Wall clock time and date at job start Sat Apr 11 2020 06:09:21 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 C 1.53000 * 109.47336 * 2 1 4 4 H 1.08999 * 109.47120 * 55.00182 * 3 2 1 5 5 C 1.52998 * 109.47069 * 294.99816 * 3 2 1 6 6 C 1.53004 * 109.46941 * 175.00106 * 3 2 1 7 7 H 1.08999 * 109.46859 * 304.99646 * 6 3 2 8 8 N 1.46498 * 109.46758 * 184.99840 * 6 3 2 9 9 C 1.34784 * 119.99890 * 154.99851 * 8 6 3 10 10 O 1.21282 * 119.99715 * 0.02562 * 9 8 6 11 11 C 1.50698 * 120.00146 * 179.97438 * 9 8 6 12 12 N 1.46499 * 109.47344 * 180.02562 * 11 9 8 13 13 C 1.36936 * 120.00127 * 270.00202 * 12 11 9 14 14 H 1.07993 * 120.00380 * 187.59014 * 13 12 11 15 15 C 1.38820 * 119.99699 * 7.58842 * 13 12 11 16 16 N 1.31614 * 120.00108 * 26.69107 * 15 13 12 17 17 Si 1.86797 * 119.99770 * 206.69471 * 15 13 12 18 18 H 1.48507 * 109.47257 * 359.97438 * 17 15 13 19 19 H 1.48500 * 109.47364 * 119.99877 * 17 15 13 20 20 H 1.48504 * 109.47118 * 239.99982 * 17 15 13 21 21 C 1.46501 * 119.99843 * 89.99506 * 12 11 9 22 22 C 1.54261 * 110.02854 * 117.08412 * 21 12 11 23 23 C 1.54970 * 104.16360 * 95.75496 * 22 21 12 24 24 C 1.54887 * 102.77409 * 37.88528 * 23 22 21 25 25 C 1.53878 * 110.03328 * 234.30001 * 21 12 11 26 26 C 1.50697 * 109.47322 * 64.99774 * 6 3 2 27 27 O 1.20821 * 120.00051 * 119.99946 * 26 6 3 28 28 O 1.34228 * 120.00165 * 299.99923 * 26 6 3 29 29 C 1.45199 * 117.00292 * 180.02562 * 28 26 6 30 30 H 1.09003 * 109.47044 * 300.00655 * 1 2 3 31 31 H 1.08998 * 109.46923 * 59.99798 * 1 2 3 32 32 H 1.08997 * 109.47522 * 180.02562 * 1 2 3 33 33 H 1.09003 * 109.47044 * 239.99345 * 2 1 3 34 34 H 1.09004 * 109.46889 * 119.99760 * 2 1 3 35 35 H 1.09004 * 109.46763 * 300.00236 * 5 3 2 36 36 H 1.08996 * 109.47285 * 60.00015 * 5 3 2 37 37 H 1.08993 * 109.47490 * 180.02562 * 5 3 2 38 38 H 0.96997 * 120.00497 * 334.99639 * 8 6 3 39 39 H 1.09002 * 109.46954 * 59.99897 * 11 9 8 40 40 H 1.09003 * 109.46720 * 299.99955 * 11 9 8 41 41 H 0.97002 * 120.00220 * 174.63799 * 16 15 13 42 42 H 1.08997 * 110.01752 * 355.69398 * 21 12 11 43 43 H 1.09005 * 110.49037 * 214.40163 * 22 21 12 44 44 H 1.09005 * 110.49153 * 337.04529 * 22 21 12 45 45 H 1.08999 * 110.71475 * 279.57848 * 23 22 21 46 46 H 1.08992 * 110.92744 * 156.29483 * 23 22 21 47 47 H 1.08999 * 110.48891 * 203.40859 * 24 23 22 48 48 H 1.08997 * 110.59891 * 80.81998 * 24 23 22 49 49 H 1.08999 * 110.02733 * 359.95433 * 25 21 12 50 50 H 1.08995 * 110.03141 * 121.38483 * 25 21 12 51 51 H 1.09001 * 109.47075 * 299.99761 * 29 28 26 52 52 H 1.09001 * 109.47159 * 59.99773 * 29 28 26 53 53 H 1.09003 * 109.47084 * 180.02562 * 29 28 26 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 2.0400 1.4425 0.0000 4 1 1.6055 1.9815 0.8418 5 6 1.6353 2.1265 -1.3074 6 6 3.5649 1.4442 0.1257 7 1 3.8571 0.8799 1.0113 8 7 4.0433 2.8236 0.2457 9 6 5.2191 3.0787 0.8533 10 8 5.8812 2.1660 1.3003 11 6 5.7116 4.4976 0.9763 12 7 7.0022 4.5082 1.6695 13 6 7.0457 4.6172 3.0338 14 1 7.9932 4.7485 3.5351 15 6 5.8718 4.5591 3.7725 16 7 4.8305 3.9053 3.3030 17 14 5.7701 5.4090 5.4329 18 1 7.0665 6.0692 5.7313 19 1 4.6906 6.4283 5.4020 20 1 5.4727 4.4047 6.4856 21 6 8.2462 4.4021 0.9031 22 6 9.0880 5.6824 1.0822 23 6 10.0786 5.3287 2.2203 24 6 10.4273 3.8491 1.9233 25 6 9.0971 3.2369 1.4379 26 6 4.1706 0.8071 -1.0983 27 8 4.9246 1.4403 -1.7986 28 8 3.8725 -0.4638 -1.4107 29 6 4.4928 -1.0125 -2.6033 30 1 -0.3633 0.5140 0.8900 31 1 -0.3633 0.5139 -0.8900 32 1 -0.3634 -1.0276 0.0005 33 1 1.8933 -0.5140 -0.8900 34 1 1.8933 -0.5138 0.8900 35 1 2.0700 1.5873 -2.1491 36 1 0.5491 2.1252 -1.3970 37 1 1.9990 3.1540 -1.3076 38 1 3.5140 3.5535 -0.1120 39 1 4.9894 5.0850 1.5433 40 1 5.8300 4.9285 -0.0179 41 1 4.0375 3.7982 3.8513 42 1 8.0221 4.2472 -0.1523 43 1 9.6286 5.9150 0.1647 44 1 8.4530 6.5188 1.3744 45 1 9.5975 5.4242 3.1937 46 1 10.9701 5.9535 2.1686 47 1 10.7695 3.3485 2.8290 48 1 11.1850 3.7830 1.1425 49 1 8.5847 2.7509 2.2682 50 1 9.2860 2.5165 0.6421 51 1 4.1990 -0.4211 -3.4705 52 1 5.5771 -0.9842 -2.4947 53 1 4.1678 -2.0439 -2.7403 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 ZINC000151119981.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 06:09:21 Heat of formation + Delta-G solvation = -104.693488 kcal Electronic energy + Delta-G solvation = -32589.902090 eV Core-core repulsion = 28462.399981 eV Total energy + Delta-G solvation = -4127.502109 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.12 seconds Orbital eigenvalues (eV) -40.53655 -38.47729 -37.59787 -36.50878 -36.10197 -33.88328 -32.95028 -30.84281 -29.86626 -28.39703 -27.77150 -27.46461 -26.61587 -25.89095 -23.77295 -22.53808 -21.37389 -19.91445 -19.68678 -19.34639 -18.96322 -17.20722 -17.03351 -16.38199 -16.14804 -15.70405 -15.45516 -14.83888 -14.66358 -14.53172 -14.11078 -14.05528 -13.81014 -13.46428 -13.19834 -13.06308 -12.75412 -12.67797 -12.47636 -12.24046 -12.19542 -12.00450 -11.77075 -11.50982 -11.25683 -11.01264 -10.86810 -10.76860 -10.69666 -10.66275 -10.56620 -10.36594 -10.33954 -10.28351 -10.21246 -10.17523 -10.03666 -9.87222 -9.58341 -9.39116 -8.71082 -8.24080 -8.17385 -6.81775 -5.75648 -2.96855 2.56872 2.87271 3.40883 3.50244 3.51869 4.04264 4.38736 4.59032 4.73849 4.91873 4.96339 5.13622 5.16479 5.24154 5.33845 5.34939 5.36125 5.49225 5.50757 5.52073 5.60145 5.60683 5.67770 5.78902 5.89216 5.93624 6.01207 6.02718 6.09405 6.19582 6.34043 6.35846 6.38159 6.41103 6.43908 6.47659 6.59890 6.61921 6.64448 6.70863 6.81847 6.89934 6.97817 7.12979 7.26459 7.30062 7.46835 7.95590 8.09996 8.33269 8.61454 9.23416 9.73495 9.94506 10.35995 11.34959 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.012099 B = 0.004001 C = 0.003261 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2313.728564 B = 6996.576909 C = 8584.159244 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.150 4.150 2 C -0.126 4.126 3 C -0.092 4.092 4 H 0.094 0.906 5 C -0.152 4.152 6 C 0.169 3.831 7 H 0.119 0.881 8 N -0.727 5.727 9 C 0.537 3.463 10 O -0.526 6.526 11 C 0.163 3.837 12 N -0.564 5.564 13 C -0.233 4.233 14 H 0.085 0.915 15 C -0.005 4.005 16 N -0.901 5.901 17 Si 0.897 3.103 18 H -0.280 1.280 19 H -0.291 1.291 20 H -0.296 1.296 21 C 0.174 3.826 22 C -0.132 4.132 23 C -0.120 4.120 24 C -0.121 4.121 25 C -0.130 4.130 26 C 0.451 3.549 27 O -0.500 6.500 28 O -0.359 6.359 29 C 0.033 3.967 30 H 0.053 0.947 31 H 0.054 0.946 32 H 0.052 0.948 33 H 0.081 0.919 34 H 0.067 0.933 35 H 0.050 0.950 36 H 0.064 0.936 37 H 0.059 0.941 38 H 0.391 0.609 39 H 0.104 0.896 40 H 0.037 0.963 41 H 0.251 0.749 42 H 0.049 0.951 43 H 0.047 0.953 44 H 0.069 0.931 45 H 0.074 0.926 46 H 0.046 0.954 47 H 0.052 0.948 48 H 0.049 0.951 49 H 0.084 0.916 50 H 0.041 0.959 51 H 0.057 0.943 52 H 0.059 0.941 53 H 0.096 0.904 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -5.926 -4.674 -10.338 12.800 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 -0.207 4.207 2 C -0.163 4.163 3 C -0.111 4.111 4 H 0.112 0.888 5 C -0.209 4.209 6 C 0.060 3.940 7 H 0.136 0.864 8 N -0.383 5.383 9 C 0.324 3.676 10 O -0.399 6.399 11 C 0.033 3.967 12 N -0.283 5.283 13 C -0.362 4.362 14 H 0.102 0.898 15 C -0.202 4.202 16 N -0.548 5.548 17 Si 0.728 3.272 18 H -0.206 1.206 19 H -0.218 1.218 20 H -0.224 1.224 21 C 0.066 3.934 22 C -0.171 4.171 23 C -0.157 4.157 24 C -0.159 4.159 25 C -0.169 4.169 26 C 0.292 3.708 27 O -0.386 6.386 28 O -0.276 6.276 29 C -0.062 4.062 30 H 0.072 0.928 31 H 0.073 0.927 32 H 0.071 0.929 33 H 0.099 0.901 34 H 0.085 0.915 35 H 0.069 0.931 36 H 0.083 0.917 37 H 0.078 0.922 38 H 0.225 0.775 39 H 0.122 0.878 40 H 0.055 0.945 41 H 0.062 0.938 42 H 0.067 0.933 43 H 0.066 0.934 44 H 0.088 0.912 45 H 0.092 0.908 46 H 0.065 0.935 47 H 0.070 0.930 48 H 0.068 0.932 49 H 0.103 0.897 50 H 0.060 0.940 51 H 0.076 0.924 52 H 0.078 0.922 53 H 0.114 0.886 Dipole moment (debyes) X Y Z Total from point charges -5.285 -5.085 -10.151 12.523 hybrid contribution -0.292 0.334 0.639 0.778 sum -5.577 -4.751 -9.512 12.007 Atomic orbital electron populations 1.21794 0.95850 1.01361 1.01711 1.21704 0.95619 0.95325 1.03692 1.21384 0.92018 0.97971 0.99683 0.88768 1.21953 1.01741 1.00673 0.96548 1.20323 0.93140 0.87023 0.93544 0.86391 1.46173 1.24906 1.04517 1.62685 1.22261 0.78311 0.93889 0.73121 1.90501 1.56419 1.47120 1.45854 1.20757 0.89824 0.91612 0.94549 1.44199 0.98405 1.82446 1.03206 1.19324 0.93432 1.41351 0.82102 0.89761 1.24676 0.97036 1.00589 0.97902 1.69848 1.06379 1.41679 1.36906 0.86262 0.77379 0.79568 0.83942 1.20577 1.21845 1.22377 1.20931 0.86706 0.92097 0.93649 1.22810 0.97654 0.99840 0.96799 1.22508 0.97747 0.95361 1.00116 1.22299 0.97626 0.96449 0.99501 1.22581 0.94823 0.98325 1.01167 1.24908 0.79077 0.79680 0.87137 1.90620 1.33657 1.63324 1.50960 1.86593 1.66340 1.29907 1.44741 1.23169 0.98582 0.98618 0.85788 0.92778 0.92742 0.92917 0.90108 0.91464 0.93130 0.91704 0.92224 0.77489 0.87783 0.94508 0.93824 0.93309 0.93384 0.91177 0.90769 0.93538 0.92957 0.93250 0.89723 0.94015 0.92410 0.92208 0.88598 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 20. 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 -1.38 9.67 37.16 0.36 -1.02 16 2 C -0.13 -1.41 4.88 -26.73 -0.13 -1.54 16 3 C -0.09 -1.16 2.32 -90.62 -0.21 -1.37 16 4 H 0.09 1.20 8.14 -51.93 -0.42 0.78 16 5 C -0.15 -1.70 8.50 37.16 0.32 -1.38 16 6 C 0.17 2.85 2.29 -69.08 -0.16 2.69 16 7 H 0.12 2.29 7.58 -51.93 -0.39 1.90 16 8 N -0.73 -13.63 4.54 -54.93 -0.25 -13.88 16 9 C 0.54 12.52 5.75 -10.98 -0.06 12.45 16 10 O -0.53 -14.43 15.84 5.56 0.09 -14.34 16 11 C 0.16 3.74 5.39 -5.19 -0.03 3.71 16 12 N -0.56 -13.61 1.92 -165.75 -0.32 -13.93 16 13 C -0.23 -6.09 8.08 -15.06 -0.12 -6.21 16 14 H 0.08 2.20 5.37 -52.49 -0.28 1.92 16 15 C -0.01 -0.14 4.86 -17.43 -0.08 -0.23 16 16 N -0.90 -24.36 9.07 55.49 0.50 -23.86 16 17 Si 0.90 21.43 29.63 -169.99 -5.04 16.39 16 18 H -0.28 -6.62 7.11 56.52 0.40 -6.21 16 19 H -0.29 -6.97 7.11 56.52 0.40 -6.57 16 20 H -0.30 -7.32 7.11 56.52 0.40 -6.92 16 21 C 0.17 3.72 3.47 -66.81 -0.23 3.49 16 22 C -0.13 -2.44 6.18 -25.03 -0.15 -2.59 16 23 C -0.12 -2.14 6.45 -24.70 -0.16 -2.30 16 24 C -0.12 -2.16 6.83 -25.07 -0.17 -2.33 16 25 C -0.13 -2.76 6.20 -25.61 -0.16 -2.91 16 26 C 0.45 7.81 5.76 36.00 0.21 8.01 16 27 O -0.50 -10.07 16.07 -18.75 -0.30 -10.37 16 28 O -0.36 -5.21 7.79 -39.25 -0.31 -5.52 16 29 C 0.03 0.37 10.56 101.05 1.07 1.44 16 30 H 0.05 0.49 8.14 -51.93 -0.42 0.07 16 31 H 0.05 0.46 6.56 -51.93 -0.34 0.12 16 32 H 0.05 0.44 8.14 -51.93 -0.42 0.02 16 33 H 0.08 0.93 5.77 -51.93 -0.30 0.63 16 34 H 0.07 0.79 8.14 -51.93 -0.42 0.37 16 35 H 0.05 0.60 7.07 -51.93 -0.37 0.23 16 36 H 0.06 0.60 6.56 -51.93 -0.34 0.26 16 37 H 0.06 0.67 6.77 -51.93 -0.35 0.32 16 38 H 0.39 6.33 7.18 -40.82 -0.29 6.04 16 39 H 0.10 2.51 6.29 -51.93 -0.33 2.18 16 40 H 0.04 0.76 7.97 -51.93 -0.41 0.34 16 41 H 0.25 6.74 8.32 -40.82 -0.34 6.40 16 42 H 0.05 1.04 7.86 -51.93 -0.41 0.63 16 43 H 0.05 0.79 8.14 -51.93 -0.42 0.36 16 44 H 0.07 1.36 8.04 -51.93 -0.42 0.95 16 45 H 0.07 1.46 6.11 -51.93 -0.32 1.14 16 46 H 0.05 0.72 8.14 -51.93 -0.42 0.29 16 47 H 0.05 0.91 8.14 -51.93 -0.42 0.48 16 48 H 0.05 0.79 8.14 -51.93 -0.42 0.36 16 49 H 0.08 2.13 7.15 -51.93 -0.37 1.76 16 50 H 0.04 0.86 8.14 -51.93 -0.42 0.44 16 51 H 0.06 0.63 8.13 -51.93 -0.42 0.21 16 52 H 0.06 0.74 8.13 -51.93 -0.42 0.32 16 53 H 0.10 0.77 8.14 -51.93 -0.42 0.35 16 LS Contribution 405.68 15.07 6.11 6.11 Total: -1.00 -31.95 405.68 -8.36 -40.32 By element: Atomic # 1 Polarization: 18.28 SS G_CDS: -9.13 Total: 9.15 kcal Atomic # 6 Polarization: 9.66 SS G_CDS: 0.28 Total: 9.93 kcal Atomic # 7 Polarization: -51.60 SS G_CDS: -0.06 Total: -51.67 kcal Atomic # 8 Polarization: -29.72 SS G_CDS: -0.52 Total: -30.23 kcal Atomic # 14 Polarization: 21.43 SS G_CDS: -5.04 Total: 16.39 kcal Total LS contribution 6.11 Total: 6.11 kcal Total: -31.95 -8.36 -40.32 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. ZINC000151119981.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 -64.378 kcal (2) G-P(sol) polarization free energy of solvation -31.954 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -96.332 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.361 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.315 kcal (6) G-S(sol) free energy of system = (1) + (5) -104.693 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.12 seconds