Wall clock time and date at job start Mon Mar 8 2021 06:50:58 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= 0 * 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 N 1.46504 * 1 3 3 C 1.34771 * 119.99680 * 2 1 4 4 O 1.21566 * 120.00016 * 175.46279 * 3 2 1 5 5 C 1.47724 * 120.00161 * 355.46928 * 3 2 1 6 6 C 1.39714 * 120.02244 * 221.34655 * 5 3 2 7 7 C 1.37660 * 119.97212 * 179.71500 * 6 5 3 8 8 C 1.39502 * 120.02635 * 0.56014 * 7 6 5 9 9 C 1.48277 * 119.97970 * 179.74169 * 8 7 6 10 10 C 1.39400 * 120.13018 * 179.69984 * 9 8 7 11 11 C 1.38006 * 119.87259 * 179.76387 * 10 9 8 12 12 C 1.38333 * 120.12318 * 0.51320 * 11 10 9 13 13 C 1.50700 * 119.86870 * 179.76196 * 12 11 10 14 14 O 1.42903 * 109.47224 * 244.97561 * 13 12 11 15 15 Si 1.86302 * 109.47418 * 4.97780 * 13 12 11 16 16 C 1.38337 * 120.25890 * 359.73966 * 12 11 10 17 17 C 1.37994 * 120.12626 * 0.02562 * 16 12 11 18 18 C 1.39511 * 120.04765 * 359.71852 * 8 7 6 19 19 C 1.37658 * 120.02281 * 359.97438 * 18 8 7 20 20 C 1.46498 * 120.00137 * 180.02562 * 2 1 3 21 21 H 1.08998 * 109.47250 * 180.02562 * 20 2 1 22 22 C 1.53002 * 109.46818 * 300.00270 * 20 2 1 23 23 C 1.53012 * 109.46875 * 180.02562 * 22 20 2 24 24 C 1.52999 * 109.46674 * 299.99716 * 23 22 20 25 25 H 1.08998 * 109.47417 * 300.00294 * 24 23 22 26 26 O 1.42902 * 109.47025 * 179.97438 * 24 23 22 27 27 C 1.53002 * 109.47461 * 60.00188 * 24 23 22 28 28 C 1.52999 * 109.47068 * 299.99813 * 27 24 23 29 29 H 1.08997 * 109.47399 * 275.16569 * 1 2 3 30 30 H 1.08999 * 109.47244 * 35.16984 * 1 2 3 31 31 H 1.09011 * 109.46939 * 155.16934 * 1 2 3 32 32 H 1.07994 * 120.00912 * 359.97438 * 6 5 3 33 33 H 1.07998 * 119.98928 * 180.29485 * 7 6 5 34 34 H 1.08004 * 120.06219 * 0.02562 * 10 9 8 35 35 H 1.07992 * 119.93912 * 180.22824 * 11 10 9 36 36 H 1.08998 * 109.46952 * 124.97692 * 13 12 11 37 37 H 0.96699 * 114.00267 * 180.02562 * 14 13 12 38 38 H 1.48498 * 110.00130 * 178.67915 * 15 13 12 39 39 H 1.48498 * 109.99774 * 300.00106 * 15 13 12 40 40 H 1.07998 * 119.93662 * 179.97438 * 16 12 11 41 41 H 1.08004 * 120.06809 * 179.97438 * 17 16 12 42 42 H 1.08006 * 119.98467 * 179.97438 * 18 8 7 43 43 H 1.08001 * 120.01095 * 179.97438 * 19 18 8 44 44 H 1.08993 * 109.47905 * 60.00334 * 22 20 2 45 45 H 1.09001 * 109.47280 * 299.99329 * 22 20 2 46 46 H 1.08999 * 109.46822 * 179.97438 * 23 22 20 47 47 H 1.09002 * 109.46835 * 59.99583 * 23 22 20 48 48 H 0.96699 * 114.00159 * 179.97438 * 26 24 23 49 49 H 1.08998 * 109.46895 * 59.99153 * 27 24 23 50 50 H 1.08996 * 109.47607 * 179.97438 * 27 24 23 51 51 H 1.09002 * 109.47155 * 300.00058 * 28 27 24 52 52 H 1.08992 * 109.47478 * 179.97438 * 28 27 24 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 7 1.4650 0.0000 0.0000 3 6 2.1388 1.1672 0.0000 4 8 3.3516 1.1689 0.0833 5 6 1.4036 2.4445 -0.1011 6 6 1.8956 3.4722 -0.9096 7 6 1.2066 4.6599 -1.0077 8 6 0.0237 4.8419 -0.2909 9 6 -0.7146 6.1238 -0.3928 10 6 -1.9002 6.3067 0.3172 11 6 -2.5805 7.5037 0.2223 12 6 -2.0935 8.5170 -0.5837 13 6 -2.8438 9.8198 -0.6873 14 8 -3.3250 9.9876 -2.0224 15 14 -4.2841 9.8027 0.4943 16 6 -0.9202 8.3392 -1.2947 17 6 -0.2289 7.1484 -1.2038 18 6 -0.4654 3.8185 0.5214 19 6 0.2187 2.6277 0.6159 20 6 2.1976 -1.2687 -0.0006 21 1 3.2692 -1.0695 0.0000 22 6 1.8279 -2.0715 1.2483 23 6 2.5934 -3.3964 1.2481 24 6 2.2243 -4.1983 -0.0016 25 1 1.1528 -4.3978 -0.0019 26 8 2.9397 -5.4354 -0.0022 27 6 2.5939 -3.3955 -1.2505 28 6 1.8285 -2.0707 -1.2502 29 1 -0.3634 0.0925 1.0234 30 1 -0.3634 0.8400 -0.5919 31 1 -0.3633 -0.9328 -0.4316 32 1 2.8139 3.3332 -1.4608 33 1 1.5842 5.4527 -1.6363 34 1 -2.2834 5.5148 0.9436 35 1 -3.4971 7.6479 0.7747 36 1 -2.1768 10.6442 -0.4352 37 1 -3.8184 10.8073 -2.1626 38 1 -5.0134 11.0943 0.4248 39 1 -5.2010 8.6831 0.1612 40 1 -0.5449 9.1336 -1.9227 41 1 0.6868 7.0104 -1.7596 42 1 -1.3811 3.9607 1.0762 43 1 -0.1600 1.8357 1.2451 44 1 0.7563 -2.2708 1.2483 45 1 2.0912 -1.5004 2.1386 46 1 2.3304 -3.9681 2.1380 47 1 3.6650 -3.1967 1.2484 48 1 2.7540 -5.9968 -0.7673 49 1 3.6655 -3.1958 -1.2501 50 1 2.3314 -3.9669 -2.1407 51 1 0.7569 -2.2703 -1.2505 52 1 2.0921 -1.4986 -2.1396 There are 68 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 68 No. of singly occupied orbitals= 1 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=0 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 s_22_9156390_13158362.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Mon Mar 8 2021 06:50:58 Heat of formation + Delta-G solvation = -55.945543 kcal Electronic energy + Delta-G solvation = -32203.873457 eV Core-core repulsion = 27906.593053 eV Total energy + Delta-G solvation = -4297.280403 eV No. of doubly occupied orbitals = 68 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 368.182 amu Computer time = 1.27 seconds Orbital eigenvalues (eV) -41.73717 -40.88008 -39.93154 -39.02959 -37.68441 -37.26166 -35.38103 -34.02858 -32.64520 -31.96003 -31.70265 -31.11684 -29.62223 -28.06869 -26.89049 -24.73964 -24.49334 -23.90235 -23.13659 -22.61434 -21.83749 -20.95637 -20.52929 -18.65441 -18.57506 -18.25909 -18.15178 -17.68553 -16.95244 -16.87095 -16.50659 -16.35739 -15.70590 -15.64270 -15.56028 -15.49799 -15.02995 -14.95446 -14.85835 -14.68310 -14.42932 -14.21380 -14.13331 -14.00397 -13.91849 -13.72028 -13.49687 -13.47803 -13.33348 -13.15254 -12.88490 -12.76479 -12.53797 -12.40777 -12.24643 -12.07479 -11.91415 -11.69738 -11.62508 -11.32568 -10.93044 -10.81355 -10.66720 -10.49438 -10.06307 -9.97837 -9.71682 -9.06047 -5.02244 -0.62028 0.32187 0.37866 0.56667 1.21572 1.53660 1.71600 1.87054 1.89480 2.50551 2.93272 3.16352 3.28310 3.33997 3.50101 3.57628 3.60481 3.63394 3.78474 3.80987 3.91366 3.92830 3.99850 4.01623 4.03334 4.12071 4.19848 4.21234 4.26281 4.29567 4.30499 4.34201 4.36639 4.40573 4.54340 4.60162 4.62784 4.66967 4.80106 4.84091 4.86955 4.90990 4.93518 5.01131 5.02057 5.06387 5.10964 5.18057 5.19475 5.26771 5.28522 5.38046 5.48116 5.49216 5.63860 5.77803 5.88757 6.27552 6.36996 6.66473 7.11814 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.068 3.932 2 N -0.607 5.607 3 C 0.561 3.439 4 O -0.530 6.530 5 C -0.130 4.130 6 C -0.061 4.061 7 C -0.115 4.115 8 C -0.020 4.020 9 C -0.048 4.048 10 C -0.101 4.101 11 C -0.113 4.113 12 C -0.067 4.067 13 C -0.078 4.078 14 O -0.536 6.536 15 Si 0.683 3.317 16 C -0.089 4.089 17 C -0.105 4.105 18 C -0.117 4.117 19 C -0.089 4.089 20 C 0.137 3.863 21 H 0.105 0.895 22 C -0.123 4.123 23 C -0.111 4.111 24 C 0.104 3.896 25 H 0.056 0.944 26 O -0.567 6.567 27 C -0.150 4.150 28 C -0.125 4.125 29 H 0.061 0.939 30 H 0.079 0.921 31 H 0.076 0.924 32 H 0.134 0.866 33 H 0.134 0.866 34 H 0.132 0.868 35 H 0.130 0.870 36 H 0.077 0.923 37 H 0.380 0.620 38 H -0.261 1.261 39 H -0.255 1.255 40 H 0.128 0.872 41 H 0.130 0.870 42 H 0.134 0.866 43 H 0.136 0.864 44 H 0.069 0.931 45 H 0.074 0.926 46 H 0.075 0.925 47 H 0.074 0.926 48 H 0.379 0.621 49 H 0.075 0.925 50 H 0.070 0.930 51 H 0.069 0.931 52 H 0.071 0.929 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -4.666 0.765 0.736 4.786 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 -0.074 4.074 2 N -0.339 5.339 3 C 0.350 3.650 4 O -0.407 6.407 5 C -0.133 4.133 6 C -0.080 4.080 7 C -0.133 4.133 8 C -0.020 4.020 9 C -0.048 4.048 10 C -0.118 4.118 11 C -0.130 4.130 12 C -0.067 4.067 13 C -0.188 4.188 14 O -0.343 6.343 15 Si 0.585 3.415 16 C -0.107 4.107 17 C -0.123 4.123 18 C -0.135 4.135 19 C -0.107 4.107 20 C 0.034 3.966 21 H 0.123 0.877 22 C -0.162 4.162 23 C -0.149 4.149 24 C 0.045 3.955 25 H 0.074 0.926 26 O -0.373 6.373 27 C -0.188 4.188 28 C -0.164 4.164 29 H 0.080 0.920 30 H 0.097 0.903 31 H 0.094 0.906 32 H 0.151 0.849 33 H 0.151 0.849 34 H 0.150 0.850 35 H 0.147 0.853 36 H 0.095 0.905 37 H 0.228 0.772 38 H -0.186 1.186 39 H -0.180 1.180 40 H 0.146 0.854 41 H 0.148 0.852 42 H 0.151 0.849 43 H 0.154 0.846 44 H 0.087 0.913 45 H 0.093 0.907 46 H 0.094 0.906 47 H 0.093 0.907 48 H 0.226 0.774 49 H 0.094 0.906 50 H 0.089 0.911 51 H 0.087 0.913 52 H 0.090 0.910 Dipole moment (debyes) X Y Z Total from point charges -4.364 0.487 1.359 4.597 hybrid contribution -0.568 0.500 -1.653 1.818 sum -4.932 0.988 -0.294 5.038 Atomic orbital electron populations 1.22127 0.79507 1.03843 1.01946 1.47787 1.07093 1.05546 1.73499 1.18417 0.87036 0.83585 0.75968 1.90811 1.13626 1.87099 1.49183 1.19883 0.96730 0.94820 1.01868 1.21108 0.98841 0.91585 0.96460 1.21202 0.94689 0.97599 0.99837 1.18964 0.94262 0.92756 0.96056 1.18808 0.95019 0.92976 0.98045 1.21170 0.94300 0.97263 0.99100 1.20930 0.99832 0.93061 0.99225 1.19347 0.95342 0.94315 0.97744 1.24830 1.05426 0.97483 0.91023 1.86592 1.74778 1.45923 1.27012 0.95021 0.78426 0.80418 0.87669 1.20951 0.94309 0.97457 0.98013 1.21306 1.00013 0.92777 0.98185 1.21175 1.00545 0.92603 0.99173 1.21469 0.93255 0.97854 0.98125 1.21203 0.98560 0.82089 0.94721 0.87675 1.21836 1.00771 0.95498 0.98077 1.21433 1.01526 0.94605 0.97352 1.21840 0.94860 0.83945 0.94861 0.92643 1.86532 1.70267 1.30884 1.49631 1.22241 1.01787 0.96213 0.98558 1.21829 1.00742 0.95786 0.98003 0.92044 0.90285 0.90569 0.84854 0.84870 0.85045 0.85269 0.90475 0.77176 1.18608 1.17956 0.85436 0.85248 0.84867 0.84611 0.91264 0.90682 0.90607 0.90735 0.77355 0.90626 0.91114 0.91270 0.91041 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 0.07 -0.18 7.95 59.85 0.48 0.29 16 2 N -0.61 -0.19 2.76 -175.09 -0.48 -0.68 16 3 C 0.56 1.71 7.32 -12.39 -0.09 1.62 16 4 O -0.53 -3.65 16.28 5.31 0.09 -3.56 16 5 C -0.13 -0.19 5.16 -104.92 -0.54 -0.74 16 6 C -0.06 -0.09 9.63 -39.24 -0.38 -0.46 16 7 C -0.12 -0.05 9.41 -39.32 -0.37 -0.42 16 8 C -0.02 -0.01 5.88 -104.82 -0.62 -0.62 16 9 C -0.05 -0.03 5.88 -104.90 -0.62 -0.64 16 10 C -0.10 0.02 9.43 -39.23 -0.37 -0.35 16 11 C -0.11 -0.01 8.65 -39.63 -0.34 -0.35 16 12 C -0.07 -0.06 5.39 -104.55 -0.56 -0.62 16 13 C -0.08 0.03 2.79 36.01 0.10 0.13 16 14 O -0.54 -0.49 12.81 -35.23 -0.45 -0.94 16 15 Si 0.68 -0.86 29.84 -169.99 -5.07 -5.94 16 16 C -0.09 -0.07 9.67 -39.63 -0.38 -0.46 16 17 C -0.11 -0.05 9.43 -39.24 -0.37 -0.42 16 18 C -0.12 0.09 9.41 -39.32 -0.37 -0.28 16 19 C -0.09 0.05 7.60 -39.25 -0.30 -0.25 16 20 C 0.14 0.03 2.51 -67.93 -0.17 -0.14 16 21 H 0.11 0.28 6.91 -51.93 -0.36 -0.08 16 22 C -0.12 0.10 5.20 -26.72 -0.14 -0.04 16 23 C -0.11 0.00 5.57 -26.73 -0.15 -0.15 16 24 C 0.10 -0.06 3.47 -26.73 -0.09 -0.15 16 25 H 0.06 -0.08 8.14 -51.93 -0.42 -0.50 16 26 O -0.57 -0.46 13.32 -35.23 -0.47 -0.93 16 27 C -0.15 0.17 5.54 -26.73 -0.15 0.02 16 28 C -0.13 0.14 5.19 -26.73 -0.14 0.00 16 29 H 0.06 -0.24 6.85 -51.93 -0.36 -0.59 16 30 H 0.08 -0.21 6.00 -51.93 -0.31 -0.53 16 31 H 0.08 -0.29 6.44 -51.92 -0.33 -0.62 16 32 H 0.13 0.16 8.06 -52.49 -0.42 -0.26 16 33 H 0.13 -0.18 6.19 -52.49 -0.32 -0.50 16 34 H 0.13 -0.33 6.19 -52.48 -0.33 -0.65 16 35 H 0.13 -0.21 4.85 -52.49 -0.25 -0.46 16 36 H 0.08 -0.16 7.96 -51.93 -0.41 -0.57 16 37 H 0.38 -1.15 8.74 45.56 0.40 -0.75 16 38 H -0.26 -0.21 7.11 56.52 0.40 0.19 16 39 H -0.25 -0.44 7.04 56.52 0.40 -0.04 16 40 H 0.13 -0.01 8.06 -52.49 -0.42 -0.43 16 41 H 0.13 -0.17 6.19 -52.48 -0.33 -0.49 16 42 H 0.13 -0.39 6.19 -52.48 -0.32 -0.71 16 43 H 0.14 -0.35 5.52 -52.49 -0.29 -0.64 16 44 H 0.07 -0.14 7.67 -51.93 -0.40 -0.54 16 45 H 0.07 0.00 8.14 -51.93 -0.42 -0.43 16 46 H 0.08 0.01 8.14 -51.93 -0.42 -0.41 16 47 H 0.07 0.08 8.14 -51.93 -0.42 -0.34 16 48 H 0.38 -1.18 9.08 45.56 0.41 -0.76 16 49 H 0.08 0.01 8.14 -51.93 -0.42 -0.42 16 50 H 0.07 -0.15 8.14 -51.93 -0.42 -0.57 16 51 H 0.07 -0.15 6.67 -51.93 -0.35 -0.50 16 52 H 0.07 -0.02 8.14 -51.93 -0.42 -0.44 16 LS Contribution 404.78 15.07 6.10 6.10 Total: 0.00 -9.60 404.78 -12.42 -22.01 By element: Atomic # 1 Polarization: -5.51 SS G_CDS: -6.56 Total: -12.06 kcal Atomic # 6 Polarization: 1.57 SS G_CDS: -5.57 Total: -4.00 kcal Atomic # 7 Polarization: -0.19 SS G_CDS: -0.48 Total: -0.68 kcal Atomic # 8 Polarization: -4.60 SS G_CDS: -0.83 Total: -5.44 kcal Atomic # 14 Polarization: -0.86 SS G_CDS: -5.07 Total: -5.94 kcal Total LS contribution 6.10 Total: 6.10 kcal Total: -9.60 -12.42 -22.01 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. s_22_9156390_13158362.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 -33.932 kcal (2) G-P(sol) polarization free energy of solvation -9.596 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -43.528 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -12.418 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -22.014 kcal (6) G-S(sol) free energy of system = (1) + (5) -55.946 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.27 seconds