Wall clock time and date at job start Sat Mar 6 2021 03:32:08 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 O 2 2 C 1.42899 * 1 3 3 Si 1.86295 * 109.47196 * 2 1 4 4 C 1.50703 * 109.47055 * 120.00061 * 2 1 3 5 5 C 1.34493 * 125.49233 * 210.33561 * 4 2 1 6 6 C 1.46750 * 106.36233 * 180.13672 * 5 4 2 7 7 C 1.47264 * 126.96967 * 179.81969 * 6 5 4 8 8 O 1.21625 * 120.00359 * 179.68682 * 7 6 5 9 9 N 1.34777 * 119.99771 * 359.69062 * 7 6 5 10 10 C 1.46504 * 119.99967 * 179.97438 * 9 7 6 11 11 H 1.08994 * 112.84698 * 23.80768 * 10 9 7 12 12 C 1.53783 * 113.61375 * 154.99859 * 10 9 7 13 13 C 1.53778 * 87.08137 * 89.11707 * 12 10 9 14 14 H 1.09001 * 113.61755 * 270.80260 * 13 12 10 15 15 C 1.50699 * 113.61400 * 139.97960 * 13 12 10 16 16 C 1.38004 * 119.93876 * 121.51131 * 15 13 12 17 17 C 1.39329 * 119.87820 * 180.02562 * 16 15 13 18 18 C 1.48469 * 120.11506 * 180.02562 * 17 16 15 19 19 N 1.31810 * 126.67470 * 179.97438 * 18 17 16 20 20 N 1.28866 * 107.82093 * 180.02562 * 19 18 17 21 21 N 1.28735 * 109.31668 * 359.97438 * 20 19 18 22 22 N 1.28987 * 108.94013 * 359.72617 * 21 20 19 23 23 C 1.39271 * 119.76763 * 0.02562 * 17 16 15 24 24 C 1.38055 * 119.88127 * 0.02562 * 23 17 16 25 25 C 1.38292 * 120.11393 * 359.97438 * 24 23 17 26 26 C 1.53785 * 87.17105 * 25.39074 * 13 12 10 27 27 C 1.36334 * 106.06494 * 359.56269 * 6 5 4 28 28 C 1.51000 * 126.79714 * 180.30410 * 27 6 5 29 29 C 1.53390 * 108.25825 * 164.30346 * 28 27 6 30 30 C 1.53157 * 109.04519 * 48.45621 * 29 28 27 31 31 C 1.53130 * 109.52580 * 290.43217 * 30 29 28 32 32 N 1.35215 * 108.65837 * 0.28067 * 27 6 5 33 33 H 0.96704 * 114.00069 * 60.00178 * 1 2 3 34 34 H 1.09004 * 109.46952 * 239.99658 * 2 1 3 35 35 H 1.48505 * 109.99901 * 298.67997 * 3 2 1 36 36 H 1.48501 * 109.99834 * 59.99885 * 3 2 1 37 37 H 1.08000 * 126.82120 * 359.97301 * 5 4 2 38 38 H 0.96996 * 120.00298 * 0.02562 * 9 7 6 39 39 H 1.09000 * 113.61449 * 334.57244 * 12 10 9 40 40 H 1.08998 * 113.69395 * 203.68055 * 12 10 9 41 41 H 1.08000 * 120.06267 * 359.97438 * 16 15 13 42 42 H 0.97001 * 125.34481 * 180.02562 * 20 19 18 43 43 H 1.08001 * 120.06052 * 180.27950 * 23 17 16 44 44 H 1.07997 * 119.94171 * 179.97438 * 24 23 17 45 45 H 1.08006 * 119.87891 * 179.97438 * 25 24 23 46 46 H 1.08994 * 113.61268 * 89.16005 * 26 13 12 47 47 H 1.09003 * 113.60972 * 220.06005 * 26 13 12 48 48 H 1.09003 * 109.70571 * 283.99842 * 28 27 6 49 49 H 1.09001 * 109.70454 * 44.57224 * 28 27 6 50 50 H 1.08997 * 109.54295 * 168.32435 * 29 28 27 51 51 H 1.09001 * 109.53941 * 288.59206 * 29 28 27 52 52 H 1.09002 * 109.46103 * 50.44681 * 30 29 28 53 53 H 1.09002 * 109.46487 * 170.41380 * 30 29 28 54 54 H 1.09002 * 109.56578 * 170.83494 * 31 30 29 55 55 H 1.09003 * 109.56231 * 291.17237 * 31 30 29 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 8 0.0000 0.0000 0.0000 2 6 1.4290 0.0000 0.0000 3 14 2.0500 1.7564 0.0000 4 6 1.9313 -0.7104 1.2305 5 6 3.0827 -0.4421 1.8718 6 6 3.1551 -1.3774 3.0002 7 6 4.2332 -1.4795 3.9982 8 8 4.1603 -2.3031 4.8901 9 7 5.3007 -0.6601 3.9231 10 6 6.3730 -0.7612 4.9162 11 1 6.4218 -1.7426 5.3879 12 6 7.7328 -0.2536 4.4083 13 6 7.3171 1.1355 4.9204 14 1 6.7785 1.7299 4.1823 15 6 8.4385 1.8965 5.5793 16 6 8.8156 3.1299 5.0882 17 6 9.8530 3.8322 5.6980 18 6 10.2625 5.1597 5.1743 19 7 11.2202 5.9316 5.6481 20 7 11.2645 6.9956 4.9223 21 7 10.3658 6.9220 4.0035 22 7 9.7343 5.8038 4.1241 23 6 10.5044 3.2845 6.8004 24 6 10.1200 2.0495 7.2829 25 6 9.0896 1.3567 6.6739 26 6 6.3973 0.4090 5.9161 27 6 2.0191 -2.1289 2.9409 28 6 1.6146 -3.2332 3.8880 29 6 0.1218 -3.5198 3.6825 30 6 -0.1565 -3.6704 2.1839 31 6 -0.0052 -2.3107 1.4961 32 7 1.2884 -1.7251 1.8772 33 1 -0.3933 0.4417 -0.7651 34 1 1.7923 -0.5139 -0.8900 35 1 1.5879 2.4585 -1.2243 36 1 1.5614 2.4678 1.2085 37 1 3.8108 0.3104 1.6071 38 1 5.3586 -0.0030 3.2121 39 1 7.8412 -0.3050 3.3249 40 1 8.5849 -0.6778 4.9394 41 1 8.3080 3.5496 4.2323 42 1 11.8791 7.7354 5.0480 43 1 11.3062 3.8268 7.2795 44 1 10.6247 1.6237 8.1375 45 1 8.7923 0.3906 7.0543 46 1 6.8827 0.1658 6.8613 47 1 5.4290 0.8919 6.0483 48 1 2.1942 -4.1313 3.6743 49 1 1.7908 -2.9182 4.9165 50 1 -0.1467 -4.4421 4.1976 51 1 -0.4664 -2.6933 4.0812 52 1 0.5525 -4.3768 1.7521 53 1 -1.1716 -4.0401 2.0384 54 1 -0.0417 -2.4426 0.4147 55 1 -0.8123 -1.6499 1.8123 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 m_280130_17857610_17964112.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 03:32:08 Heat of formation + Delta-G solvation = 152.386681 kcal Electronic energy + Delta-G solvation = -39360.678047 eV Core-core repulsion = 34368.230584 eV Total energy + Delta-G solvation = -4992.447462 eV No. of doubly occupied orbitals = 77 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 421.190 amu Computer time = 1.89 seconds Orbital eigenvalues (eV) -45.46972 -42.72904 -41.35860 -40.06263 -38.66580 -37.98657 -36.87582 -35.44178 -34.80158 -34.10717 -33.49000 -31.96608 -31.35978 -31.17208 -29.42244 -26.80654 -26.57339 -26.23563 -25.51756 -25.45074 -24.52578 -23.90463 -23.01754 -22.04132 -21.61029 -21.19494 -20.37893 -19.81778 -19.30461 -18.59918 -18.30607 -18.15405 -17.85696 -16.92993 -16.89088 -16.49346 -16.45631 -16.09571 -15.97396 -15.73264 -15.49280 -15.24448 -15.16086 -15.14829 -14.98444 -14.63063 -14.58108 -14.39376 -14.24941 -14.22333 -14.01751 -13.88045 -13.41449 -13.33193 -13.21604 -13.16476 -12.88809 -12.74449 -12.45640 -12.41714 -12.38668 -12.21138 -12.18003 -12.02400 -11.98766 -11.86823 -11.78809 -11.65590 -11.49045 -11.11462 -10.86999 -10.72496 -9.98522 -9.72327 -9.54347 -9.48469 -8.98035 -4.90013 -0.25741 0.17718 0.44567 0.75618 1.05886 1.33812 1.41293 1.51059 1.63797 1.84007 2.05564 2.45239 2.57743 2.67911 2.82766 3.13601 3.16442 3.55422 3.59599 3.60686 3.74028 3.81129 3.81983 3.84415 3.86576 4.02028 4.11139 4.14664 4.18261 4.26439 4.33052 4.34084 4.37462 4.40259 4.42601 4.45493 4.48750 4.63366 4.64488 4.76021 4.78364 4.79916 4.84459 4.89612 4.93601 4.95176 5.01164 5.02020 5.09762 5.15772 5.16383 5.19787 5.20768 5.32827 5.48516 5.52377 5.59915 5.65925 5.76901 5.81453 5.99552 6.10305 6.24353 6.53057 6.74907 7.10511 7.43038 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 O -0.558 6.558 2 C -0.056 4.056 3 Si 0.790 3.210 4 C 0.019 3.981 5 C -0.165 4.165 6 C -0.255 4.255 7 C 0.593 3.407 8 O -0.588 6.588 9 N -0.698 5.698 10 C 0.117 3.883 11 H 0.086 0.914 12 C -0.123 4.123 13 C -0.066 4.066 14 H 0.110 0.890 15 C -0.072 4.072 16 C -0.080 4.080 17 C -0.036 4.036 18 C 0.209 3.791 19 N -0.299 5.299 20 N -0.203 5.203 21 N -0.059 5.059 22 N -0.293 5.293 23 C -0.091 4.091 24 C -0.119 4.119 25 C -0.095 4.095 26 C -0.142 4.142 27 C 0.098 3.902 28 C -0.053 4.053 29 C -0.125 4.125 30 C -0.134 4.134 31 C 0.112 3.888 32 N -0.429 5.429 33 H 0.400 0.600 34 H 0.101 0.899 35 H -0.279 1.279 36 H -0.309 1.309 37 H 0.185 0.815 38 H 0.414 0.586 39 H 0.088 0.912 40 H 0.105 0.895 41 H 0.135 0.865 42 H 0.493 0.507 43 H 0.134 0.866 44 H 0.151 0.849 45 H 0.147 0.853 46 H 0.101 0.899 47 H 0.062 0.938 48 H 0.083 0.917 49 H 0.081 0.919 50 H 0.091 0.909 51 H 0.062 0.938 52 H 0.073 0.927 53 H 0.107 0.893 54 H 0.099 0.901 55 H 0.081 0.919 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 1.905 0.313 -3.569 4.058 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 O -0.369 6.369 2 C -0.164 4.164 3 Si 0.694 3.306 4 C -0.090 4.090 5 C -0.189 4.189 6 C -0.264 4.264 7 C 0.384 3.616 8 O -0.470 6.470 9 N -0.348 5.348 10 C 0.012 3.988 11 H 0.105 0.895 12 C -0.161 4.161 13 C -0.084 4.084 14 H 0.128 0.872 15 C -0.072 4.072 16 C -0.100 4.100 17 C -0.040 4.040 18 C -0.071 4.071 19 N -0.152 5.152 20 N -0.054 5.054 21 N -0.054 5.054 22 N -0.166 5.166 23 C -0.111 4.111 24 C -0.137 4.137 25 C -0.114 4.114 26 C -0.181 4.181 27 C -0.020 4.020 28 C -0.090 4.090 29 C -0.162 4.162 30 C -0.172 4.172 31 C -0.008 4.008 32 N -0.105 5.105 33 H 0.251 0.749 34 H 0.119 0.881 35 H -0.206 1.206 36 H -0.237 1.237 37 H 0.202 0.798 38 H 0.251 0.749 39 H 0.106 0.894 40 H 0.124 0.876 41 H 0.153 0.847 42 H 0.352 0.648 43 H 0.152 0.848 44 H 0.168 0.832 45 H 0.164 0.836 46 H 0.119 0.881 47 H 0.081 0.919 48 H 0.102 0.898 49 H 0.099 0.901 50 H 0.110 0.890 51 H 0.081 0.919 52 H 0.091 0.909 53 H 0.125 0.875 54 H 0.117 0.883 55 H 0.099 0.901 Dipole moment (debyes) X Y Z Total from point charges 1.380 0.695 -3.003 3.378 hybrid contribution -0.742 0.645 -0.308 1.030 sum 0.639 1.340 -3.311 3.629 Atomic orbital electron populations 1.86495 1.18101 1.80742 1.51546 1.24664 0.84210 1.11418 0.96104 0.93655 0.90117 0.70526 0.76288 1.20041 0.95501 0.94797 0.98677 1.21938 0.98693 1.02684 0.95547 1.19956 0.98197 1.05871 1.02414 1.17475 0.81396 0.79694 0.83065 1.90732 1.79734 1.38850 1.37638 1.45319 1.19828 1.38239 1.31444 1.21860 0.87371 0.99306 0.90305 0.89545 1.23383 0.95927 0.93918 1.02838 1.21593 0.93837 0.94918 0.98074 0.87232 1.19723 0.97415 0.93894 0.96162 1.21144 0.95186 0.94188 0.99464 1.17381 0.99660 0.88470 0.98441 1.24026 0.92498 0.97920 0.92639 1.74893 1.21889 0.97482 1.20888 1.47814 1.24995 1.15827 1.16748 1.78880 1.00353 1.14600 1.11585 1.76061 1.22772 1.00428 1.17299 1.21303 0.99147 0.96201 0.94491 1.21356 0.97514 0.94078 1.00768 1.21479 0.94721 1.00596 0.94590 1.23604 0.99858 0.96360 0.98278 1.20604 0.91922 0.98579 0.90904 1.20432 0.96739 0.94703 0.97152 1.21699 0.94636 1.03296 0.96601 1.21945 1.04631 0.95351 0.95227 1.22137 0.82101 0.95003 1.01541 1.44028 1.17822 1.27370 1.21233 0.74897 0.88128 1.20566 1.23676 0.79824 0.74928 0.89357 0.87644 0.84742 0.64776 0.84762 0.83159 0.83562 0.88072 0.91907 0.89830 0.90091 0.89001 0.91923 0.90874 0.87485 0.88264 0.90101 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 O -0.56 1.03 10.65 -148.98 -1.59 -0.56 16 2 C -0.06 0.15 2.98 71.24 0.21 0.37 16 3 Si 0.79 -2.95 31.10 68.60 2.13 -0.81 16 4 C 0.02 0.05 6.19 40.99 0.25 0.30 16 5 C -0.17 -0.25 9.08 23.64 0.21 -0.04 16 6 C -0.25 -1.84 6.28 -19.12 -0.12 -1.96 16 7 C 0.59 5.13 7.81 86.62 0.68 5.81 16 8 O -0.59 -9.19 14.93 -4.11 -0.06 -9.25 16 9 N -0.70 -0.83 5.26 -443.17 -2.33 -3.16 16 10 C 0.12 -0.02 4.33 45.58 0.20 0.18 16 11 H 0.09 0.35 7.46 -2.39 -0.02 0.33 16 12 C -0.12 0.59 7.29 31.12 0.23 0.82 16 13 C -0.07 0.26 3.85 -11.01 -0.04 0.22 16 14 H 0.11 -0.60 8.08 -2.39 -0.02 -0.62 16 15 C -0.07 0.10 5.28 -19.90 -0.11 -0.01 16 16 C -0.08 -0.14 9.36 22.48 0.21 0.07 16 17 C -0.04 -0.14 5.88 -20.04 -0.12 -0.26 16 18 C 0.21 1.33 7.94 137.38 1.09 2.42 16 19 N -0.30 -1.12 12.08 -52.13 -0.63 -1.75 16 20 N -0.20 0.11 7.90 37.02 0.29 0.40 16 21 N -0.06 -0.31 13.47 37.02 0.50 0.19 16 22 N -0.29 -2.42 12.23 -52.18 -0.64 -3.06 16 23 C -0.09 -0.10 9.70 22.47 0.22 0.12 16 24 C -0.12 0.25 10.03 22.24 0.22 0.47 16 25 C -0.10 0.26 8.53 22.30 0.19 0.45 16 26 C -0.14 0.22 7.27 31.18 0.23 0.44 16 27 C 0.10 0.74 6.57 41.69 0.27 1.02 16 28 C -0.05 -0.30 5.32 30.07 0.16 -0.14 16 29 C -0.12 -0.06 5.98 30.78 0.18 0.13 16 30 C -0.13 0.28 5.92 30.69 0.18 0.46 16 31 C 0.11 0.04 5.32 86.32 0.46 0.50 16 32 N -0.43 -2.02 3.11 -493.61 -1.54 -3.56 16 33 H 0.40 -3.89 8.74 -74.05 -0.65 -4.54 16 34 H 0.10 -0.70 7.96 -2.38 -0.02 -0.72 16 35 H -0.28 0.11 7.11 99.48 0.71 0.82 16 36 H -0.31 -1.86 7.11 99.48 0.71 -1.15 16 37 H 0.18 -1.22 6.51 -2.91 -0.02 -1.24 16 38 H 0.41 -1.83 7.83 -92.71 -0.73 -2.55 16 39 H 0.09 -0.54 8.14 -2.39 -0.02 -0.56 16 40 H 0.11 -0.63 7.63 -2.39 -0.02 -0.64 16 41 H 0.13 0.17 7.88 -2.91 -0.02 0.15 16 42 H 0.49 -4.99 8.96 -347.54 -3.12 -8.11 16 43 H 0.13 -0.03 7.88 -2.91 -0.02 -0.05 16 44 H 0.15 -0.97 8.06 -2.91 -0.02 -1.00 16 45 H 0.15 -0.94 6.71 -2.91 -0.02 -0.96 16 46 H 0.10 -0.31 6.39 -2.39 -0.02 -0.32 16 47 H 0.06 0.09 8.14 -2.39 -0.02 0.07 16 48 H 0.08 0.50 8.14 -2.39 -0.02 0.48 16 49 H 0.08 0.75 7.40 -2.39 -0.02 0.73 16 50 H 0.09 -0.20 8.14 -2.39 -0.02 -0.22 16 51 H 0.06 0.11 8.12 -2.39 -0.02 0.09 16 52 H 0.07 -0.10 8.11 -2.39 -0.02 -0.12 16 53 H 0.11 -0.63 8.14 -2.39 -0.02 -0.65 16 54 H 0.10 -0.15 7.69 -2.39 -0.02 -0.16 16 55 H 0.08 0.11 8.00 -2.39 -0.02 0.09 16 Total: 0.00 -28.51 445.99 -2.51 -31.02 By element: Atomic # 1 Polarization: -17.39 SS G_CDS: -3.46 Total: -20.85 kcal Atomic # 6 Polarization: 6.55 SS G_CDS: 4.81 Total: 11.37 kcal Atomic # 7 Polarization: -6.58 SS G_CDS: -4.34 Total: -10.92 kcal Atomic # 8 Polarization: -8.16 SS G_CDS: -1.65 Total: -9.80 kcal Atomic # 14 Polarization: -2.95 SS G_CDS: 2.13 Total: -0.81 kcal Total: -28.51 -2.51 -31.02 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. m_280130_17857610_17964112.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 183.404 kcal (2) G-P(sol) polarization free energy of solvation -28.510 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 154.893 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -2.507 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -31.017 kcal (6) G-S(sol) free energy of system = (1) + (5) 152.387 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.89 seconds