Wall clock time and date at job start Tue Mar 31 2020 19:43:20 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 1.31000 * 1 3 3 C 1.50692 * 120.00024 * 2 1 4 4 N 1.46502 * 109.47231 * 124.99996 * 3 2 1 5 5 C 1.46503 * 119.99807 * 274.66166 * 4 3 2 6 6 C 1.50700 * 109.47321 * 273.83556 * 5 4 3 7 7 H 1.08001 * 119.99498 * 0.02562 * 6 5 4 8 8 C 1.37874 * 119.99839 * 179.97438 * 6 5 4 9 9 N 1.31512 * 119.99990 * 0.02562 * 8 6 5 10 10 Si 1.86803 * 119.99941 * 180.02562 * 8 6 5 11 11 H 1.48499 * 109.47046 * 90.00471 * 10 8 6 12 12 H 1.48500 * 109.47216 * 210.00848 * 10 8 6 13 13 H 1.48499 * 109.47054 * 330.00541 * 10 8 6 14 14 C 1.34769 * 119.99990 * 94.66153 * 4 3 2 15 15 O 1.21282 * 120.00485 * 4.64484 * 14 4 3 16 16 C 1.50697 * 120.00052 * 184.64587 * 14 4 3 17 17 H 1.09003 * 109.47335 * 313.52871 * 16 14 4 18 18 C 1.53000 * 109.47175 * 73.53294 * 16 14 4 19 19 C 1.53007 * 109.47189 * 187.28674 * 18 16 14 20 20 C 1.53004 * 109.46851 * 171.73919 * 19 18 16 21 21 C 1.52999 * 109.47073 * 291.73698 * 19 18 16 22 22 N 1.46501 * 109.47262 * 193.52995 * 16 14 4 23 23 C 1.45750 * 117.94488 * 114.25773 * 22 16 14 24 24 C 1.53108 * 110.38792 * 160.74493 * 23 22 16 25 25 C 1.53345 * 108.52530 * 51.11212 * 24 23 22 26 26 C 1.53069 * 108.42813 * 292.31167 * 25 24 23 27 27 C 1.33347 * 117.94751 * 294.51696 * 22 16 14 28 28 O 1.21281 * 118.24970 * 2.20233 * 27 22 16 29 29 H 1.08004 * 119.99851 * 0.02562 * 1 2 3 30 30 H 1.08001 * 120.00728 * 179.97438 * 1 2 3 31 31 H 1.08004 * 119.99558 * 180.02562 * 2 1 3 32 32 H 1.09007 * 109.47213 * 4.99739 * 3 2 1 33 33 H 1.09004 * 109.47114 * 244.99954 * 3 2 1 34 34 H 1.09006 * 109.47100 * 33.84122 * 5 4 3 35 35 H 1.09006 * 109.46813 * 153.83401 * 5 4 3 36 36 H 0.97007 * 119.99974 * 179.97438 * 9 8 6 37 37 H 1.09000 * 109.46798 * 307.28621 * 18 16 14 38 38 H 1.08999 * 109.47558 * 67.28524 * 18 16 14 39 39 H 1.09005 * 109.46789 * 51.74009 * 19 18 16 40 40 H 1.08994 * 109.47199 * 59.99977 * 20 19 18 41 41 H 1.09001 * 109.46543 * 180.02562 * 20 19 18 42 42 H 1.08999 * 109.46835 * 299.99658 * 20 19 18 43 43 H 1.09000 * 109.47112 * 189.27288 * 21 19 18 44 44 H 1.08998 * 109.47287 * 309.27653 * 21 19 18 45 45 H 1.09007 * 109.46931 * 69.27316 * 21 19 18 46 46 H 1.09000 * 109.30351 * 281.23531 * 23 22 16 47 47 H 1.08999 * 109.30667 * 40.61639 * 23 22 16 48 48 H 1.08996 * 109.80518 * 291.32657 * 24 23 22 49 49 H 1.09001 * 109.68028 * 170.82202 * 24 23 22 50 50 H 1.08998 * 109.67178 * 172.57851 * 25 24 23 51 51 H 1.08999 * 109.67328 * 52.04731 * 25 24 23 52 52 H 1.09006 * 109.39843 * 288.77671 * 26 25 24 53 53 H 1.08997 * 109.33478 * 168.98577 * 26 25 24 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 1.3100 0.0000 0.0000 3 6 2.0635 1.3050 0.0000 4 7 2.9937 1.3318 1.1314 5 6 2.5302 1.7691 2.4506 6 6 2.6346 3.2694 2.5479 7 1 3.0084 3.8400 1.7106 8 6 2.2519 3.9134 3.7053 9 7 1.7963 3.2184 4.7246 10 14 2.3806 5.7731 3.8257 11 1 1.1122 6.3883 3.3589 12 1 2.6293 6.1618 5.2372 13 1 3.5027 6.2476 2.9766 14 6 4.2759 0.9542 0.9587 15 8 4.6813 0.6730 -0.1492 16 6 5.2059 0.8814 2.1422 17 1 5.0995 1.7840 2.7441 18 6 4.8558 -0.3421 2.9915 19 6 5.6748 -0.3174 4.2837 20 6 5.1806 -1.4205 5.2218 21 6 7.1511 -0.5499 3.9562 22 7 6.5884 0.7691 1.6708 23 6 7.4971 1.8741 1.9497 24 6 8.9517 1.4117 1.8295 25 6 9.1278 0.7025 0.4814 26 6 8.3274 -0.6019 0.5127 27 6 6.9352 -0.3353 1.0088 28 8 6.0807 -1.1693 0.7962 29 1 -0.5400 0.9354 -0.0004 30 1 -0.5401 -0.9353 -0.0004 31 1 1.8500 -0.9354 -0.0004 32 1 1.3585 2.1316 0.0895 33 1 2.6213 1.4025 -0.9314 34 1 1.4920 1.4673 2.5894 35 1 3.1481 1.3110 3.2230 36 1 1.5274 3.6715 5.5392 37 1 3.7933 -0.3238 3.2343 38 1 5.0853 -1.2497 2.4332 39 1 5.5584 0.6516 4.7691 40 1 5.2969 -2.3894 4.7364 41 1 5.7638 -1.4025 6.1425 42 1 4.1288 -1.2548 5.4551 43 1 7.7096 -0.6965 4.8807 44 1 7.2490 -1.4355 3.3283 45 1 7.5466 0.3167 3.4263 46 1 7.3120 2.6806 1.2403 47 1 7.3196 2.2401 2.9609 48 1 9.1880 0.7216 2.6394 49 1 9.6163 2.2744 1.8785 50 1 10.1826 0.4820 0.3178 51 1 8.7573 1.3412 -0.3204 52 1 8.8188 -1.3123 1.1776 53 1 8.2796 -1.0202 -0.4927 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 ZINC000293664815.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 19:43:20 Heat of formation + Delta-G solvation = -47.841796 kcal Electronic energy + Delta-G solvation = -32604.714118 eV Core-core repulsion = 28670.133335 eV Total energy + Delta-G solvation = -3934.580783 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 0.84 seconds Orbital eigenvalues (eV) -40.96922 -38.62894 -36.32591 -36.01823 -35.34589 -33.51223 -33.21357 -32.12493 -29.88795 -29.04953 -27.45604 -26.85144 -25.62856 -24.40234 -23.75497 -22.80990 -21.95492 -19.83696 -19.71552 -18.88386 -17.79903 -16.87272 -16.68472 -16.12957 -15.73560 -15.32039 -15.21732 -14.75475 -14.53114 -14.41743 -14.27691 -13.87672 -13.62476 -13.40502 -13.21172 -13.01318 -12.93830 -12.59321 -12.51145 -12.16509 -11.98211 -11.68458 -11.63878 -11.37727 -11.31807 -11.21816 -11.06026 -11.00558 -10.94956 -10.87948 -10.79493 -10.72930 -10.50544 -10.41654 -10.25608 -10.18026 -9.70214 -9.20388 -8.94966 -8.86528 -8.57536 -8.04041 -7.64410 -6.19382 -4.27217 2.64678 3.08150 3.19718 3.27327 3.28112 3.30735 3.55196 4.15566 4.33939 4.68723 4.72888 4.75773 4.87710 5.11923 5.14636 5.24021 5.27810 5.39417 5.40869 5.45591 5.55766 5.59568 5.65318 5.68383 5.75758 5.77148 5.84561 5.87465 5.90097 5.95365 6.03263 6.05101 6.12170 6.15505 6.18270 6.28199 6.32580 6.39968 6.43963 6.53852 6.58070 6.67148 6.83251 6.97089 7.02501 7.14782 7.24240 7.61330 7.75911 7.91202 8.05824 8.41740 8.67535 8.79856 9.13827 9.41006 10.86675 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.009373 B = 0.005078 C = 0.004406 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2986.610921 B = 5512.420721 C = 6352.799744 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.194 4.194 2 C -0.152 4.152 3 C 0.145 3.855 4 N -0.594 5.594 5 C 0.231 3.769 6 C -0.539 4.539 7 H 0.060 0.940 8 C 0.067 3.933 9 N -0.888 5.888 10 Si 0.894 3.106 11 H -0.279 1.279 12 H -0.285 1.285 13 H -0.273 1.273 14 C 0.513 3.487 15 O -0.552 6.552 16 C 0.135 3.865 17 H 0.119 0.881 18 C -0.132 4.132 19 C -0.089 4.089 20 C -0.143 4.143 21 C -0.160 4.160 22 N -0.584 5.584 23 C 0.110 3.890 24 C -0.137 4.137 25 C -0.122 4.122 26 C -0.133 4.133 27 C 0.526 3.474 28 O -0.532 6.532 29 H 0.096 0.904 30 H 0.092 0.908 31 H 0.103 0.897 32 H 0.080 0.920 33 H 0.080 0.920 34 H 0.034 0.966 35 H 0.047 0.953 36 H 0.265 0.735 37 H 0.080 0.920 38 H 0.097 0.903 39 H 0.071 0.929 40 H 0.049 0.951 41 H 0.049 0.951 42 H 0.057 0.943 43 H 0.043 0.957 44 H 0.047 0.953 45 H 0.073 0.927 46 H 0.065 0.935 47 H 0.079 0.921 48 H 0.075 0.925 49 H 0.082 0.918 50 H 0.071 0.929 51 H 0.071 0.929 52 H 0.092 0.908 53 H 0.094 0.906 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 11.740 -4.924 -1.881 12.869 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 -0.232 4.232 2 C -0.172 4.172 3 C 0.021 3.979 4 N -0.325 5.325 5 C 0.112 3.888 6 C -0.578 4.578 7 H 0.078 0.922 8 C -0.136 4.136 9 N -0.526 5.526 10 Si 0.721 3.279 11 H -0.205 1.205 12 H -0.210 1.210 13 H -0.198 1.198 14 C 0.300 3.700 15 O -0.431 6.431 16 C 0.029 3.971 17 H 0.136 0.864 18 C -0.170 4.170 19 C -0.108 4.108 20 C -0.200 4.200 21 C -0.217 4.217 22 N -0.317 5.317 23 C -0.013 4.013 24 C -0.174 4.174 25 C -0.160 4.160 26 C -0.173 4.173 27 C 0.314 3.686 28 O -0.409 6.409 29 H 0.115 0.885 30 H 0.110 0.890 31 H 0.121 0.879 32 H 0.098 0.902 33 H 0.098 0.902 34 H 0.052 0.948 35 H 0.064 0.936 36 H 0.075 0.925 37 H 0.098 0.902 38 H 0.115 0.885 39 H 0.089 0.911 40 H 0.068 0.932 41 H 0.068 0.932 42 H 0.076 0.924 43 H 0.062 0.938 44 H 0.066 0.934 45 H 0.091 0.909 46 H 0.083 0.917 47 H 0.097 0.903 48 H 0.094 0.906 49 H 0.100 0.900 50 H 0.090 0.910 51 H 0.089 0.911 52 H 0.110 0.890 53 H 0.113 0.887 Dipole moment (debyes) X Y Z Total from point charges 11.464 -5.481 -2.380 12.928 hybrid contribution -0.177 1.247 0.310 1.297 sum 11.287 -4.234 -2.070 12.231 Atomic orbital electron populations 1.23739 0.95767 1.01423 1.02288 1.23398 0.96051 0.99383 0.98331 1.20358 0.92196 0.94550 0.90757 1.48113 1.08377 1.63822 1.12172 1.19564 0.96478 0.94878 0.77927 1.21511 1.44262 0.91960 1.00078 0.92210 1.24921 0.94780 0.98463 0.95484 1.69927 1.42637 1.35697 1.04348 0.86566 0.78652 0.85353 0.77325 1.20529 1.21045 1.19826 1.20584 0.82871 0.76449 0.90123 1.90585 1.76169 1.50188 1.26117 1.21030 0.80628 1.01638 0.93852 0.86374 1.22148 1.00886 0.98998 0.94970 1.21030 0.94848 0.99420 0.95501 1.21794 1.01293 0.98393 0.98544 1.22333 0.96311 1.02375 1.00688 1.47053 1.10203 1.18354 1.56138 1.21456 0.88819 0.89136 1.01851 1.21992 0.95677 1.01492 0.98254 1.21641 1.00205 0.96294 0.97879 1.21650 0.93130 0.99034 1.03464 1.19716 0.90267 0.81426 0.77165 1.90624 1.50129 1.44921 1.55209 0.88521 0.89004 0.87890 0.90193 0.90155 0.94783 0.93560 0.92536 0.90166 0.88469 0.91064 0.93188 0.93189 0.92411 0.93810 0.93370 0.90869 0.91692 0.90279 0.90620 0.89956 0.90999 0.91073 0.89011 0.88731 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 -0.19 -3.06 14.32 29.01 0.42 -2.65 16 2 C -0.15 -2.75 9.84 -36.03 -0.35 -3.11 16 3 C 0.14 2.88 5.95 -5.20 -0.03 2.85 16 4 N -0.59 -12.95 2.44 -176.43 -0.43 -13.38 16 5 C 0.23 5.46 4.58 -5.19 -0.02 5.44 16 6 C -0.54 -13.75 9.36 -34.44 -0.32 -14.07 16 7 H 0.06 1.56 7.81 -52.49 -0.41 1.15 16 8 C 0.07 1.72 5.46 -17.82 -0.10 1.62 16 9 N -0.89 -23.81 13.29 55.43 0.74 -23.08 16 10 Si 0.89 20.05 29.54 -169.99 -5.02 15.03 16 11 H -0.28 -6.29 7.11 56.52 0.40 -5.89 16 12 H -0.28 -6.34 7.11 56.52 0.40 -5.93 16 13 H -0.27 -6.08 7.11 56.52 0.40 -5.68 16 14 C 0.51 11.22 6.51 -10.99 -0.07 11.15 16 15 O -0.55 -13.27 13.78 -16.39 -0.23 -13.50 16 16 C 0.14 2.54 1.52 -69.08 -0.11 2.43 16 17 H 0.12 2.31 6.86 -51.93 -0.36 1.96 16 18 C -0.13 -2.37 3.67 -26.73 -0.10 -2.47 16 19 C -0.09 -1.36 2.89 -90.61 -0.26 -1.62 16 20 C -0.14 -1.99 9.17 37.16 0.34 -1.65 16 21 C -0.16 -2.10 7.69 37.16 0.29 -1.82 16 22 N -0.58 -9.34 1.22 -168.58 -0.21 -9.54 16 23 C 0.11 1.38 5.08 -4.39 -0.02 1.35 16 24 C -0.14 -1.25 5.75 -26.50 -0.15 -1.40 16 25 C -0.12 -1.18 6.03 -26.52 -0.16 -1.34 16 26 C -0.13 -1.62 6.03 -28.10 -0.17 -1.79 16 27 C 0.53 8.79 4.27 -11.87 -0.05 8.74 16 28 O -0.53 -11.09 12.48 -16.39 -0.20 -11.29 16 29 H 0.10 1.47 7.84 -52.48 -0.41 1.06 16 30 H 0.09 1.27 8.06 -52.49 -0.42 0.85 16 31 H 0.10 1.93 8.06 -52.48 -0.42 1.51 16 32 H 0.08 1.56 7.76 -51.93 -0.40 1.16 16 33 H 0.08 1.63 7.23 -51.93 -0.38 1.25 16 34 H 0.03 0.87 8.10 -51.93 -0.42 0.45 16 35 H 0.05 1.10 4.56 -51.93 -0.24 0.87 16 36 H 0.26 6.78 8.31 -40.82 -0.34 6.45 16 37 H 0.08 1.56 6.19 -51.93 -0.32 1.24 16 38 H 0.10 1.91 5.34 -51.93 -0.28 1.63 16 39 H 0.07 1.13 8.09 -51.93 -0.42 0.71 16 40 H 0.05 0.68 8.14 -51.93 -0.42 0.25 16 41 H 0.05 0.62 8.14 -51.93 -0.42 0.19 16 42 H 0.06 0.84 8.14 -51.93 -0.42 0.42 16 43 H 0.04 0.51 8.12 -51.93 -0.42 0.09 16 44 H 0.05 0.68 7.27 -51.93 -0.38 0.30 16 45 H 0.07 0.91 2.26 -51.93 -0.12 0.79 16 46 H 0.06 0.84 8.14 -51.93 -0.42 0.42 16 47 H 0.08 0.92 7.58 -51.93 -0.39 0.53 16 48 H 0.08 0.66 6.83 -51.93 -0.35 0.30 16 49 H 0.08 0.59 8.14 -51.93 -0.42 0.17 16 50 H 0.07 0.53 8.14 -51.93 -0.42 0.11 16 51 H 0.07 0.76 8.12 -51.93 -0.42 0.33 16 52 H 0.09 0.95 8.14 -51.93 -0.42 0.53 16 53 H 0.09 1.16 8.14 -51.93 -0.42 0.74 16 LS Contribution 401.73 15.07 6.05 6.05 Total: -1.00 -30.82 401.73 -9.26 -40.08 By element: Atomic # 1 Polarization: 17.03 SS G_CDS: -9.08 Total: 7.94 kcal Atomic # 6 Polarization: 2.56 SS G_CDS: -0.88 Total: 1.68 kcal Atomic # 7 Polarization: -46.10 SS G_CDS: 0.10 Total: -46.00 kcal Atomic # 8 Polarization: -24.36 SS G_CDS: -0.43 Total: -24.79 kcal Atomic # 14 Polarization: 20.05 SS G_CDS: -5.02 Total: 15.03 kcal Total LS contribution 6.05 Total: 6.05 kcal Total: -30.82 -9.26 -40.08 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. ZINC000293664815.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 -7.760 kcal (2) G-P(sol) polarization free energy of solvation -30.823 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -38.583 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.259 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.082 kcal (6) G-S(sol) free energy of system = (1) + (5) -47.842 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.84 seconds