Wall clock time and date at job start Sat Apr 11 2020 06:10:44 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 1.53005 * 1 3 3 O 1.42902 * 109.46638 * 2 1 4 4 C 1.42902 * 113.99697 * 179.97438 * 3 2 1 5 5 C 1.52998 * 109.47322 * 179.97438 * 4 3 2 6 6 H 1.09002 * 109.46965 * 54.99947 * 5 4 3 7 7 O 1.42905 * 109.47377 * 295.00608 * 5 4 3 8 8 C 1.52997 * 109.47573 * 175.00187 * 5 4 3 9 9 N 1.46896 * 109.47545 * 185.00346 * 8 5 4 10 10 C 1.48625 * 110.99865 * 287.45163 * 9 8 5 11 11 C 1.55164 * 103.35955 * 200.85197 * 10 9 8 12 12 C 1.53612 * 102.65806 * 36.58509 * 11 10 9 13 13 C 1.53634 * 110.82468 * 99.45566 * 12 11 10 14 14 C 1.54880 * 101.43218 * 96.68117 * 13 12 11 15 15 N 1.46880 * 105.42958 * 24.88213 * 14 13 12 16 16 C 1.46500 * 124.37410 * 163.04653 * 15 14 13 17 17 C 1.52997 * 109.47473 * 269.72824 * 16 15 14 18 18 C 1.50701 * 109.47212 * 179.97438 * 17 16 15 19 19 H 1.07998 * 120.00129 * 0.02562 * 18 17 16 20 20 C 1.37880 * 119.99861 * 179.97438 * 18 17 16 21 21 N 1.31510 * 119.99913 * 0.02562 * 20 18 17 22 22 Si 1.86797 * 119.99734 * 180.02562 * 20 18 17 23 23 H 1.48499 * 109.47094 * 90.00289 * 22 20 18 24 24 H 1.48505 * 109.47195 * 210.00171 * 22 20 18 25 25 H 1.48493 * 109.47449 * 330.00136 * 22 20 18 26 26 C 1.34754 * 111.25553 * 342.78590 * 15 14 13 27 27 O 1.21285 * 125.13533 * 181.28276 * 26 15 14 28 28 C 1.48184 * 111.00154 * 170.00026 * 9 8 5 29 29 H 1.08997 * 109.47145 * 299.99604 * 1 2 3 30 30 H 1.09003 * 109.47134 * 59.99867 * 1 2 3 31 31 H 1.09002 * 109.46780 * 179.97438 * 1 2 3 32 32 H 1.08997 * 109.47145 * 240.00396 * 2 1 3 33 33 H 1.08996 * 109.47428 * 119.99875 * 2 1 3 34 34 H 1.09006 * 109.47276 * 60.00469 * 4 3 2 35 35 H 1.09002 * 109.47666 * 300.00565 * 4 3 2 36 36 H 0.96700 * 113.99587 * 299.99970 * 7 5 4 37 37 H 1.09004 * 109.47055 * 65.00194 * 8 5 4 38 38 H 1.09001 * 109.46999 * 305.00739 * 8 5 4 39 39 H 1.09001 * 110.64152 * 319.32254 * 10 9 8 40 40 H 1.09002 * 110.64194 * 82.22425 * 10 9 8 41 41 H 1.08993 * 110.77434 * 278.29590 * 11 10 9 42 42 H 1.09000 * 110.77321 * 154.87992 * 11 10 9 43 43 H 1.08998 * 111.01883 * 214.95100 * 13 12 11 44 44 H 1.08997 * 111.02252 * 338.84395 * 13 12 11 45 45 H 1.08997 * 110.39509 * 265.84579 * 14 13 12 46 46 H 1.09000 * 110.17573 * 143.80788 * 14 13 12 47 47 H 1.09002 * 109.47129 * 149.72567 * 16 15 14 48 48 H 1.08998 * 109.46845 * 29.73374 * 16 15 14 49 49 H 1.09002 * 109.47153 * 59.99757 * 17 16 15 50 50 H 1.09001 * 109.46832 * 299.99948 * 17 16 15 51 51 H 0.97002 * 119.99768 * 179.97438 * 21 20 18 52 52 H 1.09001 * 110.02174 * 26.33676 * 28 9 8 53 53 H 1.09001 * 110.05914 * 264.95918 * 28 9 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 6 1.5300 0.0000 0.0000 3 8 2.0063 1.3473 0.0000 4 6 3.4308 1.4602 0.0006 5 6 3.8253 2.9385 -0.0001 6 1 3.3491 3.4420 0.8412 7 8 3.3985 3.5449 -1.2217 8 6 5.3452 3.0609 0.1262 9 7 5.7141 4.4777 0.2460 10 6 5.5490 5.1826 -1.0520 11 6 6.4560 6.4323 -0.8992 12 6 7.6459 5.8882 -0.0943 13 6 8.8325 5.5744 -1.0183 14 6 9.6804 6.8628 -0.8775 15 7 9.3172 7.4289 0.4282 16 6 10.1061 8.4365 1.1413 17 6 11.1171 7.7403 2.0546 18 6 11.9290 8.7769 2.7876 19 1 11.7424 9.8273 2.6192 20 6 12.9095 8.3844 3.6739 21 7 13.1364 7.1054 3.8793 22 14 13.9154 9.6693 4.5830 23 1 13.2432 10.0100 5.8625 24 1 15.2701 9.1297 4.8640 25 1 14.0328 10.8898 3.7453 26 6 8.1616 6.9058 0.8831 27 8 7.6194 7.2108 1.9242 28 6 7.1434 4.6255 0.6083 29 1 -0.3633 0.5138 0.8900 30 1 -0.3633 0.5139 -0.8900 31 1 -0.3633 -1.0277 -0.0005 32 1 1.8934 -0.5138 -0.8900 33 1 1.8934 -0.5138 0.8899 34 1 3.8340 0.9766 -0.8892 35 1 3.8333 0.9767 0.8907 36 1 3.7836 3.1464 -2.0141 37 1 5.8187 2.6357 -0.7588 38 1 5.6807 2.5218 1.0122 39 1 5.8926 4.5568 -1.8756 40 1 4.5096 5.4751 -1.2009 41 1 5.9418 7.2178 -0.3456 42 1 6.7820 6.7949 -1.8740 43 1 9.3810 4.7004 -0.6671 44 1 8.5012 5.4383 -2.0478 45 1 9.4376 7.5662 -1.6740 46 1 10.7424 6.6184 -0.9002 47 1 9.4428 9.0593 1.7415 48 1 10.6361 9.0596 0.4208 49 1 11.7803 7.1175 1.4543 50 1 10.5870 7.1173 2.7750 51 1 13.8265 6.8293 4.5027 52 1 7.7070 3.7580 0.2649 53 1 7.2461 4.7334 1.6881 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 ZINC001274564472.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 06:10:44 Heat of formation + Delta-G solvation = -129.240383 kcal Electronic energy + Delta-G solvation = -30296.770354 eV Core-core repulsion = 26168.203812 eV Total energy + Delta-G solvation = -4128.566542 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.76 seconds Orbital eigenvalues (eV) -40.94880 -39.19343 -38.03110 -36.66609 -35.90499 -33.94220 -32.71873 -32.01490 -30.96522 -29.33778 -29.13175 -28.00425 -25.61851 -24.82718 -23.29659 -23.17816 -22.13856 -21.84164 -21.19314 -20.16237 -18.57548 -17.44857 -17.03224 -16.65424 -16.50927 -16.30254 -15.74814 -15.47594 -15.25952 -15.17637 -14.80972 -14.41477 -14.19219 -14.09498 -13.66168 -13.54786 -13.30999 -13.00277 -12.80876 -12.67130 -12.63009 -12.26225 -12.21766 -12.11637 -11.90743 -11.87304 -11.75580 -11.68743 -11.37269 -11.28319 -11.04841 -10.95834 -10.93925 -10.70239 -10.60554 -10.16723 -10.00692 -9.98386 -9.86599 -9.32045 -9.06470 -8.52799 -8.37385 -7.99150 -6.02635 -4.05998 2.99010 3.09199 3.32037 3.37769 3.40357 3.57293 3.85805 4.08626 4.32763 4.37754 4.45626 4.51427 4.58855 4.62839 4.69557 4.74710 4.85164 4.89171 4.92608 4.94862 5.01965 5.09498 5.14707 5.24602 5.30407 5.33579 5.34107 5.43898 5.48757 5.49792 5.69437 5.71124 5.74483 5.77090 5.78819 5.91170 5.95573 6.05231 6.11960 6.13557 6.48284 6.71758 6.75742 6.81867 6.87908 7.03611 7.35957 7.51703 7.67330 7.86202 7.97425 8.33832 8.72133 9.00790 9.58099 11.08786 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.022432 B = 0.001886 C = 0.001807 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1247.935545 B =14842.794156 C =15491.974043 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.151 4.151 2 C 0.056 3.944 3 O -0.378 6.378 4 C 0.032 3.968 5 C 0.116 3.884 6 H 0.116 0.884 7 O -0.546 6.546 8 C 0.018 3.982 9 N -0.506 5.506 10 C 0.043 3.957 11 C -0.102 4.102 12 C -0.106 4.106 13 C -0.123 4.123 14 C 0.103 3.897 15 N -0.613 5.613 16 C 0.128 3.872 17 C 0.012 3.988 18 C -0.522 4.522 19 H 0.057 0.943 20 C 0.059 3.941 21 N -0.893 5.893 22 Si 0.895 3.105 23 H -0.280 1.280 24 H -0.286 1.286 25 H -0.273 1.273 26 C 0.527 3.473 27 O -0.522 6.522 28 C 0.060 3.940 29 H 0.064 0.936 30 H 0.063 0.937 31 H 0.070 0.930 32 H 0.046 0.954 33 H 0.047 0.953 34 H 0.049 0.951 35 H 0.059 0.941 36 H 0.366 0.634 37 H 0.040 0.960 38 H 0.086 0.914 39 H 0.041 0.959 40 H 0.100 0.900 41 H 0.081 0.919 42 H 0.078 0.922 43 H 0.082 0.918 44 H 0.085 0.915 45 H 0.066 0.934 46 H 0.080 0.920 47 H 0.070 0.930 48 H 0.065 0.935 49 H 0.017 0.983 50 H 0.020 0.980 51 H 0.261 0.739 52 H 0.052 0.948 53 H 0.091 0.909 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -18.790 -14.902 -16.034 28.848 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 -0.021 4.021 3 O -0.297 6.297 4 C -0.045 4.045 5 C 0.057 3.943 6 H 0.134 0.866 7 O -0.350 6.350 8 C -0.111 4.111 9 N -0.229 5.229 10 C -0.085 4.085 11 C -0.140 4.140 12 C -0.110 4.110 13 C -0.161 4.161 14 C -0.021 4.021 15 N -0.346 5.346 16 C 0.008 3.992 17 C -0.026 4.026 18 C -0.561 4.561 19 H 0.075 0.925 20 C -0.143 4.143 21 N -0.532 5.532 22 Si 0.723 3.277 23 H -0.206 1.206 24 H -0.212 1.212 25 H -0.198 1.198 26 C 0.313 3.687 27 O -0.398 6.398 28 C -0.068 4.068 29 H 0.083 0.917 30 H 0.082 0.918 31 H 0.089 0.911 32 H 0.064 0.936 33 H 0.065 0.935 34 H 0.068 0.932 35 H 0.077 0.923 36 H 0.213 0.787 37 H 0.059 0.941 38 H 0.104 0.896 39 H 0.059 0.941 40 H 0.118 0.882 41 H 0.099 0.901 42 H 0.096 0.904 43 H 0.101 0.899 44 H 0.104 0.896 45 H 0.084 0.916 46 H 0.099 0.901 47 H 0.089 0.911 48 H 0.083 0.917 49 H 0.035 0.965 50 H 0.039 0.961 51 H 0.070 0.930 52 H 0.070 0.930 53 H 0.110 0.890 Dipole moment (debyes) X Y Z Total from point charges -19.701 -14.033 -14.513 28.208 hybrid contribution 1.941 -0.558 -0.378 2.055 sum -17.760 -14.591 -14.891 27.387 Atomic orbital electron populations 1.21738 0.93611 1.02186 1.03331 1.22482 0.95808 0.83894 0.99913 1.87974 1.20253 1.26117 1.95349 1.23212 0.82363 0.98179 1.00781 1.21909 0.92824 0.90618 0.88971 0.86597 1.86700 1.72442 1.60791 1.15037 1.22870 0.95772 0.90780 1.01687 1.64785 1.19281 1.10392 1.28492 1.23411 1.01359 0.94079 0.89621 1.22382 0.93973 0.98380 0.99301 1.21511 0.96673 0.96377 0.96475 1.22746 0.95277 0.98301 0.99738 1.22074 1.00353 0.94082 0.85584 1.48632 1.23471 1.42267 1.20231 1.21793 0.93533 0.89113 0.94778 1.19401 0.92845 0.96275 0.94042 1.21097 1.17831 0.92904 1.24289 0.92461 1.24999 0.97233 0.95311 0.96714 1.69974 1.32763 1.14532 1.35922 0.86545 0.79357 0.81583 0.80226 1.20563 1.21223 1.19807 1.20099 0.80740 0.82089 0.85777 1.90711 1.61540 1.63544 1.23976 1.22713 0.87501 0.94635 1.01969 0.91730 0.91775 0.91148 0.93582 0.93453 0.93231 0.92315 0.78741 0.94146 0.89609 0.94117 0.88206 0.90056 0.90350 0.89902 0.89597 0.91602 0.90134 0.91133 0.91681 0.96515 0.96118 0.92958 0.93018 0.89038 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 -0.89 10.28 37.16 0.38 -0.51 16 2 C 0.06 0.38 6.66 37.16 0.25 0.62 16 3 O -0.38 -3.59 10.31 -40.08 -0.41 -4.00 16 4 C 0.03 0.24 5.57 37.16 0.21 0.44 16 5 C 0.12 1.01 3.46 -26.73 -0.09 0.92 16 6 H 0.12 1.26 8.14 -51.93 -0.42 0.83 16 7 O -0.55 -4.92 10.68 -40.08 -0.43 -5.35 16 8 C 0.02 0.15 4.53 -3.83 -0.02 0.14 16 9 N -0.51 -5.87 5.26 -230.62 -1.21 -7.08 16 10 C 0.04 0.43 5.33 -1.72 -0.01 0.42 16 11 C -0.10 -1.18 6.11 -25.27 -0.15 -1.33 16 12 C -0.11 -1.43 0.77 -155.25 -0.12 -1.55 16 13 C -0.12 -1.34 6.08 -25.41 -0.15 -1.49 16 14 C 0.10 1.36 7.37 -2.84 -0.02 1.34 16 15 N -0.61 -11.22 2.94 -172.42 -0.51 -11.73 16 16 C 0.13 2.74 5.89 -4.04 -0.02 2.72 16 17 C 0.01 0.32 5.30 -27.88 -0.15 0.18 16 18 C -0.52 -14.92 9.11 -34.44 -0.31 -15.23 16 19 H 0.06 1.57 7.74 -52.49 -0.41 1.16 16 20 C 0.06 1.71 5.46 -17.82 -0.10 1.61 16 21 N -0.89 -27.09 13.29 55.43 0.74 -26.36 16 22 Si 0.90 21.82 29.54 -169.99 -5.02 16.79 16 23 H -0.28 -6.79 7.11 56.52 0.40 -6.38 16 24 H -0.29 -6.87 7.11 56.52 0.40 -6.47 16 25 H -0.27 -6.46 7.11 56.52 0.40 -6.06 16 26 C 0.53 9.98 6.63 -11.23 -0.07 9.90 16 27 O -0.52 -12.21 17.17 5.55 0.10 -12.12 16 28 C 0.06 0.78 5.97 -3.12 -0.02 0.76 16 29 H 0.06 0.41 8.14 -51.93 -0.42 -0.01 16 30 H 0.06 0.40 8.14 -51.93 -0.42 -0.02 16 31 H 0.07 0.29 8.14 -51.93 -0.42 -0.14 16 32 H 0.05 0.26 8.14 -51.93 -0.42 -0.16 16 33 H 0.05 0.28 8.14 -51.93 -0.42 -0.14 16 34 H 0.05 0.29 8.14 -51.93 -0.42 -0.14 16 35 H 0.06 0.38 8.14 -51.93 -0.42 -0.04 16 36 H 0.37 2.02 9.05 45.56 0.41 2.43 16 37 H 0.04 0.28 7.83 -51.93 -0.41 -0.12 16 38 H 0.09 0.71 8.08 -51.93 -0.42 0.29 16 39 H 0.04 0.33 7.80 -51.93 -0.41 -0.07 16 40 H 0.10 1.06 6.82 -51.93 -0.35 0.70 16 41 H 0.08 1.12 7.92 -51.93 -0.41 0.71 16 42 H 0.08 0.73 7.64 -51.93 -0.40 0.33 16 43 H 0.08 0.89 7.62 -51.93 -0.40 0.50 16 44 H 0.09 0.69 7.67 -51.93 -0.40 0.29 16 45 H 0.07 0.73 8.14 -51.93 -0.42 0.31 16 46 H 0.08 1.08 8.14 -51.93 -0.42 0.66 16 47 H 0.07 1.60 7.93 -51.93 -0.41 1.19 16 48 H 0.06 1.27 8.14 -51.93 -0.42 0.84 16 49 H 0.02 0.45 8.14 -51.93 -0.42 0.03 16 50 H 0.02 0.61 8.14 -51.93 -0.42 0.19 16 51 H 0.26 7.45 8.31 -40.82 -0.34 7.11 16 52 H 0.05 0.57 7.06 -51.93 -0.37 0.21 16 53 H 0.09 1.47 7.46 -51.93 -0.39 1.09 16 LS Contribution 419.81 15.07 6.33 6.33 Total: -1.00 -35.67 419.81 -9.81 -45.48 By element: Atomic # 1 Polarization: 8.08 SS G_CDS: -8.98 Total: -0.90 kcal Atomic # 6 Polarization: -0.66 SS G_CDS: -0.41 Total: -1.07 kcal Atomic # 7 Polarization: -44.18 SS G_CDS: -0.98 Total: -45.17 kcal Atomic # 8 Polarization: -20.72 SS G_CDS: -0.75 Total: -21.47 kcal Atomic # 14 Polarization: 21.82 SS G_CDS: -5.02 Total: 16.79 kcal Total LS contribution 6.33 Total: 6.33 kcal Total: -35.67 -9.81 -45.48 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. ZINC001274564472.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 -83.762 kcal (2) G-P(sol) polarization free energy of solvation -35.668 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -119.431 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.810 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.478 kcal (6) G-S(sol) free energy of system = (1) + (5) -129.240 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.76 seconds