Wall clock time and date at job start Sat Apr 11 2020 06:12:53 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 1.52997 * 1 3 3 C 1.53006 * 109.47127 * 2 1 4 4 C 1.52997 * 109.47127 * 179.97438 * 3 2 1 5 5 H 1.09002 * 109.47196 * 304.99671 * 4 3 2 6 6 N 1.46500 * 109.47520 * 64.99751 * 4 3 2 7 7 C 1.34782 * 119.99889 * 59.99796 * 6 4 3 8 8 N 1.34771 * 119.99657 * 180.02562 * 7 6 4 9 9 O 1.21582 * 120.00012 * 0.02562 * 7 6 4 10 10 C 1.50701 * 109.47348 * 184.99767 * 4 3 2 11 11 O 1.21276 * 120.00139 * 260.00045 * 10 4 3 12 12 N 1.34779 * 119.99918 * 79.99776 * 10 4 3 13 13 C 1.47489 * 127.03156 * 0.02562 * 12 10 4 14 14 C 1.54008 * 107.08133 * 154.51806 * 13 12 10 15 15 H 1.09001 * 110.32777 * 120.19552 * 14 13 12 16 16 C 1.53000 * 110.33020 * 242.31676 * 14 13 12 17 17 C 1.54624 * 105.04169 * 1.30905 * 14 13 12 18 18 H 1.09001 * 110.74212 * 263.50899 * 17 14 13 19 19 C 1.53002 * 110.73831 * 140.18508 * 17 14 13 20 20 C 1.52997 * 109.47060 * 174.99731 * 19 17 14 21 21 N 1.46506 * 109.46999 * 180.02562 * 20 19 17 22 22 C 1.36938 * 119.99643 * 180.02562 * 21 20 19 23 23 H 1.07995 * 120.00493 * 0.02562 * 22 21 20 24 24 C 1.38814 * 119.99638 * 180.02562 * 22 21 20 25 25 N 1.31620 * 120.00305 * 359.97438 * 24 22 21 26 26 Si 1.86796 * 119.99955 * 180.02562 * 24 22 21 27 27 H 1.48497 * 109.47515 * 59.99906 * 26 24 22 28 28 H 1.48503 * 109.47125 * 179.97438 * 26 24 22 29 29 H 1.48508 * 109.47285 * 299.99577 * 26 24 22 30 30 C 1.48111 * 127.03468 * 179.71154 * 12 10 4 31 31 H 1.09002 * 109.47153 * 180.02562 * 1 2 3 32 32 H 1.09001 * 109.46832 * 60.00321 * 1 2 3 33 33 H 1.09004 * 109.47261 * 300.00303 * 1 2 3 34 34 H 1.08998 * 109.47533 * 119.99499 * 2 1 3 35 35 H 1.08996 * 109.47853 * 239.99841 * 2 1 3 36 36 H 1.09001 * 109.47002 * 299.99574 * 3 2 1 37 37 H 1.08993 * 109.46955 * 60.00011 * 3 2 1 38 38 H 0.97003 * 120.00455 * 240.00645 * 6 4 3 39 39 H 0.96997 * 120.00710 * 359.97438 * 8 7 6 40 40 H 0.97002 * 119.99687 * 179.97438 * 8 7 6 41 41 H 1.08993 * 109.91671 * 273.88083 * 13 12 10 42 42 H 1.09002 * 109.91016 * 35.16349 * 13 12 10 43 43 H 1.09000 * 109.47317 * 58.54112 * 16 14 13 44 44 H 1.08998 * 109.47281 * 178.54895 * 16 14 13 45 45 H 1.08998 * 109.46857 * 298.54742 * 16 14 13 46 46 H 1.08998 * 109.47322 * 294.99827 * 19 17 14 47 47 H 1.09003 * 109.46826 * 55.00188 * 19 17 14 48 48 H 1.08997 * 109.47595 * 299.99953 * 20 19 17 49 49 H 1.08995 * 109.47277 * 60.00006 * 20 19 17 50 50 H 0.96994 * 119.99850 * 0.02562 * 21 20 19 51 51 H 0.97000 * 120.00245 * 180.02562 * 25 24 22 52 52 H 1.08999 * 110.66266 * 337.77433 * 30 12 10 53 53 H 1.09002 * 110.66615 * 100.88178 * 30 12 10 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 2.0400 1.4426 0.0000 4 6 3.5700 1.4426 0.0006 5 1 3.9330 0.8533 0.8427 6 7 4.0589 0.8586 -1.2508 7 6 3.7338 1.4238 -2.4304 8 7 4.1832 0.8862 -3.5817 9 8 3.0352 2.4185 -2.4559 10 6 4.0723 2.8580 0.1244 11 8 4.4468 3.4569 -0.8614 12 7 4.1053 3.4583 1.3307 13 6 3.6910 2.8795 2.6225 14 6 4.4745 3.6204 3.7221 15 1 3.7873 4.1127 4.4103 16 6 5.3772 2.6452 4.4805 17 6 5.3256 4.6700 2.9706 18 1 6.3353 4.2969 2.7988 19 6 5.3586 5.9921 3.7398 20 6 6.3060 6.9670 3.0379 21 7 6.3381 8.2329 3.7748 22 6 7.1224 9.2638 3.3309 23 1 7.7171 9.1440 2.4374 24 6 7.1532 10.4630 4.0294 25 7 6.4281 10.6093 5.1181 26 14 8.2226 11.8696 3.4235 27 1 7.7967 12.2619 2.0561 28 1 8.0785 13.0306 4.3383 29 1 9.6423 11.4351 3.3943 30 6 4.5710 4.8318 1.6312 31 1 -0.3633 -1.0277 0.0005 32 1 -0.3633 0.5138 -0.8900 33 1 -0.3634 0.5139 0.8900 34 1 1.8934 -0.5137 0.8900 35 1 1.8934 -0.5138 -0.8899 36 1 1.6767 1.9564 -0.8900 37 1 1.6767 1.9563 0.8899 38 1 4.6166 0.0651 -1.2305 39 1 4.7409 0.0929 -3.5614 40 1 3.9490 1.2928 -4.4307 41 1 2.6205 3.0241 2.7678 42 1 3.9316 1.8167 2.6473 43 1 6.0662 2.1699 3.7823 44 1 5.9435 3.1879 5.2373 45 1 4.7648 1.8829 4.9621 46 1 4.3562 6.4191 3.7717 47 1 5.7095 5.8126 4.7561 48 1 7.3084 6.5402 3.0060 49 1 5.9552 7.1466 2.0217 50 1 5.8037 8.3406 4.5771 51 1 6.4493 11.4474 5.6060 52 1 5.2444 5.1886 0.8519 53 1 3.7243 5.5081 1.7484 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 ZINC001104952359.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 06:12:53 Heat of formation + Delta-G solvation = -67.210011 kcal Electronic energy + Delta-G solvation = -30775.280205 eV Core-core repulsion = 26681.696252 eV Total energy + Delta-G solvation = -4093.583952 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.81 seconds Orbital eigenvalues (eV) -40.86678 -39.60376 -37.85185 -36.09282 -35.08190 -34.05260 -33.20372 -33.13998 -32.02163 -30.33903 -29.31391 -27.06811 -26.53605 -25.01812 -23.82905 -22.50044 -22.12178 -21.02980 -20.61528 -20.02192 -19.22764 -18.83931 -17.48849 -17.06693 -16.87400 -16.10894 -15.82998 -15.35872 -15.03891 -14.82114 -14.59276 -14.32080 -14.28347 -14.04366 -13.84282 -13.49386 -13.36925 -13.22591 -13.06770 -13.01356 -12.72940 -12.32809 -12.28123 -11.99278 -11.67027 -11.61928 -11.41374 -11.32679 -11.19734 -11.05311 -10.96520 -10.77273 -10.56045 -10.40106 -10.30168 -10.25141 -9.94799 -9.92941 -9.72366 -9.61777 -9.04927 -8.81133 -8.63322 -6.86491 -5.71462 -2.99683 2.45578 2.69328 2.98068 3.29428 3.48548 3.52309 3.53829 4.18005 4.27620 4.42855 4.51286 4.56174 4.62447 4.69438 4.72971 4.78803 4.90712 5.09703 5.21126 5.29485 5.32618 5.35294 5.39344 5.47853 5.53132 5.57057 5.58213 5.64225 5.77172 5.79327 5.82967 5.87713 5.93024 5.98535 6.03297 6.04328 6.10585 6.17688 6.26210 6.33707 6.42441 6.46087 6.50742 6.75963 6.90787 6.94554 7.55355 7.75257 7.76891 8.21769 8.47991 8.59373 9.58771 10.17384 10.52036 11.51567 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.015136 B = 0.002241 C = 0.002062 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1849.450851 B =12493.984937 C =13578.860986 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.152 4.152 2 C -0.116 4.116 3 C -0.135 4.135 4 C 0.160 3.840 5 H 0.106 0.894 6 N -0.734 5.734 7 C 0.710 3.290 8 N -0.871 5.871 9 O -0.562 6.562 10 C 0.516 3.484 11 O -0.505 6.505 12 N -0.623 5.623 13 C 0.104 3.896 14 C -0.104 4.104 15 H 0.088 0.912 16 C -0.142 4.142 17 C -0.090 4.090 18 H 0.082 0.918 19 C -0.114 4.114 20 C 0.152 3.848 21 N -0.734 5.734 22 C -0.238 4.238 23 H 0.069 0.931 24 C -0.016 4.016 25 N -0.935 5.935 26 Si 0.907 3.093 27 H -0.286 1.286 28 H -0.291 1.291 29 H -0.286 1.286 30 C 0.111 3.889 31 H 0.053 0.947 32 H 0.054 0.946 33 H 0.055 0.945 34 H 0.060 0.940 35 H 0.061 0.939 36 H 0.096 0.904 37 H 0.074 0.926 38 H 0.398 0.602 39 H 0.392 0.608 40 H 0.413 0.587 41 H 0.067 0.933 42 H 0.071 0.929 43 H 0.054 0.946 44 H 0.063 0.937 45 H 0.055 0.945 46 H 0.065 0.935 47 H 0.067 0.933 48 H 0.017 0.983 49 H 0.019 0.981 50 H 0.383 0.617 51 H 0.255 0.745 52 H 0.084 0.916 53 H 0.074 0.926 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -8.978 -31.160 -8.371 33.491 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 -0.153 4.153 3 C -0.174 4.174 4 C 0.050 3.950 5 H 0.124 0.876 6 N -0.391 5.391 7 C 0.408 3.592 8 N -0.440 5.440 9 O -0.436 6.436 10 C 0.302 3.698 11 O -0.377 6.377 12 N -0.360 5.360 13 C -0.020 4.020 14 C -0.123 4.123 15 H 0.107 0.893 16 C -0.199 4.199 17 C -0.110 4.110 18 H 0.100 0.900 19 C -0.152 4.152 20 C 0.024 3.976 21 N -0.378 5.378 22 C -0.369 4.369 23 H 0.087 0.913 24 C -0.211 4.211 25 N -0.584 5.584 26 Si 0.738 3.262 27 H -0.213 1.213 28 H -0.217 1.217 29 H -0.213 1.213 30 C -0.011 4.011 31 H 0.072 0.928 32 H 0.073 0.927 33 H 0.074 0.926 34 H 0.079 0.921 35 H 0.080 0.920 36 H 0.114 0.886 37 H 0.093 0.907 38 H 0.232 0.768 39 H 0.219 0.781 40 H 0.245 0.755 41 H 0.085 0.915 42 H 0.089 0.911 43 H 0.073 0.927 44 H 0.082 0.918 45 H 0.074 0.926 46 H 0.084 0.916 47 H 0.086 0.914 48 H 0.035 0.965 49 H 0.037 0.963 50 H 0.217 0.783 51 H 0.065 0.935 52 H 0.103 0.897 53 H 0.092 0.908 Dipole moment (debyes) X Y Z Total from point charges -9.291 -29.910 -8.988 32.584 hybrid contribution 0.945 0.279 -0.240 1.014 sum -8.346 -29.631 -9.228 32.138 Atomic orbital electron populations 1.21750 0.95584 1.01496 1.02109 1.21450 0.96133 0.96005 1.01748 1.22021 0.92141 0.98232 1.04972 1.20655 0.95883 0.92116 0.86368 0.87620 1.44699 1.57463 1.32689 1.04225 1.15840 0.80425 0.82377 0.80511 1.42969 1.58757 1.34480 1.07785 1.90981 1.41654 1.25180 1.85780 1.20490 0.78997 0.88620 0.81708 1.90786 1.46245 1.65322 1.35388 1.48837 1.64967 1.15908 1.06249 1.22248 0.98870 0.97789 0.83062 1.22168 0.97574 0.96260 0.96271 0.89329 1.21834 0.99264 0.98614 1.00206 1.22269 0.99012 0.95629 0.94096 0.89969 1.21717 1.00967 0.93287 0.99261 1.20675 0.95624 0.86740 0.94561 1.42359 1.54443 1.10084 1.30919 1.19206 1.18590 0.91880 1.07217 0.91278 1.24739 1.00559 0.98101 0.97750 1.69649 1.44120 1.25901 1.18762 0.86259 0.80146 0.82008 0.77744 1.21259 1.21696 1.21299 1.22523 0.98679 0.82831 0.97076 0.92794 0.92659 0.92597 0.92136 0.92050 0.88588 0.90736 0.76823 0.78067 0.75475 0.91485 0.91086 0.92710 0.91841 0.92641 0.91622 0.91438 0.96547 0.96316 0.78344 0.93525 0.89724 0.90805 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 -0.97 9.91 37.16 0.37 -0.60 16 2 C -0.12 -0.73 5.82 -26.73 -0.16 -0.89 16 3 C -0.14 -1.19 4.54 -26.73 -0.12 -1.32 16 4 C 0.16 1.44 2.47 -69.08 -0.17 1.27 16 5 H 0.11 0.61 6.99 -51.93 -0.36 0.25 16 6 N -0.73 -6.02 4.66 -59.81 -0.28 -6.30 16 7 C 0.71 8.03 7.59 -86.92 -0.66 7.37 16 8 N -0.87 -6.06 8.88 27.63 0.25 -5.82 16 9 O -0.56 -9.29 13.03 -18.20 -0.24 -9.53 16 10 C 0.52 7.04 6.88 -10.98 -0.08 6.96 16 11 O -0.50 -9.38 13.89 -17.93 -0.25 -9.63 16 12 N -0.62 -7.56 3.29 -169.99 -0.56 -8.12 16 13 C 0.10 0.88 6.05 -2.98 -0.02 0.87 16 14 C -0.10 -0.97 3.17 -89.24 -0.28 -1.25 16 15 H 0.09 0.82 7.85 -51.93 -0.41 0.41 16 16 C -0.14 -1.13 8.90 37.16 0.33 -0.80 16 17 C -0.09 -1.13 2.58 -88.93 -0.23 -1.36 16 18 H 0.08 1.07 7.86 -51.93 -0.41 0.66 16 19 C -0.11 -1.78 4.70 -26.73 -0.13 -1.91 16 20 C 0.15 3.13 6.15 -4.04 -0.02 3.10 16 21 N -0.73 -19.22 5.60 -59.91 -0.34 -19.56 16 22 C -0.24 -6.91 9.99 -15.06 -0.15 -7.06 16 23 H 0.07 1.96 7.83 -52.49 -0.41 1.55 16 24 C -0.02 -0.47 5.50 -17.43 -0.10 -0.57 16 25 N -0.94 -28.91 13.06 55.49 0.72 -28.18 16 26 Si 0.91 23.08 29.55 -169.99 -5.02 18.05 16 27 H -0.29 -7.18 7.11 56.52 0.40 -6.78 16 28 H -0.29 -7.40 7.11 56.52 0.40 -7.00 16 29 H -0.29 -7.14 7.11 56.52 0.40 -6.74 16 30 C 0.11 1.55 5.92 -2.32 -0.01 1.54 16 31 H 0.05 0.29 8.14 -51.93 -0.42 -0.13 16 32 H 0.05 0.41 8.14 -51.93 -0.42 -0.01 16 33 H 0.05 0.34 8.14 -51.93 -0.42 -0.08 16 34 H 0.06 0.29 8.14 -51.93 -0.42 -0.13 16 35 H 0.06 0.40 7.75 -51.93 -0.40 0.00 16 36 H 0.10 1.20 6.04 -51.93 -0.31 0.89 16 37 H 0.07 0.62 7.62 -51.93 -0.40 0.22 16 38 H 0.40 1.78 8.84 -40.82 -0.36 1.42 16 39 H 0.39 1.31 8.84 -40.82 -0.36 0.95 16 40 H 0.41 2.72 8.93 -40.82 -0.36 2.35 16 41 H 0.07 0.51 8.00 -51.93 -0.42 0.10 16 42 H 0.07 0.44 6.52 -51.93 -0.34 0.10 16 43 H 0.05 0.44 8.14 -51.93 -0.42 0.01 16 44 H 0.06 0.56 8.14 -51.93 -0.42 0.14 16 45 H 0.05 0.35 8.14 -51.93 -0.42 -0.07 16 46 H 0.07 1.04 7.99 -51.93 -0.41 0.62 16 47 H 0.07 1.05 8.14 -51.93 -0.42 0.62 16 48 H 0.02 0.35 8.14 -51.93 -0.42 -0.07 16 49 H 0.02 0.40 7.67 -51.93 -0.40 0.00 16 50 H 0.38 10.41 7.67 -40.82 -0.31 10.09 16 51 H 0.25 7.61 8.31 -40.82 -0.34 7.27 16 52 H 0.08 1.38 7.83 -51.93 -0.41 0.98 16 53 H 0.07 1.06 7.93 -51.93 -0.41 0.65 16 LS Contribution 417.21 15.07 6.29 6.29 Total: -1.00 -38.90 417.21 -10.28 -49.17 By element: Atomic # 1 Polarization: 17.70 SS G_CDS: -9.43 Total: 8.28 kcal Atomic # 6 Polarization: 6.78 SS G_CDS: -1.42 Total: 5.35 kcal Atomic # 7 Polarization: -67.78 SS G_CDS: -0.20 Total: -67.98 kcal Atomic # 8 Polarization: -18.68 SS G_CDS: -0.49 Total: -19.16 kcal Atomic # 14 Polarization: 23.08 SS G_CDS: -5.02 Total: 18.05 kcal Total LS contribution 6.29 Total: 6.29 kcal Total: -38.90 -10.28 -49.17 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. ZINC001104952359.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 -18.035 kcal (2) G-P(sol) polarization free energy of solvation -38.897 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -56.932 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.278 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -49.175 kcal (6) G-S(sol) free energy of system = (1) + (5) -67.210 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds