Wall clock time and date at job start Sat Apr 11 2020 06:09:48 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 1.52997 * 1 3 3 H 1.09002 * 109.48041 * 2 1 4 4 C 1.53274 * 109.45863 * 119.99389 * 2 1 3 5 5 C 1.53181 * 109.06503 * 177.54783 * 4 2 1 6 6 H 1.08998 * 109.54403 * 183.14482 * 5 4 2 7 7 C 1.50701 * 109.54128 * 62.97247 * 5 4 2 8 8 O 1.21285 * 119.99852 * 352.60572 * 7 5 4 9 9 N 1.34779 * 119.99986 * 172.60367 * 7 5 4 10 10 C 1.46924 * 120.63111 * 6.16551 * 9 7 5 11 11 C 1.53191 * 108.77912 * 233.58536 * 10 9 7 12 12 C 1.53039 * 109.31101 * 305.36715 * 11 10 9 13 13 N 1.46498 * 109.46322 * 181.38246 * 12 11 10 14 14 C 1.36941 * 119.99981 * 299.97610 * 13 12 11 15 15 H 1.08003 * 119.99717 * 42.65112 * 14 13 12 16 16 C 1.38801 * 119.99897 * 222.37914 * 14 13 12 17 17 N 1.31623 * 119.99908 * 207.96071 * 16 14 13 18 18 Si 1.86807 * 120.00140 * 27.95985 * 16 14 13 19 19 H 1.48496 * 109.47145 * 93.66119 * 18 16 14 20 20 H 1.48506 * 109.46914 * 213.65775 * 18 16 14 21 21 H 1.48500 * 109.46976 * 333.66082 * 18 16 14 22 22 C 1.46500 * 119.99951 * 119.96860 * 13 12 11 23 23 C 1.53005 * 109.47268 * 277.07717 * 22 13 12 24 24 O 1.42902 * 109.46585 * 62.01066 * 23 22 13 25 25 C 1.53044 * 109.52983 * 61.36752 * 12 11 10 26 26 C 1.46929 * 120.62901 * 186.14236 * 9 7 5 27 27 C 1.53174 * 109.11228 * 303.06231 * 5 4 2 28 28 C 1.53086 * 109.16377 * 57.02205 * 27 5 4 29 29 O 1.42905 * 109.41713 * 302.39121 * 28 27 5 30 30 H 1.09001 * 109.47284 * 180.02562 * 1 2 3 31 31 H 1.08997 * 109.47092 * 300.02060 * 1 2 3 32 32 H 1.09004 * 109.46920 * 60.01883 * 1 2 3 33 33 H 1.09000 * 109.50691 * 57.71728 * 4 2 1 34 34 H 1.09001 * 109.64261 * 297.46471 * 4 2 1 35 35 H 1.09005 * 109.58450 * 113.79895 * 10 9 7 36 36 H 1.09002 * 109.58593 * 353.37755 * 10 9 7 37 37 H 1.08988 * 109.49866 * 185.41432 * 11 10 9 38 38 H 1.09001 * 109.49431 * 65.31497 * 11 10 9 39 39 H 1.09004 * 109.46068 * 301.35686 * 12 11 10 40 40 H 0.97004 * 119.99866 * 179.97438 * 17 16 14 41 41 H 1.08991 * 109.47166 * 37.08144 * 22 13 12 42 42 H 1.09007 * 109.46772 * 157.08332 * 22 13 12 43 43 H 1.08996 * 109.46944 * 182.00934 * 23 22 13 44 44 H 1.08996 * 109.46865 * 302.01330 * 23 22 13 45 45 H 0.96697 * 113.99577 * 179.97438 * 24 23 22 46 46 H 1.09007 * 109.49675 * 58.57751 * 25 12 11 47 47 H 1.09000 * 109.50224 * 178.67413 * 25 12 11 48 48 H 1.09003 * 109.58529 * 246.19968 * 26 9 7 49 49 H 1.09005 * 109.58704 * 6.62799 * 26 9 7 50 50 H 1.09002 * 109.52238 * 176.93150 * 27 5 4 51 51 H 1.08999 * 109.51927 * 297.05173 * 27 5 4 52 52 H 1.08996 * 109.48371 * 62.37497 * 28 27 5 53 53 H 1.09007 * 109.48127 * 182.39932 * 28 27 5 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 1 1.8935 1.0276 0.0000 4 6 2.0406 -0.7225 1.2516 5 6 3.5711 -0.7711 1.2120 6 1 3.9405 -1.3320 2.0704 7 6 4.1212 0.6314 1.2517 8 8 3.3697 1.5800 1.1711 9 7 5.4481 0.8315 1.3770 10 6 6.3828 -0.3015 1.3405 11 6 7.2651 -0.2534 2.5918 12 6 7.9413 1.1165 2.6820 13 7 8.8117 1.1547 3.8598 14 6 8.2828 0.9643 5.1085 15 1 7.5481 0.1896 5.2713 16 6 8.6951 1.7631 6.1660 17 7 8.6582 1.2969 7.3963 18 14 9.3025 3.4999 5.8431 19 1 8.1741 4.4541 5.9889 20 1 10.3684 3.8411 6.8194 21 1 9.8481 3.5853 4.4646 22 6 10.2479 1.3964 3.7016 23 6 10.9505 0.0833 3.3507 24 8 10.4497 -0.4068 2.1052 25 6 6.8741 2.2069 2.8012 26 6 5.9875 2.1870 1.5521 27 6 4.0176 -1.4601 -0.0812 28 6 3.4307 -0.7092 -1.2792 29 8 2.0066 -0.6741 -1.1666 30 1 -0.3634 -1.0277 0.0005 31 1 -0.3633 0.5141 0.8898 32 1 -0.3633 0.5136 -0.8902 33 1 1.6444 -1.7377 1.2730 34 1 1.7162 -0.1851 2.1428 35 1 7.0075 -0.2313 0.4499 36 1 5.8229 -1.2366 1.3237 37 1 8.0260 -1.0314 2.5305 38 1 6.6499 -0.4145 3.4771 39 1 8.5364 1.2875 1.7849 40 1 8.9468 1.8551 8.1354 41 1 10.4088 2.1195 2.9022 42 1 10.6551 1.7885 4.6337 43 1 12.0235 0.2561 3.2681 44 1 10.7599 -0.6512 4.1332 45 1 10.8519 -1.2384 1.8195 46 1 6.2625 2.0225 3.6845 47 1 7.3566 3.1803 2.8891 48 1 6.5800 2.4601 0.6789 49 1 5.1668 2.8938 1.6751 50 1 5.1059 -1.4498 -0.1423 51 1 3.6623 -2.4905 -0.0862 52 1 3.8192 0.3091 -1.2958 53 1 3.7101 -1.2200 -2.2007 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 ZINC001098512186.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 06:09:48 Heat of formation + Delta-G solvation = -107.372475 kcal Electronic energy + Delta-G solvation = -32585.632394 eV Core-core repulsion = 28458.014115 eV Total energy + Delta-G solvation = -4127.618279 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.97 seconds Orbital eigenvalues (eV) -40.88794 -38.77119 -37.53209 -36.37191 -34.89270 -33.92225 -32.84248 -31.97171 -30.89768 -30.59173 -28.08908 -27.85868 -25.45227 -24.55654 -23.41806 -22.72292 -22.41562 -21.46818 -20.72596 -19.65119 -18.56911 -17.06874 -16.79764 -16.35138 -16.33672 -16.16116 -15.60324 -15.18205 -15.01715 -14.85133 -14.40852 -14.20025 -14.00351 -13.82927 -13.43718 -13.20280 -13.13586 -12.91803 -12.68062 -12.50313 -12.45647 -12.30207 -12.17623 -12.02499 -11.94573 -11.63392 -11.46529 -11.22705 -11.14935 -10.83135 -10.78747 -10.66619 -10.52139 -10.40499 -10.23209 -10.13943 -9.77591 -9.60614 -9.52349 -9.30711 -9.12047 -8.52175 -8.36725 -6.72122 -6.09392 -3.48197 2.72393 3.17486 3.31012 3.43992 3.47852 3.73998 4.42545 4.48542 4.54729 4.66246 4.79378 4.83743 4.91484 4.95034 5.13147 5.15492 5.22651 5.34002 5.37905 5.46390 5.50658 5.51846 5.57781 5.63161 5.64304 5.72966 5.76644 5.82204 5.85172 5.89512 5.92903 5.99837 6.00511 6.07592 6.10490 6.13193 6.19374 6.24689 6.34631 6.51688 6.62255 6.65076 6.73480 6.82809 7.10562 7.11874 7.23148 7.60877 8.01995 8.11989 8.31743 8.41162 8.99479 9.67961 10.15581 11.06487 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.017041 B = 0.003252 C = 0.002985 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1642.709512 B = 8608.038597 C = 9377.405133 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.141 4.141 2 C 0.071 3.929 3 H 0.092 0.908 4 C -0.126 4.126 5 C -0.113 4.113 6 H 0.101 0.899 7 C 0.519 3.481 8 O -0.547 6.547 9 N -0.601 5.601 10 C 0.102 3.898 11 C -0.135 4.135 12 C 0.190 3.810 13 N -0.592 5.592 14 C -0.269 4.269 15 H 0.073 0.927 16 C 0.044 3.956 17 N -0.890 5.890 18 Si 0.854 3.146 19 H -0.289 1.289 20 H -0.296 1.296 21 H -0.260 1.260 22 C 0.152 3.848 23 C 0.056 3.944 24 O -0.565 6.565 25 C -0.143 4.143 26 C 0.114 3.886 27 C -0.155 4.155 28 C 0.063 3.937 29 O -0.384 6.384 30 H 0.057 0.943 31 H 0.070 0.930 32 H 0.059 0.941 33 H 0.074 0.926 34 H 0.078 0.922 35 H 0.066 0.934 36 H 0.082 0.918 37 H 0.076 0.924 38 H 0.066 0.934 39 H 0.056 0.944 40 H 0.263 0.737 41 H 0.038 0.962 42 H 0.067 0.933 43 H 0.025 0.975 44 H 0.048 0.952 45 H 0.360 0.640 46 H 0.074 0.926 47 H 0.063 0.937 48 H 0.059 0.941 49 H 0.084 0.916 50 H 0.087 0.913 51 H 0.082 0.918 52 H 0.048 0.952 53 H 0.093 0.907 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -5.623 -6.148 -15.419 17.526 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 -0.199 4.199 2 C 0.014 3.986 3 H 0.110 0.890 4 C -0.164 4.164 5 C -0.134 4.134 6 H 0.119 0.881 7 C 0.307 3.693 8 O -0.426 6.426 9 N -0.334 5.334 10 C -0.021 4.021 11 C -0.174 4.174 12 C 0.083 3.917 13 N -0.313 5.313 14 C -0.397 4.397 15 H 0.091 0.909 16 C -0.158 4.158 17 N -0.530 5.530 18 Si 0.682 3.318 19 H -0.216 1.216 20 H -0.223 1.223 21 H -0.185 1.185 22 C 0.026 3.974 23 C -0.024 4.024 24 O -0.369 6.369 25 C -0.183 4.183 26 C -0.008 4.008 27 C -0.193 4.193 28 C -0.014 4.014 29 O -0.304 6.304 30 H 0.077 0.923 31 H 0.088 0.912 32 H 0.078 0.922 33 H 0.092 0.908 34 H 0.097 0.903 35 H 0.084 0.916 36 H 0.100 0.900 37 H 0.095 0.905 38 H 0.084 0.916 39 H 0.075 0.925 40 H 0.072 0.928 41 H 0.056 0.944 42 H 0.086 0.914 43 H 0.043 0.957 44 H 0.067 0.933 45 H 0.205 0.795 46 H 0.093 0.907 47 H 0.082 0.918 48 H 0.078 0.922 49 H 0.102 0.898 50 H 0.105 0.895 51 H 0.101 0.899 52 H 0.067 0.933 53 H 0.111 0.889 Dipole moment (debyes) X Y Z Total from point charges -6.457 -5.133 -15.333 17.411 hybrid contribution 1.163 0.524 0.525 1.380 sum -5.294 -4.609 -14.807 16.387 Atomic orbital electron populations 1.21737 0.93599 1.02255 1.02276 1.22518 0.94612 0.97486 0.84002 0.89040 1.22024 0.92922 1.01620 0.99816 1.21396 0.97423 0.94331 1.00251 0.88073 1.20519 0.81899 0.91107 0.75733 1.90583 1.57217 1.44044 1.50768 1.48147 1.05681 1.08579 1.70959 1.22074 0.91814 0.88463 0.99747 1.22260 0.98598 1.00658 0.95926 1.20204 0.90086 0.91398 0.90008 1.44017 1.00538 1.84028 1.02730 1.18580 1.24756 1.13201 0.83201 0.90942 1.25607 0.97706 0.97526 0.94927 1.69970 1.47796 1.35857 0.99392 0.87259 0.78061 0.88154 0.78344 1.21632 1.22308 1.18505 1.21283 0.85308 0.92251 0.98596 1.23055 0.95010 0.99316 0.85039 1.86534 1.67915 1.42638 1.39766 1.22389 0.98306 1.00635 0.96965 1.21676 0.97843 0.83017 0.98308 1.22422 1.02193 1.00584 0.94077 1.22493 0.81600 0.99527 0.97797 1.87864 1.20465 1.78361 1.43675 0.92350 0.91154 0.92164 0.90781 0.90299 0.91578 0.89956 0.90535 0.91569 0.92541 0.92756 0.94404 0.91438 0.95700 0.93335 0.79549 0.90694 0.91807 0.92220 0.89783 0.89470 0.89916 0.93335 0.88870 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 -0.14 -1.47 9.56 37.16 0.36 -1.12 16 2 C 0.07 0.89 2.98 -26.59 -0.08 0.81 16 3 H 0.09 1.37 5.55 -51.93 -0.29 1.09 16 4 C -0.13 -1.48 4.60 -26.50 -0.12 -1.60 16 5 C -0.11 -1.33 2.19 -91.59 -0.20 -1.54 16 6 H 0.10 1.13 7.59 -51.93 -0.39 0.74 16 7 C 0.52 7.71 5.78 -10.98 -0.06 7.64 16 8 O -0.55 -9.60 13.07 5.55 0.07 -9.52 16 9 N -0.60 -8.75 2.97 -172.76 -0.51 -9.27 16 10 C 0.10 1.31 5.13 -3.71 -0.02 1.29 16 11 C -0.13 -2.20 5.29 -26.61 -0.14 -2.34 16 12 C 0.19 3.51 1.83 -67.89 -0.12 3.38 16 13 N -0.59 -12.88 1.88 -165.61 -0.31 -13.19 16 14 C -0.27 -6.94 8.53 -15.06 -0.13 -7.07 16 15 H 0.07 2.07 7.12 -52.48 -0.37 1.69 16 16 C 0.04 1.20 5.08 -17.43 -0.09 1.11 16 17 N -0.89 -26.01 13.97 55.49 0.78 -25.23 16 18 Si 0.85 20.79 26.40 -169.99 -4.49 16.30 16 19 H -0.29 -7.28 7.11 56.52 0.40 -6.87 16 20 H -0.30 -7.31 7.11 56.52 0.40 -6.91 16 21 H -0.26 -5.95 5.60 56.52 0.32 -5.64 16 22 C 0.15 3.08 4.15 -4.04 -0.02 3.07 16 23 C 0.06 0.95 7.41 37.16 0.28 1.23 16 24 O -0.57 -8.58 11.66 -35.23 -0.41 -8.99 16 25 C -0.14 -2.63 5.30 -26.61 -0.14 -2.77 16 26 C 0.11 1.79 6.41 -3.71 -0.02 1.76 16 27 C -0.16 -1.52 5.18 -26.60 -0.14 -1.66 16 28 C 0.06 0.69 6.62 37.20 0.25 0.93 16 29 O -0.38 -4.95 10.41 -35.23 -0.37 -5.31 16 30 H 0.06 0.56 8.14 -51.93 -0.42 0.13 16 31 H 0.07 0.67 8.14 -51.93 -0.42 0.24 16 32 H 0.06 0.60 8.14 -51.93 -0.42 0.18 16 33 H 0.07 0.76 8.14 -51.93 -0.42 0.34 16 34 H 0.08 0.97 8.12 -51.93 -0.42 0.55 16 35 H 0.07 0.77 8.14 -51.93 -0.42 0.35 16 36 H 0.08 0.88 4.45 -51.93 -0.23 0.65 16 37 H 0.08 1.26 7.37 -51.94 -0.38 0.88 16 38 H 0.07 1.25 7.11 -51.93 -0.37 0.88 16 39 H 0.06 1.03 7.48 -51.93 -0.39 0.64 16 40 H 0.26 7.33 8.31 -40.82 -0.34 6.99 16 41 H 0.04 0.74 7.95 -51.93 -0.41 0.33 16 42 H 0.07 1.48 4.92 -51.92 -0.26 1.22 16 43 H 0.02 0.37 8.14 -51.93 -0.42 -0.05 16 44 H 0.05 0.90 8.14 -51.93 -0.42 0.48 16 45 H 0.36 3.78 9.12 45.56 0.42 4.20 16 46 H 0.07 1.59 7.71 -51.93 -0.40 1.19 16 47 H 0.06 1.21 8.14 -51.93 -0.42 0.79 16 48 H 0.06 0.84 8.14 -51.93 -0.42 0.42 16 49 H 0.08 1.39 7.05 -51.93 -0.37 1.02 16 50 H 0.09 0.77 5.30 -51.93 -0.28 0.49 16 51 H 0.08 0.72 8.14 -51.93 -0.42 0.29 16 52 H 0.05 0.60 7.38 -51.93 -0.38 0.22 16 53 H 0.09 0.82 8.14 -51.93 -0.42 0.40 16 LS Contribution 388.29 15.07 5.85 5.85 Total: -1.00 -31.10 388.29 -8.20 -39.30 By element: Atomic # 1 Polarization: 15.34 SS G_CDS: -8.40 Total: 6.94 kcal Atomic # 6 Polarization: 3.54 SS G_CDS: -0.41 Total: 3.13 kcal Atomic # 7 Polarization: -47.64 SS G_CDS: -0.05 Total: -47.69 kcal Atomic # 8 Polarization: -23.13 SS G_CDS: -0.70 Total: -23.83 kcal Atomic # 14 Polarization: 20.79 SS G_CDS: -4.49 Total: 16.30 kcal Total LS contribution 5.85 Total: 5.85 kcal Total: -31.10 -8.20 -39.30 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. ZINC001098512186.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 -68.077 kcal (2) G-P(sol) polarization free energy of solvation -31.099 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -99.176 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.197 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.296 kcal (6) G-S(sol) free energy of system = (1) + (5) -107.372 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.97 seconds