Wall clock time and date at job start Sat Apr 11 2020 06:10:19 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 1.53002 * 1 3 3 C 1.53003 * 109.46379 * 2 1 4 4 O 1.42908 * 109.46665 * 180.02562 * 3 2 1 5 5 C 1.42892 * 113.99947 * 179.97438 * 4 3 2 6 6 C 1.50704 * 109.47099 * 179.97438 * 5 4 3 7 7 O 1.21278 * 120.00096 * 0.02562 * 6 5 4 8 8 N 1.34774 * 119.99845 * 180.02562 * 6 5 4 9 9 C 1.46503 * 119.99869 * 180.02562 * 8 6 5 10 10 H 1.08994 * 109.49619 * 324.92599 * 9 8 6 11 11 C 1.53192 * 109.50145 * 84.99764 * 9 8 6 12 12 N 1.46927 * 108.78812 * 174.67937 * 11 9 8 13 13 C 1.36934 * 120.63345 * 126.33603 * 12 11 9 14 14 H 1.08009 * 119.99652 * 332.49305 * 13 12 11 15 15 C 1.38811 * 120.00383 * 152.22438 * 13 12 11 16 16 N 1.31621 * 119.99840 * 343.17657 * 15 13 12 17 17 Si 1.86798 * 120.00023 * 163.17415 * 15 13 12 18 18 H 1.48505 * 109.46954 * 90.00175 * 17 15 13 19 19 H 1.48507 * 109.46887 * 209.99704 * 17 15 13 20 20 H 1.48493 * 109.47398 * 330.00294 * 17 15 13 21 21 C 1.46941 * 118.73168 * 306.60064 * 12 11 9 22 22 C 1.52655 * 109.02377 * 53.16708 * 21 12 11 23 23 C 1.53086 * 109.36594 * 65.88624 * 22 21 12 24 24 C 1.53121 * 109.15448 * 176.77461 * 23 22 21 25 25 O 1.42900 * 109.40312 * 302.51619 * 24 23 22 26 26 C 1.42907 * 114.13955 * 61.17640 * 25 24 23 27 27 C 1.53082 * 109.58513 * 185.56233 * 22 21 12 28 28 C 1.52944 * 109.56884 * 305.78772 * 22 21 12 29 29 H 1.08999 * 109.47182 * 60.00464 * 1 2 3 30 30 H 1.08999 * 109.46758 * 179.97438 * 1 2 3 31 31 H 1.08998 * 109.47396 * 299.99689 * 1 2 3 32 32 H 1.08996 * 109.46881 * 240.00306 * 2 1 3 33 33 H 1.08999 * 109.47182 * 119.99536 * 2 1 3 34 34 H 1.08996 * 109.47364 * 60.00602 * 3 2 1 35 35 H 1.08999 * 109.47084 * 299.99596 * 3 2 1 36 36 H 1.09007 * 109.47302 * 60.00309 * 5 4 3 37 37 H 1.08998 * 109.47255 * 300.00146 * 5 4 3 38 38 H 0.97006 * 120.00243 * 359.97438 * 8 6 5 39 39 H 1.09008 * 109.58178 * 54.88902 * 11 9 8 40 40 H 1.09000 * 109.58285 * 294.46957 * 11 9 8 41 41 H 0.96994 * 120.00240 * 180.02562 * 16 15 13 42 42 H 1.08997 * 109.58655 * 173.00522 * 21 12 11 43 43 H 1.08997 * 109.58956 * 293.42365 * 21 12 11 44 44 H 1.08994 * 109.52529 * 296.67697 * 23 22 21 45 45 H 1.08992 * 109.52473 * 56.87343 * 23 22 21 46 46 H 1.08991 * 109.48261 * 182.53479 * 24 23 22 47 47 H 1.08998 * 109.49134 * 62.50235 * 24 23 22 48 48 H 1.08999 * 109.48259 * 178.83635 * 26 25 24 49 49 H 1.09005 * 109.48169 * 58.78898 * 26 25 24 50 50 H 1.09002 * 109.52131 * 303.24460 * 27 22 21 51 51 H 1.08998 * 109.52460 * 63.37769 * 27 22 21 52 52 H 1.09000 * 109.45540 * 301.02772 * 28 22 21 53 53 H 1.08994 * 109.46164 * 181.08002 * 28 22 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 6 1.5300 0.0000 0.0000 3 6 2.0398 1.4426 0.0000 4 8 3.4689 1.4427 -0.0006 5 6 4.0500 2.7481 -0.0012 6 6 5.5524 2.6292 -0.0012 7 8 6.0740 1.5343 -0.0012 8 7 6.3162 3.7396 -0.0012 9 6 7.7767 3.6240 -0.0018 10 1 8.0732 2.7569 0.5884 11 6 8.2761 3.4584 -1.4405 12 7 9.7453 3.4724 -1.4360 13 6 10.4545 2.4546 -2.0157 14 1 10.0254 1.4655 -2.0796 15 6 11.7227 2.6953 -2.5263 16 7 12.1148 3.9299 -2.7596 17 14 12.8728 1.2670 -2.8822 18 1 12.6695 0.8038 -4.2784 19 1 14.2797 1.7089 -2.7072 20 1 12.5835 0.1528 -1.9441 21 6 10.4389 4.5966 -0.7924 22 6 9.9136 4.7557 0.6320 23 6 10.3060 3.5279 1.4579 24 6 9.8473 3.7282 2.9050 25 8 10.4300 4.9242 3.4264 26 6 10.0579 6.1108 2.7222 27 6 10.5254 6.0066 1.2679 28 6 8.3902 4.8884 0.6044 29 1 -0.3633 0.5138 -0.8900 30 1 -0.3633 -1.0277 -0.0005 31 1 -0.3634 0.5138 0.8900 32 1 1.8933 -0.5138 -0.8900 33 1 1.8934 -0.5138 0.8900 34 1 1.6766 1.9564 0.8900 35 1 1.6765 1.9563 -0.8900 36 1 3.7288 3.2893 0.8888 37 1 3.7280 3.2887 -0.8912 38 1 5.8990 4.6153 -0.0016 39 1 7.9046 4.2801 -2.0530 40 1 7.9210 2.5100 -1.8436 41 1 13.0008 4.0981 -3.1167 42 1 11.5102 4.3975 -0.7651 43 1 10.2496 5.5120 -1.3530 44 1 9.8264 2.6414 1.0431 45 1 11.3885 3.4028 1.4329 46 1 10.1637 2.8770 3.5077 47 1 8.7609 3.8104 2.9340 48 1 10.5258 6.9751 3.1935 49 1 8.9741 6.2243 2.7485 50 1 11.6127 5.9353 1.2390 51 1 10.2034 6.8901 0.7166 52 1 8.1120 5.7523 0.0007 53 1 8.0187 5.0211 1.6204 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 ZINC001099569896.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 06:10:19 Heat of formation + Delta-G solvation = -116.390868 kcal Electronic energy + Delta-G solvation = -31697.943869 eV Core-core repulsion = 27569.934524 eV Total energy + Delta-G solvation = -4128.009345 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.93 seconds Orbital eigenvalues (eV) -40.28268 -39.36829 -37.89868 -36.82709 -34.39680 -33.90178 -33.53085 -31.42606 -30.70294 -29.79214 -27.88204 -27.12974 -25.72819 -25.43714 -23.27884 -22.98049 -22.01681 -21.77491 -20.58708 -19.99902 -18.10858 -17.13448 -16.75812 -16.65267 -16.61795 -16.03833 -15.68672 -15.20777 -15.13627 -14.73291 -14.56290 -14.43814 -14.01535 -13.81717 -13.68276 -13.57989 -13.34752 -13.14936 -12.52459 -12.47908 -12.35223 -12.31735 -12.19258 -11.87645 -11.41262 -11.37445 -11.19050 -11.15135 -11.01893 -10.89476 -10.79025 -10.74579 -10.42462 -10.21253 -10.01960 -9.91951 -9.88427 -9.77927 -9.62750 -9.40380 -8.92468 -8.86267 -8.40642 -6.67852 -5.79601 -3.21512 2.78742 2.85199 3.39679 3.46741 3.50926 3.87958 4.17682 4.50972 4.66479 4.68707 4.83584 4.94855 4.99074 5.03625 5.03642 5.17163 5.17937 5.19361 5.26419 5.36887 5.42018 5.42678 5.46643 5.51047 5.57807 5.68908 5.70118 5.76829 5.83720 5.84519 5.92580 5.93903 6.00753 6.15188 6.16466 6.22015 6.37322 6.51012 6.59934 6.66229 6.74656 6.82752 6.88250 6.93939 6.99792 7.28851 7.49905 7.61511 7.70369 7.83064 8.40805 8.46855 9.20970 9.82945 10.38152 11.29172 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.009851 B = 0.003244 C = 0.002644 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2841.780166 B = 8629.704925 C =10587.109698 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.149 4.149 2 C -0.125 4.125 3 C 0.060 3.940 4 O -0.363 6.363 5 C 0.046 3.954 6 C 0.509 3.491 7 O -0.514 6.514 8 N -0.723 5.723 9 C 0.125 3.875 10 H 0.091 0.909 11 C 0.141 3.859 12 N -0.584 5.584 13 C -0.249 4.249 14 H 0.066 0.934 15 C 0.005 3.995 16 N -0.903 5.903 17 Si 0.900 3.100 18 H -0.287 1.287 19 H -0.290 1.290 20 H -0.278 1.278 21 C 0.183 3.817 22 C -0.078 4.078 23 C -0.135 4.135 24 C 0.059 3.941 25 O -0.388 6.388 26 C 0.062 3.938 27 C -0.140 4.140 28 C -0.109 4.109 29 H 0.055 0.945 30 H 0.061 0.939 31 H 0.055 0.945 32 H 0.073 0.927 33 H 0.072 0.928 34 H 0.049 0.951 35 H 0.049 0.951 36 H 0.075 0.925 37 H 0.078 0.922 38 H 0.394 0.606 39 H 0.017 0.983 40 H 0.058 0.942 41 H 0.253 0.747 42 H 0.092 0.908 43 H 0.019 0.981 44 H 0.084 0.916 45 H 0.068 0.932 46 H 0.085 0.915 47 H 0.044 0.956 48 H 0.085 0.915 49 H 0.045 0.955 50 H 0.073 0.927 51 H 0.068 0.932 52 H 0.061 0.939 53 H 0.054 0.946 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -17.748 4.093 9.218 20.413 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 -0.206 4.206 2 C -0.162 4.162 3 C -0.017 4.017 4 O -0.281 6.281 5 C -0.035 4.035 6 C 0.293 3.707 7 O -0.388 6.388 8 N -0.376 5.376 9 C 0.021 3.979 10 H 0.109 0.891 11 C 0.013 3.987 12 N -0.305 5.305 13 C -0.379 4.379 14 H 0.084 0.916 15 C -0.194 4.194 16 N -0.548 5.548 17 Si 0.730 3.270 18 H -0.214 1.214 19 H -0.216 1.216 20 H -0.203 1.203 21 C 0.057 3.943 22 C -0.080 4.080 23 C -0.172 4.172 24 C -0.017 4.017 25 O -0.307 6.307 26 C -0.015 4.015 27 C -0.178 4.178 28 C -0.147 4.147 29 H 0.074 0.926 30 H 0.080 0.920 31 H 0.074 0.926 32 H 0.091 0.909 33 H 0.090 0.910 34 H 0.067 0.933 35 H 0.068 0.932 36 H 0.093 0.907 37 H 0.095 0.905 38 H 0.227 0.773 39 H 0.035 0.965 40 H 0.077 0.923 41 H 0.063 0.937 42 H 0.110 0.890 43 H 0.037 0.963 44 H 0.103 0.897 45 H 0.087 0.913 46 H 0.103 0.897 47 H 0.062 0.938 48 H 0.103 0.897 49 H 0.063 0.937 50 H 0.091 0.909 51 H 0.087 0.913 52 H 0.080 0.920 53 H 0.073 0.927 Dipole moment (debyes) X Y Z Total from point charges -16.961 3.126 9.278 19.584 hybrid contribution 0.017 0.166 -0.589 0.612 sum -16.944 3.292 8.689 19.324 Atomic orbital electron populations 1.21695 0.94769 1.02268 1.01895 1.21453 0.95481 0.95507 1.03784 1.22620 0.80785 0.98218 1.00076 1.88032 1.19292 1.25367 1.95385 1.22211 0.92270 0.86775 1.02216 1.20152 0.88275 0.85001 0.77245 1.90764 1.74392 1.26361 1.47261 1.46024 1.07731 1.08030 1.75795 1.21819 0.76524 0.99077 1.00529 0.89141 1.21205 0.86244 0.99387 0.91837 1.43925 0.98559 1.24321 1.63728 1.19177 0.98166 0.88760 1.31788 0.91591 1.24997 0.99706 0.96131 0.98543 1.70022 1.19455 1.18116 1.47161 0.86328 0.80293 0.82172 0.78235 1.21413 1.21569 1.20341 1.20757 0.98640 0.89451 0.85447 1.21107 0.93182 0.93891 0.99855 1.22131 1.02319 0.99276 0.93484 1.22674 0.96624 0.86951 0.95499 1.87860 1.72211 1.15068 1.55605 1.22563 0.98649 0.87647 0.92598 1.22128 1.01837 0.98422 0.95416 1.21810 0.96371 0.96989 0.99546 0.92551 0.91987 0.92599 0.90869 0.90958 0.93325 0.93239 0.90660 0.90451 0.77303 0.96511 0.92335 0.93666 0.89029 0.96322 0.89741 0.91279 0.89653 0.93777 0.89720 0.93685 0.90872 0.91306 0.92043 0.92720 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 16. 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 -0.92 9.91 37.16 0.37 -0.55 16 2 C -0.12 -1.07 6.30 -26.73 -0.17 -1.24 16 3 C 0.06 0.55 5.94 37.16 0.22 0.77 16 4 O -0.36 -4.84 9.88 -55.14 -0.54 -5.38 16 5 C 0.05 0.50 6.42 36.01 0.23 0.73 16 6 C 0.51 7.77 7.87 -10.98 -0.09 7.68 16 7 O -0.51 -10.61 16.16 -14.35 -0.23 -10.85 16 8 N -0.72 -9.80 5.08 -53.68 -0.27 -10.07 16 9 C 0.13 2.14 2.27 -67.80 -0.15 1.99 16 10 H 0.09 1.79 5.72 -51.93 -0.30 1.49 16 11 C 0.14 2.98 6.09 -3.71 -0.02 2.96 16 12 N -0.58 -14.18 2.52 -172.63 -0.43 -14.61 16 13 C -0.25 -6.83 9.58 -15.06 -0.14 -6.97 16 14 H 0.07 1.84 7.88 -52.48 -0.41 1.43 16 15 C 0.00 0.13 4.92 -17.43 -0.09 0.04 16 16 N -0.90 -25.76 11.18 55.49 0.62 -25.14 16 17 Si 0.90 21.95 29.59 -169.99 -5.03 16.92 16 18 H -0.29 -7.03 7.11 56.52 0.40 -6.63 16 19 H -0.29 -7.07 7.11 56.52 0.40 -6.67 16 20 H -0.28 -6.73 7.11 56.52 0.40 -6.33 16 21 C 0.18 4.10 3.94 -3.98 -0.02 4.09 16 22 C -0.08 -1.36 0.51 -154.63 -0.08 -1.44 16 23 C -0.13 -2.42 4.47 -26.62 -0.12 -2.54 16 24 C 0.06 0.91 6.57 37.22 0.24 1.15 16 25 O -0.39 -6.14 10.76 -35.23 -0.38 -6.51 16 26 C 0.06 0.84 6.57 37.22 0.24 1.08 16 27 C -0.14 -2.12 4.92 -26.63 -0.13 -2.25 16 28 C -0.11 -1.65 3.63 -26.73 -0.10 -1.75 16 29 H 0.06 0.32 8.14 -51.93 -0.42 -0.11 16 30 H 0.06 0.35 8.14 -51.93 -0.42 -0.07 16 31 H 0.05 0.31 8.14 -51.93 -0.42 -0.12 16 32 H 0.07 0.69 8.14 -51.93 -0.42 0.26 16 33 H 0.07 0.66 8.14 -51.93 -0.42 0.24 16 34 H 0.05 0.37 8.14 -51.93 -0.42 -0.06 16 35 H 0.05 0.38 8.14 -51.93 -0.42 -0.04 16 36 H 0.08 0.60 8.14 -51.93 -0.42 0.18 16 37 H 0.08 0.66 8.14 -51.93 -0.42 0.24 16 38 H 0.39 3.85 8.60 -40.82 -0.35 3.50 16 39 H 0.02 0.36 8.14 -51.92 -0.42 -0.07 16 40 H 0.06 1.36 7.93 -51.93 -0.41 0.94 16 41 H 0.25 7.03 8.31 -40.82 -0.34 6.69 16 42 H 0.09 2.36 6.05 -51.93 -0.31 2.04 16 43 H 0.02 0.44 8.14 -51.93 -0.42 0.02 16 44 H 0.08 1.70 5.93 -51.93 -0.31 1.39 16 45 H 0.07 1.35 8.14 -51.93 -0.42 0.93 16 46 H 0.09 1.22 8.14 -51.93 -0.42 0.80 16 47 H 0.04 0.64 6.64 -51.93 -0.34 0.30 16 48 H 0.08 0.98 8.14 -51.93 -0.42 0.56 16 49 H 0.04 0.55 6.58 -51.93 -0.34 0.21 16 50 H 0.07 1.20 8.14 -51.93 -0.42 0.77 16 51 H 0.07 0.96 8.14 -51.93 -0.42 0.54 16 52 H 0.06 0.88 8.14 -51.93 -0.42 0.46 16 53 H 0.05 0.74 5.03 -51.93 -0.26 0.48 16 LS Contribution 403.51 15.07 6.08 6.08 Total: -1.00 -33.09 403.51 -9.35 -42.44 By element: Atomic # 1 Polarization: 12.75 SS G_CDS: -9.37 Total: 3.39 kcal Atomic # 6 Polarization: 3.53 SS G_CDS: 0.21 Total: 3.74 kcal Atomic # 7 Polarization: -49.73 SS G_CDS: -0.09 Total: -49.82 kcal Atomic # 8 Polarization: -21.59 SS G_CDS: -1.16 Total: -22.74 kcal Atomic # 14 Polarization: 21.95 SS G_CDS: -5.03 Total: 16.92 kcal Total LS contribution 6.08 Total: 6.08 kcal Total: -33.09 -9.35 -42.44 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. ZINC001099569896.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 -73.953 kcal (2) G-P(sol) polarization free energy of solvation -33.087 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -107.040 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.351 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.438 kcal (6) G-S(sol) free energy of system = (1) + (5) -116.391 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.93 seconds