Wall clock time and date at job start Tue Mar 31 2020 06:46:32 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 1.52998 * 109.47013 * 2 1 4 4 C 1.53005 * 109.47254 * 180.02562 * 3 2 1 5 5 C 1.53000 * 110.53300 * 302.83038 * 4 3 2 6 6 N 1.47305 * 110.72909 * 65.74806 * 4 3 2 7 7 C 1.34533 * 106.61962 * 118.37100 * 6 4 3 8 8 O 1.21537 * 123.77604 * 180.20705 * 7 6 4 9 9 N 1.33789 * 112.45580 * 0.38407 * 7 6 4 10 10 C 1.46491 * 124.18191 * 179.86516 * 9 7 6 11 11 C 1.53003 * 109.47496 * 269.69759 * 10 9 7 12 12 H 1.09002 * 109.46782 * 59.99646 * 11 10 9 13 13 O 1.42896 * 109.47073 * 300.00198 * 11 10 9 14 14 C 1.52995 * 109.47620 * 179.97438 * 11 10 9 15 15 O 1.42899 * 109.47055 * 184.99709 * 14 11 10 16 16 C 1.35680 * 116.99791 * 179.97438 * 15 14 11 17 17 C 1.39307 * 119.81735 * 359.73563 * 16 15 14 18 18 C 1.36443 * 120.18498 * 179.75871 * 17 16 15 19 19 C 1.40827 * 119.80746 * 0.50427 * 18 17 16 20 20 C 1.41219 * 120.17498 * 179.72010 * 19 18 17 21 21 H 1.08003 * 119.99476 * 155.16935 * 20 19 18 22 22 C 1.39890 * 120.00486 * 335.16951 * 20 19 18 23 23 N 1.30882 * 119.99551 * 342.15984 * 22 20 19 24 24 Si 1.86798 * 119.99945 * 162.15629 * 22 20 19 25 25 H 1.48505 * 109.46917 * 94.66010 * 24 22 20 26 26 H 1.48499 * 109.46757 * 214.65756 * 24 22 20 27 27 H 1.48492 * 109.47195 * 334.65822 * 24 22 20 28 28 C 1.40836 * 119.64691 * 359.74975 * 19 18 17 29 29 C 1.36436 * 119.80625 * 359.97438 * 28 19 18 30 30 C 1.34768 * 111.64384 * 359.59401 * 9 7 6 31 31 O 1.21242 * 127.16164 * 180.19620 * 30 9 7 32 32 H 1.08999 * 109.47337 * 59.99575 * 1 2 3 33 33 H 1.09001 * 109.47475 * 180.02562 * 1 2 3 34 34 H 1.09004 * 109.47124 * 300.00014 * 1 2 3 35 35 H 1.08997 * 109.46979 * 240.00359 * 2 1 3 36 36 H 1.09000 * 109.47804 * 120.00175 * 2 1 3 37 37 H 1.08997 * 109.47377 * 60.00676 * 3 2 1 38 38 H 1.08999 * 109.47417 * 300.00376 * 3 2 1 39 39 H 1.09007 * 109.47109 * 297.87358 * 5 4 3 40 40 H 1.09003 * 109.47167 * 57.87046 * 5 4 3 41 41 H 1.08993 * 109.47301 * 177.87097 * 5 4 3 42 42 H 0.96999 * 126.69546 * 298.62066 * 6 4 3 43 43 H 1.09000 * 109.47652 * 149.69310 * 10 9 7 44 44 H 1.09006 * 109.47373 * 29.69490 * 10 9 7 45 45 H 0.96709 * 113.99970 * 299.99396 * 13 11 10 46 46 H 1.09007 * 109.46878 * 64.99979 * 14 11 10 47 47 H 1.09001 * 109.47159 * 305.00635 * 14 11 10 48 48 H 1.08005 * 119.91048 * 0.02562 * 17 16 15 49 49 H 1.08007 * 120.09573 * 180.25170 * 18 17 16 50 50 H 0.97002 * 119.99495 * 179.97438 * 23 22 20 51 51 H 1.07998 * 120.09519 * 179.97438 * 28 19 18 52 52 H 1.08004 * 119.90466 * 180.02562 * 29 28 19 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 2.0399 1.4425 0.0000 4 6 3.5700 1.4426 -0.0006 5 6 4.1072 0.6656 1.2030 6 7 4.0909 0.8769 -1.2571 7 6 4.7997 1.8524 -1.8536 8 8 5.3666 1.7200 -2.9204 9 7 4.8139 2.9836 -1.1392 10 6 5.5106 4.2059 -1.5473 11 6 6.9383 4.1871 -0.9974 12 1 7.4675 3.3189 -1.3902 13 8 6.8983 4.1153 0.4292 14 6 7.6661 5.4634 -1.4241 15 8 9.0322 5.3937 -1.0106 16 6 9.8225 6.4539 -1.3141 17 6 9.2893 7.5402 -2.0042 18 6 10.0761 8.6125 -2.3090 19 6 11.4333 8.6143 -1.9332 20 6 12.2561 9.7174 -2.2500 21 1 13.1346 9.9237 -1.6566 22 6 11.9333 10.5430 -3.3322 23 7 11.1018 10.1220 -4.2511 24 14 12.6889 12.2461 -3.4656 25 1 13.9009 12.1843 -4.3215 26 1 11.7035 13.1788 -4.0693 27 1 13.0628 12.7292 -2.1121 28 6 11.9658 7.5097 -1.2405 29 6 11.1640 6.4479 -0.9385 30 6 4.1033 2.8615 -0.0007 31 8 3.9276 3.7098 0.8476 32 1 -0.3634 0.5139 -0.8899 33 1 -0.3634 -1.0277 0.0005 34 1 -0.3633 0.5139 0.8900 35 1 1.8933 -0.5138 -0.8900 36 1 1.8934 -0.5138 0.8899 37 1 1.6767 1.9563 0.8900 38 1 1.6766 1.9564 -0.8899 39 1 3.7850 1.1530 2.1233 40 1 3.7228 -0.3541 1.1781 41 1 5.1962 0.6444 1.1651 42 1 3.9475 -0.0224 -1.5912 43 1 4.9814 5.0742 -1.1546 44 1 5.5411 4.2607 -2.6356 45 1 6.4412 4.8576 0.8477 46 1 7.1893 6.3263 -0.9590 47 1 7.6192 5.5632 -2.5086 48 1 8.2492 7.5356 -2.2951 49 1 9.6602 9.4557 -2.8406 50 1 10.8777 10.6946 -5.0013 51 1 13.0057 7.5033 -0.9492 52 1 11.5706 5.6002 -0.4069 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 ZINC000051373761.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 06:46:32 Heat of formation + Delta-G solvation = -121.250042 kcal Electronic energy + Delta-G solvation = -34237.222242 eV Core-core repulsion = 29588.490671 eV Total energy + Delta-G solvation = -4648.731571 eV No. of doubly occupied orbitals = 71 Molecular weight (most abundant/longest-lived isotopes) = 376.188 amu Computer time = 1.57 seconds Orbital eigenvalues (eV) -42.93365 -39.09530 -38.92291 -37.96998 -37.15381 -36.12999 -35.59605 -34.07327 -33.33677 -31.22153 -30.80404 -29.63226 -29.10391 -27.51960 -26.89716 -24.88008 -24.49874 -23.18211 -22.41037 -21.07871 -20.93878 -20.71687 -20.34007 -18.36291 -17.41232 -17.30977 -17.05080 -16.80284 -16.45876 -16.13084 -16.06136 -15.68833 -15.40753 -15.20176 -14.79644 -14.54735 -14.48326 -14.16838 -14.03891 -13.93081 -13.69576 -13.41102 -13.07361 -12.79915 -12.76029 -12.43784 -12.40191 -12.35124 -12.06779 -11.95939 -11.81095 -11.77076 -11.47925 -11.30639 -11.22584 -11.13111 -11.08301 -10.98349 -10.61759 -10.51126 -10.34483 -9.95457 -9.91045 -9.80492 -9.67873 -9.36637 -9.01068 -7.65219 -7.00877 -6.72723 -4.24814 1.31679 1.81334 2.66805 2.72160 2.77005 2.96941 3.08416 3.12698 3.21869 3.47373 3.83264 3.92158 3.95617 4.12187 4.26981 4.43699 4.50119 4.58855 4.61926 4.79484 4.81444 4.90555 5.00059 5.03083 5.08761 5.13275 5.18426 5.20749 5.24176 5.33653 5.41485 5.45701 5.53786 5.61585 5.63640 5.67509 5.70472 5.93067 6.10165 6.28649 6.39225 6.70658 6.71351 6.89387 7.06209 7.07138 7.28189 7.40504 7.55827 7.57810 7.79559 7.90399 8.00522 8.15590 8.44152 8.65014 8.90561 8.99404 10.22237 Molecular weight = 376.19amu Principal moments of inertia in cm(-1) A = 0.024048 B = 0.001521 C = 0.001503 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1164.038919 B =18405.070159 C =18625.923526 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.153 4.153 2 C -0.124 4.124 3 C -0.114 4.114 4 C 0.122 3.878 5 C -0.149 4.149 6 N -0.720 5.720 7 C 0.703 3.297 8 O -0.539 6.539 9 N -0.567 5.567 10 C 0.088 3.912 11 C 0.096 3.904 12 H 0.113 0.887 13 O -0.546 6.546 14 C 0.043 3.957 15 O -0.317 6.317 16 C -0.011 4.011 17 C -0.174 4.174 18 C -0.134 4.134 19 C 0.087 3.913 20 C -0.463 4.463 21 H 0.077 0.923 22 C 0.075 3.925 23 N -0.800 5.800 24 Si 0.906 3.094 25 H -0.271 1.271 26 H -0.276 1.276 27 H -0.261 1.261 28 C -0.196 4.196 29 C -0.111 4.111 30 C 0.536 3.464 31 O -0.459 6.459 32 H 0.055 0.945 33 H 0.057 0.943 34 H 0.057 0.943 35 H 0.063 0.937 36 H 0.072 0.928 37 H 0.090 0.910 38 H 0.074 0.926 39 H 0.084 0.916 40 H 0.081 0.919 41 H 0.071 0.929 42 H 0.438 0.562 43 H 0.102 0.898 44 H 0.111 0.889 45 H 0.376 0.624 46 H 0.057 0.943 47 H 0.063 0.937 48 H 0.093 0.907 49 H 0.121 0.879 50 H 0.279 0.721 51 H 0.100 0.900 52 H 0.097 0.903 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -22.186 -18.132 7.086 29.516 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 -0.210 4.210 2 C -0.161 4.161 3 C -0.153 4.153 4 C 0.031 3.969 5 C -0.207 4.207 6 N -0.385 5.385 7 C 0.403 3.597 8 O -0.412 6.412 9 N -0.313 5.313 10 C -0.034 4.034 11 C 0.035 3.965 12 H 0.130 0.870 13 O -0.351 6.351 14 C -0.035 4.035 15 O -0.232 6.232 16 C -0.054 4.054 17 C -0.193 4.193 18 C -0.153 4.153 19 C 0.085 3.915 20 C -0.493 4.493 21 H 0.095 0.905 22 C -0.142 4.142 23 N -0.426 5.426 24 Si 0.731 3.269 25 H -0.196 1.196 26 H -0.201 1.201 27 H -0.185 1.185 28 C -0.215 4.215 29 C -0.130 4.130 30 C 0.322 3.678 31 O -0.328 6.328 32 H 0.074 0.926 33 H 0.076 0.924 34 H 0.076 0.924 35 H 0.082 0.918 36 H 0.091 0.909 37 H 0.109 0.891 38 H 0.093 0.907 39 H 0.103 0.897 40 H 0.099 0.901 41 H 0.090 0.910 42 H 0.282 0.718 43 H 0.120 0.880 44 H 0.129 0.871 45 H 0.223 0.777 46 H 0.075 0.925 47 H 0.081 0.919 48 H 0.111 0.889 49 H 0.138 0.862 50 H 0.090 0.910 51 H 0.118 0.882 52 H 0.115 0.885 Dipole moment (debyes) X Y Z Total from point charges -21.638 -18.267 6.721 29.104 hybrid contribution -0.152 1.133 -0.613 1.297 sum -21.789 -17.134 6.108 28.384 Atomic orbital electron populations 1.21758 0.95097 1.02021 1.02169 1.21568 0.96560 0.95423 1.02588 1.21854 0.90023 0.99099 1.04313 1.21499 0.96654 0.91440 0.87303 1.22053 1.02468 1.00639 0.95564 1.45653 1.55158 1.15128 1.22554 1.15884 0.79696 0.80601 0.83500 1.91049 1.48195 1.81504 1.20443 1.46158 1.48770 1.14144 1.22231 1.22344 0.93322 0.84663 1.03073 1.22268 0.92628 0.99464 0.82128 0.86969 1.86618 1.80597 1.50299 1.17603 1.22971 0.83958 0.96734 0.99831 1.85860 1.18737 1.41157 1.77472 1.18589 0.91132 0.88813 1.06852 1.20593 0.98640 0.95986 1.04073 1.20926 0.93541 0.97858 1.03001 1.17602 0.91869 0.91574 0.90451 1.19468 1.09612 1.08752 1.11474 0.90494 1.25873 0.94216 0.99612 0.94451 1.69845 1.28695 1.36211 1.07894 0.86337 0.79384 0.81725 0.79492 1.19640 1.20140 1.18476 1.20605 0.97925 0.94458 1.08553 1.19612 0.90881 0.99005 1.03474 1.20685 0.77072 0.89441 0.80584 1.90783 1.57061 1.46572 1.38341 0.92608 0.92383 0.92395 0.91782 0.90924 0.89122 0.90734 0.89697 0.90051 0.90987 0.71752 0.87960 0.87080 0.77653 0.92498 0.91855 0.88858 0.86160 0.91021 0.88182 0.88498 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. 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 -0.49 9.91 37.16 0.37 -0.12 16 2 C -0.12 -0.38 5.43 -26.73 -0.15 -0.53 16 3 C -0.11 -0.54 4.58 -26.73 -0.12 -0.66 16 4 C 0.12 0.78 1.01 -132.09 -0.13 0.65 16 5 C -0.15 -0.78 8.61 37.16 0.32 -0.46 16 6 N -0.72 -4.99 5.62 -52.94 -0.30 -5.29 16 7 C 0.70 7.67 8.62 -88.02 -0.76 6.91 16 8 O -0.54 -7.80 17.48 5.33 0.09 -7.70 16 9 N -0.57 -5.96 2.53 -120.73 -0.31 -6.27 16 10 C 0.09 0.93 5.39 -4.04 -0.02 0.90 16 11 C 0.10 1.27 3.52 -26.73 -0.09 1.17 16 12 H 0.11 1.67 8.14 -51.93 -0.42 1.25 16 13 O -0.55 -7.64 12.69 -40.07 -0.51 -8.15 16 14 C 0.04 0.66 4.37 37.16 0.16 0.83 16 15 O -0.32 -6.57 10.09 -23.58 -0.24 -6.81 16 16 C -0.01 -0.25 6.71 -38.79 -0.26 -0.51 16 17 C -0.17 -4.09 8.96 -39.83 -0.36 -4.45 16 18 C -0.13 -3.49 8.64 -39.25 -0.34 -3.82 16 19 C 0.09 2.35 5.57 -106.80 -0.60 1.76 16 20 C -0.46 -12.37 9.04 -37.83 -0.34 -12.71 16 21 H 0.08 1.97 7.91 -52.48 -0.41 1.56 16 22 C 0.08 1.90 5.13 -17.34 -0.09 1.81 16 23 N -0.80 -20.81 10.97 55.54 0.61 -20.20 16 24 Si 0.91 18.76 29.60 -169.99 -5.03 13.73 16 25 H -0.27 -5.54 7.11 56.52 0.40 -5.14 16 26 H -0.28 -5.59 7.11 56.52 0.40 -5.19 16 27 H -0.26 -5.36 7.11 56.52 0.40 -4.96 16 28 C -0.20 -4.90 9.74 -39.25 -0.38 -5.28 16 29 C -0.11 -2.64 9.92 -39.83 -0.40 -3.04 16 30 C 0.54 5.22 6.52 -10.55 -0.07 5.15 16 31 O -0.46 -5.35 17.70 5.59 0.10 -5.25 16 32 H 0.05 0.20 8.14 -51.93 -0.42 -0.23 16 33 H 0.06 0.17 8.14 -51.93 -0.42 -0.26 16 34 H 0.06 0.18 8.14 -51.93 -0.42 -0.24 16 35 H 0.06 0.17 7.41 -51.93 -0.38 -0.21 16 36 H 0.07 0.17 6.42 -51.93 -0.33 -0.16 16 37 H 0.09 0.42 8.14 -51.93 -0.42 0.00 16 38 H 0.07 0.39 8.14 -51.93 -0.42 -0.03 16 39 H 0.08 0.44 8.14 -51.92 -0.42 0.01 16 40 H 0.08 0.25 6.37 -51.93 -0.33 -0.08 16 41 H 0.07 0.49 8.14 -51.93 -0.42 0.07 16 42 H 0.44 2.03 8.41 -40.82 -0.34 1.69 16 43 H 0.10 0.92 8.00 -51.93 -0.42 0.50 16 44 H 0.11 1.12 7.85 -51.93 -0.41 0.71 16 45 H 0.38 4.37 9.05 45.56 0.41 4.78 16 46 H 0.06 0.83 7.66 -51.92 -0.40 0.43 16 47 H 0.06 0.96 7.63 -51.93 -0.40 0.57 16 48 H 0.09 1.92 6.27 -52.48 -0.33 1.59 16 49 H 0.12 3.21 6.18 -52.48 -0.32 2.88 16 50 H 0.28 6.60 8.30 -40.82 -0.34 6.26 16 51 H 0.10 2.33 8.06 -52.49 -0.42 1.90 16 52 H 0.10 2.11 8.06 -52.48 -0.42 1.68 16 LS Contribution 428.38 15.07 6.46 6.46 Total: -1.00 -33.09 428.38 -9.41 -42.50 By element: Atomic # 1 Polarization: 16.42 SS G_CDS: -7.03 Total: 9.39 kcal Atomic # 6 Polarization: -9.15 SS G_CDS: -3.25 Total: -12.40 kcal Atomic # 7 Polarization: -31.77 SS G_CDS: 0.01 Total: -31.76 kcal Atomic # 8 Polarization: -27.36 SS G_CDS: -0.55 Total: -27.91 kcal Atomic # 14 Polarization: 18.76 SS G_CDS: -5.03 Total: 13.73 kcal Total LS contribution 6.46 Total: 6.46 kcal Total: -33.09 -9.41 -42.50 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. ZINC000051373761.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 -78.754 kcal (2) G-P(sol) polarization free energy of solvation -33.091 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -111.845 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.405 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.496 kcal (6) G-S(sol) free energy of system = (1) + (5) -121.250 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.58 seconds