Wall clock time and date at job start Sat Mar 6 2021 19:33:14 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 * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS WATER ******************************************************************************* 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 1.52992 * 1 3 3 C 1.53007 * 109.47350 * 2 1 4 4 C 1.53002 * 109.46933 * 240.00602 * 2 1 3 5 5 O 1.45197 * 109.47495 * 120.00322 * 2 1 3 6 6 C 1.34234 * 116.99869 * 59.99837 * 5 2 1 7 7 O 1.20825 * 120.00078 * 359.97438 * 6 5 2 8 8 C 1.50698 * 119.99460 * 180.02562 * 6 5 2 9 9 H 1.09000 * 112.85273 * 48.80769 * 8 6 5 10 10 C 1.53791 * 113.60939 * 179.97438 * 8 6 5 11 11 C 1.53786 * 87.07966 * 139.97988 * 10 8 6 12 12 H 1.08998 * 113.60870 * 89.19954 * 11 10 8 13 13 N 1.46499 * 113.61394 * 220.01815 * 11 10 8 14 14 C 1.34777 * 119.99665 * 205.27970 * 13 11 10 15 15 O 1.21583 * 120.00270 * 359.72083 * 14 13 11 16 16 C 1.47563 * 119.99792 * 179.72389 * 14 13 11 17 17 C 1.40213 * 120.12386 * 179.71933 * 16 14 13 18 18 O 1.35653 * 120.00016 * 0.02562 * 17 16 14 19 19 C 1.38815 * 119.99799 * 179.78785 * 17 16 14 20 20 C 1.37772 * 120.24032 * 0.47086 * 19 17 16 21 21 C 1.39836 * 120.24892 * 359.78465 * 20 19 17 22 22 C 1.47816 * 120.00222 * 179.97438 * 21 20 19 23 23 C 1.35940 * 125.93242 * 0.02562 * 22 21 20 24 24 C 1.40962 * 106.74521 * 180.02562 * 23 22 21 25 25 C 1.34707 * 107.02923 * 0.02562 * 24 23 22 26 26 C 1.50705 * 125.66313 * 180.02562 * 25 24 23 27 27 O 1.42897 * 109.47169 * 65.00100 * 26 25 24 28 28 Si 1.86297 * 109.46789 * 184.99621 * 26 25 24 29 29 O 1.34338 * 108.67251 * 359.73176 * 25 24 23 30 30 C 1.39178 * 120.00334 * 359.97438 * 21 20 19 31 31 C 1.53778 * 87.08287 * 334.56878 * 11 10 8 32 32 H 1.09007 * 109.46943 * 299.99433 * 1 2 3 33 33 H 1.08997 * 109.47876 * 59.99792 * 1 2 3 34 34 H 1.08998 * 109.47374 * 180.02562 * 1 2 3 35 35 H 1.08996 * 109.46845 * 180.02562 * 3 2 1 36 36 H 1.09007 * 109.46788 * 300.00328 * 3 2 1 37 37 H 1.08999 * 109.46554 * 60.00038 * 3 2 1 38 38 H 1.09008 * 109.46749 * 299.99553 * 4 2 1 39 39 H 1.08990 * 109.47565 * 59.99180 * 4 2 1 40 40 H 1.08996 * 109.47488 * 180.02562 * 4 2 1 41 41 H 1.08999 * 113.61698 * 25.43341 * 10 8 6 42 42 H 1.09001 * 113.60977 * 254.52797 * 10 8 6 43 43 H 0.97001 * 119.99790 * 24.99683 * 13 11 10 44 44 H 0.96703 * 113.99794 * 89.99780 * 18 17 16 45 45 H 1.07991 * 119.88016 * 180.23132 * 19 17 16 46 46 H 1.08011 * 119.87458 * 179.76372 * 20 19 17 47 47 H 1.08007 * 126.62252 * 0.02562 * 23 22 21 48 48 H 1.08004 * 126.48400 * 180.02562 * 24 23 22 49 49 H 1.08996 * 109.47309 * 304.99587 * 26 25 24 50 50 H 0.96696 * 114.00294 * 59.99643 * 27 26 25 51 51 H 1.48504 * 109.99826 * 179.97438 * 28 26 25 52 52 H 1.48492 * 110.00487 * 301.31734 * 28 26 25 53 53 H 1.08000 * 120.12637 * 180.02562 * 30 21 20 54 54 H 1.08997 * 113.61721 * 139.97826 * 31 11 10 55 55 H 1.09004 * 113.61436 * 270.88721 * 31 11 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 1.5299 0.0000 0.0000 3 6 2.0400 1.4425 0.0000 4 6 2.0399 -0.7211 -1.2493 5 8 2.0140 -0.6845 1.1855 6 6 1.6533 -1.9685 1.3377 7 8 0.9559 -2.5025 0.5081 8 6 2.1175 -2.7434 2.5440 9 1 1.9534 -2.2087 3.4795 10 6 1.6189 -4.1981 2.5708 11 6 3.0127 -4.5832 3.0943 12 1 3.0946 -4.5531 4.1807 13 7 3.5329 -5.8260 2.5188 14 6 4.4417 -6.5541 3.1973 15 8 4.8336 -6.1770 4.2847 16 6 4.9612 -7.8090 2.6203 17 6 5.9111 -8.5655 3.3213 18 8 6.3538 -8.1445 4.5325 19 6 6.3947 -9.7479 2.7781 20 6 5.9520 -10.1777 1.5463 21 6 5.0089 -9.4284 0.8360 22 6 4.5381 -9.8943 -0.4855 23 6 4.9385 -11.0274 -1.1210 24 6 4.2395 -11.0757 -2.3441 25 6 3.4559 -9.9811 -2.3942 26 6 2.5276 -9.6160 -3.5238 27 8 1.4882 -10.5919 -3.6205 28 14 1.7788 -7.9419 -3.1957 29 8 3.6346 -9.2723 -1.2671 30 6 4.5133 -8.2440 1.3732 31 6 3.5376 -3.3156 2.3996 32 1 -0.3633 0.5138 0.8901 33 1 -0.3635 0.5138 -0.8899 34 1 -0.3634 -1.0276 0.0005 35 1 3.1300 1.4425 -0.0005 36 1 1.6766 1.9564 -0.8900 37 1 1.6767 1.9563 0.8900 38 1 1.6765 -1.7489 -1.2493 39 1 1.6765 -0.2074 -2.1392 40 1 3.1298 -0.7216 -1.2492 41 1 1.3966 -4.6017 1.5830 42 1 0.8188 -4.3721 3.2902 43 1 3.2202 -6.1268 1.6512 44 1 5.8325 -8.4730 5.2777 45 1 7.1235 -10.3310 3.3213 46 1 6.3351 -11.0966 1.1275 47 1 5.6540 -11.7508 -0.7586 48 1 4.3174 -11.8447 -3.0984 49 1 3.0869 -9.5869 -4.4588 50 1 0.9485 -10.6722 -2.8223 51 1 0.8616 -7.5700 -4.3029 52 1 1.0400 -7.9595 -1.9078 53 1 3.7846 -7.6640 0.8265 54 1 4.2863 -2.7774 2.9808 55 1 3.8397 -3.4780 1.3650 There are 77 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 77 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=WATER s_22_12626394_13259648.mol2 55 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sat Mar 6 2021 19:33:14 Heat of formation + Delta-G solvation = -116.160820 kcal Electronic energy + Delta-G solvation = -40137.453865 eV Core-core repulsion = 34881.515755 eV Total energy + Delta-G solvation = -5255.938110 eV No. of doubly occupied orbitals = 77 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 416.181 amu Computer time = 1.90 seconds Orbital eigenvalues (eV) -43.70418 -42.22382 -41.55662 -40.29719 -39.07556 -38.21903 -37.84854 -37.67074 -35.14240 -34.71701 -34.14270 -32.75821 -32.27113 -30.05837 -28.41976 -28.34396 -27.89667 -26.84727 -26.40232 -25.36407 -23.77931 -23.28423 -22.70458 -21.77965 -21.39557 -21.06231 -20.41232 -19.56672 -19.15884 -18.64128 -18.34984 -17.73635 -17.57802 -17.46296 -17.14169 -16.95669 -16.72952 -16.39189 -16.30488 -16.14346 -15.83393 -15.79148 -15.46556 -15.28381 -15.01279 -14.65361 -14.51848 -14.38651 -14.32955 -13.95393 -13.81440 -13.73490 -13.62780 -13.50093 -13.39387 -13.22284 -13.14232 -13.11012 -12.97634 -12.90440 -12.90157 -12.61554 -12.46919 -12.42071 -12.18178 -12.04743 -11.85783 -11.74098 -11.42675 -11.06872 -11.00637 -10.87429 -10.81200 -10.48741 -10.32237 -10.08577 -8.91016 -4.99981 -0.55964 -0.21518 0.76760 1.12065 1.13226 1.44468 1.48583 1.59655 1.68740 1.85295 1.88905 2.08566 2.62237 3.11409 3.20396 3.22255 3.28757 3.31440 3.49159 3.61150 3.63666 3.68477 3.71575 3.75978 3.88863 3.91106 3.96457 4.01829 4.06993 4.20931 4.35026 4.43576 4.48262 4.53688 4.55504 4.56336 4.61197 4.64537 4.67889 4.72186 4.76143 4.79311 4.81176 4.83664 4.88246 4.88941 4.90969 5.02171 5.05021 5.08924 5.14699 5.20769 5.21209 5.24740 5.42168 5.44822 5.51259 5.53964 5.98071 6.32651 6.37746 6.73901 6.77186 7.08258 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.181 4.181 2 C 0.107 3.893 3 C -0.140 4.140 4 C -0.180 4.180 5 O -0.356 6.356 6 C 0.474 3.526 7 O -0.522 6.522 8 C -0.107 4.107 9 H 0.147 0.853 10 C -0.119 4.119 11 C 0.126 3.874 12 H 0.119 0.881 13 N -0.708 5.708 14 C 0.560 3.440 15 O -0.553 6.553 16 C -0.180 4.180 17 C 0.166 3.834 18 O -0.494 6.494 19 C -0.146 4.146 20 C -0.044 4.044 21 C -0.042 4.042 22 C 0.023 3.977 23 C -0.189 4.189 24 C -0.179 4.179 25 C -0.055 4.055 26 C -0.033 4.033 27 O -0.535 6.535 28 Si 0.759 3.241 29 O -0.175 6.175 30 C -0.052 4.052 31 C -0.129 4.129 32 H 0.063 0.937 33 H 0.085 0.915 34 H 0.064 0.936 35 H 0.068 0.932 36 H 0.094 0.906 37 H 0.068 0.932 38 H 0.066 0.934 39 H 0.085 0.915 40 H 0.064 0.936 41 H 0.097 0.903 42 H 0.098 0.902 43 H 0.410 0.590 44 H 0.411 0.589 45 H 0.165 0.835 46 H 0.165 0.835 47 H 0.175 0.825 48 H 0.163 0.837 49 H 0.154 0.846 50 H 0.390 0.610 51 H -0.285 1.285 52 H -0.287 1.287 53 H 0.145 0.855 54 H 0.091 0.909 55 H 0.089 0.911 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 0.985 -0.731 -1.362 1.832 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 -0.238 4.238 2 C 0.071 3.929 3 C -0.197 4.197 4 C -0.238 4.238 5 O -0.273 6.273 6 C 0.318 3.682 7 O -0.411 6.411 8 C -0.126 4.126 9 H 0.165 0.835 10 C -0.157 4.157 11 C 0.021 3.979 12 H 0.137 0.863 13 N -0.360 5.360 14 C 0.349 3.651 15 O -0.432 6.432 16 C -0.184 4.184 17 C 0.119 3.881 18 O -0.307 6.307 19 C -0.165 4.165 20 C -0.062 4.062 21 C -0.042 4.042 22 C -0.027 4.027 23 C -0.208 4.208 24 C -0.199 4.199 25 C -0.105 4.105 26 C -0.142 4.142 27 O -0.343 6.343 28 Si 0.663 3.337 29 O -0.073 6.073 30 C -0.071 4.071 31 C -0.168 4.168 32 H 0.082 0.918 33 H 0.104 0.896 34 H 0.083 0.917 35 H 0.087 0.913 36 H 0.113 0.887 37 H 0.087 0.913 38 H 0.084 0.916 39 H 0.104 0.896 40 H 0.083 0.917 41 H 0.116 0.884 42 H 0.117 0.883 43 H 0.247 0.753 44 H 0.272 0.728 45 H 0.182 0.818 46 H 0.183 0.817 47 H 0.193 0.807 48 H 0.181 0.819 49 H 0.171 0.829 50 H 0.240 0.760 51 H -0.212 1.212 52 H -0.213 1.213 53 H 0.163 0.837 54 H 0.109 0.891 55 H 0.108 0.892 Dipole moment (debyes) X Y Z Total from point charges 0.825 0.369 -1.562 1.805 hybrid contribution -1.279 -1.285 0.147 1.819 sum -0.454 -0.915 -1.415 1.746 Atomic orbital electron populations 1.22461 0.94017 1.03639 1.03652 1.22438 0.94500 0.93260 0.82698 1.21886 1.02393 0.91355 1.04024 1.22463 1.01835 1.02190 0.97269 1.86572 1.69660 1.25355 1.45700 1.23701 0.76520 0.80534 0.87423 1.90581 1.36062 1.70360 1.44109 1.22421 0.99080 0.95020 0.96092 0.83505 1.23329 0.96893 0.91786 1.03685 1.22448 0.93741 0.82054 0.99614 0.86306 1.45842 1.43028 1.24157 1.22987 1.18245 0.78843 0.83561 0.84479 1.90806 1.59063 1.71548 1.21818 1.20265 1.02187 0.98049 0.97873 1.18872 0.90491 0.91151 0.87545 1.84710 1.56651 1.75226 1.14138 1.21587 1.02388 0.95395 0.97088 1.21421 0.92781 0.99400 0.92612 1.17704 0.99784 0.96183 0.90574 1.20466 0.95078 0.94425 0.92686 1.22162 1.04311 0.98819 0.95489 1.21801 0.98729 0.99627 0.99701 1.23019 1.03984 0.94628 0.88847 1.24447 0.89805 1.03070 0.96905 1.86639 1.45535 1.59029 1.43140 0.93740 0.84601 0.78405 0.76932 1.83914 1.50243 1.46817 1.26283 1.21393 0.97649 0.95022 0.93057 1.23406 0.94734 0.96065 1.02578 0.91827 0.89621 0.91711 0.91278 0.88741 0.91316 0.91551 0.89618 0.91711 0.88408 0.88338 0.75253 0.72832 0.81775 0.81706 0.80713 0.81949 0.82878 0.76047 1.21172 1.21319 0.83709 0.89064 0.89204 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 -0.18 -0.32 8.37 71.98 0.60 0.28 16 2 C 0.11 0.18 1.13 -10.79 -0.01 0.17 16 3 C -0.14 0.30 8.85 71.98 0.64 0.94 16 4 C -0.18 -0.24 8.37 71.98 0.60 0.36 16 5 O -0.36 -1.37 9.89 -51.45 -0.51 -1.88 16 6 C 0.47 1.56 6.79 71.24 0.48 2.05 16 7 O -0.52 -3.79 11.40 21.97 0.25 -3.54 16 8 C -0.11 0.23 4.26 -11.01 -0.05 0.18 16 9 H 0.15 -0.83 8.14 -2.39 -0.02 -0.85 16 10 C -0.12 0.35 7.16 31.13 0.22 0.58 16 11 C 0.13 -0.16 4.24 45.52 0.19 0.03 16 12 H 0.12 0.06 7.46 -2.39 -0.02 0.04 16 13 N -0.71 0.11 5.30 -443.18 -2.35 -2.24 16 14 C 0.56 2.99 7.76 86.70 0.67 3.66 16 15 O -0.55 -6.65 14.74 17.01 0.25 -6.40 16 16 C -0.18 -0.49 5.88 -20.04 -0.12 -0.61 16 17 C 0.17 0.39 6.72 22.89 0.15 0.54 16 18 O -0.49 -2.12 11.55 -68.69 -0.79 -2.91 16 19 C -0.15 0.39 9.96 22.30 0.22 0.62 16 20 C -0.04 0.18 9.54 22.55 0.22 0.39 16 21 C -0.04 0.04 5.87 -20.13 -0.12 -0.08 16 22 C 0.02 0.01 7.03 24.27 0.17 0.18 16 23 C -0.19 0.27 10.26 22.40 0.23 0.50 16 24 C -0.18 0.05 10.78 22.13 0.24 0.29 16 25 C -0.06 -0.01 6.20 24.88 0.15 0.15 16 26 C -0.03 0.06 2.98 71.24 0.21 0.28 16 27 O -0.54 -0.25 12.88 -148.98 -1.92 -2.17 16 28 Si 0.76 -1.05 32.11 68.60 2.20 1.15 16 29 O -0.17 -0.23 8.80 -6.60 -0.06 -0.29 16 30 C -0.05 0.02 9.20 22.79 0.21 0.23 16 31 C -0.13 0.24 7.43 31.12 0.23 0.47 16 32 H 0.06 0.08 8.14 -2.38 -0.02 0.06 16 33 H 0.08 -0.10 8.14 -2.39 -0.02 -0.11 16 34 H 0.06 0.38 5.89 -2.39 -0.01 0.37 16 35 H 0.07 -0.15 8.14 -2.39 -0.02 -0.17 16 36 H 0.09 -0.49 8.14 -2.38 -0.02 -0.50 16 37 H 0.07 -0.15 8.14 -2.39 -0.02 -0.17 16 38 H 0.07 0.34 5.89 -2.38 -0.01 0.32 16 39 H 0.08 -0.13 8.14 -2.39 -0.02 -0.15 16 40 H 0.06 0.05 8.14 -2.39 -0.02 0.03 16 41 H 0.10 -0.15 7.41 -2.39 -0.02 -0.17 16 42 H 0.10 -0.47 8.14 -2.39 -0.02 -0.49 16 43 H 0.41 -1.63 6.75 -92.71 -0.63 -2.26 16 44 H 0.41 -1.20 9.06 -74.05 -0.67 -1.87 16 45 H 0.16 -1.13 8.06 -2.92 -0.02 -1.15 16 46 H 0.17 -1.57 6.96 -2.90 -0.02 -1.59 16 47 H 0.18 -1.16 7.25 -2.91 -0.02 -1.18 16 48 H 0.16 -0.41 8.06 -2.91 -0.02 -0.44 16 49 H 0.15 -0.83 7.96 -2.39 -0.02 -0.85 16 50 H 0.39 -1.78 8.70 -74.06 -0.64 -2.42 16 51 H -0.29 -1.35 7.11 99.48 0.71 -0.64 16 52 H -0.29 -1.14 7.11 99.48 0.71 -0.43 16 53 H 0.15 -0.51 6.24 -2.91 -0.02 -0.53 16 54 H 0.09 -0.16 8.14 -2.39 -0.02 -0.18 16 55 H 0.09 -0.11 8.09 -2.39 -0.02 -0.13 16 Total: 0.00 -23.82 454.86 1.30 -22.52 By element: Atomic # 1 Polarization: -14.52 SS G_CDS: -0.93 Total: -15.45 kcal Atomic # 6 Polarization: 6.05 SS G_CDS: 5.16 Total: 11.20 kcal Atomic # 7 Polarization: 0.11 SS G_CDS: -2.35 Total: -2.24 kcal Atomic # 8 Polarization: -14.41 SS G_CDS: -2.78 Total: -17.18 kcal Atomic # 14 Polarization: -1.05 SS G_CDS: 2.20 Total: 1.15 kcal Total: -23.82 1.30 -22.52 kcal The number of atoms in the molecule is 55 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_12626394_13259648.mol2 55 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 -93.643 kcal (2) G-P(sol) polarization free energy of solvation -23.820 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -117.463 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy 1.302 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -22.518 kcal (6) G-S(sol) free energy of system = (1) + (5) -116.161 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.90 seconds