Wall clock time and date at job start Wed Apr 1 2020 03:54:57 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 N 2 2 C 1.31514 * 1 3 3 Si 1.86794 * 120.00464 * 2 1 4 4 H 1.48501 * 109.47188 * 269.99860 * 3 2 1 5 5 H 1.48501 * 109.47085 * 29.99439 * 3 2 1 6 6 H 1.48498 * 109.47634 * 149.99675 * 3 2 1 7 7 C 1.37884 * 119.99698 * 179.97438 * 2 1 3 8 8 H 1.08002 * 119.99697 * 179.97438 * 7 2 1 9 9 C 1.50702 * 119.99942 * 0.28408 * 7 2 1 10 10 O 1.42899 * 110.63787 * 300.42070 * 9 7 2 11 11 C 1.55153 * 110.72079 * 177.27948 * 9 7 2 12 12 C 1.54905 * 101.58432 * 206.13591 * 11 9 7 13 13 N 1.47419 * 104.83258 * 37.00633 * 12 11 9 14 14 C 1.34776 * 125.65218 * 155.83904 * 13 12 11 15 15 O 1.21583 * 120.00688 * 180.02562 * 14 13 12 16 16 N 1.34785 * 119.99769 * 0.02641 * 14 13 12 17 17 C 1.46497 * 120.00212 * 180.02562 * 16 14 13 18 18 C 1.52995 * 109.47245 * 179.97438 * 17 16 14 19 19 C 1.52997 * 109.47404 * 180.02562 * 18 17 16 20 20 C 1.52995 * 109.47087 * 180.02562 * 19 18 17 21 21 C 1.53009 * 109.46848 * 179.97438 * 20 19 18 22 22 C 1.50699 * 109.47062 * 179.97438 * 21 20 19 23 23 C 1.38240 * 120.00381 * 269.72878 * 22 21 20 24 24 C 1.38231 * 120.00251 * 179.76284 * 23 22 21 25 25 C 1.38243 * 119.99846 * 0.48879 * 24 23 22 26 26 C 1.38234 * 120.00016 * 359.78767 * 25 24 23 27 27 C 1.38231 * 120.00096 * 89.99912 * 22 21 20 28 28 C 1.47319 * 108.73704 * 335.71934 * 13 12 11 29 29 H 0.97005 * 119.99651 * 0.02562 * 1 2 3 30 30 H 0.96699 * 114.00083 * 59.29892 * 10 9 7 31 31 H 1.09004 * 111.00253 * 324.20924 * 11 9 7 32 32 H 1.09005 * 111.00483 * 88.05560 * 11 9 7 33 33 H 1.08994 * 110.37244 * 155.84858 * 12 11 9 34 34 H 1.09008 * 110.36329 * 278.17306 * 12 11 9 35 35 H 0.97000 * 119.99653 * 0.02562 * 16 14 13 36 36 H 1.08993 * 109.46915 * 300.00013 * 17 16 14 37 37 H 1.09003 * 109.46810 * 59.99959 * 17 16 14 38 38 H 1.09003 * 109.47226 * 300.00509 * 18 17 16 39 39 H 1.09008 * 109.47150 * 59.99559 * 18 17 16 40 40 H 1.09003 * 109.46821 * 300.00134 * 19 18 17 41 41 H 1.09000 * 109.47087 * 59.99599 * 19 18 17 42 42 H 1.09003 * 109.47227 * 299.99675 * 20 19 18 43 43 H 1.09003 * 109.47461 * 60.00218 * 20 19 18 44 44 H 1.08993 * 109.46987 * 299.99944 * 21 20 19 45 45 H 1.08999 * 109.47132 * 60.00304 * 21 20 19 46 46 H 1.08004 * 119.99262 * 359.97438 * 23 22 21 47 47 H 1.08002 * 120.00189 * 180.24688 * 24 23 22 48 48 H 1.07997 * 119.99596 * 179.76733 * 25 24 23 49 49 H 1.07998 * 120.00038 * 179.97438 * 26 25 24 50 50 H 1.08009 * 120.00140 * 0.02562 * 27 22 21 51 51 H 1.09004 * 110.06766 * 241.86643 * 28 13 12 52 52 H 1.08999 * 109.85130 * 120.60999 * 28 13 12 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 7 0.0000 0.0000 0.0000 2 6 1.3151 0.0000 0.0000 3 14 2.2492 1.6176 0.0000 4 1 2.4968 2.0463 -1.4001 5 1 1.4467 2.6526 0.6999 6 1 3.5468 1.4401 0.7001 7 6 2.0045 -1.1941 0.0005 8 1 3.0845 -1.1941 0.0001 9 6 1.2509 -2.4992 -0.0054 10 8 0.4077 -2.5991 1.1440 11 6 2.2320 -3.6993 -0.0725 12 6 1.3499 -4.7854 -0.7371 13 7 0.5316 -4.0559 -1.7227 14 6 -0.0304 -4.5890 -2.8257 15 8 -0.6878 -3.8895 -3.5718 16 7 0.1365 -5.8977 -3.1016 17 6 -0.4738 -6.4771 -4.3008 18 6 -0.1326 -7.9666 -4.3778 19 6 -0.7695 -8.5716 -5.6305 20 6 -0.4288 -10.0612 -5.7071 21 6 -1.0662 -10.6663 -6.9596 22 6 -0.7301 -12.1334 -7.0354 23 6 0.4076 -12.5483 -7.7020 24 6 0.7185 -13.8937 -7.7674 25 6 -0.1138 -14.8250 -7.1748 26 6 -1.2545 -14.4105 -6.5131 27 6 -1.5625 -13.0647 -6.4432 28 6 0.4269 -2.6481 -1.3017 29 1 -0.4850 0.8401 -0.0004 30 1 -0.2492 -1.8928 1.2125 31 1 3.0959 -3.4634 -0.6939 32 1 2.5432 -4.0059 0.9262 33 1 1.9731 -5.5273 -1.2362 34 1 0.7117 -5.2632 0.0064 35 1 0.6607 -6.4559 -2.5062 36 1 -1.5557 -6.3539 -4.2535 37 1 -0.0887 -5.9703 -5.1856 38 1 0.9494 -8.0895 -4.4252 39 1 -0.5174 -8.4738 -3.4929 40 1 -1.8515 -8.4487 -5.5834 41 1 -0.3843 -8.0644 -6.5150 42 1 0.6532 -10.1845 -5.7539 43 1 -0.8143 -10.5681 -4.8225 44 1 -2.1481 -10.5430 -6.9123 45 1 -0.6810 -10.1595 -7.8444 46 1 1.0554 -11.8210 -8.1688 47 1 1.6095 -14.2175 -8.2848 48 1 0.1272 -15.8763 -7.2292 49 1 -1.9049 -15.1381 -6.0506 50 1 -2.4540 -12.7409 -5.9265 51 1 -0.6150 -2.3914 -1.1102 52 1 0.8344 -1.9987 -2.0765 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 ZINC000591947708.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 03:54:57 Heat of formation + Delta-G solvation = -78.410447 kcal Electronic energy + Delta-G solvation = -28870.730173 eV Core-core repulsion = 24833.909171 eV Total energy + Delta-G solvation = -4036.821001 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 346.204 amu Computer time = 1.07 seconds Orbital eigenvalues (eV) -39.71446 -39.60634 -37.55424 -36.52111 -34.59068 -34.23619 -32.43430 -32.17992 -31.25805 -30.18543 -29.22930 -27.76290 -26.11808 -24.75749 -22.97289 -22.94611 -22.24827 -21.44248 -21.07823 -19.64192 -19.32423 -17.51853 -17.13314 -17.02543 -16.31373 -15.86105 -15.58679 -15.50842 -15.11878 -14.89919 -14.44306 -14.23725 -14.04629 -13.78448 -13.74538 -13.67370 -13.21049 -12.89868 -12.85965 -12.76325 -12.39966 -12.29260 -12.09847 -11.72634 -11.59866 -11.53650 -11.40147 -11.39351 -11.13310 -11.04317 -10.94748 -10.80058 -10.77856 -10.64101 -10.49072 -10.15317 -9.59155 -9.31201 -9.29785 -9.04490 -8.80267 -8.65944 -8.29898 -7.73722 -6.27025 -4.35482 0.98235 1.02402 3.14381 3.23206 3.30045 3.32757 3.40803 3.77386 4.26326 4.29640 4.43196 4.47171 4.61933 4.66076 4.71350 4.76731 4.81601 4.91985 5.00857 5.13833 5.17637 5.21647 5.31148 5.39212 5.39699 5.50647 5.53166 5.65504 5.67177 5.70456 5.73101 5.78577 5.79981 5.93106 6.02843 6.06714 6.07431 6.09763 6.14485 6.16003 6.28176 6.52270 6.63828 6.73888 6.80291 6.90373 7.00660 7.27961 7.34299 7.66165 7.75209 8.04549 8.55584 8.68358 9.15744 9.32267 9.41960 10.80894 Molecular weight = 346.20amu Principal moments of inertia in cm(-1) A = 0.029424 B = 0.001384 C = 0.001371 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 951.377075 B =20225.011606 C =20422.720885 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 N -0.894 5.894 2 C 0.071 3.929 3 Si 0.904 3.096 4 H -0.278 1.278 5 H -0.284 1.284 6 H -0.272 1.272 7 C -0.538 4.538 8 H 0.066 0.934 9 C 0.247 3.753 10 O -0.586 6.586 11 C -0.116 4.116 12 C 0.104 3.896 13 N -0.631 5.631 14 C 0.714 3.286 15 O -0.598 6.598 16 N -0.754 5.754 17 C 0.140 3.860 18 C -0.130 4.130 19 C -0.116 4.116 20 C -0.112 4.112 21 C -0.084 4.084 22 C -0.079 4.079 23 C -0.119 4.119 24 C -0.119 4.119 25 C -0.128 4.128 26 C -0.119 4.119 27 C -0.119 4.119 28 C 0.123 3.877 29 H 0.270 0.730 30 H 0.384 0.616 31 H 0.076 0.924 32 H 0.076 0.924 33 H 0.055 0.945 34 H 0.061 0.939 35 H 0.392 0.608 36 H 0.062 0.938 37 H 0.062 0.938 38 H 0.068 0.932 39 H 0.068 0.932 40 H 0.067 0.933 41 H 0.067 0.933 42 H 0.064 0.936 43 H 0.064 0.936 44 H 0.073 0.927 45 H 0.073 0.927 46 H 0.121 0.879 47 H 0.120 0.880 48 H 0.119 0.881 49 H 0.120 0.880 50 H 0.121 0.879 51 H 0.062 0.938 52 H 0.063 0.937 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -0.376 -26.542 -12.338 29.272 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 N -0.533 5.533 2 C -0.133 4.133 3 Si 0.731 3.269 4 H -0.204 1.204 5 H -0.210 1.210 6 H -0.197 1.197 7 C -0.576 4.576 8 H 0.085 0.915 9 C 0.207 3.793 10 O -0.395 6.395 11 C -0.154 4.154 12 C -0.020 4.020 13 N -0.369 5.369 14 C 0.416 3.584 15 O -0.477 6.477 16 N -0.411 5.411 17 C 0.015 3.985 18 C -0.168 4.168 19 C -0.154 4.154 20 C -0.149 4.149 21 C -0.121 4.121 22 C -0.079 4.079 23 C -0.137 4.137 24 C -0.137 4.137 25 C -0.146 4.146 26 C -0.137 4.137 27 C -0.137 4.137 28 C 0.001 3.999 29 H 0.080 0.920 30 H 0.235 0.765 31 H 0.094 0.906 32 H 0.094 0.906 33 H 0.073 0.927 34 H 0.079 0.921 35 H 0.226 0.774 36 H 0.080 0.920 37 H 0.080 0.920 38 H 0.086 0.914 39 H 0.087 0.913 40 H 0.085 0.915 41 H 0.085 0.915 42 H 0.083 0.917 43 H 0.083 0.917 44 H 0.092 0.908 45 H 0.091 0.909 46 H 0.139 0.861 47 H 0.138 0.862 48 H 0.137 0.863 49 H 0.138 0.862 50 H 0.139 0.861 51 H 0.081 0.919 52 H 0.082 0.918 Dipole moment (debyes) X Y Z Total from point charges -0.710 -26.427 -12.847 29.393 hybrid contribution 0.318 1.047 0.109 1.099 sum -0.392 -25.381 -12.738 28.401 Atomic orbital electron populations 1.69650 1.06004 1.27940 1.49731 1.25075 0.95047 0.99765 0.93376 0.86399 0.79783 0.82421 0.78287 1.20420 1.20979 1.19700 1.21515 0.93674 0.90127 1.52314 0.91537 1.19502 0.86240 0.92040 0.81546 1.86084 1.51713 1.54873 1.46825 1.22722 0.97523 0.95047 1.00087 1.22222 0.93281 0.95302 0.91151 1.48042 1.53256 1.12797 1.22780 1.15539 0.80201 0.81520 0.81145 1.90880 1.45817 1.60524 1.50497 1.45150 1.58668 1.08920 1.28366 1.21102 0.98045 0.91993 0.87324 1.21794 1.01437 0.94724 0.98875 1.21509 1.01183 0.94965 0.97787 1.21564 1.00916 0.95131 0.97315 1.20663 1.01433 0.90907 0.99079 1.19966 0.94924 0.95753 0.97236 1.21092 0.96971 0.95937 0.99690 1.21167 0.99561 0.93283 0.99678 1.21156 0.95256 0.99547 0.98672 1.21167 0.97304 0.95918 0.99298 1.21094 0.99735 0.92961 0.99902 1.22921 1.01428 0.77030 0.98562 0.91956 0.76496 0.90559 0.90588 0.92668 0.92052 0.77394 0.91998 0.92012 0.91364 0.91344 0.91467 0.91464 0.91748 0.91746 0.90841 0.90852 0.86087 0.86155 0.86254 0.86153 0.86083 0.91933 0.91825 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 N -0.89 -24.00 10.96 55.43 0.61 -23.39 16 2 C 0.07 1.85 5.27 -17.82 -0.09 1.76 16 3 Si 0.90 20.55 29.54 -169.99 -5.02 15.53 16 4 H -0.28 -6.35 7.11 56.52 0.40 -5.95 16 5 H -0.28 -6.42 7.11 56.52 0.40 -6.02 16 6 H -0.27 -6.11 7.11 56.52 0.40 -5.71 16 7 C -0.54 -14.12 8.11 -34.44 -0.28 -14.40 16 8 H 0.07 1.71 7.77 -52.49 -0.41 1.30 16 9 C 0.25 6.01 0.85 -89.94 -0.08 5.93 16 10 O -0.59 -14.79 13.08 -35.23 -0.46 -15.25 16 11 C -0.12 -2.29 6.23 -24.59 -0.15 -2.45 16 12 C 0.10 1.81 6.57 -2.53 -0.02 1.80 16 13 N -0.63 -13.29 3.33 -176.00 -0.59 -13.88 16 14 C 0.71 14.77 8.49 -86.91 -0.74 14.03 16 15 O -0.60 -14.80 16.67 5.29 0.09 -14.71 16 16 N -0.75 -11.36 5.52 -65.23 -0.36 -11.72 16 17 C 0.14 1.75 5.67 -4.05 -0.02 1.73 16 18 C -0.13 -1.11 5.33 -26.74 -0.14 -1.25 16 19 C -0.12 -0.83 5.21 -26.74 -0.14 -0.97 16 20 C -0.11 -0.73 5.20 -26.73 -0.14 -0.87 16 21 C -0.08 -0.52 5.35 -27.88 -0.15 -0.67 16 22 C -0.08 -0.58 5.13 -104.62 -0.54 -1.11 16 23 C -0.12 -0.85 9.70 -39.58 -0.38 -1.24 16 24 C -0.12 -0.80 10.05 -39.58 -0.40 -1.20 16 25 C -0.13 -0.85 10.05 -39.58 -0.40 -1.25 16 26 C -0.12 -0.80 10.05 -39.58 -0.40 -1.20 16 27 C -0.12 -0.85 9.70 -39.58 -0.38 -1.24 16 28 C 0.12 3.03 5.39 -2.90 -0.02 3.02 16 29 H 0.27 6.96 8.31 -40.82 -0.34 6.62 16 30 H 0.38 9.99 7.24 45.56 0.33 10.32 16 31 H 0.08 1.46 8.03 -51.93 -0.42 1.04 16 32 H 0.08 1.42 8.14 -51.93 -0.42 0.99 16 33 H 0.05 0.77 7.30 -51.93 -0.38 0.39 16 34 H 0.06 1.05 8.14 -51.92 -0.42 0.62 16 35 H 0.39 4.88 6.95 -40.82 -0.28 4.60 16 36 H 0.06 0.83 8.14 -51.93 -0.42 0.41 16 37 H 0.06 0.83 8.14 -51.93 -0.42 0.40 16 38 H 0.07 0.55 8.14 -51.93 -0.42 0.13 16 39 H 0.07 0.56 8.14 -51.92 -0.42 0.13 16 40 H 0.07 0.48 8.14 -51.93 -0.42 0.06 16 41 H 0.07 0.48 8.14 -51.93 -0.42 0.05 16 42 H 0.06 0.43 8.14 -51.93 -0.42 0.01 16 43 H 0.06 0.44 8.14 -51.93 -0.42 0.01 16 44 H 0.07 0.43 8.09 -51.93 -0.42 0.01 16 45 H 0.07 0.43 8.08 -51.93 -0.42 0.01 16 46 H 0.12 0.71 8.06 -52.48 -0.42 0.28 16 47 H 0.12 0.59 8.06 -52.49 -0.42 0.17 16 48 H 0.12 0.56 8.06 -52.49 -0.42 0.14 16 49 H 0.12 0.59 8.06 -52.49 -0.42 0.17 16 50 H 0.12 0.71 8.06 -52.48 -0.42 0.29 16 51 H 0.06 1.69 8.00 -51.93 -0.42 1.28 16 52 H 0.06 1.72 7.81 -51.93 -0.41 1.31 16 LS Contribution 422.06 15.07 6.36 6.36 Total: -1.00 -31.43 422.06 -12.13 -43.56 By element: Atomic # 1 Polarization: 21.38 SS G_CDS: -8.30 Total: 13.08 kcal Atomic # 6 Polarization: 4.89 SS G_CDS: -4.46 Total: 0.42 kcal Atomic # 7 Polarization: -48.65 SS G_CDS: -0.34 Total: -48.99 kcal Atomic # 8 Polarization: -29.59 SS G_CDS: -0.37 Total: -29.96 kcal Atomic # 14 Polarization: 20.55 SS G_CDS: -5.02 Total: 15.53 kcal Total LS contribution 6.36 Total: 6.36 kcal Total: -31.43 -12.13 -43.56 kcal The number of atoms in the molecule is 52 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. ZINC000591947708.mol2 52 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 -34.848 kcal (2) G-P(sol) polarization free energy of solvation -31.431 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -66.279 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -12.132 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.563 kcal (6) G-S(sol) free energy of system = (1) + (5) -78.410 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.07 seconds