Wall clock time and date at job start Sat Apr 11 2020 04:52:46 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 O 1.42897 * 1 3 3 C 1.42901 * 113.99835 * 2 1 4 4 C 1.52998 * 109.47053 * 179.97438 * 3 2 1 5 5 N 1.46499 * 109.46968 * 185.00905 * 4 3 2 6 6 C 1.36734 * 127.13714 * 95.36336 * 5 4 3 7 7 C 1.50699 * 126.34970 * 359.97438 * 6 5 4 8 8 C 1.53008 * 109.47311 * 269.71988 * 7 6 5 9 9 C 1.52993 * 109.47208 * 179.97438 * 8 7 6 10 10 C 1.50700 * 109.46935 * 179.97438 * 9 8 7 11 11 H 1.08002 * 120.00065 * 0.02562 * 10 9 8 12 12 C 1.37874 * 120.00065 * 179.72490 * 10 9 8 13 13 N 1.31519 * 120.00469 * 180.27566 * 12 10 9 14 14 Si 1.86806 * 119.99898 * 0.28173 * 12 10 9 15 15 H 1.48497 * 109.47390 * 89.99830 * 14 12 10 16 16 H 1.48500 * 109.47153 * 209.99806 * 14 12 10 17 17 H 1.48501 * 109.47023 * 329.99433 * 14 12 10 18 18 N 1.30299 * 107.30581 * 179.73326 * 6 5 4 19 19 N 1.28524 * 110.05202 * 0.25551 * 18 6 5 20 20 C 1.31218 * 109.86302 * 0.02562 * 19 18 6 21 21 N 1.38578 * 126.47635 * 180.02562 * 20 19 18 22 22 C 1.47902 * 111.00168 * 113.18829 * 21 20 19 23 23 C 1.53995 * 107.05663 * 214.15595 * 22 21 20 24 24 C 1.54596 * 105.14257 * 1.22785 * 23 22 21 25 25 H 1.09006 * 110.72247 * 263.60232 * 24 23 22 26 26 C 1.52993 * 110.72819 * 140.49482 * 24 23 22 27 27 C 1.48533 * 111.00000 * 355.79295 * 21 20 19 28 28 H 1.08997 * 110.67007 * 41.28399 * 27 21 20 29 29 C 1.53003 * 110.66590 * 278.15965 * 27 21 20 30 30 H 1.09003 * 109.47355 * 300.00042 * 1 2 3 31 31 H 1.09002 * 109.47097 * 60.00393 * 1 2 3 32 32 H 1.09002 * 109.47297 * 179.97438 * 1 2 3 33 33 H 1.09002 * 109.47013 * 59.99971 * 3 2 1 34 34 H 1.08999 * 109.47361 * 299.99708 * 3 2 1 35 35 H 1.09003 * 109.47117 * 65.00664 * 4 3 2 36 36 H 1.09005 * 109.47347 * 305.00947 * 4 3 2 37 37 H 1.08994 * 109.47412 * 149.72060 * 7 6 5 38 38 H 1.08998 * 109.47152 * 29.71397 * 7 6 5 39 39 H 1.09008 * 109.46829 * 59.99543 * 8 7 6 40 40 H 1.08996 * 109.46831 * 300.00502 * 8 7 6 41 41 H 1.09002 * 109.46910 * 60.00652 * 9 8 7 42 42 H 1.08998 * 109.47208 * 299.99968 * 9 8 7 43 43 H 0.96994 * 120.00438 * 180.02562 * 13 12 10 44 44 H 1.09000 * 109.91848 * 333.50719 * 22 21 20 45 45 H 1.09001 * 109.91799 * 94.60546 * 22 21 20 46 46 H 1.09000 * 110.31118 * 120.14162 * 23 22 21 47 47 H 1.09002 * 110.31166 * 242.20824 * 23 22 21 48 48 H 1.09004 * 109.47455 * 61.44830 * 26 24 23 49 49 H 1.09004 * 109.47194 * 181.45088 * 26 24 23 50 50 H 1.09005 * 109.47047 * 301.45434 * 26 24 23 51 51 H 1.08996 * 109.47519 * 61.45079 * 29 27 21 52 52 H 1.09003 * 109.47347 * 181.45392 * 29 27 21 53 53 H 1.09003 * 109.46924 * 301.44895 * 29 27 21 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 8 1.4290 0.0000 0.0000 3 6 2.0102 1.3055 0.0000 4 6 3.5354 1.1847 0.0006 5 7 4.1307 2.5178 0.1212 6 6 4.5513 3.1334 1.2674 7 6 4.4897 2.5642 2.6614 8 6 3.1587 2.9485 3.3109 9 6 3.0958 2.3700 4.7258 10 6 1.7851 2.7491 5.3657 11 1 1.0684 3.3429 4.8177 12 6 1.4982 2.3327 6.6484 13 7 0.3521 2.6589 7.2049 14 14 2.7376 1.3052 7.5960 15 1 3.6456 2.2013 8.3560 16 1 2.0205 0.4109 8.5400 17 1 3.5318 0.4865 6.6452 18 7 5.0202 4.3015 0.9304 19 7 4.9202 4.4666 -0.3403 20 6 4.3772 3.4042 -0.8865 21 7 4.1112 3.2151 -2.2333 22 6 4.9592 2.1416 -2.7955 23 6 5.2781 2.5331 -4.2503 24 6 4.5880 3.9003 -4.4612 25 1 3.6133 3.7718 -4.9321 26 6 5.4716 4.8300 -5.2951 27 6 4.4320 4.4361 -3.0159 28 1 5.3638 4.8821 -2.6683 29 6 3.2854 5.4460 -2.9351 30 1 -0.3634 0.5138 0.8900 31 1 -0.3633 0.5138 -0.8900 32 1 -0.3634 -1.0277 -0.0005 33 1 1.6885 1.8464 0.8900 34 1 1.6886 1.8464 -0.8900 35 1 3.8637 0.7230 -0.9306 36 1 3.8507 0.5684 0.8426 37 1 5.3121 2.9645 3.2541 38 1 4.5707 1.4782 2.6143 39 1 2.3361 2.5481 2.7181 40 1 3.0776 4.0344 3.3579 41 1 3.9183 2.7701 5.3188 42 1 3.1767 1.2841 4.6783 43 1 0.1504 2.3663 8.1073 44 1 5.8826 2.0591 -2.2223 45 1 4.4219 1.1934 -2.7722 46 1 6.3550 2.6276 -4.3893 47 1 4.8720 1.7923 -4.9392 48 1 5.6381 4.3885 -6.2777 49 1 4.9777 5.7950 -5.4093 50 1 6.4288 4.9690 -4.7924 51 1 3.1382 5.7465 -1.8978 52 1 3.5297 6.3220 -3.5360 53 1 2.3713 4.9889 -3.3142 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 ZINC001523559197.mol2 53 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 04:52:46 Heat of formation + Delta-G solvation = 25.135533 kcal Electronic energy + Delta-G solvation = -30500.329812 eV Core-core repulsion = 26601.206314 eV Total energy + Delta-G solvation = -3899.123497 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.227 amu Computer time = 0.76 seconds Orbital eigenvalues (eV) -43.00498 -39.73041 -38.15055 -35.50857 -34.98392 -33.72730 -32.31468 -31.81463 -30.11963 -29.87800 -28.15669 -26.91790 -26.44215 -24.71913 -23.85068 -23.59030 -22.36731 -21.12507 -20.50820 -20.17404 -19.74524 -17.47327 -16.95689 -16.70303 -16.31967 -16.18284 -15.93874 -15.59755 -14.95691 -14.87590 -14.45961 -14.30325 -14.15916 -13.92708 -13.66693 -13.39019 -13.20753 -12.77437 -12.73582 -12.49067 -12.39788 -12.11916 -12.05218 -11.97992 -11.85391 -11.70982 -11.54211 -11.37264 -11.29299 -11.11007 -10.99400 -10.84849 -10.71373 -10.53297 -10.18261 -10.06158 -9.85791 -9.84928 -9.71711 -9.55774 -9.21921 -8.54713 -8.28949 -6.05063 -4.03492 1.74179 2.09298 2.92165 3.30666 3.37897 3.37931 3.40274 3.76592 4.06914 4.17180 4.37405 4.44243 4.48378 4.55239 4.71760 4.74667 4.93281 4.97350 5.01383 5.06367 5.12969 5.13820 5.21534 5.24891 5.28231 5.29204 5.32085 5.37075 5.39205 5.44941 5.53662 5.59037 5.61043 5.66660 5.70131 5.73733 5.76141 5.85704 5.93317 5.98581 6.01901 6.13224 6.36951 6.47956 6.50829 6.58957 6.82211 6.89103 7.13488 7.24971 7.37796 7.77082 8.52403 8.86638 8.99464 9.56961 11.08406 Molecular weight = 336.23amu Principal moments of inertia in cm(-1) A = 0.015328 B = 0.002832 C = 0.002609 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1826.317355 B = 9885.971714 C =10728.225763 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.034 3.966 2 O -0.388 6.388 3 C 0.048 3.952 4 C 0.115 3.885 5 N -0.475 5.475 6 C 0.203 3.797 7 C -0.039 4.039 8 C -0.095 4.095 9 C -0.012 4.012 10 C -0.520 4.520 11 H 0.070 0.930 12 C 0.066 3.934 13 N -0.904 5.904 14 Si 0.880 3.120 15 H -0.276 1.276 16 H -0.288 1.288 17 H -0.265 1.265 18 N -0.286 5.286 19 N -0.317 5.317 20 C 0.340 3.660 21 N -0.435 5.435 22 C 0.037 3.963 23 C -0.124 4.124 24 C -0.093 4.093 25 H 0.087 0.913 26 C -0.142 4.142 27 C 0.085 3.915 28 H 0.080 0.920 29 C -0.136 4.136 30 H 0.050 0.950 31 H 0.041 0.959 32 H 0.089 0.911 33 H 0.065 0.935 34 H 0.060 0.940 35 H 0.098 0.902 36 H 0.107 0.893 37 H 0.098 0.902 38 H 0.078 0.922 39 H 0.051 0.949 40 H 0.063 0.937 41 H 0.016 0.984 42 H 0.017 0.983 43 H 0.263 0.737 44 H 0.053 0.947 45 H 0.087 0.913 46 H 0.074 0.926 47 H 0.078 0.922 48 H 0.059 0.941 49 H 0.060 0.940 50 H 0.057 0.943 51 H 0.063 0.937 52 H 0.064 0.936 53 H 0.059 0.941 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 8.105 -3.656 -26.560 28.009 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 -0.063 4.063 2 O -0.306 6.306 3 C -0.030 4.030 4 C -0.009 4.009 5 N -0.171 5.171 6 C -0.065 4.065 7 C -0.079 4.079 8 C -0.133 4.133 9 C -0.049 4.049 10 C -0.558 4.558 11 H 0.089 0.911 12 C -0.135 4.135 13 N -0.543 5.543 14 Si 0.707 3.293 15 H -0.202 1.202 16 H -0.214 1.214 17 H -0.190 1.190 18 N -0.124 5.124 19 N -0.161 5.161 20 C -0.016 4.016 21 N -0.159 5.159 22 C -0.090 4.090 23 C -0.162 4.162 24 C -0.112 4.112 25 H 0.105 0.895 26 C -0.200 4.200 27 C -0.021 4.021 28 H 0.098 0.902 29 C -0.193 4.193 30 H 0.069 0.931 31 H 0.059 0.941 32 H 0.107 0.893 33 H 0.084 0.916 34 H 0.079 0.921 35 H 0.116 0.884 36 H 0.126 0.874 37 H 0.116 0.884 38 H 0.096 0.904 39 H 0.069 0.931 40 H 0.082 0.918 41 H 0.034 0.966 42 H 0.035 0.965 43 H 0.073 0.927 44 H 0.071 0.929 45 H 0.105 0.895 46 H 0.093 0.907 47 H 0.097 0.903 48 H 0.078 0.922 49 H 0.079 0.921 50 H 0.076 0.924 51 H 0.082 0.918 52 H 0.083 0.917 53 H 0.078 0.922 Dipole moment (debyes) X Y Z Total from point charges 8.181 -2.625 -26.322 27.689 hybrid contribution 0.299 -1.499 0.637 1.656 sum 8.480 -4.124 -25.685 27.361 Atomic orbital electron populations 1.22790 0.79862 1.03033 1.00607 1.87749 1.20664 1.26594 1.95625 1.22751 0.92229 0.85790 1.02223 1.21564 0.93099 0.80727 1.05479 1.46065 1.48480 1.15660 1.06872 1.25213 0.99629 0.91256 0.90359 1.20390 1.02402 0.99924 0.85165 1.21495 0.92491 1.01538 0.97801 1.19571 0.97844 0.95924 0.91607 1.21095 1.01388 1.33804 0.99513 0.91143 1.25031 0.95186 0.95765 0.97497 1.69914 1.22869 1.46471 1.15002 0.86778 0.81716 0.80776 0.80013 1.20210 1.21444 1.18957 1.74037 1.19677 1.13718 1.04957 1.74546 1.18838 1.20738 1.01936 1.22662 1.00755 0.88986 0.89214 1.61531 1.50143 1.08448 0.95804 1.22977 0.95546 0.94843 0.95618 1.22480 1.01188 0.97541 0.95021 1.22159 1.00056 0.94376 0.94659 0.89472 1.21769 0.99446 0.99281 0.99474 1.22821 0.99736 0.88707 0.90876 0.90170 1.21659 0.97207 0.97526 1.02930 0.93121 0.94061 0.89268 0.91648 0.92142 0.88411 0.87449 0.88361 0.90374 0.93062 0.91820 0.96617 0.96519 0.92734 0.92878 0.89514 0.90743 0.90340 0.92200 0.92066 0.92418 0.91796 0.91689 0.92201 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 C 0.03 0.35 11.01 101.05 1.11 1.46 16 2 O -0.39 -4.89 10.70 -35.23 -0.38 -5.27 16 3 C 0.05 0.60 6.26 37.16 0.23 0.83 16 4 C 0.11 1.32 6.35 -4.04 -0.03 1.30 16 5 N -0.47 -6.67 2.81 -114.08 -0.32 -6.99 16 6 C 0.20 3.31 7.32 -154.02 -1.13 2.19 16 7 C -0.04 -0.62 5.58 -27.88 -0.16 -0.78 16 8 C -0.09 -1.85 5.13 -26.73 -0.14 -1.98 16 9 C -0.01 -0.28 4.04 -27.89 -0.11 -0.39 16 10 C -0.52 -14.74 9.66 -34.44 -0.33 -15.07 16 11 H 0.07 2.16 7.99 -52.49 -0.42 1.74 16 12 C 0.07 1.93 5.47 -17.82 -0.10 1.83 16 13 N -0.90 -27.86 13.96 55.43 0.77 -27.09 16 14 Si 0.88 21.52 27.47 -169.99 -4.67 16.85 16 15 H -0.28 -6.67 7.11 56.52 0.40 -6.27 16 16 H -0.29 -7.01 7.11 56.52 0.40 -6.61 16 17 H -0.26 -6.13 6.54 56.52 0.37 -5.76 16 18 N -0.29 -5.27 12.18 32.99 0.40 -4.87 16 19 N -0.32 -5.42 10.71 30.32 0.32 -5.09 16 20 C 0.34 4.88 6.60 -318.87 -2.10 2.78 16 21 N -0.43 -4.90 5.02 -163.13 -0.82 -5.72 16 22 C 0.04 0.33 5.85 -2.75 -0.02 0.31 16 23 C -0.12 -0.82 6.51 -25.37 -0.17 -0.98 16 24 C -0.09 -0.66 3.09 -88.76 -0.27 -0.94 16 25 H 0.09 0.60 8.04 -51.93 -0.42 0.18 16 26 C -0.14 -0.83 9.16 37.15 0.34 -0.49 16 27 C 0.09 0.86 2.02 -65.79 -0.13 0.73 16 28 H 0.08 0.95 7.33 -51.93 -0.38 0.57 16 29 C -0.14 -1.38 9.46 37.16 0.35 -1.03 16 30 H 0.05 0.58 8.14 -51.93 -0.42 0.15 16 31 H 0.04 0.37 8.14 -51.93 -0.42 -0.05 16 32 H 0.09 0.78 8.14 -51.93 -0.42 0.35 16 33 H 0.07 0.95 6.87 -51.93 -0.36 0.59 16 34 H 0.06 0.74 8.14 -51.93 -0.42 0.31 16 35 H 0.10 0.93 6.11 -51.93 -0.32 0.62 16 36 H 0.11 1.18 7.10 -51.93 -0.37 0.82 16 37 H 0.10 1.52 8.14 -51.93 -0.42 1.09 16 38 H 0.08 1.08 7.17 -51.93 -0.37 0.71 16 39 H 0.05 1.00 6.87 -51.92 -0.36 0.64 16 40 H 0.06 1.33 8.14 -51.93 -0.42 0.91 16 41 H 0.02 0.36 7.58 -51.93 -0.39 -0.04 16 42 H 0.02 0.38 7.19 -51.93 -0.37 0.00 16 43 H 0.26 7.58 8.31 -40.82 -0.34 7.24 16 44 H 0.05 0.52 7.75 -51.93 -0.40 0.11 16 45 H 0.09 0.67 6.93 -51.93 -0.36 0.31 16 46 H 0.07 0.45 7.85 -51.93 -0.41 0.04 16 47 H 0.08 0.41 8.14 -51.93 -0.42 -0.01 16 48 H 0.06 0.29 8.14 -51.93 -0.42 -0.14 16 49 H 0.06 0.34 8.14 -51.93 -0.42 -0.08 16 50 H 0.06 0.36 8.13 -51.93 -0.42 -0.06 16 51 H 0.06 0.83 7.78 -51.93 -0.40 0.42 16 52 H 0.06 0.54 8.14 -51.93 -0.42 0.12 16 53 H 0.06 0.57 8.13 -51.93 -0.42 0.15 16 LS Contribution 415.67 15.07 6.26 6.26 Total: -1.00 -33.42 415.67 -10.63 -44.05 By element: Atomic # 1 Polarization: 7.66 SS G_CDS: -9.57 Total: -1.91 kcal Atomic # 6 Polarization: -7.59 SS G_CDS: -2.64 Total: -10.24 kcal Atomic # 7 Polarization: -50.12 SS G_CDS: 0.36 Total: -49.76 kcal Atomic # 8 Polarization: -4.89 SS G_CDS: -0.38 Total: -5.27 kcal Atomic # 14 Polarization: 21.52 SS G_CDS: -4.67 Total: 16.85 kcal Total LS contribution 6.26 Total: 6.26 kcal Total: -33.42 -10.63 -44.05 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. ZINC001523559197.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 69.187 kcal (2) G-P(sol) polarization free energy of solvation -33.418 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 35.769 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.634 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.052 kcal (6) G-S(sol) free energy of system = (1) + (5) 25.136 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.76 seconds