Wall clock time and date at job start Sat Apr 11 2020 06:11:56 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 C 1.53000 * 109.47278 * 2 1 4 4 C 1.52995 * 109.46899 * 239.99545 * 2 1 3 5 5 C 1.53004 * 109.46901 * 120.00074 * 2 1 3 6 6 H 1.09000 * 109.47008 * 302.75253 * 5 2 1 7 7 N 1.46500 * 109.46987 * 62.75056 * 5 2 1 8 8 C 1.34775 * 120.00371 * 274.99708 * 7 5 2 9 9 N 1.34780 * 119.99807 * 179.72683 * 8 7 5 10 10 O 1.21586 * 119.99671 * 0.02562 * 8 7 5 11 11 C 1.50693 * 109.47163 * 182.75670 * 5 2 1 12 12 O 1.21284 * 119.99834 * 265.65942 * 11 5 2 13 13 N 1.34778 * 120.00561 * 85.65416 * 11 5 2 14 14 C 1.46498 * 120.00423 * 184.61014 * 13 11 5 15 15 C 1.53000 * 109.47037 * 185.03628 * 14 13 11 16 16 H 1.08996 * 109.58415 * 305.73769 * 15 14 13 17 17 C 1.53194 * 109.58811 * 66.02591 * 15 14 13 18 18 C 1.53042 * 109.31422 * 174.42114 * 17 15 14 19 19 C 1.53041 * 109.53264 * 298.63450 * 18 17 15 20 20 C 1.53192 * 109.31673 * 61.36769 * 19 18 17 21 21 N 1.46926 * 109.58230 * 185.45617 * 15 14 13 22 22 C 1.36930 * 120.63734 * 6.60401 * 21 15 14 23 23 H 1.08006 * 119.99480 * 330.34564 * 22 21 15 24 24 C 1.38808 * 120.00790 * 150.33873 * 22 21 15 25 25 N 1.31628 * 119.99567 * 345.73714 * 24 22 21 26 26 Si 1.86796 * 120.00528 * 165.73481 * 24 22 21 27 27 H 1.48503 * 109.46899 * 5.00977 * 26 24 22 28 28 H 1.48502 * 109.46987 * 125.01077 * 26 24 22 29 29 H 1.48500 * 109.47090 * 245.00921 * 26 24 22 30 30 H 1.09002 * 109.46898 * 300.00308 * 1 2 3 31 31 H 1.09004 * 109.46759 * 59.99572 * 1 2 3 32 32 H 1.08996 * 109.47660 * 180.02562 * 1 2 3 33 33 H 1.09002 * 109.47059 * 184.67812 * 3 2 1 34 34 H 1.08996 * 109.46911 * 304.67614 * 3 2 1 35 35 H 1.08999 * 109.47207 * 64.67824 * 3 2 1 36 36 H 1.09001 * 109.47724 * 294.39662 * 4 2 1 37 37 H 1.09007 * 109.46850 * 54.39943 * 4 2 1 38 38 H 1.09003 * 109.47066 * 174.39556 * 4 2 1 39 39 H 0.97004 * 119.99494 * 95.00209 * 7 5 2 40 40 H 0.96998 * 119.99525 * 180.28028 * 9 8 7 41 41 H 0.96994 * 119.99966 * 0.27750 * 9 8 7 42 42 H 0.96999 * 119.99621 * 4.61172 * 13 11 5 43 43 H 1.09001 * 109.47027 * 305.03597 * 14 13 11 44 44 H 1.08999 * 109.47324 * 65.03353 * 14 13 11 45 45 H 1.09004 * 109.49310 * 294.37748 * 17 15 14 46 46 H 1.09000 * 109.49767 * 54.43243 * 17 15 14 47 47 H 1.08999 * 109.45805 * 58.65306 * 18 17 15 48 48 H 1.08998 * 109.45911 * 178.62816 * 18 17 15 49 49 H 1.09001 * 109.48905 * 181.31821 * 19 18 17 50 50 H 1.09003 * 109.49773 * 301.40900 * 19 18 17 51 51 H 1.08995 * 109.58528 * 65.14951 * 20 19 18 52 52 H 1.08997 * 109.58415 * 185.43260 * 20 19 18 53 53 H 0.97002 * 119.99649 * 179.97438 * 25 24 22 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 2.0401 1.4425 0.0000 4 6 2.0400 -0.7213 -1.2492 5 6 2.0400 -0.7213 1.2493 6 1 1.6369 -0.2367 2.1386 7 7 1.6065 -2.1203 1.2165 8 6 0.3859 -2.4586 1.6772 9 7 -0.0149 -3.7449 1.6419 10 8 -0.3556 -1.6026 2.1195 11 6 3.5454 -0.6624 1.2840 12 8 4.1987 -1.5772 0.8285 13 7 4.1659 0.4067 1.8210 14 6 5.6260 0.5112 1.7644 15 6 6.0799 1.7440 2.5487 16 1 5.5572 2.6257 2.1780 17 6 5.7685 1.5498 4.0360 18 6 6.3485 2.7213 4.8318 19 6 7.8685 2.7560 4.6570 20 6 8.2037 2.9640 3.1768 21 7 7.5288 1.9254 2.3857 22 6 8.2370 1.1396 1.5164 23 1 7.9101 0.1308 1.3114 24 6 9.3750 1.6393 0.8983 25 7 9.6207 2.9323 0.9183 26 14 10.5578 0.4771 0.0384 27 1 9.9982 -0.8984 0.0527 28 1 10.7516 0.9181 -1.3663 29 1 11.8637 0.4876 0.7452 30 1 -0.3633 0.5139 0.8900 31 1 -0.3633 0.5139 -0.8900 32 1 -0.3634 -1.0276 0.0005 33 1 3.1269 1.4436 -0.0838 34 1 1.6100 1.9799 -0.8451 35 1 1.7468 1.9316 0.9289 36 1 1.7609 -1.7739 -1.2004 37 1 1.5970 -0.2687 -2.1364 38 1 3.1254 -0.6353 -1.3008 39 1 2.1981 -2.8032 0.8634 40 1 -0.8949 -3.9878 1.9697 41 1 0.5766 -4.4277 1.2888 42 1 3.6456 1.1070 2.2451 43 1 6.0715 -0.3822 2.2020 44 1 5.9437 0.6041 0.7258 45 1 4.6887 1.5114 4.1796 46 1 6.2148 0.6176 4.3825 47 1 5.9196 3.6550 4.4680 48 1 6.1072 2.5979 5.8876 49 1 8.2832 3.5764 5.2428 50 1 8.2955 1.8128 4.9978 51 1 7.8562 3.9467 2.8580 52 1 9.2818 2.8932 3.0329 53 1 10.4161 3.2815 0.4867 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 ZINC001713256407.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 06:11:56 Heat of formation + Delta-G solvation = -61.406656 kcal Electronic energy + Delta-G solvation = -32080.203661 eV Core-core repulsion = 27986.871361 eV Total energy + Delta-G solvation = -4093.332300 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.86 seconds Orbital eigenvalues (eV) -40.95600 -39.33312 -37.89287 -36.77402 -34.65006 -34.07167 -33.12555 -33.05846 -31.06282 -29.83838 -27.88392 -27.28526 -26.96067 -25.54244 -24.78983 -22.16482 -21.44778 -20.97382 -20.54816 -19.22193 -19.01292 -18.69948 -17.75165 -16.61142 -16.29332 -16.18805 -15.69167 -15.23343 -14.92452 -14.68211 -14.31929 -14.14860 -14.00096 -13.86125 -13.59600 -13.40361 -13.19156 -12.99903 -12.76935 -12.53788 -12.33574 -12.22148 -12.06465 -11.74171 -11.62483 -11.37696 -11.14377 -10.95080 -10.94229 -10.83920 -10.72493 -10.56477 -10.41292 -10.27946 -10.14592 -9.99282 -9.84471 -9.77232 -9.51335 -9.34044 -9.09902 -8.71139 -8.49451 -6.68375 -5.81834 -3.27857 2.49884 2.75690 3.02752 3.36361 3.43805 3.45153 3.48444 4.28336 4.46431 4.60764 4.64419 4.78408 5.01558 5.23827 5.26261 5.33752 5.40624 5.49284 5.59761 5.61254 5.65310 5.68448 5.79751 5.86999 5.90612 5.92169 5.95395 6.02790 6.11984 6.13652 6.22591 6.30059 6.33381 6.34129 6.37903 6.48797 6.53075 6.57921 6.66953 6.70552 6.73849 6.76229 6.89162 6.99260 7.38189 7.65099 7.65895 7.77337 7.78667 8.31823 8.41767 8.43809 9.17274 9.79540 10.35984 11.26017 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.013560 B = 0.003133 C = 0.002879 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2064.469882 B = 8935.779198 C = 9724.639345 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.127 4.127 2 C -0.071 4.071 3 C -0.152 4.152 4 C -0.141 4.141 5 C 0.156 3.844 6 H 0.106 0.894 7 N -0.725 5.725 8 C 0.709 3.291 9 N -0.869 5.869 10 O -0.591 6.591 11 C 0.512 3.488 12 O -0.538 6.538 13 N -0.716 5.716 14 C 0.127 3.873 15 C 0.167 3.833 16 H 0.030 0.970 17 C -0.131 4.131 18 C -0.109 4.109 19 C -0.144 4.144 20 C 0.174 3.826 21 N -0.584 5.584 22 C -0.257 4.257 23 H 0.070 0.930 24 C 0.007 3.993 25 N -0.901 5.901 26 Si 0.900 3.100 27 H -0.276 1.276 28 H -0.290 1.290 29 H -0.289 1.289 30 H 0.063 0.937 31 H 0.048 0.952 32 H 0.056 0.944 33 H 0.067 0.933 34 H 0.063 0.937 35 H 0.059 0.941 36 H 0.055 0.945 37 H 0.055 0.945 38 H 0.061 0.939 39 H 0.406 0.594 40 H 0.414 0.586 41 H 0.397 0.603 42 H 0.397 0.603 43 H 0.071 0.929 44 H 0.081 0.919 45 H 0.047 0.953 46 H 0.059 0.941 47 H 0.053 0.947 48 H 0.043 0.957 49 H 0.047 0.953 50 H 0.053 0.947 51 H 0.018 0.982 52 H 0.087 0.913 53 H 0.253 0.747 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -17.560 -7.148 1.555 19.023 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 -0.184 4.184 2 C -0.073 4.073 3 C -0.210 4.210 4 C -0.198 4.198 5 C 0.047 3.953 6 H 0.124 0.876 7 N -0.382 5.382 8 C 0.407 3.593 9 N -0.437 5.437 10 O -0.469 6.469 11 C 0.297 3.703 12 O -0.415 6.415 13 N -0.368 5.368 14 C 0.004 3.996 15 C 0.059 3.941 16 H 0.047 0.953 17 C -0.170 4.170 18 C -0.147 4.147 19 C -0.184 4.184 20 C 0.049 3.951 21 N -0.308 5.308 22 C -0.387 4.387 23 H 0.088 0.912 24 C -0.192 4.192 25 N -0.544 5.544 26 Si 0.729 3.271 27 H -0.201 1.201 28 H -0.217 1.217 29 H -0.215 1.215 30 H 0.082 0.918 31 H 0.067 0.933 32 H 0.075 0.925 33 H 0.086 0.914 34 H 0.082 0.918 35 H 0.078 0.922 36 H 0.074 0.926 37 H 0.074 0.926 38 H 0.080 0.920 39 H 0.243 0.757 40 H 0.246 0.754 41 H 0.225 0.775 42 H 0.232 0.768 43 H 0.089 0.911 44 H 0.099 0.901 45 H 0.065 0.935 46 H 0.078 0.922 47 H 0.071 0.929 48 H 0.062 0.938 49 H 0.066 0.934 50 H 0.072 0.928 51 H 0.036 0.964 52 H 0.106 0.894 53 H 0.063 0.937 Dipole moment (debyes) X Y Z Total from point charges -17.400 -6.868 1.471 18.764 hybrid contribution 0.687 -0.926 -0.412 1.224 sum -16.713 -7.794 1.059 18.472 Atomic orbital electron populations 1.21862 0.92846 1.02269 1.01463 1.20866 0.96913 0.95522 0.93995 1.22032 1.02143 0.94375 1.02453 1.21866 1.01672 1.00052 0.96258 1.20746 0.91426 0.82551 1.00613 0.87616 1.44780 1.16644 1.09234 1.67578 1.15825 0.81898 0.83121 0.78474 1.42965 1.22068 1.07447 1.71177 1.90976 1.54436 1.48493 1.52965 1.20331 0.89323 0.82576 0.78117 1.90697 1.67038 1.36887 1.46838 1.46139 1.09283 1.22897 1.58448 1.21648 0.76362 0.99296 1.02277 1.20529 0.87827 0.94007 0.91719 0.95252 1.22081 0.98373 0.98767 0.97772 1.21382 0.97063 0.98120 0.98086 1.22198 0.94863 1.00358 1.00937 1.20785 0.99276 0.89940 0.85138 1.43951 0.99848 1.40859 1.46106 1.19211 1.06979 0.93856 1.18645 0.91213 1.25086 1.00614 0.95334 0.98132 1.70027 1.27305 1.10601 1.46514 0.86260 0.81197 0.80630 0.78969 1.20074 1.21690 1.21549 0.91835 0.93320 0.92511 0.91442 0.91797 0.92180 0.92632 0.92571 0.91969 0.75742 0.75393 0.77505 0.76829 0.91091 0.90117 0.93484 0.92234 0.92866 0.93810 0.93445 0.92817 0.96409 0.89438 0.93664 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. 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 -0.13 -1.39 7.03 37.16 0.26 -1.13 16 2 C -0.07 -0.78 0.62 -154.51 -0.10 -0.87 16 3 C -0.15 -1.61 7.57 37.16 0.28 -1.33 16 4 C -0.14 -1.60 7.99 37.16 0.30 -1.30 16 5 C 0.16 1.84 1.94 -69.08 -0.13 1.71 16 6 H 0.11 1.26 7.58 -51.93 -0.39 0.86 16 7 N -0.73 -7.76 4.02 -59.81 -0.24 -8.00 16 8 C 0.71 7.68 7.31 -86.92 -0.63 7.05 16 9 N -0.87 -5.83 8.88 27.63 0.25 -5.59 16 10 O -0.59 -8.32 14.30 5.29 0.08 -8.25 16 11 C 0.51 7.30 5.38 -10.99 -0.06 7.24 16 12 O -0.54 -9.32 15.51 5.55 0.09 -9.24 16 13 N -0.72 -10.08 4.07 -60.30 -0.25 -10.33 16 14 C 0.13 2.30 3.85 -4.04 -0.02 2.29 16 15 C 0.17 3.17 2.97 -67.60 -0.20 2.97 16 16 H 0.03 0.57 8.14 -51.93 -0.42 0.15 16 17 C -0.13 -2.15 5.19 -26.61 -0.14 -2.28 16 18 C -0.11 -1.77 5.88 -26.69 -0.16 -1.93 16 19 C -0.14 -2.69 6.08 -26.61 -0.16 -2.85 16 20 C 0.17 4.00 5.27 -3.69 -0.02 3.98 16 21 N -0.58 -13.75 3.00 -164.75 -0.49 -14.24 16 22 C -0.26 -6.72 8.50 -15.06 -0.13 -6.85 16 23 H 0.07 1.82 6.30 -52.48 -0.33 1.49 16 24 C 0.01 0.20 4.97 -17.43 -0.09 0.11 16 25 N -0.90 -25.37 11.15 55.49 0.62 -24.75 16 26 Si 0.90 21.48 29.58 -169.99 -5.03 16.45 16 27 H -0.28 -6.51 7.11 56.52 0.40 -6.11 16 28 H -0.29 -7.01 7.11 56.52 0.40 -6.61 16 29 H -0.29 -6.91 7.11 56.52 0.40 -6.51 16 30 H 0.06 0.75 7.71 -51.93 -0.40 0.35 16 31 H 0.05 0.48 8.14 -51.93 -0.42 0.06 16 32 H 0.06 0.67 5.70 -51.93 -0.30 0.37 16 33 H 0.07 0.82 6.65 -51.93 -0.35 0.47 16 34 H 0.06 0.63 8.14 -51.93 -0.42 0.20 16 35 H 0.06 0.56 8.14 -51.93 -0.42 0.14 16 36 H 0.05 0.60 7.32 -51.93 -0.38 0.22 16 37 H 0.06 0.58 8.14 -51.92 -0.42 0.15 16 38 H 0.06 0.83 7.21 -51.93 -0.37 0.45 16 39 H 0.41 4.13 7.77 -40.82 -0.32 3.81 16 40 H 0.41 2.26 8.93 -40.82 -0.36 1.90 16 41 H 0.40 1.71 8.84 -40.82 -0.36 1.35 16 42 H 0.40 4.67 7.64 -40.82 -0.31 4.36 16 43 H 0.07 1.42 7.71 -51.93 -0.40 1.02 16 44 H 0.08 1.69 7.29 -51.93 -0.38 1.31 16 45 H 0.05 0.65 7.53 -51.93 -0.39 0.26 16 46 H 0.06 1.05 8.14 -51.93 -0.42 0.63 16 47 H 0.05 0.85 8.14 -51.93 -0.42 0.43 16 48 H 0.04 0.63 8.14 -51.93 -0.42 0.21 16 49 H 0.05 0.80 8.14 -51.93 -0.42 0.38 16 50 H 0.05 1.03 8.14 -51.93 -0.42 0.61 16 51 H 0.02 0.43 8.14 -51.93 -0.42 0.01 16 52 H 0.09 2.27 6.11 -51.93 -0.32 1.95 16 53 H 0.25 6.93 8.31 -40.82 -0.34 6.60 16 LS Contribution 400.53 15.07 6.04 6.04 Total: -1.00 -31.52 400.53 -9.08 -40.60 By element: Atomic # 1 Polarization: 19.64 SS G_CDS: -9.15 Total: 10.49 kcal Atomic # 6 Polarization: 7.80 SS G_CDS: -0.99 Total: 6.81 kcal Atomic # 7 Polarization: -62.79 SS G_CDS: -0.11 Total: -62.90 kcal Atomic # 8 Polarization: -17.65 SS G_CDS: 0.16 Total: -17.48 kcal Atomic # 14 Polarization: 21.48 SS G_CDS: -5.03 Total: 16.45 kcal Total LS contribution 6.04 Total: 6.04 kcal Total: -31.52 -9.08 -40.60 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. ZINC001713256407.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 -20.807 kcal (2) G-P(sol) polarization free energy of solvation -31.517 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -52.324 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.083 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.600 kcal (6) G-S(sol) free energy of system = (1) + (5) -61.407 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.86 seconds