Wall clock time and date at job start Wed Apr 1 2020 04:54:54 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 1.50701 * 1 3 3 C 1.34673 * 126.58896 * 2 1 4 4 N 1.34123 * 108.02366 * 179.97438 * 3 2 1 5 5 C 1.30500 * 109.25555 * 0.02562 * 4 3 2 6 6 N 1.35046 * 108.69814 * 359.76625 * 5 4 3 7 7 C 1.46503 * 126.39683 * 180.26922 * 6 5 4 8 8 C 1.50703 * 109.47110 * 265.11654 * 7 6 5 9 9 O 1.21282 * 119.99607 * 0.02562 * 8 7 6 10 10 N 1.34774 * 119.99781 * 180.02562 * 8 7 6 11 11 C 1.46926 * 120.63108 * 354.87484 * 10 8 7 12 12 C 1.53191 * 108.77359 * 126.36894 * 11 10 8 13 13 C 1.53043 * 109.31570 * 54.63353 * 12 11 10 14 14 C 1.53039 * 109.53654 * 298.63626 * 13 12 11 15 15 C 1.46931 * 120.62764 * 174.59333 * 10 8 7 16 16 H 1.09000 * 109.58131 * 113.84208 * 15 10 8 17 17 C 1.53001 * 109.58749 * 353.42114 * 15 10 8 18 18 H 1.09006 * 109.87101 * 320.58984 * 17 15 10 19 19 C 1.54322 * 109.88231 * 81.59995 * 17 15 10 20 20 C 1.55154 * 102.93830 * 141.61155 * 19 17 15 21 21 C 1.54909 * 101.58623 * 324.49757 * 20 19 17 22 22 N 1.47016 * 109.88090 * 199.57369 * 17 15 10 23 23 C 1.36930 * 125.65141 * 61.60640 * 22 17 15 24 24 H 1.08005 * 120.00483 * 18.72477 * 23 22 17 25 25 C 1.38817 * 120.00300 * 198.72611 * 23 22 17 26 26 N 1.31621 * 119.99615 * 359.97438 * 25 23 22 27 27 Si 1.86796 * 120.00212 * 179.97438 * 25 23 22 28 28 H 1.48503 * 109.47243 * 59.99821 * 27 25 23 29 29 H 1.48499 * 109.47158 * 179.97438 * 27 25 23 30 30 H 1.48499 * 109.47284 * 299.99915 * 27 25 23 31 31 H 1.09002 * 109.46806 * 90.02690 * 1 2 3 32 32 H 1.08991 * 109.47429 * 330.02469 * 1 2 3 33 33 H 1.08998 * 109.46532 * 210.02411 * 1 2 3 34 34 H 1.08005 * 125.98771 * 359.96002 * 3 2 1 35 35 H 1.08003 * 125.65269 * 180.02562 * 5 4 3 36 36 H 1.08999 * 109.46989 * 25.11608 * 7 6 5 37 37 H 1.08999 * 109.46608 * 145.11623 * 7 6 5 38 38 H 1.09004 * 109.58468 * 246.15347 * 11 10 8 39 39 H 1.08999 * 109.58907 * 6.57957 * 11 10 8 40 40 H 1.09001 * 109.49628 * 174.58611 * 12 11 10 41 41 H 1.08995 * 109.49957 * 294.64680 * 12 11 10 42 42 H 1.09005 * 109.45985 * 58.65447 * 13 12 11 43 43 H 1.08993 * 109.46338 * 178.61042 * 13 12 11 44 44 H 1.08998 * 109.50017 * 181.31225 * 14 13 12 45 45 H 1.08995 * 109.49805 * 301.37710 * 14 13 12 46 46 H 1.08994 * 110.72190 * 259.97327 * 19 17 15 47 47 H 1.08994 * 110.72219 * 23.07437 * 19 17 15 48 48 H 1.08999 * 111.00500 * 82.57437 * 20 19 17 49 49 H 1.09009 * 111.00645 * 206.38857 * 20 19 17 50 50 H 1.08994 * 110.37092 * 155.84355 * 21 20 19 51 51 H 1.08999 * 110.36974 * 278.17571 * 21 20 19 52 52 H 0.96994 * 119.99821 * 180.02562 * 26 25 23 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 2.3098 1.0813 0.0000 4 7 3.5812 0.6543 0.0006 5 6 3.5969 -0.6506 0.0004 6 7 2.3230 -1.0989 0.0049 7 6 1.8945 -2.4999 0.0118 8 6 1.6291 -2.9510 -1.4014 9 8 1.7832 -2.1784 -2.3235 10 7 1.2204 -4.2128 -1.6404 11 6 1.1368 -5.1921 -0.5483 12 6 -0.2704 -5.7976 -0.5358 13 6 -0.5875 -6.3702 -1.9191 14 6 -0.5542 -5.2468 -2.9579 15 6 0.8443 -4.6336 -2.9970 16 1 1.5557 -5.3755 -3.3598 17 6 0.8444 -3.4201 -3.9289 18 1 0.4332 -2.5543 -3.4098 19 6 2.2836 -3.1172 -4.3961 20 6 2.0875 -2.7008 -5.8778 21 6 0.9261 -3.6299 -6.3110 22 7 0.0447 -3.7105 -5.1279 23 6 -1.2920 -4.0073 -5.1431 24 1 -1.9110 -3.7548 -4.2948 25 6 -1.8516 -4.6327 -6.2488 26 7 -1.0974 -4.9400 -7.2829 27 14 -3.6749 -5.0382 -6.2693 28 1 -4.4620 -3.7868 -6.1284 29 1 -4.0209 -5.6980 -7.5539 30 1 -3.9916 -5.9516 -5.1421 31 1 -0.3633 -0.0005 -1.0277 32 1 -0.3634 0.8901 0.5134 33 1 -0.3632 -0.8898 0.5142 34 1 1.9864 2.1118 -0.0006 35 1 4.4820 -1.2695 0.0011 36 1 2.6789 -3.1176 0.4491 37 1 0.9833 -2.5981 0.6018 38 1 1.8724 -5.9806 -0.7074 39 1 1.3297 -4.6961 0.4029 40 1 -0.3172 -6.5939 0.2071 41 1 -0.9969 -5.0243 -0.2863 42 1 0.1540 -7.1261 -2.1779 43 1 -1.5785 -6.8235 -1.9061 44 1 -0.8030 -5.6511 -3.9391 45 1 -1.2785 -4.4789 -2.6866 46 1 2.7122 -2.2981 -3.8188 47 1 2.9084 -4.0073 -4.3224 48 1 1.7985 -1.6526 -5.9541 49 1 2.9862 -2.8996 -6.4619 50 1 0.3881 -3.1968 -7.1542 51 1 1.3069 -4.6178 -6.5698 52 1 -1.4885 -5.3767 -8.0556 RHF calculation, no. of doubly occupied orbitals= 66 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 ZINC001025253658.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 04:54:54 Heat of formation + Delta-G solvation = 91.164723 kcal Electronic energy + Delta-G solvation = -33338.784516 eV Core-core repulsion = 29341.609597 eV Total energy + Delta-G solvation = -3997.174919 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 346.211 amu Computer time = 1.00 seconds Orbital eigenvalues (eV) -42.13063 -40.46797 -37.44807 -36.81194 -34.09992 -32.84278 -32.38285 -31.91198 -31.40859 -29.15387 -28.01076 -26.91549 -26.39435 -24.65832 -24.52417 -22.55236 -21.47453 -21.27727 -20.18306 -19.61725 -19.41716 -19.01493 -17.42791 -17.09736 -16.31761 -15.75744 -15.44303 -15.27843 -14.56393 -14.50436 -14.35492 -13.99905 -13.92668 -13.84229 -13.54813 -13.22084 -13.03512 -12.94978 -12.80739 -12.58706 -12.50034 -12.32470 -12.23755 -11.93519 -11.68870 -11.42160 -11.07383 -10.94088 -10.88413 -10.73346 -10.62301 -10.19820 -10.17505 -10.04350 -9.91735 -9.77486 -9.64457 -9.45207 -9.31731 -8.75164 -8.40023 -8.23252 -8.21441 -6.62200 -5.74998 -3.08544 1.99411 2.60650 2.61989 3.17889 3.27421 3.35832 3.41754 3.42576 4.35109 4.46945 4.48507 4.65139 4.71514 4.73814 4.79422 4.93890 5.10446 5.11188 5.34212 5.42780 5.43749 5.50974 5.54624 5.56290 5.68179 5.76393 5.78414 5.86794 5.87887 5.96261 6.07782 6.08631 6.16310 6.23520 6.30140 6.38560 6.48000 6.60576 6.62047 6.76149 6.80003 6.90135 6.95836 7.08842 7.16829 7.35315 7.48808 7.56106 7.59292 7.71658 7.82263 8.12325 8.26859 8.42858 9.20950 9.82850 10.57360 11.37158 Molecular weight = 346.21amu Principal moments of inertia in cm(-1) A = 0.012364 B = 0.003988 C = 0.003631 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2264.060518 B = 7018.911430 C = 7708.580312 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.078 4.078 2 C -0.008 4.008 3 C -0.034 4.034 4 N -0.493 5.493 5 C 0.186 3.814 6 N -0.439 5.439 7 C 0.083 3.917 8 C 0.480 3.520 9 O -0.489 6.489 10 N -0.600 5.600 11 C 0.106 3.894 12 C -0.133 4.133 13 C -0.126 4.126 14 C -0.122 4.122 15 C 0.139 3.861 16 H 0.058 0.942 17 C 0.167 3.833 18 H 0.065 0.935 19 C -0.112 4.112 20 C -0.151 4.151 21 C 0.175 3.825 22 N -0.596 5.596 23 C -0.220 4.220 24 H 0.073 0.927 25 C -0.003 4.003 26 N -0.912 5.912 27 Si 0.900 3.100 28 H -0.285 1.285 29 H -0.291 1.291 30 H -0.284 1.284 31 H 0.077 0.923 32 H 0.079 0.921 33 H 0.059 0.941 34 H 0.166 0.834 35 H 0.200 0.800 36 H 0.116 0.884 37 H 0.113 0.887 38 H 0.069 0.931 39 H 0.073 0.927 40 H 0.067 0.933 41 H 0.064 0.936 42 H 0.056 0.944 43 H 0.060 0.940 44 H 0.118 0.882 45 H 0.059 0.941 46 H 0.086 0.914 47 H 0.041 0.959 48 H 0.054 0.946 49 H 0.050 0.950 50 H 0.059 0.941 51 H 0.025 0.975 52 H 0.253 0.747 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 5.147 0.154 17.826 18.555 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 -0.136 4.136 2 C -0.122 4.122 3 C -0.181 4.181 4 N -0.210 5.210 5 C -0.096 4.096 6 N -0.123 5.123 7 C -0.044 4.044 8 C 0.266 3.734 9 O -0.364 6.364 10 N -0.335 5.335 11 C -0.018 4.018 12 C -0.172 4.172 13 C -0.163 4.163 14 C -0.160 4.160 15 C 0.036 3.964 16 H 0.076 0.924 17 C 0.060 3.940 18 H 0.082 0.918 19 C -0.150 4.150 20 C -0.190 4.190 21 C 0.050 3.950 22 N -0.321 5.321 23 C -0.349 4.349 24 H 0.090 0.910 25 C -0.201 4.201 26 N -0.558 5.558 27 Si 0.730 3.270 28 H -0.212 1.212 29 H -0.216 1.216 30 H -0.210 1.210 31 H 0.096 0.904 32 H 0.098 0.902 33 H 0.078 0.922 34 H 0.183 0.817 35 H 0.217 0.783 36 H 0.134 0.866 37 H 0.131 0.869 38 H 0.087 0.913 39 H 0.091 0.909 40 H 0.085 0.915 41 H 0.082 0.918 42 H 0.075 0.925 43 H 0.078 0.922 44 H 0.136 0.864 45 H 0.077 0.923 46 H 0.104 0.896 47 H 0.060 0.940 48 H 0.073 0.927 49 H 0.069 0.931 50 H 0.077 0.923 51 H 0.043 0.957 52 H 0.063 0.937 Dipole moment (debyes) X Y Z Total from point charges 5.733 0.856 17.136 18.090 hybrid contribution -1.668 -1.240 -0.010 2.079 sum 4.065 -0.384 17.126 17.606 Atomic orbital electron populations 1.20221 0.87445 1.02624 1.03272 1.21191 0.94464 0.86685 1.09884 1.21949 0.88411 0.98260 1.09460 1.70229 1.22465 1.08777 1.19557 1.24776 0.86903 0.91799 1.06133 1.44876 1.07363 1.05372 1.54657 1.21796 1.03715 0.81180 0.97732 1.20540 0.79451 0.83143 0.90285 1.90827 1.49036 1.53975 1.42553 1.48371 1.65385 1.09504 1.10258 1.21735 0.98087 0.92442 0.89514 1.21916 0.96223 1.00346 0.98672 1.21666 1.01226 0.99010 0.94426 1.22269 0.95733 0.96772 1.01186 1.22228 0.95877 0.99252 0.79064 0.92403 1.21517 0.91583 0.93164 0.87724 0.91790 1.22815 0.96234 1.00147 0.95795 1.23006 0.99377 1.00150 0.96421 1.21376 0.88200 0.94987 0.90418 1.44787 1.04956 1.82007 1.00341 1.18872 0.82807 1.30818 1.02412 0.90966 1.24938 0.97632 1.00057 0.97435 1.69935 1.33948 1.45630 1.06269 0.86386 0.85433 0.78256 0.76905 1.21182 1.21644 1.21021 0.90383 0.90176 0.92239 0.81690 0.78325 0.86584 0.86918 0.91292 0.90874 0.91462 0.91763 0.92520 0.92165 0.86386 0.92254 0.89583 0.94013 0.92714 0.93089 0.92306 0.95684 0.93669 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 -0.08 -0.81 10.18 36.01 0.37 -0.45 16 2 C -0.01 -0.10 6.95 -81.60 -0.57 -0.67 16 3 C -0.03 -0.47 11.79 -17.81 -0.21 -0.68 16 4 N -0.49 -7.42 11.25 -14.66 -0.16 -7.58 16 5 C 0.19 2.36 12.56 -90.37 -1.13 1.22 16 6 N -0.44 -5.30 2.24 -115.27 -0.26 -5.56 16 7 C 0.08 0.79 4.77 -5.19 -0.02 0.76 16 8 C 0.48 6.59 7.47 -10.99 -0.08 6.51 16 9 O -0.49 -8.72 9.30 5.56 0.05 -8.67 16 10 N -0.60 -8.07 2.98 -165.47 -0.49 -8.57 16 11 C 0.11 0.99 6.35 -3.71 -0.02 0.97 16 12 C -0.13 -1.36 6.08 -26.61 -0.16 -1.52 16 13 C -0.13 -1.72 5.89 -26.69 -0.16 -1.88 16 14 C -0.12 -2.20 3.74 -26.84 -0.10 -2.30 16 15 C 0.14 2.47 2.76 -67.82 -0.19 2.28 16 16 H 0.06 1.09 7.64 -51.93 -0.40 0.69 16 17 C 0.17 3.52 2.37 -66.96 -0.16 3.36 16 18 H 0.06 1.49 5.77 -52.04 -0.30 1.19 16 19 C -0.11 -2.25 5.56 -24.90 -0.14 -2.39 16 20 C -0.15 -3.17 7.08 -24.58 -0.17 -3.35 16 21 C 0.18 4.34 5.38 -2.35 -0.01 4.33 16 22 N -0.60 -14.73 3.03 -162.31 -0.49 -15.23 16 23 C -0.22 -5.74 6.59 -15.06 -0.10 -5.84 16 24 H 0.07 1.85 6.31 -52.48 -0.33 1.52 16 25 C 0.00 -0.08 5.46 -17.43 -0.10 -0.18 16 26 N -0.91 -26.00 10.77 55.49 0.60 -25.40 16 27 Si 0.90 21.24 29.55 -169.99 -5.02 16.21 16 28 H -0.29 -6.75 7.11 56.52 0.40 -6.35 16 29 H -0.29 -7.00 7.11 56.52 0.40 -6.60 16 30 H -0.28 -6.49 7.11 56.52 0.40 -6.09 16 31 H 0.08 0.95 8.14 -51.93 -0.42 0.53 16 32 H 0.08 0.67 8.14 -51.93 -0.42 0.24 16 33 H 0.06 0.54 7.33 -51.93 -0.38 0.16 16 34 H 0.17 1.92 8.06 -52.48 -0.42 1.50 16 35 H 0.20 1.84 8.06 -52.48 -0.42 1.42 16 36 H 0.12 0.73 7.72 -51.93 -0.40 0.33 16 37 H 0.11 0.86 7.11 -51.93 -0.37 0.49 16 38 H 0.07 0.61 8.14 -51.93 -0.42 0.19 16 39 H 0.07 0.45 5.93 -51.93 -0.31 0.14 16 40 H 0.07 0.54 8.14 -51.93 -0.42 0.12 16 41 H 0.06 0.68 8.14 -51.93 -0.42 0.26 16 42 H 0.06 0.76 8.14 -51.93 -0.42 0.34 16 43 H 0.06 0.82 8.14 -51.93 -0.42 0.40 16 44 H 0.12 2.64 5.83 -51.93 -0.30 2.33 16 45 H 0.06 1.15 6.83 -51.93 -0.35 0.79 16 46 H 0.09 1.76 5.58 -52.20 -0.29 1.47 16 47 H 0.04 0.81 7.53 -51.93 -0.39 0.42 16 48 H 0.05 1.17 8.14 -51.93 -0.42 0.75 16 49 H 0.05 0.97 8.14 -51.92 -0.42 0.54 16 50 H 0.06 1.61 7.23 -51.93 -0.38 1.24 16 51 H 0.03 0.67 7.98 -51.93 -0.41 0.25 16 52 H 0.25 7.09 8.31 -40.82 -0.34 6.75 16 LS Contribution 387.91 15.07 5.85 5.85 Total: -1.00 -32.46 387.91 -11.30 -43.76 By element: Atomic # 1 Polarization: 13.40 SS G_CDS: -8.40 Total: 5.00 kcal Atomic # 6 Polarization: 3.14 SS G_CDS: -2.96 Total: 0.18 kcal Atomic # 7 Polarization: -61.52 SS G_CDS: -0.81 Total: -62.33 kcal Atomic # 8 Polarization: -8.72 SS G_CDS: 0.05 Total: -8.67 kcal Atomic # 14 Polarization: 21.24 SS G_CDS: -5.02 Total: 16.21 kcal Total LS contribution 5.85 Total: 5.85 kcal Total: -32.46 -11.30 -43.76 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. ZINC001025253658.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 134.924 kcal (2) G-P(sol) polarization free energy of solvation -32.460 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 102.464 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.299 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.759 kcal (6) G-S(sol) free energy of system = (1) + (5) 91.165 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.01 seconds