Wall clock time and date at job start Sat Apr 11 2020 06:11:59 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 1.52995 * 1 3 3 C 1.53001 * 109.47229 * 2 1 4 4 C 1.52995 * 109.47229 * 180.02562 * 3 2 1 5 5 C 1.53001 * 109.47229 * 180.02562 * 4 3 2 6 6 H 1.08994 * 109.46844 * 54.99726 * 5 4 3 7 7 N 1.46504 * 109.46959 * 295.00378 * 5 4 3 8 8 C 1.34777 * 119.99854 * 299.99365 * 7 5 4 9 9 N 1.34773 * 120.00097 * 180.27545 * 8 7 5 10 10 O 1.21593 * 119.99953 * 0.02562 * 8 7 5 11 11 C 1.50699 * 109.47323 * 175.00145 * 5 4 3 12 12 O 1.21277 * 120.00157 * 99.99742 * 11 5 4 13 13 N 1.34773 * 120.00154 * 279.99922 * 11 5 4 14 14 C 1.48118 * 127.03121 * 359.68684 * 13 11 5 15 15 C 1.54602 * 103.42403 * 219.28604 * 14 13 11 16 16 C 1.54613 * 102.90679 * 322.86771 * 15 14 13 17 17 C 1.53004 * 110.32583 * 262.80587 * 16 15 14 18 18 C 1.52997 * 110.32733 * 140.59402 * 16 15 14 19 19 N 1.46496 * 109.47337 * 64.37526 * 18 16 15 20 20 C 1.36942 * 120.00210 * 180.02562 * 19 18 16 21 21 H 1.07996 * 119.99729 * 359.97438 * 20 19 18 22 22 C 1.38812 * 120.00083 * 179.97438 * 20 19 18 23 23 N 1.31622 * 120.00000 * 359.97438 * 22 20 19 24 24 Si 1.86800 * 119.99889 * 179.97438 * 22 20 19 25 25 H 1.48502 * 109.47063 * 90.00072 * 24 22 20 26 26 H 1.48499 * 109.47199 * 209.99975 * 24 22 20 27 27 H 1.48494 * 109.47288 * 330.00233 * 24 22 20 28 28 C 1.47479 * 127.03823 * 179.97438 * 13 11 5 29 29 H 1.09006 * 109.47174 * 179.97438 * 1 2 3 30 30 H 1.08994 * 109.47231 * 299.99677 * 1 2 3 31 31 H 1.08998 * 109.47393 * 60.00168 * 1 2 3 32 32 H 1.09000 * 109.47439 * 239.99938 * 2 1 3 33 33 H 1.09004 * 109.47612 * 120.00236 * 2 1 3 34 34 H 1.09000 * 109.46961 * 59.99645 * 3 2 1 35 35 H 1.08998 * 109.46796 * 300.00198 * 3 2 1 36 36 H 1.09008 * 109.47307 * 60.00246 * 4 3 2 37 37 H 1.08998 * 109.47393 * 299.99832 * 4 3 2 38 38 H 0.97000 * 120.00410 * 120.00091 * 7 5 4 39 39 H 0.96998 * 120.00525 * 179.72346 * 9 8 7 40 40 H 0.97000 * 120.00112 * 359.73180 * 9 8 7 41 41 H 1.08998 * 110.66430 * 337.76566 * 14 13 11 42 42 H 1.08999 * 110.66344 * 100.88619 * 14 13 11 43 43 H 1.08997 * 110.83333 * 204.44493 * 15 14 13 44 44 H 1.08999 * 110.72897 * 81.24045 * 15 14 13 45 45 H 1.09003 * 109.47126 * 175.62376 * 17 16 15 46 46 H 1.09001 * 109.47312 * 295.62056 * 17 16 15 47 47 H 1.08998 * 109.47509 * 55.62374 * 17 16 15 48 48 H 1.09006 * 109.47609 * 184.37873 * 18 16 15 49 49 H 1.09002 * 109.47029 * 304.37560 * 18 16 15 50 50 H 0.97003 * 119.99971 * 0.02562 * 19 18 16 51 51 H 0.97002 * 119.99859 * 179.97438 * 23 22 20 52 52 H 1.09000 * 109.91761 * 273.88003 * 28 13 11 53 53 H 1.09000 * 109.91125 * 34.96479 * 28 13 11 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 6 3.5699 1.4425 -0.0006 5 6 4.0800 2.8850 0.0000 6 1 3.6457 3.4235 0.8423 7 7 3.6918 3.5407 -1.2513 8 6 4.1158 3.0461 -2.4311 9 7 3.7634 3.6525 -3.5819 10 8 4.8202 2.0553 -2.4569 11 6 5.5819 2.8868 0.1232 12 8 6.2710 3.0403 -0.8629 13 7 6.1594 2.7177 1.3291 14 6 5.4732 2.5249 2.6275 15 6 6.3307 3.3520 3.6129 16 6 7.7697 3.1200 3.0972 17 6 8.4492 2.0086 3.8998 18 6 8.5814 4.4138 3.1865 19 7 8.7279 4.8024 4.5914 20 6 9.4213 5.9369 4.9193 21 1 9.8605 6.5448 4.1422 22 6 9.5598 6.3053 6.2504 23 7 9.0241 5.5646 7.1974 24 14 10.5062 7.8524 6.6977 25 1 9.5758 9.0093 6.7324 26 1 11.1326 7.6808 8.0332 27 1 11.5627 8.0971 5.6833 28 6 7.6036 2.6926 1.6268 29 1 -0.3634 -1.0277 -0.0005 30 1 -0.3633 0.5138 0.8900 31 1 -0.3634 0.5138 -0.8900 32 1 1.8933 -0.5138 -0.8900 33 1 1.8934 -0.5139 0.8900 34 1 1.6766 1.9563 0.8900 35 1 1.6766 1.9563 -0.8900 36 1 3.9330 0.9288 -0.8909 37 1 3.9337 0.9286 0.8891 38 1 3.1297 4.3310 -1.2307 39 1 4.0718 3.2988 -4.4308 40 1 3.2012 4.4427 -3.5613 41 1 4.4553 2.9125 2.5860 42 1 5.4739 1.4722 2.9104 43 1 6.2205 2.9782 4.6308 44 1 6.0675 4.4084 3.5605 45 1 9.4322 1.8032 3.4758 46 1 8.5598 2.3250 4.9370 47 1 7.8399 1.1058 3.8583 48 1 9.5670 4.2556 2.7485 49 1 8.0650 5.2049 2.6427 50 1 8.3338 4.2561 5.2893 51 1 9.1212 5.8219 8.1277 52 1 7.9942 1.6846 1.4866 53 1 8.1295 3.3885 0.9732 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 ZINC001569696154.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 06:11:59 Heat of formation + Delta-G solvation = -64.594089 kcal Electronic energy + Delta-G solvation = -31186.219479 eV Core-core repulsion = 27092.748962 eV Total energy + Delta-G solvation = -4093.470517 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.68 seconds Orbital eigenvalues (eV) -40.76527 -39.50345 -37.79031 -36.38407 -34.76015 -34.35018 -33.63198 -32.66701 -30.75903 -30.17716 -29.35433 -27.59805 -26.13379 -25.16988 -23.35483 -22.79899 -22.36818 -21.68432 -20.83237 -19.16721 -18.81183 -18.60757 -17.37371 -17.16542 -16.60027 -16.08026 -15.83249 -15.47162 -14.90743 -14.60868 -14.47198 -14.25063 -14.07137 -14.06530 -13.78702 -13.54940 -13.40267 -13.18263 -12.91424 -12.63016 -12.52948 -12.35657 -12.11256 -11.90362 -11.66102 -11.51623 -11.37459 -11.30765 -11.14887 -10.99078 -10.85745 -10.81268 -10.57057 -10.28518 -10.23384 -10.21373 -9.90031 -9.83831 -9.66312 -9.65007 -8.94914 -8.86494 -8.49989 -6.90366 -5.76587 -3.04090 2.54728 2.82398 3.08823 3.37515 3.43695 3.49367 3.50852 4.27515 4.36290 4.56318 4.61662 4.63239 4.73587 4.79032 4.83911 4.99447 5.04894 5.13684 5.16302 5.35845 5.43837 5.44906 5.48281 5.51657 5.57978 5.61949 5.63116 5.79084 5.79583 5.91400 5.94781 5.99873 6.02457 6.07201 6.11489 6.13532 6.26457 6.28033 6.41585 6.46316 6.53893 6.54890 6.70150 6.81821 6.82205 6.90506 7.68641 7.71638 7.84542 8.33277 8.43103 8.66349 9.54582 10.12240 10.47839 11.46446 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.015442 B = 0.002428 C = 0.002276 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1812.747529 B =11529.708546 C =12297.821962 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.152 4.152 2 C -0.125 4.125 3 C -0.112 4.112 4 C -0.134 4.134 5 C 0.159 3.841 6 H 0.108 0.892 7 N -0.733 5.733 8 C 0.711 3.289 9 N -0.872 5.872 10 O -0.564 6.564 11 C 0.517 3.483 12 O -0.510 6.510 13 N -0.619 5.619 14 C 0.097 3.903 15 C -0.119 4.119 16 C -0.079 4.079 17 C -0.132 4.132 18 C 0.167 3.833 19 N -0.728 5.728 20 C -0.236 4.236 21 H 0.069 0.931 22 C -0.014 4.014 23 N -0.935 5.935 24 Si 0.906 3.094 25 H -0.291 1.291 26 H -0.292 1.292 27 H -0.282 1.282 28 C 0.120 3.880 29 H 0.052 0.948 30 H 0.054 0.946 31 H 0.051 0.949 32 H 0.061 0.939 33 H 0.062 0.938 34 H 0.061 0.939 35 H 0.061 0.939 36 H 0.095 0.905 37 H 0.074 0.926 38 H 0.399 0.601 39 H 0.413 0.587 40 H 0.392 0.608 41 H 0.075 0.925 42 H 0.072 0.928 43 H 0.084 0.916 44 H 0.079 0.921 45 H 0.054 0.946 46 H 0.072 0.928 47 H 0.047 0.953 48 H 0.020 0.980 49 H 0.019 0.981 50 H 0.385 0.615 51 H 0.254 0.746 52 H 0.064 0.936 53 H 0.075 0.925 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -19.365 -8.982 -15.831 26.577 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 -0.209 4.209 2 C -0.162 4.162 3 C -0.149 4.149 4 C -0.173 4.173 5 C 0.049 3.951 6 H 0.125 0.875 7 N -0.390 5.390 8 C 0.409 3.591 9 N -0.440 5.440 10 O -0.438 6.438 11 C 0.303 3.697 12 O -0.384 6.384 13 N -0.355 5.355 14 C -0.026 4.026 15 C -0.157 4.157 16 C -0.080 4.080 17 C -0.190 4.190 18 C 0.040 3.960 19 N -0.373 5.373 20 C -0.367 4.367 21 H 0.087 0.913 22 C -0.210 4.210 23 N -0.584 5.584 24 Si 0.737 3.263 25 H -0.218 1.218 26 H -0.218 1.218 27 H -0.208 1.208 28 C -0.004 4.004 29 H 0.071 0.929 30 H 0.073 0.927 31 H 0.070 0.930 32 H 0.079 0.921 33 H 0.081 0.919 34 H 0.080 0.920 35 H 0.080 0.920 36 H 0.113 0.887 37 H 0.093 0.907 38 H 0.232 0.768 39 H 0.244 0.756 40 H 0.219 0.781 41 H 0.093 0.907 42 H 0.090 0.910 43 H 0.103 0.897 44 H 0.098 0.902 45 H 0.073 0.927 46 H 0.091 0.909 47 H 0.066 0.934 48 H 0.038 0.962 49 H 0.037 0.963 50 H 0.219 0.781 51 H 0.064 0.936 52 H 0.082 0.918 53 H 0.093 0.907 Dipole moment (debyes) X Y Z Total from point charges -18.312 -9.615 -16.354 26.368 hybrid contribution 0.046 1.464 0.334 1.503 sum -18.266 -8.151 -16.020 25.627 Atomic orbital electron populations 1.21765 0.95937 1.01527 1.01664 1.21512 0.95684 0.96846 1.02200 1.21546 0.94483 0.97006 1.01906 1.21999 0.95974 0.94423 1.04872 1.20657 0.91960 0.96054 0.86395 0.87457 1.44697 1.56656 1.33393 1.04211 1.15831 0.79520 0.83203 0.80502 1.42968 1.58882 1.34382 1.07804 1.90966 1.39989 1.27058 1.85823 1.20456 0.90374 0.77194 0.81691 1.90759 1.64343 1.47718 1.35551 1.48810 1.08070 1.72139 1.06510 1.22591 0.96665 1.00277 0.83038 1.22707 0.93522 1.00904 0.98541 1.21642 0.95888 0.97393 0.93069 1.21811 0.99627 0.96223 1.01322 1.20692 0.95657 0.91352 0.88337 1.42358 1.65304 1.28834 1.00825 1.19234 1.25687 1.00269 0.91558 0.91316 1.24706 1.01484 0.99115 0.95702 1.69651 1.49866 1.39505 0.99342 0.86200 0.79511 0.83059 0.77504 1.21811 1.21805 1.20819 1.22095 0.81091 1.01242 0.95924 0.92869 0.92723 0.92951 0.92057 0.91902 0.92006 0.92012 0.88673 0.90718 0.76778 0.75568 0.78051 0.90656 0.90999 0.89729 0.90226 0.92707 0.90875 0.93433 0.96218 0.96330 0.78073 0.93577 0.91768 0.90663 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 -0.94 9.91 37.16 0.37 -0.57 16 2 C -0.12 -0.90 5.93 -26.73 -0.16 -1.06 16 3 C -0.11 -0.81 5.10 -26.73 -0.14 -0.95 16 4 C -0.13 -1.30 4.54 -26.73 -0.12 -1.42 16 5 C 0.16 1.65 2.42 -69.08 -0.17 1.48 16 6 H 0.11 0.83 6.91 -51.93 -0.36 0.47 16 7 N -0.73 -6.85 4.66 -59.81 -0.28 -7.13 16 8 C 0.71 8.53 7.59 -86.92 -0.66 7.87 16 9 N -0.87 -6.62 8.88 27.63 0.25 -6.37 16 10 O -0.56 -9.54 13.03 -18.20 -0.24 -9.78 16 11 C 0.52 7.69 6.88 -10.99 -0.08 7.62 16 12 O -0.51 -9.87 14.01 -17.93 -0.25 -10.12 16 13 N -0.62 -8.57 3.29 -169.97 -0.56 -9.12 16 14 C 0.10 1.07 6.56 -2.31 -0.02 1.06 16 15 C -0.12 -1.66 5.72 -25.04 -0.14 -1.80 16 16 C -0.08 -1.24 0.67 -153.13 -0.10 -1.34 16 17 C -0.13 -2.01 8.05 37.16 0.30 -1.71 16 18 C 0.17 3.38 4.85 -4.05 -0.02 3.36 16 19 N -0.73 -17.90 5.12 -59.91 -0.31 -18.20 16 20 C -0.24 -6.56 9.99 -15.06 -0.15 -6.72 16 21 H 0.07 1.88 7.83 -52.49 -0.41 1.47 16 22 C -0.01 -0.41 5.50 -17.43 -0.10 -0.51 16 23 N -0.93 -27.74 13.06 55.49 0.72 -27.01 16 24 Si 0.91 22.39 29.55 -169.99 -5.02 17.36 16 25 H -0.29 -7.15 7.11 56.52 0.40 -6.75 16 26 H -0.29 -7.25 7.11 56.52 0.40 -6.85 16 27 H -0.28 -6.85 7.11 56.52 0.40 -6.45 16 28 C 0.12 1.82 6.28 -2.97 -0.02 1.80 16 29 H 0.05 0.31 8.14 -51.93 -0.42 -0.11 16 30 H 0.05 0.31 8.14 -51.93 -0.42 -0.11 16 31 H 0.05 0.31 8.14 -51.93 -0.42 -0.11 16 32 H 0.06 0.50 8.14 -51.93 -0.42 0.07 16 33 H 0.06 0.44 8.14 -51.93 -0.42 0.02 16 34 H 0.06 0.38 8.14 -51.93 -0.42 -0.04 16 35 H 0.06 0.46 7.75 -51.93 -0.40 0.06 16 36 H 0.09 1.24 6.04 -51.92 -0.31 0.93 16 37 H 0.07 0.69 7.78 -51.93 -0.40 0.28 16 38 H 0.40 2.33 8.84 -40.82 -0.36 1.97 16 39 H 0.41 2.89 8.93 -40.82 -0.36 2.52 16 40 H 0.39 1.62 8.84 -40.82 -0.36 1.26 16 41 H 0.08 0.64 6.67 -51.93 -0.35 0.30 16 42 H 0.07 0.70 8.14 -51.93 -0.42 0.28 16 43 H 0.08 1.17 7.85 -51.93 -0.41 0.76 16 44 H 0.08 1.26 7.84 -51.93 -0.41 0.85 16 45 H 0.05 0.83 8.14 -51.93 -0.42 0.40 16 46 H 0.07 1.28 6.75 -51.93 -0.35 0.93 16 47 H 0.05 0.60 8.14 -51.93 -0.42 0.18 16 48 H 0.02 0.42 8.14 -51.93 -0.42 -0.01 16 49 H 0.02 0.40 8.11 -51.93 -0.42 -0.02 16 50 H 0.38 9.72 6.18 -40.82 -0.25 9.46 16 51 H 0.25 7.33 8.31 -40.82 -0.34 6.99 16 52 H 0.06 0.94 7.68 -51.93 -0.40 0.54 16 53 H 0.07 1.28 7.60 -51.93 -0.39 0.89 16 LS Contribution 414.27 15.07 6.24 6.24 Total: -1.00 -36.88 414.27 -9.96 -46.84 By element: Atomic # 1 Polarization: 19.50 SS G_CDS: -9.32 Total: 10.18 kcal Atomic # 6 Polarization: 8.31 SS G_CDS: -1.20 Total: 7.11 kcal Atomic # 7 Polarization: -67.67 SS G_CDS: -0.18 Total: -67.84 kcal Atomic # 8 Polarization: -19.41 SS G_CDS: -0.49 Total: -19.90 kcal Atomic # 14 Polarization: 22.39 SS G_CDS: -5.02 Total: 17.36 kcal Total LS contribution 6.24 Total: 6.24 kcal Total: -36.88 -9.96 -46.84 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. ZINC001569696154.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 -17.750 kcal (2) G-P(sol) polarization free energy of solvation -36.885 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -54.634 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.960 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -46.844 kcal (6) G-S(sol) free energy of system = (1) + (5) -64.594 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.68 seconds