Wall clock time and date at job start Sat Apr 11 2020 06:10:54 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 1.53007 * 1 3 3 O 1.42897 * 109.47193 * 2 1 4 4 C 1.42898 * 114.00407 * 179.97438 * 3 2 1 5 5 H 1.09004 * 109.46784 * 29.99477 * 4 3 2 6 6 C 1.50704 * 109.46960 * 269.99914 * 4 3 2 7 7 O 1.21276 * 119.99992 * 352.29700 * 6 4 3 8 8 N 1.34775 * 119.99768 * 172.30105 * 6 4 3 9 9 C 1.46494 * 119.99966 * 184.78924 * 8 6 4 10 10 C 1.53038 * 109.46313 * 275.06848 * 9 8 6 11 11 C 1.53191 * 109.31353 * 178.60906 * 10 9 8 12 12 N 1.46929 * 108.77446 * 54.64336 * 11 10 9 13 13 C 1.36928 * 120.63663 * 126.41057 * 12 11 10 14 14 H 1.08002 * 119.99785 * 327.42300 * 13 12 11 15 15 C 1.38814 * 120.00097 * 147.42462 * 13 12 11 16 16 N 1.31619 * 119.99769 * 167.36065 * 15 13 12 17 17 Si 1.86800 * 120.00138 * 347.36086 * 15 13 12 18 18 H 1.48496 * 109.46838 * 86.04288 * 17 15 13 19 19 H 1.48497 * 109.46903 * 206.04520 * 17 15 13 20 20 H 1.48500 * 109.46819 * 326.04399 * 17 15 13 21 21 C 1.46928 * 118.73231 * 306.38703 * 12 11 10 22 22 C 1.53035 * 109.46285 * 154.99836 * 9 8 6 23 23 C 1.52999 * 109.47370 * 149.99556 * 4 3 2 24 24 C 1.53172 * 109.61812 * 297.21105 * 23 4 3 25 25 C 1.53088 * 109.16653 * 176.89069 * 24 23 4 26 26 O 1.42903 * 109.41621 * 302.39258 * 25 24 23 27 27 C 1.42910 * 114.09693 * 61.15496 * 26 25 24 28 28 C 1.53089 * 109.41329 * 298.84653 * 27 26 25 29 29 H 1.09001 * 109.46872 * 180.02562 * 1 2 3 30 30 H 1.09001 * 109.47084 * 300.00376 * 1 2 3 31 31 H 1.09007 * 109.46583 * 60.00270 * 1 2 3 32 32 H 1.08991 * 109.47596 * 239.99677 * 2 1 3 33 33 H 1.09006 * 109.46564 * 119.99182 * 2 1 3 34 34 H 0.97005 * 120.00017 * 4.79478 * 8 6 4 35 35 H 1.09003 * 109.45955 * 35.02824 * 9 8 6 36 36 H 1.08991 * 109.49837 * 298.56803 * 10 9 8 37 37 H 1.09000 * 109.49699 * 58.66381 * 10 9 8 38 38 H 1.08994 * 109.59440 * 294.85062 * 11 10 9 39 39 H 1.09010 * 109.70323 * 174.48994 * 11 10 9 40 40 H 0.97004 * 119.99909 * 180.02562 * 16 15 13 41 41 H 1.09009 * 109.58914 * 293.82017 * 21 12 11 42 42 H 1.09001 * 109.70281 * 173.47288 * 21 12 11 43 43 H 1.08998 * 109.50196 * 301.33968 * 22 9 8 44 44 H 1.08999 * 109.49545 * 61.43501 * 22 9 8 45 45 H 1.09006 * 109.54237 * 176.99022 * 23 4 3 46 46 H 1.09001 * 109.52180 * 296.80102 * 24 23 4 47 47 H 1.09003 * 109.52429 * 56.98311 * 24 23 4 48 48 H 1.09003 * 109.48352 * 182.40770 * 25 24 23 49 49 H 1.09010 * 109.47736 * 62.37588 * 25 24 23 50 50 H 1.08995 * 109.47919 * 178.86272 * 27 26 25 51 51 H 1.09001 * 109.47651 * 58.82275 * 27 26 25 52 52 H 1.09006 * 109.52098 * 297.69709 * 28 27 26 53 53 H 1.09000 * 109.52315 * 177.51988 * 28 27 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 1.5301 0.0000 0.0000 3 8 2.0064 1.3472 0.0000 4 6 3.4309 1.4602 0.0006 5 1 3.8636 0.6015 -0.5129 6 6 3.9311 1.5001 1.4217 7 8 3.1428 1.5790 2.3399 8 7 5.2543 1.4482 1.6720 9 6 5.7363 1.3810 3.0537 10 6 5.8299 2.7955 3.6304 11 6 6.3009 2.7190 5.0861 12 7 7.5594 1.9623 5.1368 13 6 8.6689 2.4929 5.7388 14 1 8.8404 3.5589 5.7113 15 6 9.5731 1.6608 6.3844 16 7 10.7519 2.1229 6.7439 17 14 9.1170 -0.1148 6.7431 18 1 9.4372 -0.9562 5.5622 19 1 9.8876 -0.5962 7.9176 20 1 7.6636 -0.2032 7.0345 21 6 7.6044 0.6251 4.5297 22 6 7.1187 0.7250 3.0803 23 6 3.8410 2.7456 -0.7208 24 6 3.3949 2.6786 -2.1846 25 6 3.7407 3.9997 -2.8764 26 8 3.1098 5.0783 -2.1831 27 6 3.5241 5.2192 -0.8226 28 6 3.1696 3.9470 -0.0484 29 1 -0.3633 -1.0277 0.0005 30 1 -0.3633 0.5139 0.8900 31 1 -0.3633 0.5138 -0.8901 32 1 1.8935 -0.5138 -0.8899 33 1 1.8933 -0.5137 0.8901 34 1 5.8876 1.4553 0.9372 35 1 5.0425 0.7904 3.6520 36 1 6.5422 3.3795 3.0477 37 1 4.8498 3.2706 3.5898 38 1 5.5461 2.2136 5.6884 39 1 6.4638 3.7250 5.4731 40 1 11.3840 1.5414 7.1947 41 1 6.9558 -0.0512 5.0866 42 1 8.6269 0.2478 4.5473 43 1 7.0559 -0.2736 2.6480 44 1 7.8189 1.3285 2.5027 45 1 4.9240 2.8601 -0.6745 46 1 3.9107 1.8592 -2.6854 47 1 2.3183 2.5144 -2.2302 48 1 3.3871 3.9738 -3.9071 49 1 4.8212 4.1435 -2.8661 50 1 3.0143 6.0718 -0.3739 51 1 4.6017 5.3789 -0.7855 52 1 2.0884 3.8085 -0.0507 53 1 3.5241 4.0349 0.9786 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 ZINC001228493559.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 06:10:54 Heat of formation + Delta-G solvation = -118.012121 kcal Electronic energy + Delta-G solvation = -31762.007356 eV Core-core repulsion = 27633.927708 eV Total energy + Delta-G solvation = -4128.079648 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.90 seconds Orbital eigenvalues (eV) -40.68426 -39.25385 -38.20295 -37.19739 -34.77874 -34.40158 -32.20552 -31.41671 -31.29931 -30.49547 -30.27321 -28.01639 -25.09742 -23.95621 -23.72028 -23.04849 -22.94273 -21.82695 -20.66240 -20.08734 -19.68475 -17.69584 -17.22382 -16.73101 -16.59033 -16.16530 -15.88742 -15.45202 -15.20582 -14.98938 -14.85353 -14.54354 -14.19329 -14.09523 -14.00155 -13.85267 -13.41332 -13.12945 -12.94866 -12.72732 -12.56423 -12.42764 -12.22637 -12.12039 -12.02470 -11.82918 -11.55930 -11.52409 -11.37070 -11.03995 -10.98845 -10.90052 -10.59110 -10.50852 -10.47886 -10.30558 -10.14320 -9.85469 -9.79646 -9.54632 -9.24096 -8.87188 -8.65752 -6.94959 -5.96990 -3.41177 2.56615 2.98298 3.25668 3.44236 3.45459 3.47483 3.63258 4.25532 4.29785 4.48273 4.50025 4.67941 4.69195 4.78073 4.86063 4.94419 4.96208 4.99883 5.10746 5.14132 5.14759 5.21164 5.27609 5.32716 5.35906 5.38223 5.41957 5.45444 5.60665 5.61330 5.68221 5.76250 5.77929 5.87512 5.90117 5.99582 6.05150 6.11687 6.14957 6.28303 6.36866 6.52354 6.60504 6.62527 6.68415 6.81996 6.88811 6.94183 7.54440 7.98194 8.23918 8.32042 8.90851 9.67785 10.07193 11.19170 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.015305 B = 0.002843 C = 0.002564 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1829.081667 B = 9847.762797 C =10916.281547 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.148 4.148 2 C 0.055 3.945 3 O -0.349 6.349 4 C 0.081 3.919 5 H 0.083 0.917 6 C 0.488 3.512 7 O -0.521 6.521 8 N -0.724 5.724 9 C 0.152 3.848 10 C -0.140 4.140 11 C 0.151 3.849 12 N -0.607 5.607 13 C -0.260 4.260 14 H 0.085 0.915 15 C 0.024 3.976 16 N -0.914 5.914 17 Si 0.893 3.107 18 H -0.287 1.287 19 H -0.304 1.304 20 H -0.271 1.271 21 C 0.124 3.876 22 C -0.140 4.140 23 C -0.079 4.079 24 C -0.148 4.148 25 C 0.061 3.939 26 O -0.383 6.383 27 C 0.061 3.939 28 C -0.147 4.147 29 H 0.069 0.931 30 H 0.066 0.934 31 H 0.062 0.938 32 H 0.047 0.953 33 H 0.050 0.950 34 H 0.395 0.605 35 H 0.080 0.920 36 H 0.062 0.938 37 H 0.059 0.941 38 H 0.025 0.975 39 H 0.066 0.934 40 H 0.263 0.737 41 H 0.027 0.973 42 H 0.078 0.922 43 H 0.058 0.942 44 H 0.070 0.930 45 H 0.086 0.914 46 H 0.072 0.928 47 H 0.083 0.917 48 H 0.093 0.907 49 H 0.050 0.950 50 H 0.095 0.905 51 H 0.050 0.950 52 H 0.085 0.915 53 H 0.075 0.925 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -16.037 -2.254 -21.110 26.606 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 -0.205 4.205 2 C -0.022 4.022 3 O -0.267 6.267 4 C 0.019 3.981 5 H 0.101 0.899 6 C 0.273 3.727 7 O -0.396 6.396 8 N -0.377 5.377 9 C 0.048 3.952 10 C -0.180 4.180 11 C 0.024 3.976 12 N -0.331 5.331 13 C -0.389 4.389 14 H 0.102 0.898 15 C -0.175 4.175 16 N -0.557 5.557 17 Si 0.724 3.276 18 H -0.215 1.215 19 H -0.232 1.232 20 H -0.196 1.196 21 C -0.002 4.002 22 C -0.180 4.180 23 C -0.098 4.098 24 C -0.186 4.186 25 C -0.015 4.015 26 O -0.302 6.302 27 C -0.015 4.015 28 C -0.185 4.185 29 H 0.088 0.912 30 H 0.085 0.915 31 H 0.081 0.919 32 H 0.065 0.935 33 H 0.068 0.932 34 H 0.229 0.771 35 H 0.098 0.902 36 H 0.081 0.919 37 H 0.078 0.922 38 H 0.042 0.958 39 H 0.085 0.915 40 H 0.073 0.927 41 H 0.045 0.955 42 H 0.096 0.904 43 H 0.076 0.924 44 H 0.088 0.912 45 H 0.104 0.896 46 H 0.091 0.909 47 H 0.101 0.899 48 H 0.111 0.889 49 H 0.068 0.932 50 H 0.113 0.887 51 H 0.069 0.931 52 H 0.103 0.897 53 H 0.093 0.907 Dipole moment (debyes) X Y Z Total from point charges -16.740 -1.952 -20.408 26.467 hybrid contribution 0.676 -1.597 0.081 1.736 sum -16.064 -3.550 -20.326 26.149 Atomic orbital electron populations 1.21702 0.93414 1.02183 1.03243 1.22571 0.96011 0.83648 0.99924 1.87995 1.17899 1.26420 1.94363 1.22029 0.83861 0.99543 0.92686 0.89933 1.21242 0.82794 0.76796 0.91867 1.90720 1.55159 1.47716 1.46052 1.46351 1.06657 1.75028 1.09635 1.20982 0.95582 0.97633 0.80964 1.22362 1.00612 0.95768 0.99286 1.20909 0.87614 0.96653 0.92385 1.44367 1.08453 1.15385 1.64931 1.18923 0.97744 0.94328 1.27901 0.89752 1.25416 0.96431 0.98184 0.97494 1.69763 1.06211 1.36321 1.43391 0.86871 0.78431 0.85652 0.76646 1.21465 1.23207 1.19578 1.21405 1.00194 0.88449 0.90135 1.22338 0.95271 0.99590 1.00763 1.21290 1.00250 0.93196 0.95072 1.22216 1.03515 0.98443 0.94418 1.22555 0.96958 0.85973 0.96058 1.87938 1.67312 1.50819 1.24111 1.22611 0.99313 0.97751 0.81869 1.22162 1.02933 0.93815 0.99581 0.91172 0.91536 0.91935 0.93514 0.93153 0.77137 0.90152 0.91917 0.92200 0.95750 0.91540 0.92690 0.95498 0.90376 0.92368 0.91159 0.89573 0.90935 0.89875 0.88863 0.93189 0.88684 0.93130 0.89658 0.90654 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 -0.15 -1.21 10.28 37.16 0.38 -0.83 16 2 C 0.05 0.52 6.46 37.16 0.24 0.76 16 3 O -0.35 -3.98 8.09 -55.02 -0.45 -4.42 16 4 C 0.08 0.81 2.23 -27.88 -0.06 0.74 16 5 H 0.08 0.64 7.79 -51.93 -0.40 0.23 16 6 C 0.49 6.45 6.02 -10.98 -0.07 6.39 16 7 O -0.52 -9.13 16.18 -14.23 -0.23 -9.36 16 8 N -0.72 -8.88 5.07 -53.77 -0.27 -9.15 16 9 C 0.15 2.37 2.38 -67.90 -0.16 2.21 16 10 C -0.14 -2.36 5.65 -26.61 -0.15 -2.51 16 11 C 0.15 3.03 6.52 -3.71 -0.02 3.00 16 12 N -0.61 -14.22 2.73 -172.31 -0.47 -14.69 16 13 C -0.26 -7.20 10.05 -15.06 -0.15 -7.36 16 14 H 0.08 2.50 8.06 -52.49 -0.42 2.08 16 15 C 0.02 0.68 5.34 -17.43 -0.09 0.59 16 16 N -0.91 -27.83 13.97 55.49 0.78 -27.06 16 17 Si 0.89 22.30 24.25 -169.99 -4.12 18.17 16 18 H -0.29 -6.77 6.42 56.52 0.36 -6.41 16 19 H -0.30 -7.74 7.11 56.52 0.40 -7.34 16 20 H -0.27 -6.70 6.61 56.52 0.37 -6.32 16 21 C 0.12 2.62 4.15 -3.71 -0.02 2.60 16 22 C -0.14 -2.27 5.55 -26.61 -0.15 -2.42 16 23 C -0.08 -0.68 2.11 -90.44 -0.19 -0.88 16 24 C -0.15 -1.08 5.34 -26.60 -0.14 -1.22 16 25 C 0.06 0.46 6.84 37.20 0.25 0.72 16 26 O -0.38 -3.95 10.77 -35.23 -0.38 -4.33 16 27 C 0.06 0.57 6.84 37.20 0.25 0.83 16 28 C -0.15 -1.52 5.02 -26.60 -0.13 -1.66 16 29 H 0.07 0.45 8.14 -51.93 -0.42 0.02 16 30 H 0.07 0.63 8.14 -51.93 -0.42 0.21 16 31 H 0.06 0.48 8.14 -51.92 -0.42 0.05 16 32 H 0.05 0.35 8.08 -51.93 -0.42 -0.07 16 33 H 0.05 0.54 8.14 -51.93 -0.42 0.12 16 34 H 0.40 3.72 8.40 -40.82 -0.34 3.38 16 35 H 0.08 1.42 7.65 -51.93 -0.40 1.02 16 36 H 0.06 1.06 8.14 -51.93 -0.42 0.63 16 37 H 0.06 1.00 8.09 -51.93 -0.42 0.58 16 38 H 0.02 0.49 8.14 -51.93 -0.42 0.07 16 39 H 0.07 1.34 7.93 -51.92 -0.41 0.92 16 40 H 0.26 7.61 8.31 -40.82 -0.34 7.27 16 41 H 0.03 0.57 6.93 -51.92 -0.36 0.21 16 42 H 0.08 1.78 4.48 -51.93 -0.23 1.55 16 43 H 0.06 0.82 8.14 -51.93 -0.42 0.39 16 44 H 0.07 1.13 8.14 -51.93 -0.42 0.71 16 45 H 0.09 0.65 7.94 -51.93 -0.41 0.23 16 46 H 0.07 0.40 8.14 -51.93 -0.42 -0.03 16 47 H 0.08 0.71 7.69 -51.93 -0.40 0.31 16 48 H 0.09 0.57 8.14 -51.93 -0.42 0.15 16 49 H 0.05 0.33 8.14 -51.92 -0.42 -0.09 16 50 H 0.10 0.83 8.14 -51.93 -0.42 0.40 16 51 H 0.05 0.44 8.14 -51.93 -0.42 0.01 16 52 H 0.08 1.02 7.52 -51.93 -0.39 0.63 16 53 H 0.07 0.90 7.44 -51.93 -0.39 0.51 16 LS Contribution 404.15 15.07 6.09 6.09 Total: -1.00 -33.38 404.15 -8.96 -42.34 By element: Atomic # 1 Polarization: 11.15 SS G_CDS: -9.70 Total: 1.45 kcal Atomic # 6 Polarization: 1.17 SS G_CDS: -0.21 Total: 0.96 kcal Atomic # 7 Polarization: -50.94 SS G_CDS: 0.03 Total: -50.90 kcal Atomic # 8 Polarization: -17.06 SS G_CDS: -1.05 Total: -18.11 kcal Atomic # 14 Polarization: 22.30 SS G_CDS: -4.12 Total: 18.17 kcal Total LS contribution 6.09 Total: 6.09 kcal Total: -33.38 -8.96 -42.34 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. ZINC001228493559.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 -75.673 kcal (2) G-P(sol) polarization free energy of solvation -33.380 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -109.053 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.959 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.339 kcal (6) G-S(sol) free energy of system = (1) + (5) -118.012 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.90 seconds