Wall clock time and date at job start Sat Apr 11 2020 06:11:41 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 O 1.42891 * 109.47734 * 2 1 4 4 C 1.42903 * 114.00274 * 179.97438 * 3 2 1 5 5 H 1.08998 * 112.84798 * 21.69577 * 4 3 2 6 6 C 1.53777 * 113.61640 * 250.49544 * 4 3 2 7 7 C 1.53772 * 87.08113 * 219.93614 * 6 4 3 8 8 O 1.42902 * 113.61410 * 140.06760 * 7 6 4 9 9 C 1.53004 * 113.61547 * 270.88409 * 7 6 4 10 10 N 1.46499 * 109.47297 * 285.49636 * 9 7 6 11 11 C 1.34773 * 120.00364 * 179.97438 * 10 9 7 12 12 O 1.21591 * 119.99752 * 4.67516 * 11 10 9 13 13 N 1.34772 * 120.00168 * 184.68452 * 11 10 9 14 14 C 1.46500 * 120.00081 * 184.72892 * 13 11 10 15 15 C 1.52998 * 109.47378 * 184.70116 * 14 13 11 16 16 C 1.50704 * 115.54679 * 294.78497 * 15 14 13 17 17 H 1.07999 * 120.00178 * 121.87231 * 16 15 14 18 18 C 1.37881 * 120.00001 * 301.59911 * 16 15 14 19 19 N 1.31521 * 119.99793 * 172.89719 * 18 16 15 20 20 Si 1.86793 * 120.00177 * 352.89509 * 18 16 15 21 21 H 1.48490 * 109.47216 * 94.26236 * 20 18 16 22 22 H 1.48497 * 109.47092 * 214.26621 * 20 18 16 23 23 H 1.48504 * 109.47042 * 334.26135 * 20 18 16 24 24 C 1.52997 * 117.50086 * 80.45513 * 15 14 13 25 25 C 1.52995 * 117.50255 * 149.12050 * 15 14 13 26 26 C 1.53777 * 113.68844 * 152.95971 * 4 3 2 27 27 C 1.53005 * 113.61818 * 25.44576 * 26 4 3 28 28 C 1.53004 * 113.61493 * 254.54134 * 26 4 3 29 29 H 1.08997 * 109.47363 * 59.99403 * 1 2 3 30 30 H 1.08994 * 109.47759 * 179.97438 * 1 2 3 31 31 H 1.08999 * 109.46847 * 300.00122 * 1 2 3 32 32 H 1.09007 * 109.46569 * 239.99810 * 2 1 3 33 33 H 1.09004 * 109.47027 * 120.00755 * 2 1 3 34 34 H 1.09003 * 113.61111 * 105.38353 * 6 4 3 35 35 H 1.09000 * 113.61622 * 334.48943 * 6 4 3 36 36 H 0.96694 * 114.00210 * 80.86482 * 8 7 6 37 37 H 1.08999 * 109.47250 * 165.49909 * 9 7 6 38 38 H 1.08995 * 109.46973 * 45.49683 * 9 7 6 39 39 H 0.97004 * 119.99998 * 0.02562 * 10 9 7 40 40 H 0.96998 * 120.00461 * 4.71473 * 13 11 10 41 41 H 1.09000 * 109.47642 * 64.69222 * 14 13 11 42 42 H 1.09001 * 109.46769 * 304.69745 * 14 13 11 43 43 H 0.96995 * 119.99905 * 179.97438 * 19 18 16 44 44 H 1.09000 * 117.50073 * 214.99906 * 24 15 14 45 45 H 1.08995 * 117.49883 * 0.02998 * 24 15 14 46 46 H 1.09001 * 117.50056 * 359.97091 * 25 15 14 47 47 H 1.09003 * 117.50223 * 144.97416 * 25 15 14 48 48 H 1.09000 * 109.47268 * 157.48932 * 27 26 4 49 49 H 1.08991 * 109.47208 * 277.49794 * 27 26 4 50 50 H 1.09007 * 109.46320 * 37.49894 * 27 26 4 51 51 H 1.08991 * 109.47370 * 322.50548 * 28 26 4 52 52 H 1.09005 * 109.46969 * 82.51049 * 28 26 4 53 53 H 1.09003 * 109.46846 * 202.50469 * 28 26 4 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 8 2.0064 1.3471 0.0000 4 6 3.4310 1.4599 0.0006 5 1 3.9267 0.5628 -0.3704 6 6 4.0075 1.9777 1.3289 7 6 4.9931 2.8057 0.4877 8 8 5.2233 4.1184 1.0032 9 6 6.2884 2.0629 0.1539 10 7 7.1367 2.0003 1.3467 11 6 8.3358 1.3877 1.2895 12 8 8.7510 0.9620 0.2289 13 7 9.0746 1.2468 2.4078 14 6 10.4211 0.6749 2.3291 15 6 10.9920 0.5182 3.7398 16 6 11.2326 1.8029 4.4901 17 1 10.7485 1.9720 5.4405 18 6 12.0752 2.7600 3.9656 19 7 12.1777 3.9354 4.5467 20 14 13.0712 2.3874 2.4300 21 1 12.3341 2.8670 1.2335 22 1 14.3839 3.0767 2.5120 23 1 13.2874 0.9220 2.3237 24 6 10.5472 -0.7007 4.5506 25 6 11.9674 -0.6352 3.9832 26 6 3.9482 2.7589 -0.6396 27 6 2.9413 3.9099 -0.5901 28 6 4.5550 2.5578 -2.0297 29 1 -0.3634 0.5139 -0.8899 30 1 -0.3634 -1.0276 -0.0005 31 1 -0.3633 0.5139 0.8900 32 1 1.8932 -0.5139 -0.8901 33 1 1.8933 -0.5140 0.8900 34 1 4.4874 1.2036 1.9277 35 1 3.3063 2.5839 1.9024 36 1 5.8616 4.1497 1.7289 37 1 6.8162 2.5916 -0.6398 38 1 6.0524 1.0518 -0.1775 39 1 6.8350 2.3991 2.1779 40 1 8.7150 1.5242 3.2649 41 1 11.0637 1.3368 1.7485 42 1 10.3736 -0.3010 1.8459 43 1 12.7707 4.6087 4.1781 44 1 10.4286 -0.5734 5.6266 45 1 9.8482 -1.3912 4.0788 46 1 12.2021 -1.2826 3.1383 47 1 12.7833 -0.4647 4.6856 48 1 3.4700 4.8592 -0.6758 49 1 2.2358 3.8111 -1.4150 50 1 2.4008 3.8792 0.3560 51 1 5.1024 1.6157 -2.0544 52 1 3.7587 2.5351 -2.7738 53 1 5.2359 3.3796 -2.2512 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 ZINC000431116113.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 06:11:41 Heat of formation + Delta-G solvation = -81.736173 kcal Electronic energy + Delta-G solvation = -31042.646423 eV Core-core repulsion = 26916.139818 eV Total energy + Delta-G solvation = -4126.506605 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.68 seconds Orbital eigenvalues (eV) -41.18810 -39.44012 -37.64301 -37.07972 -35.22856 -34.07405 -33.40276 -32.23328 -31.44832 -30.62196 -28.50703 -27.16145 -26.15234 -24.86032 -23.48557 -22.89543 -22.49599 -21.62867 -20.51458 -19.36260 -18.72057 -18.28230 -17.30527 -16.71922 -16.23346 -16.03303 -15.68958 -15.54002 -15.40658 -14.93565 -14.71531 -14.28009 -14.04425 -13.93738 -13.80312 -13.34824 -13.21482 -12.95210 -12.92062 -12.76543 -12.68620 -12.50805 -12.32002 -12.23419 -12.17238 -11.99294 -11.72347 -11.53556 -11.15781 -11.08278 -10.82274 -10.70462 -10.59580 -10.59143 -10.27907 -9.96749 -9.89515 -9.62089 -9.54158 -9.23409 -9.05134 -8.85935 -8.52526 -8.19980 -6.22003 -4.23513 2.92941 3.26954 3.27396 3.37307 3.42481 3.58748 3.91681 4.06908 4.22767 4.32008 4.35422 4.42323 4.62108 4.71992 4.75392 4.91403 4.94882 4.98286 5.04410 5.12627 5.19342 5.28640 5.37732 5.48520 5.52941 5.56273 5.57092 5.60262 5.64968 5.73446 5.75429 5.81852 5.85426 5.89671 5.93004 6.11170 6.12500 6.21622 6.28221 6.40997 6.45760 6.54823 6.67888 6.88715 6.96616 7.04177 7.11813 7.29551 7.43142 7.63584 8.37090 8.45870 8.79787 8.99637 9.41964 10.88841 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.016633 B = 0.002545 C = 0.002410 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1682.963840 B =10999.090252 C =11617.759816 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.151 4.151 2 C 0.054 3.946 3 O -0.366 6.366 4 C 0.072 3.928 5 H 0.090 0.910 6 C -0.180 4.180 7 C 0.103 3.897 8 O -0.538 6.538 9 C 0.134 3.866 10 N -0.753 5.753 11 C 0.702 3.298 12 O -0.602 6.602 13 N -0.717 5.717 14 C 0.171 3.829 15 C -0.016 4.016 16 C -0.490 4.490 17 H 0.078 0.922 18 C 0.084 3.916 19 N -0.891 5.891 20 Si 0.870 3.130 21 H -0.278 1.278 22 H -0.293 1.293 23 H -0.252 1.252 24 C -0.180 4.180 25 C -0.188 4.188 26 C -0.054 4.054 27 C -0.108 4.108 28 C -0.146 4.146 29 H 0.062 0.938 30 H 0.069 0.931 31 H 0.062 0.938 32 H 0.048 0.952 33 H 0.048 0.952 34 H 0.075 0.925 35 H 0.101 0.899 36 H 0.378 0.622 37 H 0.078 0.922 38 H 0.073 0.927 39 H 0.393 0.607 40 H 0.403 0.597 41 H 0.053 0.947 42 H 0.049 0.951 43 H 0.266 0.734 44 H 0.085 0.915 45 H 0.072 0.928 46 H 0.070 0.930 47 H 0.089 0.911 48 H 0.063 0.937 49 H 0.056 0.944 50 H 0.061 0.939 51 H 0.060 0.940 52 H 0.062 0.938 53 H 0.066 0.934 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -20.946 -5.315 -8.687 23.290 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 -0.208 4.208 2 C -0.023 4.023 3 O -0.285 6.285 4 C 0.013 3.987 5 H 0.108 0.892 6 C -0.218 4.218 7 C 0.061 3.939 8 O -0.344 6.344 9 C 0.009 3.991 10 N -0.411 5.411 11 C 0.402 3.598 12 O -0.482 6.482 13 N -0.370 5.370 14 C 0.047 3.953 15 C -0.017 4.017 16 C -0.527 4.527 17 H 0.096 0.904 18 C -0.120 4.120 19 N -0.527 5.527 20 Si 0.698 3.302 21 H -0.204 1.204 22 H -0.220 1.220 23 H -0.176 1.176 24 C -0.218 4.218 25 C -0.227 4.227 26 C -0.055 4.055 27 C -0.166 4.166 28 C -0.203 4.203 29 H 0.081 0.919 30 H 0.088 0.912 31 H 0.081 0.919 32 H 0.066 0.934 33 H 0.066 0.934 34 H 0.094 0.906 35 H 0.119 0.881 36 H 0.226 0.774 37 H 0.097 0.903 38 H 0.091 0.909 39 H 0.227 0.773 40 H 0.238 0.762 41 H 0.071 0.929 42 H 0.068 0.932 43 H 0.076 0.924 44 H 0.103 0.897 45 H 0.091 0.909 46 H 0.089 0.911 47 H 0.107 0.893 48 H 0.082 0.918 49 H 0.075 0.925 50 H 0.080 0.920 51 H 0.079 0.921 52 H 0.081 0.919 53 H 0.085 0.915 Dipole moment (debyes) X Y Z Total from point charges -20.999 -5.212 -10.123 23.887 hybrid contribution 1.007 -0.185 0.495 1.137 sum -19.992 -5.397 -9.628 22.836 Atomic orbital electron populations 1.21736 0.93776 1.02194 1.03095 1.22520 0.95574 0.84078 1.00089 1.87940 1.19969 1.26009 1.94546 1.23592 0.81555 0.97282 0.96239 0.89222 1.24203 0.99181 1.00495 0.97905 1.22589 0.92181 0.83417 0.95708 1.86550 1.66102 1.26644 1.55067 1.21488 0.88970 1.00452 0.88179 1.44964 1.19274 1.63035 1.13803 1.15944 0.80033 0.79130 0.84711 1.90877 1.72225 1.56035 1.29034 1.44989 1.17085 1.66597 1.08315 1.20962 0.80925 0.96227 0.97147 1.19598 0.99223 0.90760 0.92108 1.20239 1.28424 0.97434 1.06599 0.90408 1.24915 0.95995 0.94342 0.96771 1.69892 1.37541 1.04336 1.40893 0.87005 0.79581 0.80111 0.83497 1.20408 1.21969 1.17606 1.22772 0.97354 1.02190 0.99439 1.23066 0.93140 1.03976 1.02506 1.22187 0.94014 0.95578 0.93693 1.21227 0.96947 0.96186 1.02197 1.21864 1.01001 1.02403 0.95004 0.91893 0.91198 0.91854 0.93389 0.93373 0.90591 0.88051 0.77383 0.90342 0.90901 0.77300 0.76192 0.92856 0.93249 0.92417 0.89688 0.90912 0.91123 0.89254 0.91839 0.92489 0.92014 0.92056 0.91884 0.91498 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 13. 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 -0.95 10.28 37.16 0.38 -0.57 16 2 C 0.05 0.41 6.51 37.16 0.24 0.65 16 3 O -0.37 -3.56 9.45 -35.23 -0.33 -3.89 16 4 C 0.07 0.67 3.35 -25.92 -0.09 0.58 16 5 H 0.09 0.78 7.17 -51.93 -0.37 0.41 16 6 C -0.18 -1.69 6.98 -25.93 -0.18 -1.87 16 7 C 0.10 1.05 1.30 -89.81 -0.12 0.93 16 8 O -0.54 -5.90 12.50 -35.23 -0.44 -6.35 16 9 C 0.13 1.62 3.93 -4.04 -0.02 1.60 16 10 N -0.75 -10.06 5.33 -65.23 -0.35 -10.41 16 11 C 0.70 12.84 8.55 -86.93 -0.74 12.10 16 12 O -0.60 -13.24 16.33 5.29 0.09 -13.15 16 13 N -0.72 -13.45 5.48 -65.23 -0.36 -13.81 16 14 C 0.17 3.66 5.08 -4.04 -0.02 3.64 16 15 C -0.02 -0.34 0.85 -155.66 -0.13 -0.47 16 16 C -0.49 -12.59 9.19 -34.44 -0.32 -12.91 16 17 H 0.08 2.16 8.06 -52.49 -0.42 1.74 16 18 C 0.08 2.28 5.46 -17.82 -0.10 2.18 16 19 N -0.89 -25.80 13.96 55.43 0.77 -25.03 16 20 Si 0.87 21.33 24.69 -169.99 -4.20 17.14 16 21 H -0.28 -6.99 6.95 56.52 0.39 -6.60 16 22 H -0.29 -7.23 7.11 56.52 0.40 -6.83 16 23 H -0.25 -5.86 6.13 56.52 0.35 -5.51 16 24 C -0.18 -3.39 9.96 -26.69 -0.27 -3.65 16 25 C -0.19 -3.79 8.71 -26.69 -0.23 -4.02 16 26 C -0.05 -0.52 1.30 -153.69 -0.20 -0.72 16 27 C -0.11 -1.08 7.92 37.16 0.29 -0.78 16 28 C -0.15 -1.33 8.15 37.16 0.30 -1.02 16 29 H 0.06 0.40 8.14 -51.93 -0.42 -0.02 16 30 H 0.07 0.33 8.14 -51.93 -0.42 -0.09 16 31 H 0.06 0.42 8.14 -51.93 -0.42 -0.01 16 32 H 0.05 0.33 8.14 -51.92 -0.42 -0.09 16 33 H 0.05 0.35 8.14 -51.93 -0.42 -0.07 16 34 H 0.08 0.69 8.10 -51.93 -0.42 0.27 16 35 H 0.10 1.00 7.65 -51.93 -0.40 0.60 16 36 H 0.38 3.39 7.81 45.56 0.36 3.75 16 37 H 0.08 1.07 7.78 -51.93 -0.40 0.67 16 38 H 0.07 0.87 6.87 -51.93 -0.36 0.52 16 39 H 0.39 4.24 7.53 -40.82 -0.31 3.94 16 40 H 0.40 6.96 8.36 -40.82 -0.34 6.62 16 41 H 0.05 1.27 4.24 -51.93 -0.22 1.05 16 42 H 0.05 1.02 8.06 -51.93 -0.42 0.60 16 43 H 0.27 7.34 8.31 -40.82 -0.34 7.00 16 44 H 0.08 1.58 8.14 -51.93 -0.42 1.16 16 45 H 0.07 1.24 8.14 -51.93 -0.42 0.81 16 46 H 0.07 1.32 8.14 -51.93 -0.42 0.89 16 47 H 0.09 1.83 8.14 -51.93 -0.42 1.41 16 48 H 0.06 0.67 7.84 -51.93 -0.41 0.26 16 49 H 0.06 0.53 8.14 -51.93 -0.42 0.10 16 50 H 0.06 0.65 7.19 -51.93 -0.37 0.27 16 51 H 0.06 0.54 6.94 -51.93 -0.36 0.18 16 52 H 0.06 0.51 8.14 -51.93 -0.42 0.09 16 53 H 0.07 0.64 8.14 -51.93 -0.42 0.22 16 LS Contribution 415.05 15.07 6.25 6.25 Total: -1.00 -31.79 415.05 -8.47 -40.25 By element: Atomic # 1 Polarization: 22.06 SS G_CDS: -8.72 Total: 13.34 kcal Atomic # 6 Polarization: -3.16 SS G_CDS: -1.19 Total: -4.35 kcal Atomic # 7 Polarization: -49.31 SS G_CDS: 0.07 Total: -49.24 kcal Atomic # 8 Polarization: -22.70 SS G_CDS: -0.69 Total: -23.39 kcal Atomic # 14 Polarization: 21.33 SS G_CDS: -4.20 Total: 17.14 kcal Total LS contribution 6.25 Total: 6.25 kcal Total: -31.79 -8.47 -40.25 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. ZINC000431116113.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 -41.483 kcal (2) G-P(sol) polarization free energy of solvation -31.787 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -73.270 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.466 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.253 kcal (6) G-S(sol) free energy of system = (1) + (5) -81.736 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.68 seconds