Wall clock time and date at job start Sat Apr 11 2020 06:13:19 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 1.52998 * 1 3 3 O 1.42901 * 109.47063 * 2 1 4 4 C 1.42901 * 113.99895 * 185.24219 * 3 2 1 5 5 H 1.08992 * 109.47186 * 359.82682 * 4 3 2 6 6 C 1.50698 * 109.47025 * 239.82233 * 4 3 2 7 7 O 1.21278 * 120.00135 * 355.00389 * 6 4 3 8 8 N 1.34784 * 119.99633 * 174.99965 * 6 4 3 9 9 C 1.46497 * 119.99533 * 180.02562 * 8 6 4 10 10 H 1.08999 * 109.47279 * 325.00192 * 9 8 6 11 11 C 1.53002 * 109.47336 * 85.00205 * 9 8 6 12 12 C 1.52995 * 109.47426 * 179.97438 * 11 9 8 13 13 C 1.53002 * 109.46990 * 299.99903 * 12 11 9 14 14 H 1.08999 * 109.47417 * 299.99944 * 13 12 11 15 15 N 1.46505 * 109.47223 * 179.97438 * 13 12 11 16 16 C 1.36931 * 120.00182 * 85.00148 * 15 13 12 17 17 H 1.08007 * 119.99902 * 359.97438 * 16 15 13 18 18 C 1.38814 * 120.00195 * 180.02562 * 16 15 13 19 19 N 1.31613 * 119.99839 * 359.97438 * 18 16 15 20 20 Si 1.86798 * 119.99801 * 179.97438 * 18 16 15 21 21 H 1.48499 * 109.47212 * 59.99961 * 20 18 16 22 22 H 1.48506 * 109.46963 * 179.97438 * 20 18 16 23 23 H 1.48498 * 109.47391 * 299.99700 * 20 18 16 24 24 C 1.53002 * 109.47186 * 60.00123 * 13 12 11 25 25 C 1.53002 * 109.46797 * 204.99934 * 9 8 6 26 26 C 1.53003 * 109.47052 * 119.82492 * 4 3 2 27 27 H 1.08996 * 110.45790 * 179.43294 * 26 4 3 28 28 C 1.54510 * 110.51026 * 302.03924 * 26 4 3 29 29 C 1.54476 * 104.06363 * 118.64172 * 28 26 4 30 30 O 1.44424 * 104.80333 * 23.98227 * 29 28 26 31 31 C 1.44644 * 105.36801 * 319.55881 * 30 29 28 32 32 H 1.08997 * 109.46974 * 60.00373 * 1 2 3 33 33 H 1.08999 * 109.47194 * 179.97438 * 1 2 3 34 34 H 1.09000 * 109.47444 * 300.00301 * 1 2 3 35 35 H 1.09000 * 109.47444 * 239.99699 * 2 1 3 36 36 H 1.09007 * 109.46808 * 119.99696 * 2 1 3 37 37 H 0.96997 * 120.00272 * 0.02562 * 8 6 4 38 38 H 1.08995 * 109.47006 * 300.00007 * 11 9 8 39 39 H 1.08999 * 109.46948 * 59.99784 * 11 9 8 40 40 H 1.09003 * 109.47444 * 59.99900 * 12 11 9 41 41 H 1.09003 * 109.47469 * 180.02562 * 12 11 9 42 42 H 0.97002 * 119.99799 * 265.00305 * 15 13 12 43 43 H 0.96998 * 120.00051 * 180.02562 * 19 18 16 44 44 H 1.08995 * 109.47235 * 179.97438 * 24 13 12 45 45 H 1.08999 * 109.47089 * 59.99619 * 24 13 12 46 46 H 1.09002 * 109.47214 * 60.00380 * 25 9 8 47 47 H 1.08999 * 109.47417 * 300.00173 * 25 9 8 48 48 H 1.08997 * 110.51062 * 237.29026 * 28 26 4 49 49 H 1.09002 * 110.51603 * 359.85744 * 28 26 4 50 50 H 1.09001 * 110.36879 * 142.80775 * 29 28 26 51 51 H 1.08997 * 110.37804 * 265.03348 * 29 28 26 52 52 H 1.08996 * 110.34284 * 281.60209 * 31 30 29 53 53 H 1.08991 * 110.51130 * 159.18698 * 31 30 29 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 8 2.0063 1.3473 0.0000 4 6 3.4257 1.4619 -0.1193 5 1 3.8663 0.4672 -0.1847 6 6 3.9752 2.1764 1.0884 7 8 3.2188 2.6304 1.9207 8 7 5.3073 2.3107 1.2437 9 6 5.8415 3.0048 2.4181 10 1 5.1732 3.8209 2.6930 11 6 5.9525 2.0215 3.5850 12 6 6.5109 2.7462 4.8113 13 6 7.8959 3.3083 4.4846 14 1 8.5638 2.4920 4.2095 15 7 8.4305 4.0028 5.6586 16 6 9.0902 3.2979 6.6296 17 1 9.2161 2.2298 6.5302 18 6 9.5962 3.9559 7.7423 19 7 9.4423 5.2573 7.8636 20 14 10.4955 2.9940 9.0672 21 1 11.6822 2.3262 8.4748 22 1 10.9345 3.9217 10.1405 23 1 9.5853 1.9697 9.6394 24 6 7.7850 4.2917 3.3177 25 6 7.2264 3.5674 2.0917 26 6 3.7690 2.2558 -1.3814 27 1 4.8490 2.3616 -1.4829 28 6 3.1723 1.5704 -2.6310 29 6 2.2002 2.6230 -3.2083 30 8 2.6942 3.8889 -2.7193 31 6 3.0897 3.6429 -1.3499 32 1 -0.3633 0.5138 -0.8900 33 1 -0.3633 -1.0276 -0.0005 34 1 -0.3634 0.5139 0.8899 35 1 1.8934 -0.5139 -0.8899 36 1 1.8933 -0.5138 0.8901 37 1 5.9122 1.9479 0.5780 38 1 4.9659 1.6207 3.8174 39 1 6.6207 1.2054 3.3101 40 1 5.8431 3.5626 5.0864 41 1 6.5904 2.0456 5.6425 42 1 8.3170 4.9620 5.7480 43 1 9.7962 5.7171 8.6409 44 1 8.7715 4.6925 3.0852 45 1 7.1171 5.1080 3.5927 46 1 7.1473 4.2680 1.2604 47 1 7.8946 2.7513 1.8168 48 1 3.9571 1.3395 -3.3514 49 1 2.6349 0.6647 -2.3500 50 1 2.2222 2.6025 -4.2979 51 1 1.1878 2.4434 -2.8466 52 1 2.2145 3.6221 -0.7006 53 1 3.7947 4.4030 -1.0136 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 ZINC001714305198.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 06:13:19 Heat of formation + Delta-G solvation = -133.951180 kcal Electronic energy + Delta-G solvation = -30929.275261 eV Core-core repulsion = 26800.504443 eV Total energy + Delta-G solvation = -4128.770818 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) -40.84034 -39.40158 -38.26331 -37.47514 -34.87656 -33.69267 -32.85529 -31.40900 -30.72776 -30.41929 -29.72311 -27.76560 -26.25791 -23.70636 -23.56715 -22.92243 -22.37326 -21.45072 -20.97427 -20.36576 -19.48096 -17.91202 -17.36708 -17.00202 -16.58337 -16.46939 -15.96517 -15.48990 -15.29324 -15.18407 -14.75636 -14.48296 -14.19726 -13.84532 -13.76465 -13.56154 -13.50885 -13.06326 -12.96035 -12.65944 -12.56255 -12.40313 -12.08312 -12.03356 -11.82372 -11.77109 -11.67159 -11.44454 -11.33953 -11.12905 -11.03676 -10.80393 -10.77029 -10.67440 -10.42806 -10.20492 -10.11173 -10.04207 -9.76833 -9.64942 -9.43064 -9.00787 -8.83982 -6.93293 -5.74395 -3.02927 2.43422 2.69234 3.42142 3.44687 3.49124 3.50179 3.62773 3.99092 4.26633 4.42685 4.46676 4.55316 4.60387 4.70386 4.72123 4.89567 4.91401 4.95460 4.97715 4.98410 5.04081 5.26593 5.28169 5.31809 5.37716 5.52061 5.52696 5.53853 5.57152 5.59904 5.67085 5.69388 5.72621 5.76860 5.84189 5.86930 6.01700 6.23165 6.24940 6.29217 6.45724 6.46473 6.55865 6.61318 6.68663 6.73429 6.99100 7.15488 7.38933 7.71050 8.11333 8.44477 9.55226 10.14007 10.48493 11.48314 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.021717 B = 0.002116 C = 0.002000 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1289.002350 B =13228.323925 C =13995.891863 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.151 4.151 2 C 0.053 3.947 3 O -0.350 6.350 4 C 0.081 3.919 5 H 0.091 0.909 6 C 0.499 3.501 7 O -0.514 6.514 8 N -0.724 5.724 9 C 0.146 3.854 10 H 0.088 0.912 11 C -0.123 4.123 12 C -0.132 4.132 13 C 0.178 3.822 14 H 0.045 0.955 15 N -0.725 5.725 16 C -0.238 4.238 17 H 0.069 0.931 18 C -0.015 4.015 19 N -0.933 5.933 20 Si 0.906 3.094 21 H -0.287 1.287 22 H -0.291 1.291 23 H -0.286 1.286 24 C -0.121 4.121 25 C -0.118 4.118 26 C -0.127 4.127 27 H 0.098 0.902 28 C -0.146 4.146 29 C 0.049 3.951 30 O -0.375 6.375 31 C 0.053 3.947 32 H 0.062 0.938 33 H 0.071 0.929 34 H 0.067 0.933 35 H 0.049 0.951 36 H 0.051 0.949 37 H 0.396 0.604 38 H 0.056 0.944 39 H 0.058 0.942 40 H 0.056 0.944 41 H 0.063 0.937 42 H 0.384 0.616 43 H 0.255 0.745 44 H 0.068 0.932 45 H 0.062 0.938 46 H 0.063 0.937 47 H 0.065 0.935 48 H 0.078 0.922 49 H 0.078 0.922 50 H 0.089 0.911 51 H 0.061 0.939 52 H 0.077 0.923 53 H 0.091 0.909 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -14.306 -11.196 -25.261 31.115 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 -0.208 4.208 2 C -0.023 4.023 3 O -0.268 6.268 4 C 0.019 3.981 5 H 0.109 0.891 6 C 0.283 3.717 7 O -0.388 6.388 8 N -0.377 5.377 9 C 0.042 3.958 10 H 0.106 0.894 11 C -0.162 4.162 12 C -0.173 4.173 13 C 0.068 3.932 14 H 0.063 0.937 15 N -0.366 5.366 16 C -0.369 4.369 17 H 0.087 0.913 18 C -0.211 4.211 19 N -0.582 5.582 20 Si 0.737 3.263 21 H -0.213 1.213 22 H -0.217 1.217 23 H -0.213 1.213 24 C -0.160 4.160 25 C -0.157 4.157 26 C -0.147 4.147 27 H 0.116 0.884 28 C -0.184 4.184 29 C -0.028 4.028 30 O -0.294 6.294 31 C -0.024 4.024 32 H 0.081 0.919 33 H 0.090 0.910 34 H 0.086 0.914 35 H 0.068 0.932 36 H 0.069 0.931 37 H 0.230 0.770 38 H 0.075 0.925 39 H 0.076 0.924 40 H 0.075 0.925 41 H 0.082 0.918 42 H 0.217 0.783 43 H 0.065 0.935 44 H 0.087 0.913 45 H 0.081 0.919 46 H 0.082 0.918 47 H 0.084 0.916 48 H 0.097 0.903 49 H 0.097 0.903 50 H 0.107 0.893 51 H 0.080 0.920 52 H 0.095 0.905 53 H 0.109 0.891 Dipole moment (debyes) X Y Z Total from point charges -14.899 -10.603 -24.618 30.667 hybrid contribution 0.938 -0.954 0.709 1.514 sum -13.961 -11.558 -23.910 30.003 Atomic orbital electron populations 1.21726 0.93267 1.02327 1.03455 1.22703 0.96181 0.83429 1.00032 1.88035 1.18214 1.26467 1.94059 1.21899 0.84155 0.99501 0.92561 0.89088 1.20751 0.82706 0.80777 0.87465 1.90750 1.57536 1.47024 1.43503 1.46181 1.06362 1.59214 1.25902 1.21128 0.95208 0.95061 0.84378 0.89389 1.21890 1.00747 0.98058 0.95544 1.22228 0.99205 0.99950 0.95948 1.20233 0.92276 0.93580 0.87136 0.93651 1.42425 1.66245 1.07644 1.20261 1.19189 1.27408 0.91866 0.98420 0.91320 1.24740 1.01837 0.95715 0.98763 1.69647 1.51163 1.06967 1.30397 0.86287 0.79629 0.78704 0.81678 1.21331 1.21721 1.21322 1.21747 1.01012 0.98857 0.94346 1.21740 0.94823 1.00187 0.98927 1.22889 1.01717 0.96601 0.93463 0.88367 1.22948 0.99604 0.99400 0.96407 1.23342 0.97075 0.82984 0.99419 1.89149 1.83120 1.30687 1.26459 1.23472 0.99592 0.94894 0.84409 0.91867 0.90991 0.91416 0.93246 0.93054 0.77032 0.92478 0.92364 0.92471 0.91827 0.78289 0.93489 0.91331 0.91944 0.91832 0.91591 0.90323 0.90350 0.89306 0.92031 0.90478 0.89095 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 14. 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 -0.97 10.28 37.16 0.38 -0.59 16 2 C 0.05 0.38 6.07 37.16 0.23 0.61 16 3 O -0.35 -3.50 8.07 -55.09 -0.44 -3.94 16 4 C 0.08 0.68 2.29 -27.88 -0.06 0.62 16 5 H 0.09 0.54 7.60 -51.93 -0.39 0.15 16 6 C 0.50 5.86 6.58 -10.98 -0.07 5.78 16 7 O -0.51 -8.53 16.17 -14.30 -0.23 -8.77 16 8 N -0.72 -7.22 5.04 -53.81 -0.27 -7.49 16 9 C 0.15 1.86 2.46 -67.93 -0.17 1.69 16 10 H 0.09 1.33 7.58 -51.93 -0.39 0.94 16 11 C -0.12 -1.79 5.49 -26.73 -0.15 -1.94 16 12 C -0.13 -2.40 5.50 -26.73 -0.15 -2.55 16 13 C 0.18 3.43 2.77 -67.93 -0.19 3.25 16 14 H 0.05 0.89 8.08 -51.93 -0.42 0.47 16 15 N -0.73 -18.11 5.12 -53.42 -0.27 -18.38 16 16 C -0.24 -6.58 9.93 -15.06 -0.15 -6.73 16 17 H 0.07 1.85 7.83 -52.48 -0.41 1.43 16 18 C -0.01 -0.42 5.50 -17.43 -0.10 -0.52 16 19 N -0.93 -28.35 13.06 55.49 0.72 -27.62 16 20 Si 0.91 22.48 29.55 -169.99 -5.02 17.46 16 21 H -0.29 -6.97 7.11 56.52 0.40 -6.57 16 22 H -0.29 -7.30 7.11 56.52 0.40 -6.89 16 23 H -0.29 -7.01 7.11 56.52 0.40 -6.61 16 24 C -0.12 -1.90 5.39 -26.75 -0.14 -2.04 16 25 C -0.12 -1.40 5.39 -26.75 -0.14 -1.55 16 26 C -0.13 -0.93 3.00 -89.05 -0.27 -1.19 16 27 H 0.10 0.56 7.97 -51.93 -0.41 0.14 16 28 C -0.15 -0.85 6.48 -25.16 -0.16 -1.02 16 29 C 0.05 0.36 7.64 37.93 0.29 0.65 16 30 O -0.38 -4.02 11.65 -35.23 -0.41 -4.43 16 31 C 0.05 0.53 6.55 37.94 0.25 0.78 16 32 H 0.06 0.39 8.14 -51.93 -0.42 -0.04 16 33 H 0.07 0.33 8.14 -51.93 -0.42 -0.09 16 34 H 0.07 0.53 8.14 -51.93 -0.42 0.11 16 35 H 0.05 0.25 6.90 -51.93 -0.36 -0.11 16 36 H 0.05 0.39 8.14 -51.93 -0.42 -0.04 16 37 H 0.40 2.67 8.44 -40.82 -0.34 2.33 16 38 H 0.06 0.89 8.14 -51.93 -0.42 0.47 16 39 H 0.06 0.78 8.14 -51.93 -0.42 0.36 16 40 H 0.06 1.10 8.14 -51.93 -0.42 0.68 16 41 H 0.06 1.27 8.14 -51.93 -0.42 0.84 16 42 H 0.38 10.22 7.80 -40.82 -0.32 9.90 16 43 H 0.26 7.53 8.31 -40.82 -0.34 7.19 16 44 H 0.07 1.10 8.14 -51.93 -0.42 0.68 16 45 H 0.06 1.01 8.14 -51.93 -0.42 0.59 16 46 H 0.06 0.66 8.14 -51.93 -0.42 0.24 16 47 H 0.07 0.71 8.14 -51.93 -0.42 0.28 16 48 H 0.08 0.36 8.14 -51.93 -0.42 -0.06 16 49 H 0.08 0.40 5.96 -51.93 -0.31 0.09 16 50 H 0.09 0.51 8.14 -51.93 -0.42 0.09 16 51 H 0.06 0.45 8.14 -51.93 -0.42 0.03 16 52 H 0.08 0.92 7.15 -51.93 -0.37 0.54 16 53 H 0.09 0.90 8.14 -51.93 -0.42 0.48 16 LS Contribution 415.18 15.07 6.26 6.26 Total: -1.00 -34.13 415.18 -9.91 -44.05 By element: Atomic # 1 Polarization: 17.25 SS G_CDS: -9.63 Total: 7.61 kcal Atomic # 6 Polarization: -4.15 SS G_CDS: -0.60 Total: -4.75 kcal Atomic # 7 Polarization: -53.67 SS G_CDS: 0.18 Total: -53.49 kcal Atomic # 8 Polarization: -16.05 SS G_CDS: -1.09 Total: -17.13 kcal Atomic # 14 Polarization: 22.48 SS G_CDS: -5.02 Total: 17.46 kcal Total LS contribution 6.26 Total: 6.26 kcal Total: -34.13 -9.91 -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. ZINC001714305198.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 -89.906 kcal (2) G-P(sol) polarization free energy of solvation -34.134 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -124.040 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.911 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.045 kcal (6) G-S(sol) free energy of system = (1) + (5) -133.951 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds