Wall clock time and date at job start Sat Apr 11 2020 06:11:49 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 1.53006 * 1 3 3 C 1.52998 * 109.46778 * 2 1 4 4 C 1.53006 * 109.46778 * 180.02562 * 3 2 1 5 5 C 1.53006 * 109.46992 * 180.02562 * 4 3 2 6 6 H 1.08994 * 109.46873 * 55.00012 * 5 4 3 7 7 N 1.46500 * 109.46891 * 294.99590 * 5 4 3 8 8 C 1.34773 * 120.00431 * 300.00479 * 7 5 4 9 9 N 1.34777 * 120.00097 * 179.72742 * 8 7 5 10 10 O 1.21593 * 119.99894 * 359.97438 * 8 7 5 11 11 C 1.50698 * 109.46867 * 175.00106 * 5 4 3 12 12 O 1.21285 * 120.00368 * 99.99688 * 11 5 4 13 13 N 1.34779 * 119.99750 * 279.99715 * 11 5 4 14 14 C 1.47018 * 125.65203 * 0.02822 * 13 11 5 15 15 C 1.54316 * 107.27482 * 181.02131 * 14 13 11 16 16 H 1.09002 * 110.72195 * 140.73164 * 15 14 13 17 17 N 1.46498 * 110.72179 * 263.83036 * 15 14 13 18 18 C 1.36939 * 119.99769 * 273.54513 * 17 15 14 19 19 H 1.07998 * 120.00215 * 359.97438 * 18 17 15 20 20 C 1.38818 * 119.99875 * 179.97438 * 18 17 15 21 21 N 1.31616 * 119.99862 * 359.97438 * 20 18 17 22 22 Si 1.86802 * 119.99892 * 179.97438 * 20 18 17 23 23 H 1.48499 * 109.46886 * 0.02562 * 22 20 18 24 24 H 1.48495 * 109.46840 * 119.99857 * 22 20 18 25 25 H 1.48498 * 109.47059 * 240.00327 * 22 20 18 26 26 C 1.55155 * 102.94279 * 22.19209 * 15 14 13 27 27 C 1.53000 * 111.00396 * 82.57147 * 26 15 14 28 28 C 1.53001 * 111.00821 * 206.38779 * 26 15 14 29 29 C 1.47422 * 125.64764 * 179.71692 * 13 11 5 30 30 H 1.08992 * 109.47167 * 60.00013 * 1 2 3 31 31 H 1.08995 * 109.47180 * 180.02562 * 1 2 3 32 32 H 1.09003 * 109.46815 * 299.99923 * 1 2 3 33 33 H 1.08995 * 109.46943 * 239.99781 * 2 1 3 34 34 H 1.09000 * 109.46992 * 119.99727 * 2 1 3 35 35 H 1.09003 * 109.47385 * 60.00426 * 3 2 1 36 36 H 1.09000 * 109.47136 * 299.99638 * 3 2 1 37 37 H 1.08995 * 109.46943 * 59.99781 * 4 3 2 38 38 H 1.09000 * 109.46992 * 299.99727 * 4 3 2 39 39 H 0.97000 * 119.99456 * 120.00041 * 7 5 4 40 40 H 0.96999 * 120.00043 * 180.27820 * 9 8 7 41 41 H 0.97000 * 119.99736 * 0.26819 * 9 8 7 42 42 H 1.09006 * 109.88068 * 300.43861 * 14 13 11 43 43 H 1.09002 * 109.88311 * 61.59881 * 14 13 11 44 44 H 0.97002 * 120.00281 * 93.54856 * 17 15 14 45 45 H 0.97001 * 120.00002 * 179.97438 * 21 20 18 46 46 H 1.08997 * 109.47570 * 60.00593 * 27 26 15 47 47 H 1.08999 * 109.47371 * 180.02562 * 27 26 15 48 48 H 1.09004 * 109.47412 * 299.99638 * 27 26 15 49 49 H 1.08991 * 109.47129 * 59.99752 * 28 26 15 50 50 H 1.08997 * 109.47381 * 180.02562 * 28 26 15 51 51 H 1.09005 * 109.46647 * 299.99794 * 28 26 15 52 52 H 1.09003 * 110.37046 * 274.75305 * 29 13 11 53 53 H 1.09003 * 110.36671 * 37.07067 * 29 13 11 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 1.5301 0.0000 0.0000 3 6 2.0400 1.4425 0.0000 4 6 3.5700 1.4425 -0.0006 5 6 4.0800 2.8851 0.0000 6 1 3.6457 3.4235 0.8423 7 7 3.6920 3.5407 -1.2513 8 6 4.1159 3.0460 -2.4311 9 7 3.7544 3.6460 -3.5825 10 8 4.8210 2.0556 -2.4569 11 6 5.5820 2.8868 0.1232 12 8 6.2712 3.0403 -0.8629 13 7 6.1593 2.7177 1.3292 14 6 5.4471 2.5215 2.6003 15 6 6.5135 2.3999 3.7091 16 1 6.1912 2.9175 4.6126 17 7 6.8049 0.9931 3.9960 18 6 6.0388 0.3056 4.8991 19 1 5.2200 0.8005 5.4001 20 6 6.3145 -1.0275 5.1705 21 7 7.3120 -1.6308 4.5595 22 14 5.2699 -1.9652 6.4030 23 1 4.2195 -1.0670 6.9463 24 1 4.6300 -3.1236 5.7294 25 1 6.1293 -2.4504 7.5125 26 6 7.7483 3.0994 3.0819 27 6 7.6631 4.6176 3.2509 28 6 9.0482 2.5562 3.6786 29 6 7.6098 2.6924 1.5914 30 1 -0.3633 0.5138 -0.8899 31 1 -0.3633 -1.0276 0.0005 32 1 -0.3633 0.5138 0.8900 33 1 1.8933 -0.5138 -0.8899 34 1 1.8934 -0.5138 0.8900 35 1 1.6767 1.9564 0.8900 36 1 1.6767 1.9563 -0.8900 37 1 3.9329 0.9288 -0.8908 38 1 3.9337 0.9286 0.8891 39 1 3.1298 4.3309 -1.2307 40 1 4.0562 3.2875 -4.4318 41 1 3.1922 4.4362 -3.5618 42 1 4.8014 3.3769 2.7993 43 1 4.8532 1.6086 2.5554 44 1 7.5405 0.5487 3.5463 45 1 7.5050 -2.5623 4.7494 46 1 7.6238 4.8636 4.3120 47 1 8.5406 5.0830 2.8021 48 1 6.7640 4.9882 2.7584 49 1 9.1173 1.4858 3.4853 50 1 9.8977 3.0639 3.2218 51 1 9.0557 2.7324 4.7543 52 1 8.0070 1.6900 1.4310 53 1 8.1234 3.4113 0.9530 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 ZINC001677043028.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 06:11:49 Heat of formation + Delta-G solvation = -63.299354 kcal Electronic energy + Delta-G solvation = -32254.592632 eV Core-core repulsion = 28161.178258 eV Total energy + Delta-G solvation = -4093.414374 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) -40.54427 -39.36897 -37.61244 -36.08851 -34.11884 -33.87323 -33.45393 -33.08902 -30.73715 -30.40591 -27.89041 -27.47318 -26.66171 -25.33088 -23.80078 -22.74853 -21.76901 -21.26379 -20.52911 -18.92960 -18.65208 -18.48983 -17.19836 -17.13907 -16.32092 -15.83361 -15.53331 -15.11281 -14.80902 -14.53826 -14.23846 -14.15204 -13.98958 -13.84214 -13.63830 -13.52366 -12.98585 -12.82441 -12.70216 -12.48602 -12.43941 -12.04255 -11.80418 -11.73498 -11.54880 -11.43838 -11.15719 -11.03976 -10.97920 -10.91714 -10.83806 -10.56003 -10.54192 -10.37689 -10.19974 -9.99837 -9.79792 -9.67152 -9.59380 -9.49885 -9.00950 -8.69317 -8.07878 -7.04050 -5.82188 -3.12087 2.78836 3.08066 3.36781 3.39946 3.45328 3.48232 3.64386 4.48313 4.52971 4.65821 4.84726 4.94543 5.01430 5.06879 5.13709 5.21773 5.28510 5.36011 5.45249 5.48390 5.64665 5.72059 5.73943 5.76996 5.79252 5.89056 5.93253 5.96007 6.01442 6.08823 6.14430 6.22626 6.23547 6.26580 6.29543 6.32294 6.38575 6.43186 6.48806 6.53313 6.63269 6.71427 6.77312 6.82861 6.95288 6.96637 7.65213 8.01949 8.03331 8.35443 8.62018 8.86139 9.47535 10.03009 10.37637 11.39916 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.008963 B = 0.004272 C = 0.003160 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 3123.096773 B = 6552.829124 C = 8857.333931 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.149 4.149 2 C -0.127 4.127 3 C -0.108 4.108 4 C -0.137 4.137 5 C 0.161 3.839 6 H 0.105 0.895 7 N -0.733 5.733 8 C 0.709 3.291 9 N -0.874 5.874 10 O -0.559 6.559 11 C 0.513 3.487 12 O -0.522 6.522 13 N -0.607 5.607 14 C 0.069 3.931 15 C 0.180 3.820 16 H 0.069 0.931 17 N -0.712 5.712 18 C -0.245 4.245 19 H 0.072 0.928 20 C -0.007 4.007 21 N -0.927 5.927 22 Si 0.904 3.096 23 H -0.280 1.280 24 H -0.292 1.292 25 H -0.292 1.292 26 C -0.089 4.089 27 C -0.128 4.128 28 C -0.125 4.125 29 C 0.124 3.876 30 H 0.049 0.951 31 H 0.052 0.948 32 H 0.053 0.947 33 H 0.060 0.940 34 H 0.066 0.934 35 H 0.060 0.940 36 H 0.057 0.943 37 H 0.093 0.907 38 H 0.082 0.918 39 H 0.396 0.604 40 H 0.412 0.588 41 H 0.391 0.609 42 H 0.051 0.949 43 H 0.078 0.922 44 H 0.387 0.613 45 H 0.256 0.744 46 H 0.057 0.943 47 H 0.052 0.948 48 H 0.051 0.949 49 H 0.069 0.931 50 H 0.044 0.956 51 H 0.059 0.941 52 H 0.067 0.933 53 H 0.066 0.934 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -10.330 14.293 -9.575 20.067 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 -0.207 4.207 2 C -0.165 4.165 3 C -0.146 4.146 4 C -0.175 4.175 5 C 0.052 3.948 6 H 0.122 0.878 7 N -0.389 5.389 8 C 0.408 3.592 9 N -0.442 5.442 10 O -0.433 6.433 11 C 0.299 3.701 12 O -0.397 6.397 13 N -0.341 5.341 14 C -0.057 4.057 15 C 0.068 3.932 16 H 0.086 0.914 17 N -0.353 5.353 18 C -0.376 4.376 19 H 0.090 0.910 20 C -0.204 4.204 21 N -0.575 5.575 22 Si 0.736 3.264 23 H -0.205 1.205 24 H -0.219 1.219 25 H -0.219 1.219 26 C -0.091 4.091 27 C -0.185 4.185 28 C -0.183 4.183 29 C 0.001 3.999 30 H 0.068 0.932 31 H 0.071 0.929 32 H 0.072 0.928 33 H 0.079 0.921 34 H 0.085 0.915 35 H 0.078 0.922 36 H 0.076 0.924 37 H 0.111 0.889 38 H 0.101 0.899 39 H 0.229 0.771 40 H 0.243 0.757 41 H 0.218 0.782 42 H 0.069 0.931 43 H 0.096 0.904 44 H 0.223 0.777 45 H 0.066 0.934 46 H 0.076 0.924 47 H 0.071 0.929 48 H 0.070 0.930 49 H 0.088 0.912 50 H 0.063 0.937 51 H 0.079 0.921 52 H 0.085 0.915 53 H 0.084 0.916 Dipole moment (debyes) X Y Z Total from point charges -9.491 13.409 -9.889 19.175 hybrid contribution -0.832 -0.135 0.225 0.872 sum -10.323 13.274 -9.664 19.395 Atomic orbital electron populations 1.21754 0.96136 1.01423 1.01371 1.21526 0.95451 0.96947 1.02547 1.21508 0.94658 0.96962 1.01427 1.22017 0.95790 0.94346 1.05377 1.20644 0.92207 0.96136 0.85860 0.87761 1.44709 1.56567 1.33284 1.04382 1.15847 0.79680 0.83229 0.80493 1.42979 1.59014 1.34505 1.07749 1.90992 1.39836 1.26789 1.85731 1.20441 0.90327 0.77388 0.81944 1.90720 1.64440 1.48787 1.35713 1.48380 1.07723 1.71209 1.06811 1.23299 0.97529 1.00240 0.84618 1.21199 0.90619 0.87595 0.93836 0.91365 1.42466 1.37736 1.05452 1.49651 1.19244 1.09630 0.92938 1.15815 0.91005 1.24732 0.98509 0.96974 1.00167 1.69665 1.30819 1.11619 1.45372 0.86167 0.79496 0.79996 0.80782 1.20515 1.21888 1.21889 1.22037 0.97330 0.95326 0.94366 1.21660 1.01267 0.94138 1.01468 1.21573 0.94224 1.01833 1.00657 1.22245 0.81346 1.01147 0.95129 0.93177 0.92925 0.92807 0.92117 0.91476 0.92156 0.92388 0.88870 0.89941 0.77118 0.75691 0.78247 0.93066 0.90408 0.77720 0.93442 0.92376 0.92931 0.92965 0.91205 0.93703 0.92145 0.91481 0.91555 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 14. 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 -1.46 9.91 37.16 0.37 -1.09 16 2 C -0.13 -1.49 5.93 -26.73 -0.16 -1.65 16 3 C -0.11 -1.22 5.10 -26.73 -0.14 -1.36 16 4 C -0.14 -1.97 4.53 -26.72 -0.12 -2.09 16 5 C 0.16 2.17 2.43 -69.08 -0.17 2.00 16 6 H 0.10 1.12 7.46 -51.93 -0.39 0.73 16 7 N -0.73 -8.37 4.66 -59.81 -0.28 -8.65 16 8 C 0.71 9.97 7.59 -86.92 -0.66 9.31 16 9 N -0.87 -7.93 8.88 27.63 0.25 -7.68 16 10 O -0.56 -10.96 13.03 -18.21 -0.24 -11.19 16 11 C 0.51 9.08 6.84 -10.99 -0.08 9.01 16 12 O -0.52 -11.17 13.93 -17.94 -0.25 -11.42 16 13 N -0.61 -10.38 3.31 -170.38 -0.56 -10.94 16 14 C 0.07 1.14 5.61 -3.07 -0.02 1.12 16 15 C 0.18 3.24 2.86 -66.10 -0.19 3.05 16 16 H 0.07 1.21 8.03 -51.93 -0.42 0.79 16 17 N -0.71 -16.36 4.61 -51.66 -0.24 -16.60 16 18 C -0.25 -6.31 9.98 -15.06 -0.15 -6.46 16 19 H 0.07 1.78 7.83 -52.49 -0.41 1.37 16 20 C -0.01 -0.19 5.50 -17.43 -0.10 -0.29 16 21 N -0.93 -27.02 13.06 55.49 0.72 -26.30 16 22 Si 0.90 21.54 29.55 -169.99 -5.02 16.51 16 23 H -0.28 -6.40 7.11 56.52 0.40 -6.00 16 24 H -0.29 -7.08 7.11 56.52 0.40 -6.68 16 25 H -0.29 -7.05 7.11 56.52 0.40 -6.65 16 26 C -0.09 -1.40 0.83 -152.24 -0.13 -1.53 16 27 C -0.13 -1.66 8.59 37.16 0.32 -1.34 16 28 C -0.13 -2.01 8.22 37.16 0.31 -1.71 16 29 C 0.12 2.16 5.82 -2.41 -0.01 2.15 16 30 H 0.05 0.45 8.14 -51.93 -0.42 0.02 16 31 H 0.05 0.49 8.14 -51.93 -0.42 0.07 16 32 H 0.05 0.50 8.14 -51.93 -0.42 0.07 16 33 H 0.06 0.76 8.14 -51.93 -0.42 0.33 16 34 H 0.07 0.86 8.14 -51.93 -0.42 0.44 16 35 H 0.06 0.61 8.14 -51.93 -0.42 0.19 16 36 H 0.06 0.62 7.75 -51.93 -0.40 0.21 16 37 H 0.09 1.64 6.04 -51.93 -0.31 1.33 16 38 H 0.08 1.32 6.65 -51.93 -0.35 0.98 16 39 H 0.40 2.93 8.84 -40.82 -0.36 2.57 16 40 H 0.41 3.48 8.93 -40.82 -0.36 3.11 16 41 H 0.39 2.08 8.84 -40.82 -0.36 1.72 16 42 H 0.05 0.69 7.85 -51.93 -0.41 0.29 16 43 H 0.08 1.43 6.66 -51.93 -0.35 1.09 16 44 H 0.39 9.70 6.10 -40.82 -0.25 9.46 16 45 H 0.26 7.28 8.31 -40.82 -0.34 6.94 16 46 H 0.06 0.70 8.14 -51.93 -0.42 0.28 16 47 H 0.05 0.63 8.14 -51.93 -0.42 0.21 16 48 H 0.05 0.67 7.91 -51.93 -0.41 0.25 16 49 H 0.07 1.31 6.38 -51.93 -0.33 0.97 16 50 H 0.04 0.62 8.14 -51.93 -0.42 0.20 16 51 H 0.06 0.98 8.14 -51.93 -0.42 0.56 16 52 H 0.07 1.31 7.99 -51.93 -0.41 0.90 16 53 H 0.07 1.14 7.95 -51.93 -0.41 0.73 16 LS Contribution 413.05 15.07 6.22 6.22 Total: -1.00 -34.84 413.05 -9.61 -44.46 By element: Atomic # 1 Polarization: 25.78 SS G_CDS: -9.30 Total: 16.48 kcal Atomic # 6 Polarization: 10.03 SS G_CDS: -0.92 Total: 9.11 kcal Atomic # 7 Polarization: -70.06 SS G_CDS: -0.11 Total: -70.17 kcal Atomic # 8 Polarization: -22.13 SS G_CDS: -0.49 Total: -22.62 kcal Atomic # 14 Polarization: 21.54 SS G_CDS: -5.02 Total: 16.51 kcal Total LS contribution 6.22 Total: 6.22 kcal Total: -34.84 -9.61 -44.46 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. ZINC001677043028.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 -18.842 kcal (2) G-P(sol) polarization free energy of solvation -34.843 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -53.685 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.615 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.458 kcal (6) G-S(sol) free energy of system = (1) + (5) -63.299 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds