Wall clock time and date at job start Tue Mar 31 2020 06:50:16 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 1.45204 * 1 3 3 C 1.34741 * 117.00051 * 2 1 4 4 O 1.21508 * 119.99962 * 359.97438 * 3 2 1 5 5 C 1.47462 * 120.00275 * 180.02562 * 3 2 1 6 6 C 1.39807 * 120.08092 * 179.97438 * 5 3 2 7 7 C 1.37648 * 119.91788 * 180.02562 * 6 5 3 8 8 C 1.39148 * 120.08109 * 359.97438 * 7 6 5 9 9 N 1.39417 * 119.91913 * 179.97438 * 8 7 6 10 10 C 1.34774 * 119.99749 * 144.11920 * 9 8 7 11 11 O 1.21281 * 119.99855 * 3.96103 * 10 9 8 12 12 C 1.50698 * 119.99968 * 183.95100 * 10 9 8 13 13 N 1.46908 * 109.46979 * 185.09057 * 12 10 9 14 14 C 1.46903 * 110.99820 * 200.08517 * 13 12 10 15 15 C 1.50698 * 109.46900 * 151.76205 * 14 13 12 16 16 H 1.07997 * 119.99780 * 2.39828 * 15 14 13 17 17 C 1.37874 * 119.99873 * 182.40171 * 15 14 13 18 18 N 1.31512 * 120.00067 * 180.02562 * 17 15 14 19 19 Si 1.86809 * 119.99944 * 359.97438 * 17 15 14 20 20 H 1.48490 * 109.47108 * 90.00339 * 19 17 15 21 21 H 1.48501 * 109.46957 * 210.00420 * 19 17 15 22 22 H 1.48499 * 109.46884 * 330.00038 * 19 17 15 23 23 C 1.46899 * 110.99770 * 76.13401 * 13 12 10 24 24 C 1.53167 * 109.54643 * 73.86902 * 23 13 12 25 25 C 1.53089 * 109.16722 * 176.84550 * 24 23 13 26 26 O 1.42910 * 109.41339 * 302.39369 * 25 24 23 27 27 C 1.42901 * 114.09784 * 61.15476 * 26 25 24 28 28 C 1.53093 * 109.41342 * 298.84215 * 27 26 25 29 29 C 1.39145 * 120.15789 * 0.27481 * 8 7 6 30 30 C 1.37646 * 120.07726 * 359.45218 * 29 8 7 31 31 H 1.08997 * 109.47162 * 59.99972 * 1 2 3 32 32 H 1.09006 * 109.47164 * 179.97438 * 1 2 3 33 33 H 1.08995 * 109.46824 * 299.99628 * 1 2 3 34 34 H 1.07997 * 120.04121 * 0.02562 * 6 5 3 35 35 H 1.08003 * 119.95873 * 179.97438 * 7 6 5 36 36 H 0.96997 * 120.00292 * 324.12189 * 9 8 7 37 37 H 1.08997 * 109.46727 * 65.09673 * 12 10 9 38 38 H 1.08997 * 109.47424 * 305.08785 * 12 10 9 39 39 H 1.08996 * 109.47092 * 271.76367 * 14 13 12 40 40 H 1.09007 * 109.47087 * 31.76048 * 14 13 12 41 41 H 0.97003 * 120.00019 * 179.97438 * 18 17 15 42 42 H 1.08998 * 109.61571 * 313.64483 * 23 13 12 43 43 H 1.09002 * 109.52279 * 296.75016 * 24 23 13 44 44 H 1.09006 * 109.52438 * 56.94013 * 24 23 13 45 45 H 1.09000 * 109.48906 * 182.41189 * 25 24 23 46 46 H 1.09004 * 109.48162 * 62.36716 * 25 24 23 47 47 H 1.08999 * 109.48046 * 178.86180 * 27 26 25 48 48 H 1.09001 * 109.49110 * 58.83520 * 27 26 25 49 49 H 1.09000 * 109.52190 * 297.70163 * 28 27 26 50 50 H 1.08998 * 109.52107 * 177.51786 * 28 27 26 51 51 H 1.07997 * 119.96102 * 179.69994 * 29 8 7 52 52 H 1.08001 * 120.03819 * 180.25105 * 30 29 8 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 1.4520 0.0000 0.0000 3 6 2.0638 1.2005 0.0000 4 8 1.4020 2.2196 -0.0005 5 6 3.5364 1.2778 -0.0006 6 6 4.1728 2.5226 -0.0011 7 6 5.5476 2.5908 -0.0022 8 6 6.3038 1.4227 -0.0022 9 7 7.6960 1.4957 -0.0038 10 6 8.4192 0.5871 0.6801 11 8 7.8631 -0.3354 1.2375 12 6 9.9188 0.7172 0.7522 13 7 10.4791 -0.4513 1.4442 14 6 11.8264 -0.1648 1.9548 15 6 12.0925 -1.0114 3.1727 16 1 11.3518 -1.7218 3.5088 17 6 13.2815 -0.8789 3.8580 18 7 13.5139 -1.6180 4.9206 19 14 14.5629 0.3497 3.2763 20 1 14.3257 1.6605 3.9324 21 1 15.9181 -0.1433 3.6308 22 1 14.4636 0.5083 1.8031 23 6 10.4884 -1.6288 0.5658 24 6 11.5959 -1.4781 -0.4815 25 6 11.6496 -2.7433 -1.3417 26 8 11.8697 -3.8791 -0.5029 27 6 10.8416 -4.0975 0.4653 28 6 10.7555 -2.8867 1.3981 29 6 5.6738 0.1821 -0.0069 30 6 4.2994 0.1063 -0.0001 31 1 -0.3633 0.5138 -0.8900 32 1 -0.3634 -1.0277 -0.0005 33 1 -0.3633 0.5138 0.8900 34 1 3.5865 3.4296 -0.0007 35 1 6.0399 3.5521 -0.0030 36 1 8.1442 2.2004 -0.4971 37 1 10.1790 1.6230 1.2999 38 1 10.3277 0.7725 -0.2567 39 1 12.5631 -0.3941 1.1849 40 1 11.8969 0.8895 2.2226 41 1 14.3506 -1.5250 5.4026 42 1 9.5240 -1.7201 0.0661 43 1 11.3841 -0.6162 -1.1142 44 1 12.5539 -1.3371 0.0191 45 1 12.4641 -2.6595 -2.0612 46 1 10.7054 -2.8618 -1.8734 47 1 11.0740 -4.9891 1.0475 48 1 9.8868 -4.2338 -0.0426 49 1 11.6964 -2.7741 1.9366 50 1 9.9427 -3.0321 2.1096 51 1 6.2638 -0.7224 -0.0118 52 1 3.8111 -0.8570 0.0003 RHF calculation, no. of doubly occupied orbitals= 71 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 ZINC000070018720.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 31 2020 06:50:16 Heat of formation + Delta-G solvation = -109.575593 kcal Electronic energy + Delta-G solvation = -34759.864266 eV Core-core repulsion = 30111.638937 eV Total energy + Delta-G solvation = -4648.225329 eV No. of doubly occupied orbitals = 71 Molecular weight (most abundant/longest-lived isotopes) = 376.188 amu Computer time = 1.23 seconds Orbital eigenvalues (eV) -40.98653 -40.43375 -39.37822 -38.35000 -36.70983 -36.42497 -34.88326 -32.59735 -31.65922 -31.36325 -30.66122 -30.59917 -28.80345 -27.85212 -26.13872 -24.19412 -23.41327 -23.14787 -23.13965 -21.55265 -21.07324 -20.36813 -18.92453 -18.30766 -18.02677 -17.22997 -17.08023 -16.69864 -16.61248 -16.22720 -15.51989 -15.48875 -15.07601 -14.90613 -14.72521 -14.53310 -14.22308 -14.16081 -13.89240 -13.79490 -13.70611 -13.60987 -13.21695 -12.94676 -12.85212 -12.71552 -12.46654 -12.39336 -11.97876 -11.62237 -11.56570 -11.53835 -11.11539 -11.10936 -10.86182 -10.83482 -10.62818 -10.57850 -10.44627 -10.33632 -10.02769 -9.76777 -9.55485 -9.42764 -9.25488 -8.96337 -8.56131 -8.47004 -7.46545 -6.06498 -4.01804 0.38728 1.11891 2.18792 2.41154 2.65690 2.83026 3.23208 3.29700 3.32529 3.54675 4.22915 4.37549 4.45859 4.46888 4.54279 4.66552 4.76669 4.78408 4.85945 5.00100 5.11976 5.14118 5.19409 5.20440 5.27216 5.28560 5.32182 5.40730 5.45826 5.56415 5.70607 5.76364 5.77970 5.81555 5.95603 5.99327 6.00836 6.02875 6.05498 6.07672 6.21219 6.27374 6.46327 6.65553 6.67762 6.69839 6.95431 7.14549 7.33257 7.46459 7.55144 7.58552 7.74994 7.84785 8.13984 8.61535 9.06041 9.53778 11.05935 Molecular weight = 376.19amu Principal moments of inertia in cm(-1) A = 0.012044 B = 0.002045 C = 0.001911 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2324.325485 B =13690.886712 C =14650.259040 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.037 3.963 2 O -0.355 6.355 3 C 0.513 3.487 4 O -0.513 6.513 5 C -0.157 4.157 6 C -0.032 4.032 7 C -0.164 4.164 8 C 0.198 3.802 9 N -0.685 5.685 10 C 0.512 3.488 11 O -0.483 6.483 12 C 0.034 3.966 13 N -0.499 5.499 14 C 0.152 3.848 15 C -0.501 4.501 16 H 0.090 0.910 17 C 0.068 3.932 18 N -0.896 5.896 19 Si 0.870 3.130 20 H -0.278 1.278 21 H -0.286 1.286 22 H -0.269 1.269 23 C 0.103 3.897 24 C -0.200 4.200 25 C 0.072 3.928 26 O -0.384 6.384 27 C 0.063 3.937 28 C -0.152 4.152 29 C -0.138 4.138 30 C -0.038 4.038 31 H 0.063 0.937 32 H 0.102 0.898 33 H 0.063 0.937 34 H 0.139 0.861 35 H 0.136 0.864 36 H 0.412 0.588 37 H 0.105 0.895 38 H 0.060 0.940 39 H 0.012 0.988 40 H 0.018 0.982 41 H 0.263 0.737 42 H 0.064 0.936 43 H 0.059 0.941 44 H 0.093 0.907 45 H 0.085 0.915 46 H 0.040 0.960 47 H 0.091 0.909 48 H 0.037 0.963 49 H 0.118 0.882 50 H 0.074 0.926 51 H 0.148 0.852 52 H 0.140 0.860 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -17.107 5.649 -15.764 23.939 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 -0.057 4.057 2 O -0.272 6.272 3 C 0.359 3.641 4 O -0.403 6.403 5 C -0.159 4.159 6 C -0.051 4.051 7 C -0.185 4.185 8 C 0.101 3.899 9 N -0.331 5.331 10 C 0.299 3.701 11 O -0.353 6.353 12 C -0.098 4.098 13 N -0.222 5.222 14 C 0.027 3.973 15 C -0.539 4.539 16 H 0.107 0.893 17 C -0.133 4.133 18 N -0.535 5.535 19 Si 0.697 3.303 20 H -0.204 1.204 21 H -0.212 1.212 22 H -0.194 1.194 23 C -0.006 4.006 24 C -0.239 4.239 25 C -0.006 4.006 26 O -0.303 6.303 27 C -0.014 4.014 28 C -0.190 4.190 29 C -0.158 4.158 30 C -0.057 4.057 31 H 0.081 0.919 32 H 0.121 0.879 33 H 0.082 0.918 34 H 0.157 0.843 35 H 0.154 0.846 36 H 0.248 0.752 37 H 0.123 0.877 38 H 0.077 0.923 39 H 0.029 0.971 40 H 0.036 0.964 41 H 0.073 0.927 42 H 0.082 0.918 43 H 0.077 0.923 44 H 0.112 0.888 45 H 0.103 0.897 46 H 0.058 0.942 47 H 0.109 0.891 48 H 0.055 0.945 49 H 0.136 0.864 50 H 0.093 0.907 51 H 0.166 0.834 52 H 0.158 0.842 Dipole moment (debyes) X Y Z Total from point charges -17.635 4.964 -14.750 23.520 hybrid contribution 0.995 1.687 -1.027 2.212 sum -16.640 6.651 -15.777 23.875 Atomic orbital electron populations 1.23282 0.75972 1.03820 1.02597 1.86562 1.23564 1.32700 1.84338 1.21169 0.89164 0.81356 0.72381 1.90828 1.66915 1.36027 1.46512 1.19017 0.88829 0.95070 1.12983 1.20982 0.93731 0.96705 0.93668 1.20868 0.93416 0.97500 1.06690 1.18081 0.83288 0.93961 0.94530 1.43757 1.04198 1.33277 1.51890 1.21312 0.90492 0.81247 0.77064 1.90718 1.71984 1.30615 1.42018 1.22034 0.89919 0.98134 0.99739 1.61865 1.25790 1.00786 1.33743 1.20515 0.83759 0.96708 0.96332 1.21060 1.02799 1.21514 1.08570 0.89257 1.24895 0.97899 0.95753 0.94782 1.69876 1.25129 1.40028 1.18450 0.86962 0.81814 0.82120 0.79384 1.20375 1.21205 1.19423 1.21522 0.95729 0.92032 0.91277 1.23039 1.03663 0.97931 0.99290 1.22378 1.00304 0.85734 0.92197 1.87896 1.47414 1.46519 1.48489 1.22669 0.89773 0.98987 0.89989 1.22492 1.06711 0.91701 0.98079 1.21315 0.94374 0.97845 1.02295 1.21358 0.93257 0.97960 0.93140 0.91863 0.87918 0.91793 0.84280 0.84618 0.75227 0.87710 0.92270 0.97097 0.96393 0.92655 0.91797 0.92272 0.88833 0.89716 0.94152 0.89100 0.94455 0.86420 0.90740 0.83447 0.84183 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 0.04 0.25 10.57 101.05 1.07 1.32 16 2 O -0.36 -3.55 9.81 -40.60 -0.40 -3.95 16 3 C 0.51 5.92 7.89 34.49 0.27 6.19 16 4 O -0.51 -6.88 16.13 -19.27 -0.31 -7.19 16 5 C -0.16 -1.71 5.88 -104.97 -0.62 -2.33 16 6 C -0.03 -0.31 9.58 -39.21 -0.38 -0.69 16 7 C -0.16 -1.48 9.94 -39.46 -0.39 -1.87 16 8 C 0.20 2.13 6.27 -83.74 -0.53 1.60 16 9 N -0.68 -6.82 5.31 -9.86 -0.05 -6.88 16 10 C 0.51 7.09 7.18 -10.99 -0.08 7.01 16 11 O -0.48 -8.56 13.07 5.56 0.07 -8.49 16 12 C 0.03 0.48 5.38 -4.97 -0.03 0.45 16 13 N -0.50 -9.43 3.91 -229.30 -0.90 -10.32 16 14 C 0.15 3.31 3.61 -4.98 -0.02 3.29 16 15 C -0.50 -13.26 7.60 -34.44 -0.26 -13.52 16 16 H 0.09 2.62 6.81 -52.49 -0.36 2.26 16 17 C 0.07 1.89 5.47 -17.82 -0.10 1.79 16 18 N -0.90 -26.54 13.96 55.43 0.77 -25.77 16 19 Si 0.87 20.42 27.42 -169.99 -4.66 15.76 16 20 H -0.28 -6.45 7.11 56.52 0.40 -6.05 16 21 H -0.29 -6.80 7.11 56.52 0.40 -6.40 16 22 H -0.27 -5.97 6.61 56.52 0.37 -5.59 16 23 C 0.10 1.80 1.95 -67.53 -0.13 1.67 16 24 C -0.20 -3.12 4.80 -26.60 -0.13 -3.25 16 25 C 0.07 1.02 6.84 37.20 0.25 1.28 16 26 O -0.38 -6.59 10.77 -35.23 -0.38 -6.97 16 27 C 0.06 1.02 6.84 37.21 0.25 1.28 16 28 C -0.15 -2.91 4.50 -26.59 -0.12 -3.03 16 29 C -0.14 -1.62 8.65 -39.46 -0.34 -1.97 16 30 C -0.04 -0.41 9.60 -39.21 -0.38 -0.78 16 31 H 0.06 0.41 8.14 -51.93 -0.42 -0.02 16 32 H 0.10 0.42 8.14 -51.93 -0.42 -0.01 16 33 H 0.06 0.43 8.14 -51.93 -0.42 0.01 16 34 H 0.14 1.22 7.64 -52.49 -0.40 0.82 16 35 H 0.14 0.87 8.06 -52.48 -0.42 0.45 16 36 H 0.41 2.60 8.82 -40.82 -0.36 2.24 16 37 H 0.10 1.37 7.51 -51.93 -0.39 0.98 16 38 H 0.06 0.68 6.47 -51.93 -0.34 0.35 16 39 H 0.01 0.25 4.16 -51.93 -0.22 0.04 16 40 H 0.02 0.39 6.73 -51.92 -0.35 0.04 16 41 H 0.26 7.37 8.31 -40.82 -0.34 7.03 16 42 H 0.06 1.08 6.93 -51.93 -0.36 0.72 16 43 H 0.06 0.78 6.76 -51.93 -0.35 0.43 16 44 H 0.09 1.71 5.67 -51.93 -0.29 1.42 16 45 H 0.08 1.06 8.14 -51.93 -0.42 0.63 16 46 H 0.04 0.51 8.14 -51.93 -0.42 0.09 16 47 H 0.09 1.40 8.14 -51.93 -0.42 0.97 16 48 H 0.04 0.54 8.14 -51.93 -0.42 0.12 16 49 H 0.12 2.71 5.35 -51.93 -0.28 2.43 16 50 H 0.07 1.50 8.14 -51.93 -0.42 1.08 16 51 H 0.15 1.93 6.31 -52.49 -0.33 1.60 16 52 H 0.14 1.29 7.60 -52.49 -0.40 0.89 16 LS Contribution 411.99 15.07 6.21 6.21 Total: -1.00 -33.96 411.99 -8.67 -42.63 By element: Atomic # 1 Polarization: 13.93 SS G_CDS: -7.39 Total: 6.54 kcal Atomic # 6 Polarization: 0.07 SS G_CDS: -1.64 Total: -1.58 kcal Atomic # 7 Polarization: -42.79 SS G_CDS: -0.17 Total: -42.96 kcal Atomic # 8 Polarization: -25.58 SS G_CDS: -1.02 Total: -26.60 kcal Atomic # 14 Polarization: 20.42 SS G_CDS: -4.66 Total: 15.76 kcal Total LS contribution 6.21 Total: 6.21 kcal Total: -33.96 -8.67 -42.63 kcal The number of atoms in the molecule is 52 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. ZINC000070018720.mol2 52 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 -66.943 kcal (2) G-P(sol) polarization free energy of solvation -33.959 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -100.902 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.674 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.633 kcal (6) G-S(sol) free energy of system = (1) + (5) -109.576 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.23 seconds