.476 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.993 kcal (6) G-S(sol) free energy of system = (1) + (5) -67.566 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.88 seconds