Wall clock time and date at job start Sat Apr 11 2020 06:12:46 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 1.53005 * 1 3 3 O 1.42905 * 109.46695 * 2 1 4 4 C 1.42896 * 113.99654 * 180.02562 * 3 2 1 5 5 H 1.09001 * 109.47291 * 29.99844 * 4 3 2 6 6 C 1.50704 * 109.47222 * 269.99911 * 4 3 2 7 7 O 1.21283 * 119.99603 * 355.00259 * 6 4 3 8 8 N 1.34770 * 120.00378 * 175.00316 * 6 4 3 9 9 C 1.46499 * 120.00316 * 180.02562 * 8 6 4 10 10 C 1.53000 * 109.47328 * 179.97438 * 9 8 6 11 11 O 1.42901 * 110.64147 * 298.31366 * 10 9 8 12 12 C 1.55156 * 110.87335 * 175.05954 * 10 9 8 13 13 C 1.54908 * 101.58197 * 206.06318 * 12 10 9 14 14 N 1.47422 * 104.83357 * 37.01425 * 13 12 10 15 15 C 1.36934 * 125.65321 * 155.91756 * 14 13 12 16 16 H 1.07997 * 120.00156 * 179.97438 * 15 14 13 17 17 C 1.38816 * 119.99339 * 359.94052 * 15 14 13 18 18 N 1.31619 * 120.00310 * 0.02562 * 17 15 14 19 19 Si 1.86800 * 119.99553 * 180.02562 * 17 15 14 20 20 H 1.48497 * 109.47325 * 0.02562 * 19 17 15 21 21 H 1.48508 * 109.47031 * 120.00517 * 19 17 15 22 22 H 1.48504 * 109.47085 * 240.00294 * 19 17 15 23 23 C 1.47031 * 108.70136 * 335.86884 * 14 13 12 24 24 C 1.52998 * 109.47022 * 150.00026 * 4 3 2 25 25 C 1.54266 * 110.03267 * 57.90685 * 24 4 3 26 26 C 1.54966 * 104.16102 * 217.13593 * 25 24 4 27 27 C 1.54889 * 102.77683 * 37.88818 * 26 25 24 28 28 C 1.53874 * 110.03322 * 300.69089 * 24 4 3 29 29 H 1.08999 * 109.47555 * 299.99915 * 1 2 3 30 30 H 1.08997 * 109.46920 * 60.00306 * 1 2 3 31 31 H 1.09006 * 109.46648 * 179.97438 * 1 2 3 32 32 H 1.09003 * 109.47089 * 240.00243 * 2 1 3 33 33 H 1.08997 * 109.46920 * 119.99693 * 2 1 3 34 34 H 0.97000 * 119.99560 * 359.97438 * 8 6 4 35 35 H 1.08993 * 109.47057 * 59.99717 * 9 8 6 36 36 H 1.09000 * 109.47069 * 299.99751 * 9 8 6 37 37 H 0.96700 * 113.99903 * 61.68269 * 11 10 9 38 38 H 1.08999 * 111.00338 * 324.14259 * 12 10 9 39 39 H 1.09003 * 110.99778 * 87.99041 * 12 10 9 40 40 H 1.09000 * 110.36459 * 155.84880 * 13 12 10 41 41 H 1.08998 * 110.36772 * 278.17049 * 13 12 10 42 42 H 0.97000 * 119.99728 * 179.97438 * 18 17 15 43 43 H 1.08998 * 109.88059 * 241.64343 * 23 14 13 44 44 H 1.08994 * 109.87878 * 120.47623 * 23 14 13 45 45 H 1.08997 * 110.01714 * 179.29771 * 24 4 3 46 46 H 1.08996 * 110.48843 * 335.78132 * 25 24 4 47 47 H 1.09001 * 110.49111 * 98.42866 * 25 24 4 48 48 H 1.08996 * 110.72103 * 279.57256 * 26 25 24 49 49 H 1.09000 * 110.76634 * 156.21719 * 26 25 24 50 50 H 1.09003 * 110.48708 * 203.40633 * 27 26 25 51 51 H 1.08996 * 110.48795 * 80.76113 * 27 26 25 52 52 H 1.09005 * 110.03173 * 238.57164 * 28 24 4 53 53 H 1.09001 * 110.03077 * 359.94458 * 28 24 4 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 1.5301 0.0000 0.0000 3 8 2.0063 1.3474 0.0000 4 6 3.4308 1.4602 -0.0006 5 1 3.8631 0.6018 -0.5147 6 6 3.9322 1.4997 1.4201 7 8 3.1434 1.5288 2.3409 8 7 5.2570 1.5026 1.6673 9 6 5.7444 1.5404 3.0483 10 6 7.2744 1.5351 3.0496 11 8 7.7745 0.3384 2.4497 12 6 7.8266 1.6993 4.4902 13 6 9.2137 2.3344 4.2211 14 7 8.9975 3.2441 3.0813 15 6 9.7622 4.3386 2.7774 16 1 9.5206 4.9440 1.9163 17 6 10.8477 4.6703 3.5766 18 7 11.1421 3.9325 4.6261 19 14 11.8906 6.1637 3.1625 20 1 11.3537 6.8197 1.9432 21 1 11.8549 7.1222 4.2963 22 1 13.2919 5.7368 2.9192 23 6 7.8253 2.7809 2.3242 24 6 3.8402 2.7459 -0.7218 25 6 3.1923 3.9661 -0.0354 26 6 2.8367 4.9157 -1.2073 27 6 2.3724 3.9359 -2.3134 28 6 3.3195 2.7268 -2.1696 29 1 -0.3634 0.5138 0.8900 30 1 -0.3633 0.5138 -0.8900 31 1 -0.3633 -1.0278 -0.0005 32 1 1.8934 -0.5138 -0.8900 33 1 1.8933 -0.5138 0.8900 34 1 5.8878 1.4790 0.9308 35 1 5.3780 0.6667 3.5870 36 1 5.3835 2.4458 3.5363 37 1 7.5213 0.2275 1.5230 38 1 7.1971 2.3691 5.0759 39 1 7.9287 0.7319 4.9820 40 1 9.5506 2.8936 5.0940 41 1 9.9393 1.5643 3.9595 42 1 11.9008 4.1642 5.1843 43 1 8.1204 2.5181 1.3083 44 1 7.0661 3.5626 2.3015 45 1 4.9255 2.8472 -0.7166 46 1 2.2913 3.6683 0.5008 47 1 3.9003 4.4435 0.6420 48 1 3.7146 5.4751 -1.5304 49 1 2.0289 5.5912 -0.9258 50 1 2.4822 4.3917 -3.2974 51 1 1.3389 3.6330 -2.1454 52 1 4.1521 2.8197 -2.8671 53 1 2.7760 1.8011 -2.3588 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 ZINC001500704218.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 06:12:46 Heat of formation + Delta-G solvation = -119.567575 kcal Electronic energy + Delta-G solvation = -31634.687544 eV Core-core repulsion = 27506.540447 eV Total energy + Delta-G solvation = -4128.147098 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.81 seconds Orbital eigenvalues (eV) -40.55919 -39.00129 -37.92530 -37.11520 -35.16009 -34.17809 -32.28771 -31.99097 -30.23412 -29.49010 -28.84661 -28.18681 -26.14892 -25.17278 -23.43621 -23.04545 -21.21341 -20.70819 -20.18479 -19.94507 -19.75852 -18.11866 -17.09304 -16.91546 -16.44065 -15.87633 -15.70944 -15.52355 -15.14511 -14.89083 -14.76022 -14.29122 -14.01523 -13.85120 -13.60606 -13.39462 -13.29035 -13.03367 -12.93612 -12.54470 -12.26389 -12.14402 -12.10121 -11.66517 -11.61354 -11.53735 -11.27660 -11.14879 -11.05860 -10.91322 -10.84803 -10.78704 -10.72945 -10.70881 -10.51647 -10.36043 -10.14690 -10.02260 -9.74492 -9.50575 -9.25301 -9.09193 -8.68370 -6.88982 -5.69269 -3.11729 2.53331 2.94059 3.37283 3.42406 3.45188 3.45862 4.28428 4.38861 4.41789 4.44460 4.51055 4.63499 4.73943 4.83546 4.90777 4.96913 5.08084 5.13651 5.16036 5.30159 5.34606 5.38021 5.41925 5.44683 5.47285 5.56115 5.60552 5.61038 5.68759 5.72423 5.79348 5.85901 5.87684 5.95595 5.96266 6.10804 6.13592 6.20996 6.30341 6.32501 6.37693 6.46658 6.57166 6.60115 6.83731 7.39916 7.53277 7.58142 7.81191 7.89362 8.15845 8.31279 9.17197 9.77676 10.41785 11.34554 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.013936 B = 0.002889 C = 0.002511 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2008.728326 B = 9688.260111 C =11149.428708 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.148 4.148 2 C 0.054 3.946 3 O -0.348 6.348 4 C 0.082 3.918 5 H 0.084 0.916 6 C 0.491 3.509 7 O -0.525 6.525 8 N -0.725 5.725 9 C 0.106 3.894 10 C 0.105 3.895 11 O -0.543 6.543 12 C -0.128 4.128 13 C 0.156 3.844 14 N -0.600 5.600 15 C -0.225 4.225 16 H 0.077 0.923 17 C -0.010 4.010 18 N -0.920 5.920 19 Si 0.915 3.085 20 H -0.280 1.280 21 H -0.290 1.290 22 H -0.290 1.290 23 C 0.117 3.883 24 C -0.086 4.086 25 C -0.120 4.120 26 C -0.123 4.123 27 C -0.119 4.119 28 C -0.113 4.113 29 H 0.065 0.935 30 H 0.061 0.939 31 H 0.069 0.931 32 H 0.047 0.953 33 H 0.050 0.950 34 H 0.397 0.603 35 H 0.073 0.927 36 H 0.078 0.922 37 H 0.363 0.637 38 H 0.076 0.924 39 H 0.070 0.930 40 H 0.108 0.892 41 H 0.018 0.982 42 H 0.252 0.748 43 H 0.022 0.978 44 H 0.031 0.969 45 H 0.089 0.911 46 H 0.080 0.920 47 H 0.065 0.935 48 H 0.066 0.934 49 H 0.064 0.936 50 H 0.061 0.939 51 H 0.067 0.933 52 H 0.065 0.935 53 H 0.067 0.933 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -18.501 -6.968 -12.979 23.650 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 -0.205 4.205 2 C -0.022 4.022 3 O -0.265 6.265 4 C 0.020 3.980 5 H 0.101 0.899 6 C 0.277 3.723 7 O -0.400 6.400 8 N -0.379 5.379 9 C -0.018 4.018 10 C 0.064 3.936 11 O -0.347 6.347 12 C -0.167 4.167 13 C 0.031 3.969 14 N -0.326 5.326 15 C -0.353 4.353 16 H 0.095 0.905 17 C -0.206 4.206 18 N -0.568 5.568 19 Si 0.746 3.254 20 H -0.205 1.205 21 H -0.217 1.217 22 H -0.217 1.217 23 C -0.009 4.009 24 C -0.105 4.105 25 C -0.157 4.157 26 C -0.161 4.161 27 C -0.157 4.157 28 C -0.150 4.150 29 H 0.084 0.916 30 H 0.080 0.920 31 H 0.088 0.912 32 H 0.065 0.935 33 H 0.068 0.932 34 H 0.231 0.769 35 H 0.091 0.909 36 H 0.097 0.903 37 H 0.209 0.791 38 H 0.094 0.906 39 H 0.089 0.911 40 H 0.126 0.874 41 H 0.036 0.964 42 H 0.063 0.937 43 H 0.040 0.960 44 H 0.049 0.951 45 H 0.107 0.893 46 H 0.099 0.901 47 H 0.084 0.916 48 H 0.084 0.916 49 H 0.083 0.917 50 H 0.080 0.920 51 H 0.085 0.915 52 H 0.083 0.917 53 H 0.085 0.915 Dipole moment (debyes) X Y Z Total from point charges -18.781 -6.756 -11.620 23.095 hybrid contribution 0.900 0.471 -1.108 1.503 sum -17.881 -6.285 -12.728 22.830 Atomic orbital electron populations 1.21696 0.93486 1.02134 1.03187 1.22576 0.95961 0.83764 0.99930 1.88004 1.17930 1.26260 1.94311 1.22030 0.83775 0.99983 0.92194 0.89871 1.21319 0.82385 0.76452 0.92185 1.90710 1.55091 1.48186 1.46038 1.46042 1.06973 1.75610 1.09310 1.22055 0.94251 1.02992 0.82514 1.22573 0.89168 0.85088 0.96803 1.86634 1.77739 1.41736 1.28619 1.23050 1.00887 1.00993 0.91768 1.21940 0.89583 0.91760 0.93570 1.44424 1.30004 1.29558 1.28592 1.19096 1.06118 1.01195 1.08890 0.90473 1.24802 0.98709 0.99324 0.97728 1.69802 1.29848 1.39481 1.17706 0.85993 0.80065 0.81908 0.77474 1.20529 1.21666 1.21704 1.21917 0.91236 0.93334 0.94458 1.21931 1.00463 0.92832 0.95228 1.22404 1.01379 0.94367 0.97589 1.22481 1.00813 0.97390 0.95386 1.22295 0.99480 0.95502 0.98420 1.22097 0.99022 0.99217 0.94706 0.91598 0.91960 0.91211 0.93501 0.93157 0.76910 0.90885 0.90335 0.79085 0.90587 0.91087 0.87421 0.96383 0.93672 0.96026 0.95138 0.89284 0.90105 0.91633 0.91570 0.91673 0.92028 0.91470 0.91656 0.91472 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -1.16 10.28 37.16 0.38 -0.78 16 2 C 0.05 0.50 6.46 37.16 0.24 0.74 16 3 O -0.35 -3.92 7.98 -55.09 -0.44 -4.35 16 4 C 0.08 0.83 2.05 -27.88 -0.06 0.77 16 5 H 0.08 0.65 7.79 -51.93 -0.40 0.24 16 6 C 0.49 6.44 6.51 -10.99 -0.07 6.37 16 7 O -0.52 -9.02 16.51 -14.31 -0.24 -9.25 16 8 N -0.73 -8.72 5.14 -60.30 -0.31 -9.03 16 9 C 0.11 1.54 4.74 -4.04 -0.02 1.52 16 10 C 0.11 1.77 0.92 -88.78 -0.08 1.68 16 11 O -0.54 -8.78 13.09 -35.23 -0.46 -9.24 16 12 C -0.13 -2.44 6.26 -24.58 -0.15 -2.60 16 13 C 0.16 3.81 5.88 -2.53 -0.01 3.79 16 14 N -0.60 -15.11 3.39 -170.07 -0.58 -15.69 16 15 C -0.22 -6.19 10.27 -15.06 -0.15 -6.34 16 16 H 0.08 2.05 7.83 -52.49 -0.41 1.64 16 17 C -0.01 -0.28 5.49 -17.43 -0.10 -0.37 16 18 N -0.92 -26.70 10.09 55.49 0.56 -26.14 16 19 Si 0.92 21.88 29.55 -169.99 -5.02 16.86 16 20 H -0.28 -6.48 7.11 56.52 0.40 -6.08 16 21 H -0.29 -6.96 7.11 56.52 0.40 -6.56 16 22 H -0.29 -6.99 7.11 56.52 0.40 -6.59 16 23 C 0.12 2.30 6.02 -3.06 -0.02 2.29 16 24 C -0.09 -0.80 2.79 -89.50 -0.25 -1.05 16 25 C -0.12 -1.32 5.65 -25.03 -0.14 -1.46 16 26 C -0.12 -1.15 6.91 -24.70 -0.17 -1.32 16 27 C -0.12 -0.99 6.83 -25.07 -0.17 -1.16 16 28 C -0.11 -0.90 6.21 -25.61 -0.16 -1.06 16 29 H 0.06 0.60 8.14 -51.93 -0.42 0.17 16 30 H 0.06 0.46 8.14 -51.93 -0.42 0.03 16 31 H 0.07 0.42 8.14 -51.93 -0.42 0.00 16 32 H 0.05 0.34 8.08 -51.93 -0.42 -0.08 16 33 H 0.05 0.52 8.14 -51.93 -0.42 0.10 16 34 H 0.40 3.86 7.19 -40.82 -0.29 3.56 16 35 H 0.07 1.09 8.14 -51.93 -0.42 0.67 16 36 H 0.08 1.25 8.13 -51.93 -0.42 0.82 16 37 H 0.36 4.27 8.12 45.56 0.37 4.64 16 38 H 0.08 1.38 8.05 -51.93 -0.42 0.97 16 39 H 0.07 1.26 8.14 -51.93 -0.42 0.84 16 40 H 0.11 2.93 5.87 -51.93 -0.31 2.63 16 41 H 0.02 0.48 8.14 -51.93 -0.42 0.06 16 42 H 0.25 7.09 8.31 -40.82 -0.34 6.75 16 43 H 0.02 0.41 8.05 -51.93 -0.42 -0.01 16 44 H 0.03 0.60 7.82 -51.93 -0.41 0.19 16 45 H 0.09 0.76 7.95 -51.93 -0.41 0.35 16 46 H 0.08 1.05 7.15 -51.93 -0.37 0.68 16 47 H 0.06 0.79 8.14 -51.93 -0.42 0.37 16 48 H 0.07 0.60 8.14 -51.93 -0.42 0.18 16 49 H 0.06 0.59 8.14 -51.93 -0.42 0.16 16 50 H 0.06 0.45 8.14 -51.93 -0.42 0.03 16 51 H 0.07 0.58 8.14 -51.93 -0.42 0.16 16 52 H 0.06 0.46 8.14 -51.93 -0.42 0.04 16 53 H 0.07 0.52 7.40 -51.93 -0.38 0.14 16 LS Contribution 413.94 15.07 6.24 6.24 Total: -1.00 -33.38 413.94 -10.11 -43.50 By element: Atomic # 1 Polarization: 15.02 SS G_CDS: -8.93 Total: 6.09 kcal Atomic # 6 Polarization: 1.96 SS G_CDS: -0.94 Total: 1.02 kcal Atomic # 7 Polarization: -50.53 SS G_CDS: -0.33 Total: -50.86 kcal Atomic # 8 Polarization: -21.71 SS G_CDS: -1.14 Total: -22.85 kcal Atomic # 14 Polarization: 21.88 SS G_CDS: -5.02 Total: 16.86 kcal Total LS contribution 6.24 Total: 6.24 kcal Total: -33.38 -10.11 -43.50 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. ZINC001500704218.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 -76.071 kcal (2) G-P(sol) polarization free energy of solvation -33.382 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -109.453 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.114 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.496 kcal (6) G-S(sol) free energy of system = (1) + (5) -119.568 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds