Wall clock time and date at job start Wed Apr 1 2020 02:13:13 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 1.50702 * 1 3 3 C 1.38257 * 119.99922 * 2 1 4 4 C 1.38208 * 119.99899 * 180.25687 * 3 2 1 5 5 C 1.38264 * 120.00072 * 359.78599 * 4 3 2 6 6 C 1.38207 * 119.99884 * 359.95787 * 5 4 3 7 7 C 1.38210 * 120.00205 * 179.76652 * 2 1 3 8 8 C 1.50700 * 120.00079 * 359.97438 * 7 2 1 9 9 H 1.09006 * 115.54839 * 334.06034 * 8 7 2 10 10 C 1.53070 * 117.51868 * 188.33588 * 8 7 2 11 11 C 1.53002 * 59.98708 * 252.52051 * 10 8 7 12 12 H 1.09004 * 117.49995 * 107.49400 * 11 10 8 13 13 C 1.50693 * 117.49973 * 252.49878 * 11 10 8 14 14 O 1.21276 * 120.00167 * 68.73888 * 13 11 10 15 15 N 1.34783 * 119.99815 * 248.74738 * 13 11 10 16 16 C 1.46499 * 119.99796 * 180.02562 * 15 13 11 17 17 C 1.53004 * 109.46720 * 179.97438 * 16 15 13 18 18 H 1.09002 * 110.88605 * 54.29804 * 17 16 15 19 19 C 1.54909 * 111.00603 * 290.41419 * 17 16 15 20 20 N 1.47523 * 104.78433 * 204.90137 * 19 17 16 21 21 C 1.36938 * 125.63741 * 204.08423 * 20 19 17 22 22 H 1.07999 * 120.00108 * 0.02562 * 21 20 19 23 23 C 1.38816 * 119.99955 * 180.02562 * 21 20 19 24 24 N 1.31614 * 120.00062 * 0.02562 * 23 21 20 25 25 Si 1.86797 * 119.99717 * 179.97438 * 23 21 20 26 26 H 1.48491 * 109.47580 * 0.02562 * 25 23 21 27 27 H 1.48509 * 109.47038 * 120.00304 * 25 23 21 28 28 H 1.48498 * 109.47218 * 240.00183 * 25 23 21 29 29 C 1.47022 * 108.71559 * 24.12363 * 20 19 17 30 30 C 1.54330 * 107.27093 * 358.93837 * 29 20 19 31 31 H 1.09005 * 110.71759 * 96.17175 * 30 29 20 32 32 C 1.52995 * 110.87339 * 219.37409 * 30 29 20 33 33 H 1.09002 * 109.46914 * 270.23108 * 1 2 3 34 34 H 1.08992 * 109.47108 * 30.23268 * 1 2 3 35 35 H 1.08998 * 109.46931 * 150.23737 * 1 2 3 36 36 H 1.08001 * 119.99727 * 0.02562 * 3 2 1 37 37 H 1.07998 * 120.00257 * 179.76622 * 4 3 2 38 38 H 1.07999 * 120.00004 * 179.97438 * 5 4 3 39 39 H 1.08002 * 119.99782 * 180.02562 * 6 5 4 40 40 H 1.09002 * 117.52004 * 145.04662 * 10 8 7 41 41 H 1.09005 * 117.49301 * 0.02562 * 10 8 7 42 42 H 0.97004 * 119.99768 * 359.97438 * 15 13 11 43 43 H 1.08999 * 109.47264 * 59.99685 * 16 15 13 44 44 H 1.08995 * 109.46921 * 299.99386 * 16 15 13 45 45 H 1.09001 * 110.36668 * 323.71926 * 19 17 16 46 46 H 1.09004 * 110.36307 * 86.04054 * 19 17 16 47 47 H 0.97002 * 120.00021 * 180.02562 * 24 23 21 48 48 H 1.08998 * 109.88478 * 239.52488 * 29 20 19 49 49 H 1.08997 * 110.01216 * 118.42984 * 29 20 19 50 50 H 1.08999 * 109.47219 * 173.61174 * 32 30 29 51 51 H 1.08997 * 109.47117 * 293.61185 * 32 30 29 52 52 H 1.08993 * 109.47355 * 53.61118 * 32 30 29 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 1.5070 0.0000 0.0000 3 6 2.1983 1.1973 0.0000 4 6 3.5804 1.1973 -0.0054 5 6 4.2717 0.0000 -0.0063 6 6 3.5807 -1.1969 -0.0009 7 6 2.1981 -1.1969 0.0049 8 6 1.4447 -2.5020 0.0108 9 1 0.4439 -2.4652 0.4412 10 6 2.2544 -3.7852 0.2128 11 6 1.6737 -3.4554 -1.1638 12 1 2.3695 -3.1386 -1.9408 13 6 0.4986 -4.2715 -1.6370 14 8 -0.5783 -4.1571 -1.0911 15 7 0.6444 -5.1287 -2.6668 16 6 -0.4981 -5.9217 -3.1272 17 6 -0.0663 -6.8058 -4.2989 18 1 0.7986 -7.4122 -4.0299 19 6 0.2233 -5.9541 -5.5600 20 7 0.0184 -6.8768 -6.6926 21 6 0.5788 -6.7509 -7.9357 22 1 1.2342 -5.9200 -8.1510 23 6 0.3043 -7.6913 -8.9193 24 7 -0.4948 -8.7037 -8.6571 25 14 1.0681 -7.5191 -10.6152 26 1 1.9211 -6.3042 -10.6530 27 1 1.8980 -8.7153 -10.9082 28 1 -0.0071 -7.4013 -11.6327 29 6 -0.8875 -7.9534 -6.2662 30 6 -1.2400 -7.6961 -4.7858 31 1 -2.1879 -7.1645 -4.7019 32 6 -1.2861 -9.0083 -4.0005 33 1 -0.3633 0.0041 1.0277 34 1 -0.3633 0.8878 -0.5174 35 1 -0.3633 -0.8921 -0.5101 36 1 1.6582 2.1326 0.0004 37 1 4.1204 2.1326 -0.0092 38 1 5.3517 0.0000 -0.0109 39 1 4.1207 -2.1322 -0.0012 40 1 1.7865 -4.5926 0.7761 41 1 3.3322 -3.6851 0.3418 42 1 1.5057 -5.2200 -3.1036 43 1 -1.2967 -5.2543 -3.4511 44 1 -0.8573 -6.5489 -2.3114 45 1 -0.4732 -5.1178 -5.6211 46 1 1.2514 -5.5923 -5.5455 47 1 -0.6863 -9.3610 -9.3443 48 1 -0.3900 -8.9180 -6.3664 49 1 -1.7941 -7.9394 -6.8710 50 1 -1.4238 -8.7929 -2.9409 51 1 -2.1165 -9.6169 -4.3584 52 1 -0.3510 -9.5499 -4.1425 RHF calculation, no. of doubly occupied orbitals= 65 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 ZINC001093044675.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 02:13:13 Heat of formation + Delta-G solvation = 22.813061 kcal Electronic energy + Delta-G solvation = -29068.041134 eV Core-core repulsion = 25226.065565 eV Total energy + Delta-G solvation = -3841.975569 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.42 seconds Orbital eigenvalues (eV) -40.54468 -39.45076 -38.09327 -36.51792 -34.62186 -33.10477 -32.92972 -30.91492 -30.73302 -29.38644 -27.16484 -26.15984 -25.46293 -24.32649 -23.96037 -22.47530 -21.68838 -20.67896 -20.18871 -19.93299 -19.15435 -17.66415 -16.88151 -16.66941 -15.99151 -15.65179 -15.31300 -15.11722 -14.83146 -14.48319 -14.32420 -14.05491 -13.78281 -13.72696 -13.35507 -13.18233 -12.95509 -12.69526 -12.53797 -12.50066 -12.41345 -12.19404 -11.83492 -11.70144 -11.44592 -11.39810 -11.21744 -11.18343 -10.92866 -10.82295 -10.77941 -10.69192 -10.20074 -10.02056 -9.98108 -9.90845 -9.69035 -9.55061 -9.03972 -8.95646 -8.72501 -8.61447 -6.83889 -5.72158 -3.05631 1.01220 1.11403 2.46932 3.11849 3.38606 3.38677 3.44196 3.46642 3.80459 4.28101 4.45412 4.48217 4.55757 4.64482 4.65501 4.76034 4.88331 4.96582 5.06793 5.11345 5.21935 5.26461 5.31734 5.37000 5.41849 5.43710 5.52177 5.55754 5.61374 5.64815 5.75656 5.78477 5.82389 5.86958 5.95861 6.01934 6.10018 6.17983 6.23635 6.24336 6.27771 6.41063 6.46114 6.48222 6.56298 6.61993 6.73404 6.75660 6.93840 7.55301 7.56463 7.63616 7.83342 8.24135 8.25135 9.21319 9.81544 10.47750 11.39502 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.013618 B = 0.002102 C = 0.001923 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2055.607274 B =13316.005556 C =14558.736493 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.122 4.122 2 C -0.073 4.073 3 C -0.120 4.120 4 C -0.120 4.120 5 C -0.124 4.124 6 C -0.116 4.116 7 C -0.054 4.054 8 C -0.084 4.084 9 H 0.129 0.871 10 C -0.145 4.145 11 C -0.176 4.176 12 H 0.125 0.875 13 C 0.541 3.459 14 O -0.546 6.546 15 N -0.719 5.719 16 C 0.133 3.867 17 C -0.113 4.113 18 H 0.080 0.920 19 C 0.142 3.858 20 N -0.607 5.607 21 C -0.227 4.227 22 H 0.078 0.922 23 C -0.009 4.009 24 N -0.921 5.921 25 Si 0.911 3.089 26 H -0.280 1.280 27 H -0.291 1.291 28 H -0.291 1.291 29 C 0.184 3.816 30 C -0.111 4.111 31 H 0.067 0.933 32 C -0.134 4.134 33 H 0.071 0.929 34 H 0.066 0.934 35 H 0.075 0.925 36 H 0.122 0.878 37 H 0.120 0.880 38 H 0.121 0.879 39 H 0.124 0.876 40 H 0.105 0.895 41 H 0.108 0.892 42 H 0.403 0.597 43 H 0.068 0.932 44 H 0.065 0.935 45 H 0.019 0.981 46 H 0.035 0.965 47 H 0.251 0.749 48 H 0.049 0.951 49 H 0.041 0.959 50 H 0.044 0.956 51 H 0.053 0.947 52 H 0.054 0.946 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 6.675 13.897 20.871 25.947 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 -0.178 4.178 2 C -0.073 4.073 3 C -0.138 4.138 4 C -0.138 4.138 5 C -0.142 4.142 6 C -0.134 4.134 7 C -0.054 4.054 8 C -0.103 4.103 9 H 0.146 0.854 10 C -0.182 4.182 11 C -0.198 4.198 12 H 0.143 0.857 13 C 0.327 3.673 14 O -0.424 6.424 15 N -0.369 5.369 16 C 0.009 3.991 17 C -0.132 4.132 18 H 0.098 0.902 19 C 0.015 3.985 20 N -0.333 5.333 21 C -0.356 4.356 22 H 0.095 0.905 23 C -0.205 4.205 24 N -0.569 5.569 25 Si 0.742 3.258 26 H -0.205 1.205 27 H -0.218 1.218 28 H -0.218 1.218 29 C 0.059 3.941 30 C -0.131 4.131 31 H 0.085 0.915 32 C -0.192 4.192 33 H 0.089 0.911 34 H 0.085 0.915 35 H 0.094 0.906 36 H 0.140 0.860 37 H 0.138 0.862 38 H 0.139 0.861 39 H 0.142 0.858 40 H 0.123 0.877 41 H 0.126 0.874 42 H 0.237 0.763 43 H 0.086 0.914 44 H 0.083 0.917 45 H 0.037 0.963 46 H 0.054 0.946 47 H 0.062 0.938 48 H 0.067 0.933 49 H 0.060 0.940 50 H 0.063 0.937 51 H 0.072 0.928 52 H 0.073 0.927 Dipole moment (debyes) X Y Z Total from point charges 5.878 13.843 21.017 25.843 hybrid contribution 0.880 0.017 -1.340 1.603 sum 6.758 13.860 19.677 24.999 Atomic orbital electron populations 1.20883 0.90986 1.03442 1.02507 1.19766 0.96279 0.92328 0.98916 1.21038 0.94286 0.97419 1.01052 1.21140 0.94318 0.98087 1.00304 1.21098 0.99835 0.92435 1.00879 1.21059 0.93524 0.98371 1.00422 1.18991 0.93003 0.92725 1.00682 1.21088 1.00853 0.87826 1.00509 0.85365 1.23141 1.00297 0.98837 0.95943 1.22370 1.00350 1.03298 0.93740 0.85681 1.19553 0.88578 0.79455 0.79729 1.90683 1.27739 1.66999 1.56943 1.45999 1.14628 1.42055 1.34209 1.21407 0.88104 0.93326 0.96227 1.22674 0.99448 0.97097 0.94021 0.90158 1.21592 0.97711 0.92464 0.86690 1.44497 1.54539 1.25897 1.08353 1.19096 1.22376 1.07739 0.86370 0.90459 1.24807 0.99975 0.97379 0.98381 1.69972 1.39679 1.14480 1.32750 0.86051 0.78334 0.77240 0.84182 1.20531 1.21775 1.21759 1.21210 0.94027 0.92029 0.86814 1.22443 0.96753 0.95080 0.98778 0.91455 1.21688 1.01856 0.97131 0.98484 0.91059 0.91538 0.90571 0.86032 0.86162 0.86084 0.85816 0.87699 0.87435 0.76280 0.91418 0.91670 0.96342 0.94635 0.93810 0.93324 0.94046 0.93670 0.92760 0.92713 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -0.12 -1.04 9.33 36.01 0.34 -0.71 16 2 C -0.07 -0.69 5.88 -104.62 -0.62 -1.31 16 3 C -0.12 -1.02 9.70 -39.59 -0.38 -1.40 16 4 C -0.12 -0.95 10.05 -39.58 -0.40 -1.35 16 5 C -0.12 -0.98 10.05 -39.58 -0.40 -1.38 16 6 C -0.12 -0.98 9.30 -39.59 -0.37 -1.35 16 7 C -0.05 -0.52 5.61 -104.63 -0.59 -1.10 16 8 C -0.08 -0.82 4.66 -91.73 -0.43 -1.25 16 9 H 0.13 1.40 6.44 -51.93 -0.33 1.07 16 10 C -0.14 -1.19 9.57 -26.69 -0.26 -1.45 16 11 C -0.18 -1.76 5.82 -91.77 -0.53 -2.29 16 12 H 0.13 1.10 8.14 -51.93 -0.42 0.68 16 13 C 0.54 7.10 7.61 -10.99 -0.08 7.02 16 14 O -0.55 -9.01 16.26 5.56 0.09 -8.92 16 15 N -0.72 -9.05 5.45 -60.30 -0.33 -9.38 16 16 C 0.13 1.91 5.12 -4.04 -0.02 1.89 16 17 C -0.11 -1.84 2.51 -88.47 -0.22 -2.07 16 18 H 0.08 1.30 8.05 -51.93 -0.42 0.88 16 19 C 0.14 2.82 6.56 -2.47 -0.02 2.80 16 20 N -0.61 -15.29 3.40 -169.99 -0.58 -15.87 16 21 C -0.23 -6.30 10.28 -15.06 -0.15 -6.46 16 22 H 0.08 2.07 7.83 -52.49 -0.41 1.66 16 23 C -0.01 -0.26 5.49 -17.43 -0.10 -0.36 16 24 N -0.92 -26.97 10.31 55.49 0.57 -26.40 16 25 Si 0.91 22.04 29.55 -169.99 -5.02 17.02 16 26 H -0.28 -6.56 7.11 56.52 0.40 -6.16 16 27 H -0.29 -7.06 7.11 56.52 0.40 -6.66 16 28 H -0.29 -7.10 7.11 56.52 0.40 -6.69 16 29 C 0.18 4.39 4.97 -3.06 -0.02 4.37 16 30 C -0.11 -2.00 3.01 -88.78 -0.27 -2.26 16 31 H 0.07 1.19 8.04 -51.93 -0.42 0.77 16 32 C -0.13 -2.07 9.17 37.15 0.34 -1.73 16 33 H 0.07 0.54 8.14 -51.93 -0.42 0.12 16 34 H 0.07 0.50 8.09 -51.93 -0.42 0.08 16 35 H 0.08 0.76 6.65 -51.93 -0.35 0.41 16 36 H 0.12 0.81 8.06 -52.49 -0.42 0.39 16 37 H 0.12 0.70 8.06 -52.49 -0.42 0.27 16 38 H 0.12 0.71 8.06 -52.49 -0.42 0.29 16 39 H 0.12 0.83 6.02 -52.49 -0.32 0.52 16 40 H 0.10 0.88 8.14 -51.93 -0.42 0.46 16 41 H 0.11 0.68 6.18 -51.93 -0.32 0.36 16 42 H 0.40 4.36 8.43 -40.82 -0.34 4.02 16 43 H 0.07 1.06 8.03 -51.93 -0.42 0.64 16 44 H 0.07 0.93 8.14 -51.93 -0.42 0.51 16 45 H 0.02 0.38 7.96 -51.93 -0.41 -0.03 16 46 H 0.04 0.67 8.14 -51.93 -0.42 0.25 16 47 H 0.25 7.15 8.31 -40.82 -0.34 6.81 16 48 H 0.05 1.28 7.02 -51.93 -0.36 0.92 16 49 H 0.04 1.11 7.50 -51.93 -0.39 0.72 16 50 H 0.04 0.60 8.14 -51.93 -0.42 0.18 16 51 H 0.05 0.82 8.14 -51.93 -0.42 0.39 16 52 H 0.05 0.87 8.07 -51.93 -0.42 0.45 16 LS Contribution 414.76 15.07 6.25 6.25 Total: -1.00 -32.50 414.76 -11.88 -44.38 By element: Atomic # 1 Polarization: 11.99 SS G_CDS: -8.69 Total: 3.29 kcal Atomic # 6 Polarization: -6.21 SS G_CDS: -4.17 Total: -10.38 kcal Atomic # 7 Polarization: -51.31 SS G_CDS: -0.33 Total: -51.64 kcal Atomic # 8 Polarization: -9.01 SS G_CDS: 0.09 Total: -8.92 kcal Atomic # 14 Polarization: 22.04 SS G_CDS: -5.02 Total: 17.02 kcal Total LS contribution 6.25 Total: 6.25 kcal Total: -32.50 -11.88 -44.38 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. ZINC001093044675.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 67.191 kcal (2) G-P(sol) polarization free energy of solvation -32.502 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 34.689 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.875 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.378 kcal (6) G-S(sol) free energy of system = (1) + (5) 22.813 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.42 seconds