Wall clock time and date at job start Wed Apr 1 2020 00:35:02 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 1.53003 * 1 3 3 H 1.09000 * 109.46966 * 2 1 4 4 C 1.50695 * 109.47406 * 239.99792 * 2 1 3 5 5 H 1.07999 * 120.00252 * 245.34710 * 4 2 1 6 6 C 1.37882 * 120.00017 * 65.35332 * 4 2 1 7 7 N 1.31512 * 119.99807 * 5.14042 * 6 4 2 8 8 Si 1.86797 * 119.99961 * 185.14713 * 6 4 2 9 9 H 1.48503 * 109.47312 * 84.99700 * 8 6 4 10 10 H 1.48495 * 109.47272 * 324.99487 * 8 6 4 11 11 H 1.48502 * 109.47008 * 204.99631 * 8 6 4 12 12 N 1.46505 * 109.47075 * 119.99685 * 2 1 3 13 13 C 1.34774 * 120.00085 * 275.00460 * 12 2 1 14 14 O 1.21280 * 119.99975 * 359.97438 * 13 12 2 15 15 C 1.50701 * 120.00029 * 179.97438 * 13 12 2 16 16 C 1.52999 * 109.47273 * 179.97438 * 15 13 12 17 17 H 1.09003 * 110.63823 * 54.30205 * 16 15 13 18 18 C 1.54324 * 110.72190 * 291.15867 * 16 15 13 19 19 N 1.47020 * 107.26968 * 219.44147 * 18 16 15 20 20 C 1.34772 * 125.64736 * 178.97739 * 19 18 16 21 21 O 1.21513 * 120.00340 * 359.97438 * 20 19 18 22 22 O 1.34640 * 120.00209 * 180.02562 * 20 19 18 23 23 C 1.45199 * 117.00081 * 179.97438 * 22 20 19 24 24 C 1.53001 * 109.46740 * 60.00273 * 23 22 20 25 25 C 1.53000 * 109.47079 * 179.97438 * 23 22 20 26 26 C 1.52991 * 109.47410 * 300.00306 * 23 22 20 27 27 C 1.47425 * 108.70368 * 358.94106 * 19 18 16 28 28 C 1.55119 * 104.94627 * 24.00410 * 27 19 18 29 29 H 1.08996 * 110.93620 * 81.20933 * 28 27 19 30 30 C 1.52994 * 111.16362 * 205.13381 * 28 27 19 31 31 H 1.08992 * 109.47480 * 294.97156 * 1 2 3 32 32 H 1.08993 * 109.46657 * 54.97693 * 1 2 3 33 33 H 1.09004 * 109.46489 * 174.97207 * 1 2 3 34 34 H 0.96997 * 120.00294 * 180.02562 * 7 6 4 35 35 H 0.97005 * 120.00023 * 95.00075 * 12 2 1 36 36 H 1.08999 * 109.47084 * 299.99866 * 15 13 12 37 37 H 1.09001 * 109.47446 * 59.99702 * 15 13 12 38 38 H 1.08996 * 109.87792 * 338.86219 * 18 16 15 39 39 H 1.09002 * 109.88101 * 100.02316 * 18 16 15 40 40 H 1.09004 * 109.47611 * 60.00182 * 24 23 22 41 41 H 1.09001 * 109.47253 * 179.97438 * 24 23 22 42 42 H 1.08998 * 109.47439 * 299.99921 * 24 23 22 43 43 H 1.09000 * 109.47103 * 60.00299 * 25 23 22 44 44 H 1.09001 * 109.47228 * 180.02562 * 25 23 22 45 45 H 1.09007 * 109.47170 * 300.00345 * 25 23 22 46 46 H 1.08998 * 109.47596 * 59.99690 * 26 23 22 47 47 H 1.09003 * 109.47399 * 180.02562 * 26 23 22 48 48 H 1.08994 * 109.47231 * 299.99442 * 26 23 22 49 49 H 1.09001 * 110.36502 * 142.97031 * 27 19 18 50 50 H 1.09002 * 110.36763 * 265.28569 * 27 19 18 51 51 H 1.09003 * 109.47150 * 172.16758 * 30 28 27 52 52 H 1.09002 * 109.47132 * 292.16454 * 30 28 27 53 53 H 1.08994 * 109.47400 * 52.16847 * 30 28 27 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 1 1.8933 1.0277 0.0000 4 6 2.0324 -0.7104 -1.2304 5 1 2.5803 -1.6361 -1.1336 6 6 1.7928 -0.1786 -2.4797 7 7 1.2154 0.9975 -2.5940 8 14 2.2880 -1.1286 -4.0099 9 1 1.2114 -2.0868 -4.3678 10 1 3.5453 -1.8730 -3.7451 11 1 2.5010 -0.1811 -5.1334 12 7 2.0184 -0.6906 1.1962 13 6 2.1470 -0.0182 2.3572 14 8 1.8589 1.1586 2.4115 15 6 2.6488 -0.7287 3.5878 16 6 2.7009 0.2546 4.7589 17 1 1.7327 0.7349 4.9006 18 6 3.8063 1.3086 4.5381 19 7 4.4507 1.5441 5.8383 20 6 5.4800 2.3844 6.0641 21 8 5.9531 3.0259 5.1469 22 8 5.9848 2.5122 7.3057 23 6 7.0932 3.4348 7.4749 24 6 6.6534 4.8412 7.0631 25 6 7.5280 3.4461 8.9417 26 6 8.2655 2.9899 6.5983 27 6 3.7840 0.7096 6.8545 28 6 3.1532 -0.4627 6.0583 29 1 3.8957 -1.2308 5.8422 30 6 1.9552 -1.0549 6.8032 31 1 -0.3634 0.4338 0.9315 32 1 -0.3632 0.5898 -0.8415 33 1 -0.3632 -1.0238 -0.0901 34 1 1.0465 1.3716 -3.4728 35 1 2.2491 -1.6318 1.1527 36 1 1.9759 -1.5505 3.8327 37 1 3.6479 -1.1213 3.3988 38 1 4.5389 0.9332 3.8237 39 1 3.3665 2.2352 4.1690 40 1 5.8182 5.1583 7.6876 41 1 7.4853 5.5339 7.1905 42 1 6.3433 4.8336 6.0182 43 1 7.8412 2.4442 9.2355 44 1 8.3598 4.1390 9.0688 45 1 6.6926 3.7633 9.5660 46 1 7.9555 2.9822 5.5533 47 1 9.0977 3.6823 6.7256 48 1 8.5788 1.9881 6.8916 49 1 4.5119 0.3331 7.5731 50 1 3.0072 1.2801 7.3637 51 1 1.4503 -1.7779 6.1626 52 1 2.3006 -1.5517 7.7099 53 1 1.2614 -0.2571 7.0679 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 ZINC000931155354.mol2 53 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 00:35:02 Heat of formation + Delta-G solvation = -135.056787 kcal Electronic energy + Delta-G solvation = -30777.543438 eV Core-core repulsion = 26648.724678 eV Total energy + Delta-G solvation = -4128.818760 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.96 seconds Orbital eigenvalues (eV) -40.91363 -39.60655 -38.34160 -36.70082 -34.80595 -34.30639 -33.15712 -32.34065 -31.45470 -29.13667 -27.64174 -27.55521 -26.91792 -26.55189 -25.21169 -23.28401 -21.56456 -21.04926 -20.05184 -19.51210 -19.31903 -17.88801 -17.11287 -16.82465 -16.43204 -15.76523 -15.63015 -15.18134 -15.03221 -14.68411 -14.51921 -14.21546 -13.88960 -13.72586 -13.53422 -13.15344 -12.99334 -12.77242 -12.67758 -12.49724 -12.39031 -12.32528 -12.09388 -12.03300 -11.96055 -11.85108 -11.66351 -11.52549 -11.41187 -11.12425 -10.99137 -10.91845 -10.82616 -10.74406 -10.64274 -10.49481 -10.32916 -10.26493 -10.06352 -9.07238 -8.97015 -8.73594 -8.53461 -7.89898 -6.12612 -4.19526 2.01390 2.82714 3.25440 3.32029 3.33599 3.41549 3.76383 4.02512 4.26994 4.36845 4.51030 4.52770 4.54910 4.69696 4.70188 5.07447 5.14544 5.21422 5.22521 5.24260 5.27990 5.31580 5.34260 5.36697 5.46560 5.51317 5.54475 5.64777 5.66348 5.69560 5.72862 5.75380 5.79716 5.89662 5.99387 6.09244 6.12034 6.13966 6.20739 6.33704 6.39323 6.79693 6.89763 7.10922 7.44878 7.46194 7.56646 7.69624 7.87141 8.09089 8.31534 8.68841 8.80639 9.14988 9.47350 10.95739 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.014470 B = 0.002345 C = 0.002129 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1934.540873 B =11935.807512 C =13146.261572 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 0.262 3.738 3 H 0.054 0.946 4 C -0.535 4.535 5 H 0.060 0.940 6 C 0.067 3.933 7 N -0.883 5.883 8 Si 0.899 3.101 9 H -0.279 1.279 10 H -0.274 1.274 11 H -0.286 1.286 12 N -0.710 5.710 13 C 0.497 3.503 14 O -0.553 6.553 15 C -0.134 4.134 16 C -0.075 4.075 17 H 0.097 0.903 18 C 0.136 3.864 19 N -0.604 5.604 20 C 0.665 3.335 21 O -0.563 6.563 22 O -0.364 6.364 23 C 0.135 3.865 24 C -0.184 4.184 25 C -0.139 4.139 26 C -0.184 4.184 27 C 0.109 3.891 28 C -0.104 4.104 29 H 0.088 0.912 30 C -0.140 4.140 31 H 0.017 0.983 32 H 0.074 0.926 33 H 0.029 0.971 34 H 0.264 0.736 35 H 0.388 0.612 36 H 0.094 0.906 37 H 0.090 0.910 38 H 0.070 0.930 39 H 0.084 0.916 40 H 0.059 0.941 41 H 0.069 0.931 42 H 0.089 0.911 43 H 0.065 0.935 44 H 0.079 0.921 45 H 0.065 0.935 46 H 0.089 0.911 47 H 0.069 0.931 48 H 0.058 0.942 49 H 0.078 0.922 50 H 0.070 0.930 51 H 0.064 0.936 52 H 0.058 0.942 53 H 0.060 0.940 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 8.191 -2.035 24.575 25.984 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 -0.199 4.199 2 C 0.161 3.839 3 H 0.072 0.928 4 C -0.574 4.574 5 H 0.079 0.921 6 C -0.137 4.137 7 N -0.520 5.520 8 Si 0.727 3.273 9 H -0.205 1.205 10 H -0.199 1.199 11 H -0.211 1.211 12 N -0.358 5.358 13 C 0.282 3.718 14 O -0.432 6.432 15 C -0.174 4.174 16 C -0.094 4.094 17 H 0.115 0.885 18 C 0.015 3.985 19 N -0.345 5.345 20 C 0.420 3.580 21 O -0.452 6.452 22 O -0.279 6.279 23 C 0.099 3.901 24 C -0.241 4.241 25 C -0.196 4.196 26 C -0.241 4.241 27 C -0.014 4.014 28 C -0.123 4.123 29 H 0.106 0.894 30 C -0.198 4.198 31 H 0.036 0.964 32 H 0.092 0.908 33 H 0.048 0.952 34 H 0.074 0.926 35 H 0.220 0.780 36 H 0.112 0.888 37 H 0.108 0.892 38 H 0.088 0.912 39 H 0.102 0.898 40 H 0.078 0.922 41 H 0.088 0.912 42 H 0.108 0.892 43 H 0.084 0.916 44 H 0.098 0.902 45 H 0.085 0.915 46 H 0.108 0.892 47 H 0.088 0.912 48 H 0.077 0.923 49 H 0.096 0.904 50 H 0.088 0.912 51 H 0.083 0.917 52 H 0.077 0.923 53 H 0.079 0.921 Dipole moment (debyes) X Y Z Total from point charges 8.196 -0.726 24.199 25.559 hybrid contribution 0.388 -0.923 -1.003 1.418 sum 8.584 -1.649 23.195 24.788 Atomic orbital electron populations 1.22006 0.98819 0.99437 0.99622 1.18736 0.90611 0.94440 0.80153 0.92829 1.21179 1.36898 1.08765 0.90521 0.92142 1.24899 0.94968 0.94724 0.99073 1.69954 1.42016 1.15828 1.24156 0.86499 0.78882 0.79624 0.82301 1.20472 1.19923 1.21136 1.46529 1.65058 1.13517 1.10661 1.20424 0.78847 0.87658 0.84864 1.90665 1.51322 1.16013 1.85203 1.21734 1.03255 0.99018 0.93429 1.22034 0.99459 0.94721 0.93197 0.88469 1.22034 0.93848 1.00321 0.82281 1.47201 1.32606 1.42979 1.11757 1.17478 0.79507 0.79427 0.81616 1.90929 1.61762 1.48239 1.44281 1.86283 1.49328 1.62384 1.29952 1.22048 0.83736 0.87920 0.96429 1.22522 1.02019 0.94772 1.04809 1.21846 1.01820 1.03077 0.92868 1.22517 0.97243 1.01537 1.02789 1.22425 0.96710 0.91203 0.91036 1.22503 0.98255 0.96590 0.94954 0.89410 1.21696 0.96911 1.01156 1.00020 0.96397 0.90763 0.95200 0.92566 0.78012 0.88766 0.89157 0.91207 0.89790 0.92233 0.91206 0.89232 0.91566 0.90200 0.91543 0.89246 0.91204 0.92270 0.90377 0.91170 0.91719 0.92315 0.92136 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 -3.41 9.26 37.16 0.34 -3.07 16 2 C 0.26 6.62 2.43 -69.08 -0.17 6.45 16 3 H 0.05 1.59 7.56 -51.93 -0.39 1.20 16 4 C -0.54 -14.17 8.67 -34.44 -0.30 -14.47 16 5 H 0.06 1.52 7.72 -52.49 -0.41 1.12 16 6 C 0.07 1.82 5.29 -17.82 -0.09 1.72 16 7 N -0.88 -25.25 11.98 55.43 0.66 -24.59 16 8 Si 0.90 20.76 29.54 -169.99 -5.02 15.74 16 9 H -0.28 -6.33 7.11 56.52 0.40 -5.93 16 10 H -0.27 -6.22 7.11 56.52 0.40 -5.82 16 11 H -0.29 -6.62 7.11 56.52 0.40 -6.21 16 12 N -0.71 -14.24 5.07 -54.93 -0.28 -14.52 16 13 C 0.50 9.23 7.60 -10.99 -0.08 9.15 16 14 O -0.55 -12.48 14.66 5.56 0.08 -12.39 16 15 C -0.13 -1.66 5.10 -27.88 -0.14 -1.80 16 16 C -0.07 -0.89 1.99 -88.78 -0.18 -1.07 16 17 H 0.10 1.26 7.86 -51.93 -0.41 0.86 16 18 C 0.14 1.99 5.58 -3.07 -0.02 1.98 16 19 N -0.60 -8.11 3.33 -176.17 -0.59 -8.69 16 20 C 0.66 9.88 7.93 54.05 0.43 10.31 16 21 O -0.56 -9.88 12.21 -19.28 -0.24 -10.11 16 22 O -0.36 -4.59 9.42 -40.33 -0.38 -4.97 16 23 C 0.14 1.41 1.13 -90.62 -0.10 1.30 16 24 C -0.18 -1.94 8.37 37.16 0.31 -1.63 16 25 C -0.14 -0.99 8.85 37.16 0.33 -0.67 16 26 C -0.18 -1.90 8.37 37.15 0.31 -1.59 16 27 C 0.11 1.07 6.41 -2.42 -0.02 1.05 16 28 C -0.10 -0.91 3.10 -88.36 -0.27 -1.18 16 29 H 0.09 0.71 8.05 -51.93 -0.42 0.30 16 30 C -0.14 -0.97 9.31 37.15 0.35 -0.62 16 31 H 0.02 0.41 8.14 -51.93 -0.42 -0.02 16 32 H 0.07 1.97 6.84 -51.93 -0.36 1.61 16 33 H 0.03 0.67 8.14 -51.93 -0.42 0.25 16 34 H 0.26 7.18 8.31 -40.82 -0.34 6.85 16 35 H 0.39 6.63 8.53 -40.82 -0.35 6.29 16 36 H 0.09 0.94 8.14 -51.93 -0.42 0.52 16 37 H 0.09 1.00 8.00 -51.93 -0.42 0.59 16 38 H 0.07 1.10 7.73 -51.93 -0.40 0.70 16 39 H 0.08 1.47 7.78 -51.93 -0.40 1.06 16 40 H 0.06 0.59 8.14 -51.93 -0.42 0.17 16 41 H 0.07 0.58 8.14 -51.93 -0.42 0.16 16 42 H 0.09 1.21 5.88 -51.93 -0.31 0.91 16 43 H 0.07 0.45 8.14 -51.93 -0.42 0.02 16 44 H 0.08 0.43 8.14 -51.93 -0.42 0.01 16 45 H 0.07 0.45 8.14 -51.92 -0.42 0.03 16 46 H 0.09 1.19 5.88 -51.93 -0.31 0.88 16 47 H 0.07 0.57 8.14 -51.93 -0.42 0.15 16 48 H 0.06 0.57 8.14 -51.93 -0.42 0.15 16 49 H 0.08 0.68 8.04 -51.93 -0.42 0.26 16 50 H 0.07 0.64 7.99 -51.93 -0.41 0.23 16 51 H 0.06 0.44 8.14 -51.93 -0.42 0.01 16 52 H 0.06 0.33 8.14 -51.93 -0.42 -0.09 16 53 H 0.06 0.43 8.08 -51.93 -0.42 0.01 16 LS Contribution 418.84 15.07 6.31 6.31 Total: -1.00 -32.75 418.84 -8.36 -41.11 By element: Atomic # 1 Polarization: 15.86 SS G_CDS: -9.62 Total: 6.24 kcal Atomic # 6 Polarization: 5.18 SS G_CDS: 0.70 Total: 5.88 kcal Atomic # 7 Polarization: -47.60 SS G_CDS: -0.20 Total: -47.80 kcal Atomic # 8 Polarization: -26.95 SS G_CDS: -0.53 Total: -27.48 kcal Atomic # 14 Polarization: 20.76 SS G_CDS: -5.02 Total: 15.74 kcal Total LS contribution 6.31 Total: 6.31 kcal Total: -32.75 -8.36 -41.11 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. ZINC000931155354.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 -93.945 kcal (2) G-P(sol) polarization free energy of solvation -32.748 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -126.693 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.364 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.112 kcal (6) G-S(sol) free energy of system = (1) + (5) -135.057 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.96 seconds