Wall clock time and date at job start Sat Apr 11 2020 06:10:12 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 1.53002 * 1 3 3 C 1.52993 * 109.46855 * 2 1 4 4 C 1.53001 * 109.47416 * 120.00142 * 2 1 3 5 5 H 1.08995 * 109.47208 * 178.55399 * 4 2 1 6 6 N 1.46901 * 109.46903 * 58.55557 * 4 2 1 7 7 C 1.46903 * 110.99745 * 100.73122 * 6 4 2 8 8 C 1.53178 * 109.54116 * 274.51754 * 7 6 4 9 9 C 1.53099 * 109.15775 * 183.15481 * 8 7 6 10 10 O 1.42899 * 109.41363 * 57.61112 * 9 8 7 11 11 C 1.42896 * 114.10063 * 298.83438 * 10 9 8 12 12 C 1.53098 * 109.41061 * 61.16318 * 11 10 9 13 13 C 1.50694 * 109.46900 * 298.55784 * 4 2 1 14 14 O 1.21278 * 120.00535 * 82.16457 * 13 4 2 15 15 N 1.34783 * 120.00089 * 262.15807 * 13 4 2 16 16 C 1.47023 * 125.64618 * 4.19486 * 15 13 4 17 17 C 1.54362 * 107.28990 * 181.12410 * 16 15 13 18 18 C 1.55162 * 102.92080 * 22.13964 * 17 16 15 19 19 O 1.42897 * 111.00316 * 82.63806 * 18 17 16 20 20 C 1.50699 * 111.00392 * 206.45243 * 18 17 16 21 21 H 1.08007 * 119.99887 * 120.43489 * 20 18 17 22 22 C 1.37876 * 120.00000 * 300.16298 * 20 18 17 23 23 N 1.31518 * 119.99924 * 355.10402 * 22 20 18 24 24 Si 1.86797 * 119.99947 * 175.11167 * 22 20 18 25 25 H 1.48500 * 109.47737 * 94.98929 * 24 22 20 26 26 H 1.48507 * 109.46815 * 214.99087 * 24 22 20 27 27 H 1.48504 * 109.47054 * 334.98535 * 24 22 20 28 28 C 1.47423 * 125.65035 * 184.23031 * 15 13 4 29 29 H 1.08998 * 109.47116 * 299.99270 * 1 2 3 30 30 H 1.08994 * 109.47311 * 60.00220 * 1 2 3 31 31 H 1.09003 * 109.46939 * 180.02562 * 1 2 3 32 32 H 1.09001 * 109.46692 * 240.00108 * 2 1 3 33 33 H 1.08993 * 109.47480 * 64.57196 * 3 2 1 34 34 H 1.09008 * 109.47077 * 184.57129 * 3 2 1 35 35 H 1.09006 * 109.47525 * 304.56756 * 3 2 1 36 36 H 1.00903 * 110.99757 * 224.67911 * 6 4 2 37 37 H 1.08994 * 109.54355 * 34.78913 * 7 6 4 38 38 H 1.08996 * 109.52242 * 303.05503 * 8 7 6 39 39 H 1.08992 * 109.52011 * 63.25213 * 8 7 6 40 40 H 1.08997 * 109.48211 * 297.62279 * 9 8 7 41 41 H 1.09002 * 109.48074 * 177.59866 * 9 8 7 42 42 H 1.08999 * 109.48486 * 301.18051 * 11 10 9 43 43 H 1.08996 * 109.49424 * 181.15083 * 11 10 9 44 44 H 1.09002 * 109.52074 * 182.48962 * 12 11 10 45 45 H 1.08997 * 109.52384 * 62.29854 * 12 11 10 46 46 H 1.08999 * 109.88460 * 300.51142 * 16 15 13 47 47 H 1.09002 * 109.88324 * 61.67435 * 16 15 13 48 48 H 1.08999 * 110.70895 * 263.79478 * 17 16 15 49 49 H 1.09001 * 110.75660 * 140.50369 * 17 16 15 50 50 H 0.96694 * 114.00172 * 59.22421 * 19 18 17 51 51 H 0.97001 * 119.99864 * 180.02562 * 23 22 20 52 52 H 1.08995 * 110.36425 * 37.00360 * 28 15 13 53 53 H 1.08998 * 110.37057 * 274.67741 * 28 15 13 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 2.0399 1.4425 0.0000 4 6 2.0401 -0.7213 1.2492 5 1 3.1297 -0.7438 1.2363 6 7 1.5221 -2.0958 1.2667 7 6 2.5425 -3.0487 0.8097 8 6 2.5110 -3.1391 -0.7191 9 6 3.5224 -4.1915 -1.1812 10 8 3.2124 -5.4471 -0.5734 11 6 3.2727 -5.4351 0.8542 12 6 2.2513 -4.4327 1.3981 13 6 1.5672 0.0094 2.4794 14 8 0.4488 -0.1834 2.9069 15 7 2.3872 0.8773 3.1046 16 6 3.7285 1.2697 2.6479 17 6 4.2977 2.2559 3.6901 18 6 3.4740 1.9287 4.9636 19 8 4.0218 0.8030 5.6526 20 6 3.3885 3.1264 5.8742 21 1 2.4250 3.5408 6.1323 22 6 4.5398 3.6898 6.3822 23 7 5.7052 3.1257 6.1513 24 14 4.4442 5.2541 7.3987 25 1 4.4010 4.9052 8.8415 26 1 5.6388 6.0939 7.1280 27 1 3.2171 6.0069 7.0344 28 6 2.0881 1.5898 4.3601 29 1 -0.3633 0.5137 0.8900 30 1 -0.3633 0.5138 -0.8899 31 1 -0.3633 -1.0277 0.0005 32 1 1.8933 -0.5138 -0.8900 33 1 1.7450 1.9321 0.9280 34 1 3.1269 1.4436 -0.0819 35 1 1.6113 1.9794 -0.8463 36 1 1.1822 -2.3425 2.1842 37 1 3.5268 -2.7134 1.1363 38 1 1.5117 -3.4259 -1.0465 39 1 2.7716 -2.1710 -1.1466 40 1 4.5263 -3.8839 -0.8886 41 1 3.4740 -4.2906 -2.2656 42 1 4.2733 -5.1438 1.1734 43 1 3.0445 -6.4300 1.2363 44 1 2.3262 -4.3896 2.4847 45 1 1.2467 -4.7455 1.1135 46 1 4.3695 0.3905 2.5817 47 1 3.6613 1.7561 1.6748 48 1 4.1306 3.2865 3.3770 49 1 5.3585 2.0702 3.8587 50 1 4.9390 0.9224 5.9343 51 1 6.5151 3.5219 6.5091 52 1 1.5267 0.9460 5.0371 53 1 1.5304 2.5034 4.1543 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 ZINC000592949568.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 06:10:12 Heat of formation + Delta-G solvation = -136.095017 kcal Electronic energy + Delta-G solvation = -32313.875440 eV Core-core repulsion = 28185.011658 eV Total energy + Delta-G solvation = -4128.863781 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.66 seconds Orbital eigenvalues (eV) -40.37014 -39.40018 -37.70612 -36.27907 -34.68013 -34.23654 -32.29024 -31.33709 -31.15947 -29.88944 -28.55414 -26.92072 -26.47429 -24.91771 -23.94785 -23.30682 -22.35879 -20.85977 -20.38306 -19.68843 -18.22891 -17.35133 -17.07846 -16.30617 -16.21234 -15.99548 -15.64930 -15.06163 -15.01246 -14.96233 -14.65106 -14.28595 -14.09760 -13.84968 -13.54834 -13.17589 -13.15473 -12.86842 -12.55867 -12.46706 -12.21616 -12.04221 -11.91133 -11.76565 -11.70815 -11.51302 -11.42601 -11.36379 -11.03879 -10.99749 -10.92313 -10.83704 -10.72555 -10.54479 -10.50279 -10.41001 -10.08694 -9.84731 -9.49864 -9.25013 -8.71456 -8.56221 -8.28122 -8.04413 -6.34804 -4.41745 2.94610 3.15681 3.23829 3.27109 3.38553 3.64344 3.97125 4.22295 4.46757 4.64765 4.70693 4.77659 4.91490 4.96289 4.99756 5.03530 5.04993 5.18944 5.23202 5.32937 5.42028 5.43569 5.45328 5.47257 5.58771 5.63542 5.70527 5.75666 5.79319 5.85344 5.91499 5.96383 5.99882 6.08074 6.11340 6.18739 6.21024 6.35258 6.43852 6.56732 6.65051 6.80517 6.81522 6.94160 6.96201 7.20416 7.26169 7.26427 7.67376 7.96491 8.06417 8.55223 8.61474 9.23841 9.34617 10.73111 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.016685 B = 0.002934 C = 0.002733 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1677.741391 B = 9541.335910 C =10243.953817 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.140 4.140 2 C -0.072 4.072 3 C -0.160 4.160 4 C 0.079 3.921 5 H 0.067 0.933 6 N -0.661 5.661 7 C 0.085 3.915 8 C -0.144 4.144 9 C 0.060 3.940 10 O -0.384 6.384 11 C 0.065 3.935 12 C -0.159 4.159 13 C 0.518 3.482 14 O -0.542 6.542 15 N -0.603 5.603 16 C 0.091 3.909 17 C -0.137 4.137 18 C 0.249 3.751 19 O -0.584 6.584 20 C -0.535 4.535 21 H 0.064 0.936 22 C 0.074 3.926 23 N -0.894 5.894 24 Si 0.902 3.098 25 H -0.279 1.279 26 H -0.284 1.284 27 H -0.272 1.272 28 C 0.120 3.880 29 H 0.060 0.940 30 H 0.042 0.958 31 H 0.068 0.932 32 H 0.076 0.924 33 H 0.062 0.938 34 H 0.057 0.943 35 H 0.059 0.941 36 H 0.353 0.647 37 H 0.046 0.954 38 H 0.080 0.920 39 H 0.074 0.926 40 H 0.048 0.952 41 H 0.094 0.906 42 H 0.050 0.950 43 H 0.095 0.905 44 H 0.074 0.926 45 H 0.082 0.918 46 H 0.053 0.947 47 H 0.062 0.938 48 H 0.069 0.931 49 H 0.085 0.915 50 H 0.380 0.620 51 H 0.268 0.732 52 H 0.069 0.931 53 H 0.071 0.929 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -1.183 -10.051 -14.240 17.470 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 -0.197 4.197 2 C -0.092 4.092 3 C -0.218 4.218 4 C -0.034 4.034 5 H 0.085 0.915 6 N -0.294 5.294 7 C -0.025 4.025 8 C -0.182 4.182 9 C -0.017 4.017 10 O -0.303 6.303 11 C -0.013 4.013 12 C -0.197 4.197 13 C 0.305 3.695 14 O -0.420 6.420 15 N -0.336 5.336 16 C -0.032 4.032 17 C -0.175 4.175 18 C 0.208 3.792 19 O -0.392 6.392 20 C -0.573 4.573 21 H 0.083 0.917 22 C -0.129 4.129 23 N -0.533 5.533 24 Si 0.729 3.271 25 H -0.205 1.205 26 H -0.210 1.210 27 H -0.196 1.196 28 C -0.001 4.001 29 H 0.079 0.921 30 H 0.061 0.939 31 H 0.087 0.913 32 H 0.095 0.905 33 H 0.081 0.919 34 H 0.076 0.924 35 H 0.078 0.922 36 H 0.174 0.826 37 H 0.064 0.936 38 H 0.099 0.901 39 H 0.092 0.908 40 H 0.067 0.933 41 H 0.112 0.888 42 H 0.068 0.932 43 H 0.113 0.887 44 H 0.092 0.908 45 H 0.101 0.899 46 H 0.071 0.929 47 H 0.081 0.919 48 H 0.087 0.913 49 H 0.103 0.897 50 H 0.230 0.770 51 H 0.078 0.922 52 H 0.087 0.913 53 H 0.090 0.910 Dipole moment (debyes) X Y Z Total from point charges -2.589 -10.532 -14.824 18.368 hybrid contribution 1.464 1.488 1.628 2.647 sum -1.124 -9.043 -13.197 16.037 Atomic orbital electron populations 1.21746 0.93992 1.02874 1.01114 1.21038 0.97496 0.94827 0.95816 1.22121 1.00861 0.96216 1.02616 1.21712 0.98244 0.89529 0.93955 0.91482 1.60455 1.35478 0.99686 1.33806 1.21696 0.93521 0.91788 0.95515 1.22293 1.01151 0.99453 0.95282 1.22627 0.97055 0.83901 0.98144 1.87920 1.90890 1.32112 1.19332 1.22538 0.97802 0.99875 0.81040 1.22402 1.01508 0.94933 1.00879 1.20269 0.84935 0.79724 0.84572 1.90668 1.19243 1.65173 1.66920 1.48675 1.17022 1.42524 1.25337 1.22386 0.83182 0.98687 0.98937 1.23183 1.01609 0.97159 0.95573 1.19629 0.86756 0.84597 0.88195 1.86139 1.33319 1.41948 1.77816 1.21433 0.93515 1.12614 1.29786 0.91739 1.24975 0.95118 0.97472 0.95331 1.69702 0.98136 1.40069 1.45443 0.86420 0.77846 0.82548 0.80295 1.20492 1.20980 1.19618 1.22376 0.98898 0.95375 0.83463 0.92121 0.93896 0.91303 0.90539 0.91927 0.92433 0.92233 0.82574 0.93571 0.90122 0.90791 0.93347 0.88777 0.93168 0.88672 0.90764 0.89903 0.92876 0.91946 0.91276 0.89655 0.76989 0.92239 0.91288 0.91048 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 -0.14 -1.87 8.62 37.16 0.32 -1.54 16 2 C -0.07 -0.89 2.87 -90.62 -0.26 -1.15 16 3 C -0.16 -1.94 7.63 37.15 0.28 -1.66 16 4 C 0.08 1.08 1.99 -68.87 -0.14 0.95 16 5 H 0.07 0.90 5.87 -51.93 -0.30 0.60 16 6 N -0.66 -8.43 5.27 -100.76 -0.53 -8.96 16 7 C 0.08 0.90 2.54 -67.53 -0.17 0.73 16 8 C -0.14 -1.35 5.45 -26.59 -0.14 -1.50 16 9 C 0.06 0.52 6.84 37.21 0.25 0.78 16 10 O -0.38 -4.05 10.76 -35.23 -0.38 -4.43 16 11 C 0.06 0.58 6.84 37.21 0.25 0.84 16 12 C -0.16 -1.54 5.40 -26.59 -0.14 -1.69 16 13 C 0.52 9.20 5.02 -10.99 -0.06 9.14 16 14 O -0.54 -11.18 15.10 5.56 0.08 -11.09 16 15 N -0.60 -11.29 2.88 -170.50 -0.49 -11.78 16 16 C 0.09 1.55 5.71 -3.04 -0.02 1.54 16 17 C -0.14 -2.80 5.38 -24.87 -0.13 -2.93 16 18 C 0.25 5.78 0.87 -89.62 -0.08 5.70 16 19 O -0.58 -14.38 13.16 -35.23 -0.46 -14.84 16 20 C -0.54 -13.61 8.27 -34.44 -0.28 -13.89 16 21 H 0.06 1.65 7.80 -52.48 -0.41 1.24 16 22 C 0.07 1.85 5.27 -17.82 -0.09 1.76 16 23 N -0.89 -22.40 10.82 55.43 0.60 -21.80 16 24 Si 0.90 19.80 29.54 -169.99 -5.02 14.78 16 25 H -0.28 -6.19 7.11 56.52 0.40 -5.79 16 26 H -0.28 -6.18 7.11 56.52 0.40 -5.78 16 27 H -0.27 -5.95 7.11 56.52 0.40 -5.55 16 28 C 0.12 2.61 6.07 -2.53 -0.02 2.60 16 29 H 0.06 0.97 6.38 -51.93 -0.33 0.64 16 30 H 0.04 0.50 8.14 -51.93 -0.42 0.07 16 31 H 0.07 0.94 7.56 -51.93 -0.39 0.55 16 32 H 0.08 0.83 6.16 -51.93 -0.32 0.51 16 33 H 0.06 0.91 6.05 -51.93 -0.31 0.59 16 34 H 0.06 0.63 6.93 -51.92 -0.36 0.27 16 35 H 0.06 0.64 8.14 -51.93 -0.42 0.22 16 36 H 0.35 5.06 7.35 -39.29 -0.29 4.77 16 37 H 0.05 0.52 7.35 -51.93 -0.38 0.14 16 38 H 0.08 0.83 8.14 -51.93 -0.42 0.41 16 39 H 0.07 0.67 6.30 -51.93 -0.33 0.34 16 40 H 0.05 0.39 8.14 -51.93 -0.42 -0.03 16 41 H 0.09 0.69 8.14 -51.93 -0.42 0.26 16 42 H 0.05 0.43 8.14 -51.93 -0.42 0.00 16 43 H 0.10 0.72 8.14 -51.93 -0.42 0.30 16 44 H 0.07 0.71 8.14 -51.93 -0.42 0.29 16 45 H 0.08 0.84 8.14 -51.93 -0.42 0.42 16 46 H 0.05 0.87 7.65 -51.93 -0.40 0.47 16 47 H 0.06 0.92 5.01 -51.93 -0.26 0.66 16 48 H 0.07 1.44 8.03 -51.93 -0.42 1.02 16 49 H 0.08 1.83 7.59 -51.93 -0.39 1.44 16 50 H 0.38 9.35 7.56 45.56 0.34 9.69 16 51 H 0.27 6.45 8.31 -40.82 -0.34 6.11 16 52 H 0.07 1.60 8.08 -51.93 -0.42 1.18 16 53 H 0.07 1.52 8.03 -51.93 -0.42 1.10 16 LS Contribution 394.93 15.07 5.95 5.95 Total: -1.00 -27.35 394.93 -9.00 -36.35 By element: Atomic # 1 Polarization: 24.50 SS G_CDS: -8.33 Total: 16.17 kcal Atomic # 6 Polarization: 0.09 SS G_CDS: -0.42 Total: -0.34 kcal Atomic # 7 Polarization: -42.12 SS G_CDS: -0.42 Total: -42.54 kcal Atomic # 8 Polarization: -29.61 SS G_CDS: -0.76 Total: -30.36 kcal Atomic # 14 Polarization: 19.80 SS G_CDS: -5.02 Total: 14.78 kcal Total LS contribution 5.95 Total: 5.95 kcal Total: -27.35 -9.00 -36.35 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. ZINC000592949568.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 -99.746 kcal (2) G-P(sol) polarization free energy of solvation -27.346 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -127.092 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.003 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -36.349 kcal (6) G-S(sol) free energy of system = (1) + (5) -136.095 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.66 seconds