Wall clock time and date at job start Sat Apr 11 2020 06:12:39 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 O 1.42893 * 1 3 3 C 1.42898 * 114.00509 * 2 1 4 4 C 1.53005 * 109.47463 * 202.35794 * 3 2 1 5 5 N 1.46498 * 109.46838 * 300.00113 * 4 3 2 6 6 C 1.45778 * 117.95736 * 270.01947 * 5 4 3 7 7 C 1.52773 * 110.50246 * 161.06388 * 6 5 4 8 8 C 1.53219 * 108.91210 * 50.51147 * 7 6 5 9 9 C 1.53083 * 108.45509 * 292.69782 * 8 7 6 10 10 C 1.33348 * 117.95616 * 90.00291 * 5 4 3 11 11 O 1.21279 * 118.22760 * 2.33728 * 10 5 4 12 12 C 1.52997 * 109.75028 * 290.65176 * 7 6 5 13 13 C 1.53062 * 109.27808 * 182.03213 * 12 7 6 14 14 N 1.46844 * 109.50853 * 59.01373 * 13 12 7 15 15 C 1.46903 * 110.99626 * 174.09237 * 14 13 12 16 16 C 1.50700 * 109.47029 * 64.57867 * 15 14 13 17 17 H 1.08001 * 119.99843 * 357.40384 * 16 15 14 18 18 C 1.37877 * 119.99782 * 177.39313 * 16 15 14 19 19 N 1.31513 * 120.00127 * 0.02562 * 18 16 15 20 20 Si 1.86804 * 119.99626 * 179.97438 * 18 16 15 21 21 H 1.48500 * 109.47125 * 0.02562 * 20 18 16 22 22 H 1.48504 * 109.47044 * 120.00279 * 20 18 16 23 23 H 1.48492 * 109.47111 * 240.00351 * 20 18 16 24 24 C 1.46834 * 111.24492 * 298.22536 * 14 13 12 25 25 C 1.52982 * 109.77715 * 170.39289 * 7 6 5 26 26 O 1.42903 * 109.46925 * 82.35535 * 3 2 1 27 27 C 1.42899 * 114.00250 * 285.54477 * 26 3 2 28 28 H 1.09003 * 109.46925 * 304.44400 * 1 2 3 29 29 H 1.09001 * 109.47220 * 64.43690 * 1 2 3 30 30 H 1.08994 * 109.47336 * 184.44389 * 1 2 3 31 31 H 1.09005 * 109.47280 * 322.36204 * 3 2 1 32 32 H 1.08996 * 109.47001 * 180.02562 * 4 3 2 33 33 H 1.08991 * 109.46749 * 60.00113 * 4 3 2 34 34 H 1.08998 * 109.26943 * 40.79612 * 6 5 4 35 35 H 1.09003 * 109.27228 * 281.32553 * 6 5 4 36 36 H 1.09004 * 109.63623 * 52.38277 * 8 7 6 37 37 H 1.09000 * 109.64172 * 173.00564 * 8 7 6 38 38 H 1.09002 * 109.40326 * 168.90666 * 9 8 7 39 39 H 1.09005 * 109.40161 * 288.73250 * 9 8 7 40 40 H 1.09005 * 109.50318 * 62.09056 * 12 7 6 41 41 H 1.09000 * 109.53837 * 301.99608 * 12 7 6 42 42 H 1.08998 * 109.46399 * 299.00001 * 13 12 7 43 43 H 1.09001 * 109.46418 * 179.02723 * 13 12 7 44 44 H 1.09002 * 109.47222 * 304.57718 * 15 14 13 45 45 H 1.09004 * 109.46708 * 184.57831 * 15 14 13 46 46 H 0.97003 * 119.99738 * 179.97438 * 19 18 16 47 47 H 1.09001 * 109.46831 * 181.78772 * 24 14 13 48 48 H 1.09005 * 109.46644 * 301.76684 * 24 14 13 49 49 H 1.09001 * 109.50335 * 297.88539 * 25 7 6 50 50 H 1.08991 * 109.50922 * 57.97014 * 25 7 6 51 51 H 1.08997 * 109.46822 * 318.17452 * 27 26 3 52 52 H 1.08996 * 109.47072 * 78.17486 * 27 26 3 53 53 H 1.09003 * 109.46776 * 198.17624 * 27 26 3 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 8 1.4289 0.0000 0.0000 3 6 2.0103 1.3054 0.0000 4 6 3.4365 1.2286 -0.5487 5 7 4.2369 0.3376 0.2948 6 6 4.9473 0.9225 1.4255 7 6 5.3257 -0.1583 2.4367 8 6 6.0270 -1.3041 1.6999 9 6 5.0073 -1.9888 0.7862 10 6 4.2699 -0.9579 -0.0193 11 8 3.6724 -1.3235 -1.0093 12 6 4.0652 -0.6883 3.1230 13 6 4.4608 -1.7334 4.1690 14 7 5.3614 -1.1233 5.1555 15 6 5.6506 -2.0569 6.2523 16 6 6.4081 -3.2438 5.7151 17 1 6.6138 -3.3194 4.6576 18 6 6.8386 -4.2329 6.5737 19 7 6.5878 -4.1408 7.8615 20 14 7.7769 -5.7045 5.9077 21 1 7.9273 -5.5710 4.4364 22 1 9.1199 -5.7621 6.5388 23 1 7.0301 -6.9497 6.2185 24 6 6.6008 -0.6522 4.5247 25 6 6.2698 0.4255 3.4894 26 8 2.0403 1.8134 1.3353 27 6 0.7655 2.2321 1.8268 28 1 -0.3633 0.5813 0.8475 29 1 -0.3634 0.4434 -0.9271 30 1 -0.3634 -1.0245 0.0796 31 1 1.4147 1.9684 -0.6276 32 1 3.8800 2.2243 -0.5483 33 1 3.4135 0.8412 -1.5672 34 1 4.3074 1.6601 1.9098 35 1 5.8526 1.4125 1.0670 36 1 6.8468 -0.9071 1.1011 37 1 6.4121 -2.0232 2.4228 38 1 5.5254 -2.6717 0.1130 39 1 4.2960 -2.5489 1.3932 40 1 3.4116 -1.1460 2.3804 41 1 3.5421 0.1345 3.6104 42 1 4.9684 -2.5640 3.6787 43 1 3.5662 -2.1006 4.6720 44 1 4.7151 -2.3945 6.6984 45 1 6.2529 -1.5534 7.0086 46 1 6.8905 -4.8370 8.4654 47 1 7.2598 -0.2345 5.2859 48 1 7.0984 -1.4880 4.0326 49 1 7.1881 0.7619 3.0081 50 1 5.7875 1.2691 3.9830 51 1 0.2333 2.7713 1.0431 52 1 0.1860 1.3583 2.1245 53 1 0.9049 2.8862 2.6875 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 ZINC001274030434.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 06:12:39 Heat of formation + Delta-G solvation = -117.088676 kcal Electronic energy + Delta-G solvation = -33162.873327 eV Core-core repulsion = 29034.833722 eV Total energy + Delta-G solvation = -4128.039605 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.75 seconds Orbital eigenvalues (eV) -40.97400 -39.30700 -38.38292 -36.09230 -35.81272 -34.34350 -32.51651 -31.17201 -30.05327 -29.92188 -27.77813 -26.85480 -26.18779 -25.44688 -24.21127 -23.14418 -22.51892 -22.42182 -20.76460 -19.04997 -17.66323 -17.58070 -17.31761 -16.54422 -16.33372 -16.07594 -15.91971 -15.24076 -14.84141 -14.58511 -14.43377 -14.31829 -14.04588 -13.89649 -13.71279 -13.65009 -13.42487 -13.02737 -12.73276 -12.65288 -12.42893 -12.16768 -11.96426 -11.82958 -11.78967 -11.52476 -11.48881 -11.40400 -11.03646 -10.97923 -10.72147 -10.51605 -10.28752 -10.21347 -10.18501 -10.10797 -9.93382 -9.69627 -9.63741 -9.46625 -9.26368 -8.55967 -8.41626 -7.07273 -6.00551 -4.09975 2.88878 3.01990 3.27122 3.35705 3.38454 3.49384 3.62870 4.41639 4.49942 4.72438 4.75406 4.78678 4.88131 4.90304 4.97423 5.03351 5.08615 5.17253 5.18212 5.20204 5.29618 5.39438 5.44968 5.51243 5.54229 5.60204 5.63143 5.77566 5.79075 5.91865 5.94437 6.06784 6.14218 6.19245 6.26735 6.34577 6.42839 6.51715 6.57257 6.60606 6.78957 6.83147 6.84303 6.94659 7.00034 7.35231 7.55315 7.63902 7.92328 8.12257 8.32996 8.38655 8.41419 9.01272 9.57029 11.03949 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.016112 B = 0.003336 C = 0.003210 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1737.413147 B = 8390.787926 C = 8720.566822 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.016 3.984 2 O -0.369 6.369 3 C 0.226 3.774 4 C 0.127 3.873 5 N -0.590 5.590 6 C 0.127 3.873 7 C -0.066 4.066 8 C -0.120 4.120 9 C -0.133 4.133 10 C 0.528 3.472 11 O -0.552 6.552 12 C -0.099 4.099 13 C 0.063 3.937 14 N -0.540 5.540 15 C 0.187 3.813 16 C -0.546 4.546 17 H 0.057 0.943 18 C 0.065 3.935 19 N -0.891 5.891 20 Si 0.886 3.114 21 H -0.273 1.273 22 H -0.284 1.284 23 H -0.284 1.284 24 C 0.065 3.935 25 C -0.101 4.101 26 O -0.383 6.383 27 C 0.024 3.976 28 H 0.048 0.952 29 H 0.038 0.962 30 H 0.086 0.914 31 H 0.057 0.943 32 H 0.094 0.906 33 H 0.105 0.895 34 H 0.086 0.914 35 H 0.057 0.943 36 H 0.063 0.937 37 H 0.087 0.913 38 H 0.092 0.908 39 H 0.102 0.898 40 H 0.058 0.942 41 H 0.065 0.935 42 H 0.038 0.962 43 H 0.060 0.940 44 H 0.027 0.973 45 H 0.032 0.968 46 H 0.261 0.739 47 H 0.064 0.936 48 H 0.041 0.959 49 H 0.058 0.942 50 H 0.067 0.933 51 H 0.039 0.961 52 H 0.049 0.951 53 H 0.085 0.915 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -8.558 14.898 -15.837 23.367 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 -0.081 4.081 2 O -0.288 6.288 3 C 0.129 3.871 4 C 0.003 3.997 5 N -0.322 5.322 6 C 0.004 3.996 7 C -0.066 4.066 8 C -0.157 4.157 9 C -0.173 4.173 10 C 0.317 3.683 11 O -0.430 6.430 12 C -0.137 4.137 13 C -0.065 4.065 14 N -0.264 5.264 15 C 0.061 3.939 16 C -0.585 4.585 17 H 0.075 0.925 18 C -0.138 4.138 19 N -0.530 5.530 20 Si 0.714 3.286 21 H -0.198 1.198 22 H -0.210 1.210 23 H -0.210 1.210 24 C -0.064 4.064 25 C -0.139 4.139 26 O -0.303 6.303 27 C -0.072 4.072 28 H 0.066 0.934 29 H 0.057 0.943 30 H 0.105 0.895 31 H 0.074 0.926 32 H 0.112 0.888 33 H 0.123 0.877 34 H 0.104 0.896 35 H 0.075 0.925 36 H 0.082 0.918 37 H 0.106 0.894 38 H 0.111 0.889 39 H 0.120 0.880 40 H 0.077 0.923 41 H 0.084 0.916 42 H 0.056 0.944 43 H 0.079 0.921 44 H 0.045 0.955 45 H 0.050 0.950 46 H 0.071 0.929 47 H 0.082 0.918 48 H 0.059 0.941 49 H 0.077 0.923 50 H 0.086 0.914 51 H 0.057 0.943 52 H 0.068 0.932 53 H 0.104 0.896 Dipole moment (debyes) X Y Z Total from point charges -8.783 14.847 -15.863 23.435 hybrid contribution 0.355 -1.407 -0.523 1.542 sum -8.429 13.440 -16.386 22.807 Atomic orbital electron populations 1.23086 0.81780 1.03402 0.99782 1.88236 1.18985 1.28065 1.93552 1.23949 0.95905 0.83347 0.83892 1.21494 0.86815 0.95265 0.96116 1.47009 1.48471 1.07368 1.29320 1.21546 0.95804 0.96217 0.85987 1.20734 0.96947 0.94561 0.94377 1.21846 0.97183 0.98297 0.98381 1.21668 0.99452 0.97160 0.98978 1.20083 0.80407 0.82753 0.85075 1.90663 1.45360 1.79109 1.27907 1.21628 0.95347 0.99456 0.97226 1.21876 0.96836 0.94856 0.92947 1.62411 1.13351 1.39855 1.10758 1.19737 0.96317 0.88954 0.88893 1.21791 1.36231 1.06424 0.94065 0.92476 1.24958 0.95946 0.98100 0.94774 1.69955 1.46403 1.34161 1.02459 0.86638 0.79788 0.83034 0.79168 1.19807 1.21000 1.20998 1.21855 0.92794 0.96061 0.95680 1.21577 0.97679 0.99048 0.95621 1.88083 1.29766 1.80866 1.31612 1.22988 0.85867 0.99099 0.99273 0.93382 0.94300 0.89536 0.92569 0.88779 0.87683 0.89621 0.92482 0.91800 0.89443 0.88918 0.88012 0.92321 0.91608 0.94417 0.92132 0.95474 0.95036 0.92928 0.91773 0.94059 0.92349 0.91416 0.94274 0.93238 0.89623 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 0.02 0.15 10.67 101.05 1.08 1.23 16 2 O -0.37 -4.87 9.05 -64.17 -0.58 -5.45 16 3 C 0.23 2.40 3.16 37.16 0.12 2.52 16 4 C 0.13 1.34 5.52 -4.04 -0.02 1.32 16 5 N -0.59 -7.44 2.61 -175.04 -0.46 -7.90 16 6 C 0.13 1.48 4.83 -4.55 -0.02 1.45 16 7 C -0.07 -0.89 0.52 -154.52 -0.08 -0.97 16 8 C -0.12 -1.66 4.32 -26.57 -0.11 -1.77 16 9 C -0.13 -1.90 5.39 -28.09 -0.15 -2.06 16 10 C 0.53 7.96 6.15 -11.87 -0.07 7.89 16 11 O -0.55 -9.90 15.31 -6.50 -0.10 -10.00 16 12 C -0.10 -1.54 4.32 -26.70 -0.12 -1.66 16 13 C 0.06 1.21 4.87 -3.82 -0.02 1.19 16 14 N -0.54 -11.17 4.85 -236.08 -1.15 -12.32 16 15 C 0.19 4.73 5.12 -4.97 -0.03 4.71 16 16 C -0.55 -14.66 7.73 -34.44 -0.27 -14.93 16 17 H 0.06 1.51 5.85 -52.49 -0.31 1.21 16 18 C 0.06 1.80 5.46 -17.82 -0.10 1.70 16 19 N -0.89 -26.06 13.29 55.43 0.74 -25.32 16 20 Si 0.89 21.28 29.54 -169.99 -5.02 16.26 16 21 H -0.27 -6.45 7.11 56.52 0.40 -6.05 16 22 H -0.28 -6.78 7.11 56.52 0.40 -6.38 16 23 H -0.28 -6.82 7.11 56.52 0.40 -6.42 16 24 C 0.06 1.19 4.79 -3.82 -0.02 1.17 16 25 C -0.10 -1.42 4.88 -26.70 -0.13 -1.55 16 26 O -0.38 -4.20 8.91 -59.04 -0.53 -4.73 16 27 C 0.02 0.20 9.78 101.05 0.99 1.19 16 28 H 0.05 0.40 4.57 -51.93 -0.24 0.16 16 29 H 0.04 0.31 8.14 -51.93 -0.42 -0.11 16 30 H 0.09 0.82 8.14 -51.93 -0.42 0.40 16 31 H 0.06 0.47 7.58 -51.93 -0.39 0.07 16 32 H 0.09 0.73 8.01 -51.93 -0.42 0.31 16 33 H 0.11 1.18 7.13 -51.93 -0.37 0.81 16 34 H 0.09 1.00 6.65 -51.93 -0.35 0.66 16 35 H 0.06 0.58 8.11 -51.93 -0.42 0.16 16 36 H 0.06 0.80 8.13 -51.93 -0.42 0.38 16 37 H 0.09 1.41 5.01 -51.93 -0.26 1.15 16 38 H 0.09 1.25 8.14 -51.93 -0.42 0.83 16 39 H 0.10 1.55 6.83 -51.93 -0.35 1.20 16 40 H 0.06 0.95 5.72 -51.93 -0.30 0.65 16 41 H 0.07 1.06 8.14 -51.93 -0.42 0.64 16 42 H 0.04 0.77 5.37 -51.93 -0.28 0.49 16 43 H 0.06 1.21 8.08 -51.93 -0.42 0.79 16 44 H 0.03 0.74 8.09 -51.93 -0.42 0.32 16 45 H 0.03 0.86 8.14 -51.93 -0.42 0.44 16 46 H 0.26 7.23 8.31 -40.82 -0.34 6.89 16 47 H 0.06 1.22 8.12 -51.93 -0.42 0.79 16 48 H 0.04 0.82 4.94 -51.93 -0.26 0.56 16 49 H 0.06 0.71 8.14 -51.93 -0.42 0.29 16 50 H 0.07 0.94 8.14 -51.93 -0.42 0.52 16 51 H 0.04 0.25 7.76 -51.93 -0.40 -0.15 16 52 H 0.05 0.43 6.08 -51.93 -0.32 0.11 16 53 H 0.09 0.63 8.14 -51.93 -0.42 0.21 16 LS Contribution 387.86 15.07 5.84 5.84 Total: -1.00 -32.21 387.86 -9.06 -41.27 By element: Atomic # 1 Polarization: 9.78 SS G_CDS: -8.86 Total: 0.92 kcal Atomic # 6 Polarization: 0.37 SS G_CDS: 1.05 Total: 1.42 kcal Atomic # 7 Polarization: -44.67 SS G_CDS: -0.87 Total: -45.53 kcal Atomic # 8 Polarization: -18.98 SS G_CDS: -1.21 Total: -20.18 kcal Atomic # 14 Polarization: 21.28 SS G_CDS: -5.02 Total: 16.26 kcal Total LS contribution 5.84 Total: 5.84 kcal Total: -32.21 -9.06 -41.27 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. ZINC001274030434.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 -75.816 kcal (2) G-P(sol) polarization free energy of solvation -32.215 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -108.031 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.057 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.272 kcal (6) G-S(sol) free energy of system = (1) + (5) -117.089 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.75 seconds