Wall clock time and date at job start Wed Apr 1 2020 03:56:36 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 1.50697 * 1 3 3 N 1.30452 * 125.99219 * 2 1 4 4 N 1.39932 * 108.89892 * 180.26350 * 3 2 1 5 5 H 0.96998 * 125.75554 * 179.77591 * 4 3 2 6 6 C 1.34260 * 108.48881 * 359.75247 * 4 3 2 7 7 C 1.50707 * 126.28744 * 179.97438 * 6 4 3 8 8 C 1.38038 * 107.42156 * 359.97438 * 6 4 3 9 9 C 1.47432 * 126.41641 * 179.97438 * 8 6 4 10 10 O 1.21599 * 119.99697 * 90.00076 * 9 8 6 11 11 N 1.35010 * 120.00035 * 270.00454 * 9 8 6 12 12 C 1.43636 * 119.94731 * 1.45274 * 11 9 8 13 13 C 1.54974 * 115.59537 * 265.24491 * 12 11 9 14 14 C 1.55210 * 108.96523 * 337.36710 * 13 12 11 15 15 C 1.49325 * 110.60360 * 302.35090 * 14 13 12 16 16 C 1.53286 * 108.22824 * 101.43838 * 15 14 13 17 17 C 1.55940 * 105.48591 * 155.79443 * 16 15 14 18 18 C 1.55656 * 100.63098 * 293.39187 * 17 16 15 19 19 N 1.48234 * 106.45970 * 340.82802 * 18 17 16 20 20 C 1.35525 * 127.58116 * 164.22935 * 19 18 17 21 21 H 1.08002 * 119.99654 * 180.02562 * 20 19 18 22 22 C 1.38814 * 120.00175 * 0.02562 * 20 19 18 23 23 N 1.31622 * 119.99870 * 0.02562 * 22 20 19 24 24 Si 1.86802 * 119.99938 * 180.02562 * 22 20 19 25 25 H 1.48495 * 109.47131 * 90.00424 * 24 22 20 26 26 H 1.48505 * 109.46746 * 210.00414 * 24 22 20 27 27 H 1.48503 * 109.46799 * 329.99951 * 24 22 20 28 28 C 1.48348 * 104.53970 * 343.78979 * 19 18 17 29 29 C 1.44487 * 114.11135 * 285.24017 * 16 15 14 30 30 H 1.09000 * 109.47061 * 270.14041 * 1 2 3 31 31 H 1.09000 * 109.46830 * 30.14099 * 1 2 3 32 32 H 1.09003 * 109.47560 * 150.14389 * 1 2 3 33 33 H 1.08993 * 109.47029 * 270.02696 * 7 6 4 34 34 H 1.09005 * 109.46760 * 30.02801 * 7 6 4 35 35 H 1.08996 * 109.46758 * 150.02356 * 7 6 4 36 36 H 1.08840 * 108.34517 * 26.96056 * 12 11 9 37 37 H 1.08944 * 108.01373 * 143.90290 * 12 11 9 38 38 H 1.08973 * 109.47950 * 96.89450 * 13 12 11 39 39 H 1.08840 * 109.70337 * 217.10518 * 13 12 11 40 40 H 1.08441 * 108.53850 * 64.95356 * 14 13 12 41 41 H 1.09450 * 108.45854 * 182.89439 * 14 13 12 42 42 H 1.09562 * 110.13510 * 341.95948 * 15 14 13 43 43 H 1.09122 * 110.44198 * 222.33598 * 15 14 13 44 44 H 1.08453 * 110.99913 * 176.55475 * 17 16 15 45 45 H 1.08293 * 111.26740 * 50.52532 * 17 16 15 46 46 H 1.08572 * 109.32877 * 222.22535 * 18 17 16 47 47 H 1.08430 * 109.75492 * 100.06337 * 18 17 16 48 48 H 0.96992 * 119.99641 * 179.97438 * 23 22 20 49 49 H 1.07235 * 112.09795 * 164.59258 * 28 19 18 50 50 H 1.08928 * 109.97265 * 290.42810 * 28 19 18 51 51 H 1.09841 * 110.03926 * 173.72124 * 29 16 15 52 52 H 1.09848 * 110.06457 * 292.14050 * 29 16 15 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 1.5070 0.0000 0.0000 3 7 2.2736 1.0555 0.0000 4 7 3.6111 0.6442 -0.0061 5 1 4.3842 1.2300 -0.0105 6 6 3.6438 -0.6980 -0.0043 7 6 4.8800 -1.5601 -0.0098 8 6 2.3372 -1.1433 0.0034 9 6 1.8915 -2.5486 0.0073 10 8 1.7135 -3.1270 1.0620 11 7 1.6809 -3.1932 -1.1601 12 6 1.9216 -2.5188 -2.4052 13 6 0.6836 -1.8494 -3.0542 14 6 -0.6007 -2.5343 -2.5153 15 6 -0.5730 -4.0002 -2.7987 16 6 -0.1740 -4.7300 -1.5111 17 6 -0.7498 -6.1721 -1.6544 18 6 -2.2776 -5.8761 -1.6188 19 7 -2.4309 -4.5318 -1.0134 20 6 -3.5253 -3.7329 -1.0408 21 1 -3.5021 -2.7684 -0.5554 22 6 -4.6762 -4.1543 -1.6926 23 7 -4.7047 -5.3300 -2.2837 24 14 -6.1844 -3.0528 -1.7310 25 1 -6.1264 -2.1756 -2.9277 26 1 -7.4084 -3.8915 -1.7908 27 1 -6.2173 -2.2158 -0.5047 28 6 -1.1242 -4.2645 -0.3639 29 6 1.2283 -4.6200 -1.1806 30 1 -0.3633 0.0025 1.0277 31 1 -0.3633 0.8887 -0.5160 32 1 -0.3634 -0.8913 -0.5116 33 1 5.1726 -1.7690 -1.0387 34 1 5.6897 -1.0373 0.4993 35 1 4.6715 -2.4973 0.5061 36 1 2.6767 -1.7527 -2.2395 37 1 2.3242 -3.2456 -3.1098 38 1 0.6644 -0.7914 -2.7941 39 1 0.7331 -1.9572 -4.1361 40 1 -0.6764 -2.3368 -1.4517 41 1 -1.4665 -2.0911 -3.0171 42 1 0.1610 -4.2190 -3.5821 43 1 -1.5517 -4.3409 -3.1403 44 1 -0.4652 -6.7900 -0.8098 45 1 -0.4705 -6.6141 -2.6028 46 1 -2.7730 -6.6178 -0.9997 47 1 -2.6752 -5.8797 -2.6276 48 1 -5.5089 -5.6246 -2.7388 49 1 -1.0019 -3.2287 -0.1149 50 1 -0.9972 -4.9171 0.4990 51 1 1.4192 -5.0680 -0.1960 52 1 1.8330 -5.1665 -1.9171 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 ZINC001045975143.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 03:56:36 Heat of formation + Delta-G solvation = 87.271886 kcal Electronic energy + Delta-G solvation = -33732.660647 eV Core-core repulsion = 29735.316923 eV Total energy + Delta-G solvation = -3997.343725 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 346.211 amu Computer time = 1.02 seconds Orbital eigenvalues (eV) -41.65300 -40.22360 -38.26372 -35.96182 -33.68279 -33.07529 -32.73913 -31.78816 -30.32773 -28.76434 -28.26303 -27.55244 -26.70689 -25.61545 -24.37285 -23.66288 -22.07402 -20.53050 -20.20137 -19.86437 -18.52556 -18.23409 -17.43998 -16.82190 -16.61999 -15.74747 -15.26942 -15.13034 -14.81733 -14.52648 -14.23281 -13.87995 -13.73287 -13.54414 -13.46355 -13.44370 -13.21484 -12.95858 -12.63309 -12.55130 -12.38812 -12.06140 -12.02348 -11.76130 -11.58397 -11.40135 -11.09455 -10.91564 -10.82945 -10.71881 -10.60602 -10.21830 -10.09009 -10.04512 -9.82184 -9.58729 -9.51381 -9.45706 -9.37191 -9.28597 -8.65844 -8.59836 -8.39058 -6.77165 -5.60376 -2.91110 1.55301 2.38879 2.54942 2.76126 3.27928 3.44799 3.51006 3.52013 4.30994 4.50569 4.58269 4.70290 4.89298 5.01258 5.09766 5.15153 5.18538 5.31573 5.33651 5.44411 5.51090 5.58985 5.62305 5.65849 5.69245 5.72879 5.81605 5.86329 5.90806 5.92894 6.01660 6.10697 6.13791 6.17132 6.34993 6.42014 6.45749 6.54693 6.65352 6.68191 6.71491 6.78059 6.94172 7.00566 7.05508 7.21898 7.37155 7.48855 7.56634 7.65494 7.67811 7.89246 8.29621 8.40778 9.27069 9.88956 10.66889 11.50647 Molecular weight = 346.21amu Principal moments of inertia in cm(-1) A = 0.014816 B = 0.004018 C = 0.003547 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1889.377784 B = 6966.359539 C = 7891.425485 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.089 4.089 2 C 0.126 3.874 3 N -0.297 5.297 4 N -0.466 5.466 5 H 0.439 0.561 6 C 0.121 3.879 7 C -0.097 4.097 8 C -0.269 4.269 9 C 0.598 3.402 10 O -0.532 6.532 11 N -0.590 5.590 12 C 0.115 3.885 13 C -0.141 4.141 14 C -0.107 4.107 15 C -0.084 4.084 16 C -0.111 4.111 17 C -0.134 4.134 18 C 0.166 3.834 19 N -0.597 5.597 20 C -0.205 4.205 21 H 0.074 0.926 22 C -0.014 4.014 23 N -0.925 5.925 24 Si 0.904 3.096 25 H -0.291 1.291 26 H -0.293 1.293 27 H -0.283 1.283 28 C 0.145 3.855 29 C 0.149 3.851 30 H 0.083 0.917 31 H 0.078 0.922 32 H 0.089 0.911 33 H 0.085 0.915 34 H 0.076 0.924 35 H 0.090 0.910 36 H 0.063 0.937 37 H 0.064 0.936 38 H 0.056 0.944 39 H 0.065 0.935 40 H 0.073 0.927 41 H 0.054 0.946 42 H 0.036 0.964 43 H 0.091 0.909 44 H 0.054 0.946 45 H 0.059 0.941 46 H 0.016 0.984 47 H 0.080 0.920 48 H 0.250 0.750 49 H 0.054 0.946 50 H 0.024 0.976 51 H 0.085 0.915 52 H 0.065 0.935 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 20.677 6.935 -1.150 21.840 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 -0.147 4.147 2 C -0.042 4.042 3 N -0.120 5.120 4 N -0.172 5.172 5 H 0.283 0.717 6 C -0.011 4.011 7 C -0.156 4.156 8 C -0.284 4.284 9 C 0.385 3.615 10 O -0.408 6.408 11 N -0.322 5.322 12 C -0.010 4.010 13 C -0.180 4.180 14 C -0.144 4.144 15 C -0.121 4.121 16 C -0.114 4.114 17 C -0.173 4.173 18 C 0.041 3.959 19 N -0.321 5.321 20 C -0.334 4.334 21 H 0.092 0.908 22 C -0.210 4.210 23 N -0.575 5.575 24 Si 0.736 3.264 25 H -0.219 1.219 26 H -0.219 1.219 27 H -0.209 1.209 28 C 0.018 3.982 29 C 0.028 3.972 30 H 0.101 0.899 31 H 0.097 0.903 32 H 0.107 0.893 33 H 0.104 0.896 34 H 0.095 0.905 35 H 0.108 0.892 36 H 0.082 0.918 37 H 0.083 0.917 38 H 0.075 0.925 39 H 0.084 0.916 40 H 0.092 0.908 41 H 0.073 0.927 42 H 0.055 0.945 43 H 0.110 0.890 44 H 0.072 0.928 45 H 0.078 0.922 46 H 0.034 0.966 47 H 0.098 0.902 48 H 0.060 0.940 49 H 0.072 0.928 50 H 0.042 0.958 51 H 0.103 0.897 52 H 0.083 0.917 Dipole moment (debyes) X Y Z Total from point charges 20.317 7.902 -0.654 21.809 hybrid contribution -0.498 0.119 -0.120 0.526 sum 19.818 8.021 -0.774 21.394 Atomic orbital electron populations 1.20484 0.85874 1.04470 1.03904 1.22348 0.96994 0.88667 0.96145 1.77109 0.86014 1.22147 1.26755 1.45940 1.07634 1.04601 1.59050 0.71688 1.21311 0.96051 0.85058 0.98693 1.20552 0.92208 0.99018 1.03809 1.19885 0.92014 0.94535 1.21945 1.17377 0.76568 0.84216 0.83367 1.90779 1.51495 1.67564 1.30932 1.47899 1.65974 1.13058 1.05235 1.21071 0.97308 0.96809 0.85810 1.22878 0.96133 0.99317 0.99631 1.21289 0.95112 0.96046 1.01993 1.20932 1.02418 0.94324 0.94442 1.21040 0.93490 0.98047 0.98784 1.23220 1.00025 0.94260 0.99822 1.21636 0.88342 0.86164 0.99730 1.44582 1.09747 1.17065 1.60657 1.18681 0.89170 0.97497 1.28098 0.90778 1.24665 0.97708 0.97100 1.01494 1.69871 1.27610 1.19103 1.40871 0.86212 0.83123 0.79493 0.77597 1.21876 1.21929 1.20920 1.22015 0.86110 0.97719 0.92341 1.20177 0.94528 0.79629 1.02885 0.89881 0.90325 0.89252 0.89604 0.90522 0.89164 0.91812 0.91710 0.92549 0.91626 0.90847 0.92718 0.94513 0.89013 0.92771 0.92210 0.96596 0.90200 0.93998 0.92781 0.95827 0.89707 0.91687 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -0.09 -1.21 10.28 36.00 0.37 -0.84 16 2 C 0.13 1.76 7.26 -82.02 -0.60 1.16 16 3 N -0.30 -3.91 12.63 33.90 0.43 -3.48 16 4 N -0.47 -4.56 7.29 33.86 0.25 -4.31 16 5 H 0.44 2.64 8.96 -182.73 -1.64 1.00 16 6 C 0.12 1.26 6.88 -81.60 -0.56 0.70 16 7 C -0.10 -0.67 10.25 36.01 0.37 -0.30 16 8 C -0.27 -3.66 4.08 -105.07 -0.43 -4.09 16 9 C 0.60 9.21 6.86 -12.41 -0.09 9.13 16 10 O -0.53 -10.09 16.64 5.28 0.09 -10.01 16 11 N -0.59 -8.11 2.08 -177.20 -0.37 -8.48 16 12 C 0.12 1.35 5.11 -4.52 -0.02 1.33 16 13 C -0.14 -1.81 6.22 -24.52 -0.15 -1.96 16 14 C -0.11 -1.78 4.78 -27.37 -0.13 -1.91 16 15 C -0.08 -1.46 3.94 -28.39 -0.11 -1.57 16 16 C -0.11 -1.89 0.72 -155.11 -0.11 -2.01 16 17 C -0.13 -2.41 5.92 -23.74 -0.14 -2.55 16 18 C 0.17 3.88 4.67 -1.67 -0.01 3.88 16 19 N -0.60 -14.55 2.14 -168.37 -0.36 -14.92 16 20 C -0.21 -5.52 10.35 -15.71 -0.16 -5.69 16 21 H 0.07 1.97 7.83 -52.49 -0.41 1.56 16 22 C -0.01 -0.40 5.49 -17.43 -0.10 -0.49 16 23 N -0.93 -26.66 10.48 55.49 0.58 -26.08 16 24 Si 0.90 22.11 29.55 -169.99 -5.02 17.09 16 25 H -0.29 -7.09 7.11 56.52 0.40 -6.69 16 26 H -0.29 -7.30 7.11 56.52 0.40 -6.90 16 27 H -0.28 -6.82 7.11 56.52 0.40 -6.42 16 28 C 0.14 3.03 5.69 -1.38 -0.01 3.02 16 29 C 0.15 2.16 4.82 -6.22 -0.03 2.13 16 30 H 0.08 1.11 8.14 -51.93 -0.42 0.69 16 31 H 0.08 0.95 8.14 -51.93 -0.42 0.53 16 32 H 0.09 1.35 5.45 -51.93 -0.28 1.06 16 33 H 0.09 0.45 8.14 -51.93 -0.42 0.03 16 34 H 0.08 0.34 8.14 -51.93 -0.42 -0.08 16 35 H 0.09 0.74 7.96 -51.93 -0.41 0.32 16 36 H 0.06 0.69 6.32 -52.02 -0.33 0.36 16 37 H 0.06 0.67 7.92 -51.96 -0.41 0.26 16 38 H 0.06 0.72 8.14 -51.94 -0.42 0.30 16 39 H 0.07 0.78 8.13 -52.02 -0.42 0.35 16 40 H 0.07 1.33 2.57 -52.24 -0.13 1.19 16 41 H 0.05 1.01 8.18 -51.67 -0.42 0.58 16 42 H 0.04 0.56 7.56 -51.61 -0.39 0.17 16 43 H 0.09 1.98 5.68 -51.86 -0.29 1.69 16 44 H 0.05 0.93 8.09 -52.24 -0.42 0.50 16 45 H 0.06 0.97 8.05 -52.32 -0.42 0.55 16 46 H 0.02 0.41 8.11 -52.17 -0.42 -0.01 16 47 H 0.08 2.06 5.90 -52.25 -0.31 1.76 16 48 H 0.25 7.09 8.31 -40.82 -0.34 6.75 16 49 H 0.05 1.16 6.07 -52.91 -0.32 0.84 16 50 H 0.02 0.53 8.00 -51.97 -0.42 0.11 16 51 H 0.08 1.32 7.25 -51.45 -0.37 0.95 16 52 H 0.06 0.80 8.08 -51.45 -0.42 0.38 16 LS Contribution 390.59 15.07 5.89 5.89 Total: -1.00 -32.60 390.59 -9.93 -42.53 By element: Atomic # 1 Polarization: 11.34 SS G_CDS: -9.50 Total: 1.84 kcal Atomic # 6 Polarization: 1.83 SS G_CDS: -1.91 Total: -0.07 kcal Atomic # 7 Polarization: -57.79 SS G_CDS: 0.53 Total: -57.26 kcal Atomic # 8 Polarization: -10.09 SS G_CDS: 0.09 Total: -10.01 kcal Atomic # 14 Polarization: 22.11 SS G_CDS: -5.02 Total: 17.09 kcal Total LS contribution 5.89 Total: 5.89 kcal Total: -32.60 -9.93 -42.53 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. ZINC001045975143.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 129.802 kcal (2) G-P(sol) polarization free energy of solvation -32.603 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 97.199 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.927 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.531 kcal (6) G-S(sol) free energy of system = (1) + (5) 87.272 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.02 seconds