Wall clock time and date at job start Tue Mar 31 2020 20:58:46 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 C 1.53000 * 1 3 3 N 1.46507 * 109.47092 * 2 1 4 4 C 1.34776 * 120.00209 * 82.92427 * 3 2 1 5 5 O 1.21347 * 120.00007 * 184.11169 * 4 3 2 6 6 C 1.49457 * 119.99820 * 4.10969 * 4 3 2 7 7 O 1.21349 * 119.99806 * 355.24249 * 6 4 3 8 8 N 1.34777 * 119.99779 * 175.24079 * 6 4 3 9 9 C 1.46927 * 120.62969 * 7.11443 * 8 6 4 10 10 C 1.53194 * 108.77473 * 126.36763 * 9 8 6 11 11 C 1.53035 * 109.31121 * 54.63214 * 10 9 8 12 12 C 1.53042 * 109.54064 * 298.63339 * 11 10 9 13 13 H 1.09001 * 109.49508 * 301.41543 * 12 11 10 14 14 C 1.50703 * 109.50013 * 181.34834 * 12 11 10 15 15 H 1.08002 * 119.99741 * 0.02562 * 14 12 11 16 16 C 1.37874 * 120.00106 * 179.97438 * 14 12 11 17 17 N 1.31516 * 120.00112 * 359.97438 * 16 14 12 18 18 Si 1.86804 * 119.99943 * 180.02562 * 16 14 12 19 19 H 1.48497 * 109.46741 * 90.00201 * 18 16 14 20 20 H 1.48496 * 109.46806 * 209.99921 * 18 16 14 21 21 H 1.48495 * 109.47024 * 330.00121 * 18 16 14 22 22 C 1.46924 * 120.62732 * 186.83081 * 8 6 4 23 23 C 1.46499 * 119.99730 * 262.93215 * 3 2 1 24 24 C 1.53784 * 113.61134 * 223.55390 * 23 3 2 25 25 C 1.53784 * 87.08001 * 220.01817 * 24 23 3 26 26 C 1.53004 * 113.61250 * 270.88138 * 25 24 23 27 27 C 1.53001 * 113.61463 * 139.97816 * 25 24 23 28 28 C 1.53779 * 87.08224 * 25.42996 * 25 24 23 29 29 H 1.09003 * 109.47236 * 60.00476 * 1 2 3 30 30 H 1.09007 * 109.46496 * 180.02562 * 1 2 3 31 31 H 1.08995 * 109.47440 * 299.99855 * 1 2 3 32 32 H 1.08995 * 109.47440 * 240.00145 * 2 1 3 33 33 H 1.09003 * 109.47236 * 119.99524 * 2 1 3 34 34 H 1.09002 * 109.58239 * 246.15124 * 9 8 6 35 35 H 1.08996 * 109.58573 * 6.57456 * 9 8 6 36 36 H 1.09000 * 109.49585 * 174.58235 * 10 9 8 37 37 H 1.08995 * 109.49718 * 294.68333 * 10 9 8 38 38 H 1.09000 * 109.46609 * 58.65768 * 11 10 9 39 39 H 1.08999 * 109.46257 * 178.61296 * 11 10 9 40 40 H 0.97001 * 119.99882 * 179.97438 * 17 16 14 41 41 H 1.08996 * 109.58667 * 353.42000 * 22 8 6 42 42 H 1.08995 * 109.58541 * 113.84406 * 22 8 6 43 43 H 1.08998 * 112.85237 * 354.85745 * 23 3 2 44 44 H 1.08998 * 113.61056 * 334.56069 * 24 23 3 45 45 H 1.08996 * 113.61743 * 105.47312 * 24 23 3 46 46 H 1.09005 * 109.46880 * 157.49498 * 26 25 24 47 47 H 1.08996 * 109.47107 * 277.49454 * 26 25 24 48 48 H 1.08996 * 109.47195 * 37.49838 * 26 25 24 49 49 H 1.08993 * 109.47309 * 322.50018 * 27 25 24 50 50 H 1.09000 * 109.46812 * 82.50654 * 27 25 24 51 51 H 1.09003 * 109.47226 * 202.49880 * 27 25 24 52 52 H 1.09003 * 113.61857 * 220.02187 * 28 25 24 53 53 H 1.09004 * 113.68887 * 89.12680 * 28 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 1.5300 0.0000 0.0000 3 7 2.0183 1.3813 0.0000 4 6 2.1074 2.0646 1.1583 5 8 2.4405 3.2314 1.1503 6 6 1.7960 1.3852 2.4525 7 8 1.3801 0.2452 2.4546 8 7 1.9770 2.0386 3.6173 9 6 2.3299 3.4649 3.6285 10 6 1.3266 4.2141 4.5111 11 6 1.2882 3.5652 5.8965 12 6 0.8272 2.1115 5.7683 13 1 -0.1585 2.0820 5.3040 14 6 0.7579 1.4832 7.1364 15 1 1.0163 2.0626 8.0104 16 6 0.3636 0.1690 7.2722 17 7 0.0476 -0.5361 6.2080 18 14 0.2770 -0.6096 8.9681 19 1 -1.0785 -0.4036 9.5386 20 1 0.5524 -2.0647 8.8593 21 1 1.2881 0.0207 9.8543 22 6 1.8193 1.3398 4.9000 23 6 2.4097 2.0198 -1.2591 24 6 3.7182 2.8219 -1.1623 25 6 3.0443 3.8787 -2.0533 26 6 3.2426 3.6346 -3.5507 27 6 3.3545 5.3183 -1.6384 28 6 1.6998 3.3593 -1.5173 29 1 -0.3634 0.5138 -0.8900 30 1 -0.3632 -1.0278 0.0005 31 1 -0.3634 0.5138 0.8899 32 1 1.8934 -0.5138 -0.8899 33 1 1.8934 -0.5138 0.8900 34 1 3.3351 3.5894 4.0311 35 1 2.2892 3.8593 2.6132 36 1 1.6325 5.2560 4.6057 37 1 0.3363 4.1647 4.0587 38 1 2.2843 3.5926 6.3383 39 1 0.5933 4.1115 6.5343 40 1 -0.2295 -1.4608 6.3036 41 1 1.4418 0.3326 4.7234 42 1 2.7820 1.2875 5.4084 43 1 2.3762 1.3372 -2.1082 44 1 3.9395 3.1764 -0.1557 45 1 4.5680 2.3298 -1.6353 46 1 2.4534 4.1385 -4.1087 47 1 4.2120 4.0271 -3.8575 48 1 3.2036 2.5642 -3.7526 49 1 3.3910 5.3831 -0.5510 50 1 4.3177 5.6162 -2.0527 51 1 2.5759 5.9811 -2.0160 52 1 0.9200 3.3009 -2.2768 53 1 1.3680 3.8601 -0.6077 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 ZINC001327382721.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 20:58:46 Heat of formation + Delta-G solvation = -29.035373 kcal Electronic energy + Delta-G solvation = -31691.010644 eV Core-core repulsion = 27757.245368 eV Total energy + Delta-G solvation = -3933.765275 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 0.81 seconds Orbital eigenvalues (eV) -41.23808 -39.49775 -37.68185 -37.13064 -35.45098 -33.22375 -31.71675 -31.10269 -29.72831 -29.30135 -27.57001 -26.01999 -25.80863 -25.01457 -23.82624 -22.97930 -21.80955 -21.28974 -19.38556 -18.59357 -18.22564 -16.95128 -16.35176 -16.20653 -15.71252 -15.58457 -15.36396 -14.57532 -14.55251 -14.37272 -13.86761 -13.77436 -13.62656 -13.33226 -13.25900 -13.09190 -13.02408 -12.87858 -12.58268 -12.46191 -12.19209 -12.05089 -11.89126 -11.76428 -11.65240 -11.31619 -11.25901 -10.99326 -10.94062 -10.83601 -10.59898 -10.42250 -10.29097 -10.21805 -10.21337 -9.90996 -9.65930 -9.13396 -9.09653 -8.70255 -8.45308 -8.20807 -7.77992 -6.01190 -4.09576 1.82414 2.66694 3.29983 3.37219 3.39805 3.64652 3.83819 4.35961 4.40775 4.43666 4.62454 4.71201 4.73666 5.06356 5.10538 5.19426 5.28897 5.44566 5.47787 5.49987 5.62438 5.64375 5.68216 5.70975 5.72212 5.75475 5.76423 5.86848 5.89685 5.93231 6.07602 6.08387 6.17011 6.24300 6.28083 6.31277 6.39597 6.45105 6.53301 6.63166 6.70655 6.79269 6.88663 7.00546 7.07457 7.22939 7.28516 7.60816 7.84032 7.96148 8.00528 8.21015 8.37034 8.63320 8.94395 9.55866 11.03936 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.019572 B = 0.003231 C = 0.002881 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1430.281047 B = 8663.886019 C = 9715.408839 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.157 4.157 2 C 0.089 3.911 3 N -0.575 5.575 4 C 0.513 3.487 5 O -0.513 6.513 6 C 0.491 3.509 7 O -0.514 6.514 8 N -0.567 5.567 9 C 0.054 3.946 10 C -0.130 4.130 11 C -0.113 4.113 12 C 0.041 3.959 13 H 0.029 0.971 14 C -0.519 4.519 15 H 0.058 0.942 16 C 0.062 3.938 17 N -0.881 5.881 18 Si 0.892 3.108 19 H -0.281 1.281 20 H -0.286 1.286 21 H -0.274 1.274 22 C 0.108 3.892 23 C 0.119 3.881 24 C -0.145 4.145 25 C -0.083 4.083 26 C -0.129 4.129 27 C -0.131 4.131 28 C -0.139 4.139 29 H 0.044 0.956 30 H 0.065 0.935 31 H 0.064 0.936 32 H 0.067 0.933 33 H 0.119 0.881 34 H 0.054 0.946 35 H 0.144 0.856 36 H 0.058 0.942 37 H 0.056 0.944 38 H 0.048 0.952 39 H 0.049 0.951 40 H 0.263 0.737 41 H 0.124 0.876 42 H 0.046 0.954 43 H 0.109 0.891 44 H 0.109 0.891 45 H 0.062 0.938 46 H 0.056 0.944 47 H 0.056 0.944 48 H 0.054 0.946 49 H 0.065 0.935 50 H 0.050 0.950 51 H 0.051 0.949 52 H 0.063 0.937 53 H 0.101 0.899 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 5.870 6.407 -18.556 20.490 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 -0.215 4.215 2 C -0.033 4.033 3 N -0.306 5.306 4 C 0.298 3.702 5 O -0.392 6.392 6 C 0.273 3.727 7 O -0.391 6.391 8 N -0.299 5.299 9 C -0.068 4.068 10 C -0.169 4.169 11 C -0.151 4.151 12 C 0.022 3.978 13 H 0.047 0.953 14 C -0.558 4.558 15 H 0.077 0.923 16 C -0.140 4.140 17 N -0.518 5.518 18 Si 0.720 3.280 19 H -0.207 1.207 20 H -0.212 1.212 21 H -0.199 1.199 22 C -0.012 4.012 23 C 0.015 3.985 24 C -0.183 4.183 25 C -0.084 4.084 26 C -0.186 4.186 27 C -0.188 4.188 28 C -0.178 4.178 29 H 0.064 0.936 30 H 0.084 0.916 31 H 0.083 0.917 32 H 0.085 0.915 33 H 0.137 0.863 34 H 0.073 0.927 35 H 0.160 0.840 36 H 0.077 0.923 37 H 0.075 0.925 38 H 0.067 0.933 39 H 0.068 0.932 40 H 0.073 0.927 41 H 0.142 0.858 42 H 0.065 0.935 43 H 0.127 0.873 44 H 0.127 0.873 45 H 0.081 0.919 46 H 0.075 0.925 47 H 0.075 0.925 48 H 0.073 0.927 49 H 0.084 0.916 50 H 0.069 0.931 51 H 0.070 0.930 52 H 0.082 0.918 53 H 0.119 0.881 Dipole moment (debyes) X Y Z Total from point charges 5.766 6.187 -18.591 20.425 hybrid contribution -0.151 -0.551 0.980 1.135 sum 5.615 5.636 -17.611 19.325 Atomic orbital electron populations 1.22047 0.95396 1.02348 1.01748 1.22232 0.95353 0.81095 1.04597 1.47905 1.62219 1.14801 1.05682 1.20692 0.77700 0.86335 0.85498 1.90232 1.47495 1.16140 1.85347 1.19840 0.81115 0.86874 0.84913 1.90659 1.44602 1.17849 1.86026 1.48449 1.64153 1.10986 1.06291 1.23064 0.97386 0.80394 1.05963 1.21909 0.99231 0.98232 0.97482 1.21659 1.00400 0.98705 0.94303 1.18871 0.94546 0.89305 0.95044 0.95324 1.21091 1.45980 0.96653 0.92046 0.92331 1.25053 0.94894 0.97397 0.96697 1.69881 1.44633 1.09311 1.28009 0.86588 0.78375 0.78494 0.84527 1.20687 1.21186 1.19921 1.22365 0.99085 1.00498 0.79224 1.22750 0.96657 0.93437 0.85608 1.23625 0.95895 0.96469 1.02281 1.21542 0.96841 0.95495 0.94518 1.21628 1.01628 1.01349 0.93967 1.21664 1.00596 0.94487 1.02054 1.23518 0.96241 0.96048 1.01960 0.93642 0.91571 0.91715 0.91467 0.86310 0.92727 0.84006 0.92295 0.92526 0.93285 0.93180 0.92690 0.85798 0.93546 0.87278 0.87260 0.91886 0.92450 0.92450 0.92676 0.91605 0.93107 0.92959 0.91842 0.88108 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 -0.16 -2.09 9.74 37.16 0.36 -1.73 16 2 C 0.09 1.16 5.75 -4.04 -0.02 1.13 16 3 N -0.57 -7.78 2.74 -165.68 -0.45 -8.24 16 4 C 0.51 8.33 7.04 -11.58 -0.08 8.25 16 5 O -0.51 -8.19 8.70 5.50 0.05 -8.14 16 6 C 0.49 9.68 7.51 -11.58 -0.09 9.59 16 7 O -0.51 -11.09 11.29 5.50 0.06 -11.03 16 8 N -0.57 -11.67 2.98 -173.54 -0.52 -12.19 16 9 C 0.05 0.95 6.16 -3.71 -0.02 0.93 16 10 C -0.13 -2.31 6.08 -26.61 -0.16 -2.48 16 11 C -0.11 -2.34 5.11 -26.69 -0.14 -2.47 16 12 C 0.04 1.03 2.24 -91.87 -0.21 0.83 16 13 H 0.03 0.80 8.14 -51.93 -0.42 0.37 16 14 C -0.52 -14.05 8.56 -34.44 -0.29 -14.34 16 15 H 0.06 1.56 7.74 -52.49 -0.41 1.15 16 16 C 0.06 1.71 5.31 -17.82 -0.09 1.61 16 17 N -0.88 -25.18 11.39 55.43 0.63 -24.54 16 18 Si 0.89 21.12 29.54 -169.99 -5.02 16.10 16 19 H -0.28 -6.62 7.11 56.52 0.40 -6.22 16 20 H -0.29 -6.75 7.11 56.52 0.40 -6.35 16 21 H -0.27 -6.39 7.11 56.52 0.40 -5.99 16 22 C 0.11 2.60 5.39 -3.93 -0.02 2.58 16 23 C 0.12 1.30 4.06 -67.12 -0.27 1.02 16 24 C -0.14 -1.57 6.48 -25.92 -0.17 -1.74 16 25 C -0.08 -0.79 1.39 -153.69 -0.21 -1.01 16 26 C -0.13 -0.97 9.07 37.16 0.34 -0.63 16 27 C -0.13 -1.25 9.20 37.16 0.34 -0.91 16 28 C -0.14 -1.52 6.58 -25.92 -0.17 -1.69 16 29 H 0.04 0.53 8.14 -51.93 -0.42 0.11 16 30 H 0.07 0.81 8.14 -51.92 -0.42 0.39 16 31 H 0.06 1.07 7.04 -51.93 -0.37 0.70 16 32 H 0.07 0.68 7.85 -51.93 -0.41 0.27 16 33 H 0.12 1.86 5.37 -51.93 -0.28 1.58 16 34 H 0.05 0.93 8.14 -51.93 -0.42 0.50 16 35 H 0.14 2.41 3.92 -56.59 -0.22 2.19 16 36 H 0.06 0.89 8.14 -51.93 -0.42 0.47 16 37 H 0.06 1.04 8.14 -51.93 -0.42 0.62 16 38 H 0.05 0.99 8.14 -51.93 -0.42 0.57 16 39 H 0.05 1.02 8.14 -51.93 -0.42 0.59 16 40 H 0.26 7.23 8.31 -40.82 -0.34 6.89 16 41 H 0.12 3.39 5.11 -51.93 -0.27 3.13 16 42 H 0.05 1.12 8.14 -51.93 -0.42 0.69 16 43 H 0.11 0.97 7.40 -51.93 -0.38 0.59 16 44 H 0.11 1.45 5.49 -51.93 -0.29 1.16 16 45 H 0.06 0.61 8.10 -51.93 -0.42 0.19 16 46 H 0.06 0.41 8.14 -51.93 -0.42 -0.02 16 47 H 0.06 0.40 8.14 -51.93 -0.42 -0.02 16 48 H 0.05 0.38 7.34 -51.93 -0.38 0.00 16 49 H 0.06 0.73 7.94 -51.93 -0.41 0.32 16 50 H 0.05 0.43 8.14 -51.93 -0.42 0.01 16 51 H 0.05 0.47 8.14 -51.93 -0.42 0.05 16 52 H 0.06 0.62 8.10 -51.93 -0.42 0.20 16 53 H 0.10 1.34 6.22 -51.93 -0.32 1.02 16 LS Contribution 395.41 15.07 5.96 5.96 Total: -1.00 -28.55 395.41 -9.41 -37.96 By element: Atomic # 1 Polarization: 14.39 SS G_CDS: -9.20 Total: 5.19 kcal Atomic # 6 Polarization: -0.14 SS G_CDS: -0.91 Total: -1.06 kcal Atomic # 7 Polarization: -44.63 SS G_CDS: -0.34 Total: -44.97 kcal Atomic # 8 Polarization: -19.28 SS G_CDS: 0.11 Total: -19.17 kcal Atomic # 14 Polarization: 21.12 SS G_CDS: -5.02 Total: 16.10 kcal Total LS contribution 5.96 Total: 5.96 kcal Total: -28.55 -9.41 -37.96 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. ZINC001327382721.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 8.925 kcal (2) G-P(sol) polarization free energy of solvation -28.550 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -19.625 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.410 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -37.960 kcal (6) G-S(sol) free energy of system = (1) + (5) -29.035 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds