Wall clock time and date at job start Tue Mar 31 2020 16:59:36 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 1.47206 * 1 3 3 C 1.17393 * 179.97438 * 2 1 4 4 C 1.47206 * 179.97438 * 179.97438 * 3 2 1 5 5 C 1.53002 * 109.47021 * 229.74200 * 4 3 2 6 6 C 1.52996 * 109.47346 * 180.02562 * 5 4 3 7 7 C 1.50699 * 109.47235 * 179.97438 * 6 5 4 8 8 O 1.21282 * 120.00041 * 359.97438 * 7 6 5 9 9 N 1.34779 * 120.00037 * 180.02562 * 7 6 5 10 10 C 1.46928 * 120.62686 * 359.97438 * 9 7 6 11 11 C 1.53194 * 108.77397 * 126.37421 * 10 9 7 12 12 C 1.53036 * 109.31439 * 54.63129 * 11 10 9 13 13 C 1.53037 * 109.54037 * 298.63678 * 12 11 10 14 14 H 1.09001 * 109.49698 * 301.41511 * 13 12 11 15 15 C 1.52995 * 109.50163 * 181.34937 * 13 12 11 16 16 H 1.09005 * 110.64095 * 303.14222 * 15 13 12 17 17 C 1.55157 * 110.72141 * 180.02562 * 15 13 12 18 18 C 1.54914 * 101.58080 * 206.13322 * 17 15 13 19 19 N 1.47432 * 104.83111 * 37.00823 * 18 17 15 20 20 C 1.36936 * 125.64675 * 155.90966 * 19 18 17 21 21 H 1.07999 * 119.99482 * 179.97438 * 20 19 18 22 22 C 1.38806 * 120.00506 * 359.97238 * 20 19 18 23 23 N 1.31625 * 119.99883 * 0.02562 * 22 20 19 24 24 Si 1.86792 * 120.00526 * 180.02562 * 22 20 19 25 25 H 1.48501 * 109.47152 * 89.99794 * 24 22 20 26 26 H 1.48500 * 109.47514 * 210.00262 * 24 22 20 27 27 H 1.48500 * 109.47119 * 329.99896 * 24 22 20 28 28 C 1.47019 * 108.70129 * 335.87054 * 19 18 17 29 29 C 1.46920 * 120.63111 * 179.72337 * 9 7 6 30 30 H 1.09001 * 109.47046 * 130.25833 * 1 2 3 31 31 H 1.08996 * 109.47366 * 250.26237 * 1 2 3 32 32 H 1.09000 * 109.47090 * 10.26048 * 1 2 3 33 33 H 1.08996 * 109.47170 * 349.73467 * 4 3 2 34 34 H 1.08992 * 109.47449 * 109.74243 * 4 3 2 35 35 H 1.09004 * 109.46733 * 300.00271 * 5 4 3 36 36 H 1.08996 * 109.47407 * 59.99588 * 5 4 3 37 37 H 1.09000 * 109.46870 * 299.99817 * 6 5 4 38 38 H 1.09004 * 109.47108 * 59.99711 * 6 5 4 39 39 H 1.09006 * 109.58715 * 246.15422 * 10 9 7 40 40 H 1.08999 * 109.59314 * 6.58291 * 10 9 7 41 41 H 1.09007 * 109.49848 * 174.58568 * 11 10 9 42 42 H 1.08998 * 109.49226 * 294.64648 * 11 10 9 43 43 H 1.09003 * 109.46266 * 58.65887 * 12 11 10 44 44 H 1.09001 * 109.46499 * 178.62659 * 12 11 10 45 45 H 1.08998 * 111.00394 * 324.20205 * 17 15 13 46 46 H 1.08996 * 111.00925 * 88.06127 * 17 15 13 47 47 H 1.08999 * 110.36993 * 155.84408 * 18 17 15 48 48 H 1.08999 * 110.36949 * 278.16737 * 18 17 15 49 49 H 0.97002 * 120.00398 * 180.02562 * 23 22 20 50 50 H 1.09003 * 109.88183 * 241.64086 * 28 19 18 51 51 H 1.09002 * 109.88098 * 120.47909 * 28 19 18 52 52 H 1.08996 * 109.58775 * 353.41368 * 29 9 7 53 53 H 1.09000 * 109.58740 * 113.84154 * 29 9 7 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 1.4721 0.0000 0.0000 3 6 2.6460 0.0005 0.0000 4 6 4.1180 0.0018 0.0000 5 6 4.6272 0.9345 1.1009 6 6 6.1572 0.9364 1.1005 7 6 6.6586 1.8555 2.1844 8 8 5.8699 2.4508 2.8876 9 7 7.9835 2.0168 2.3716 10 6 8.9512 1.3028 1.5274 11 6 9.9215 2.3211 0.9204 12 6 10.5552 3.1474 2.0419 13 6 9.4632 3.9103 2.7952 14 1 8.9253 4.5559 2.1008 15 6 10.1009 4.7620 3.8946 16 1 10.6893 4.1404 4.5696 17 6 9.0170 5.5486 4.6780 18 6 9.8265 6.7651 5.1926 19 7 10.7574 7.0899 4.0964 20 6 11.3318 8.3127 3.8732 21 1 12.0040 8.4493 3.0390 22 6 11.0502 9.3767 4.7190 23 7 10.2313 9.2101 5.7360 24 14 11.8332 11.0449 4.4142 25 1 10.9587 11.8464 3.5209 26 1 12.0043 11.7552 5.7070 27 1 13.1594 10.8594 3.7722 28 6 10.9674 5.8832 3.2832 29 6 8.4876 2.9140 3.4202 30 1 -0.3633 -0.6641 -0.7843 31 1 -0.3634 -0.3470 0.9672 32 1 -0.3633 1.0112 -0.1831 33 1 4.4823 -1.0090 0.1831 34 1 4.4811 0.3493 -0.9672 35 1 4.2629 1.9454 0.9178 36 1 4.2641 0.5871 2.0681 37 1 6.5217 -0.0744 1.2833 38 1 6.5198 1.2841 0.1332 39 1 9.5056 0.5860 2.1331 40 1 8.4241 0.7797 0.7295 41 1 10.7021 1.7963 0.3695 42 1 9.3794 2.9812 0.2432 43 1 11.0764 2.4837 2.7319 44 1 11.2643 3.8563 1.6145 45 1 8.2110 5.8671 4.0169 46 1 8.6291 4.9582 5.5080 47 1 9.1626 7.6071 5.3884 48 1 10.3793 6.4992 6.0935 49 1 10.0342 9.9536 6.3269 50 1 12.0186 5.5960 3.3107 51 1 10.6591 6.0709 2.2548 52 1 7.6548 3.4537 3.8708 53 1 9.0035 2.3309 4.1831 RHF calculation, no. of doubly occupied orbitals= 64 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 ZINC001281976074.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 31 2020 16:59:36 Heat of formation + Delta-G solvation = 10.068230 kcal Electronic energy + Delta-G solvation = -28343.305885 eV Core-core repulsion = 24601.692321 eV Total energy + Delta-G solvation = -3741.613564 eV No. of doubly occupied orbitals = 64 Molecular weight (most abundant/longest-lived isotopes) = 332.221 amu Computer time = 1.00 seconds Orbital eigenvalues (eV) -40.41710 -38.41313 -36.72171 -35.92630 -33.80650 -33.41492 -32.30048 -31.20171 -29.94115 -28.87688 -27.53464 -26.63890 -25.35818 -24.36690 -22.86520 -22.36579 -20.76700 -19.93378 -19.37766 -18.92246 -17.47231 -16.79552 -16.66894 -16.26530 -15.81878 -15.29124 -14.77748 -14.52279 -14.42616 -14.18828 -14.05856 -13.92297 -13.82565 -13.77352 -13.37756 -13.25124 -13.08908 -12.68391 -12.45204 -12.38291 -12.17883 -11.87885 -11.64600 -11.52704 -11.29336 -11.20325 -11.01883 -10.97484 -10.88517 -10.79588 -10.53803 -10.07092 -10.05677 -9.99423 -9.95718 -9.88768 -9.71233 -9.65252 -9.36189 -8.66422 -8.58829 -6.76337 -5.59561 -3.01114 2.41737 2.46917 2.55892 2.90913 3.42725 3.47223 3.49513 3.93913 4.30530 4.52810 4.56631 4.68009 4.71471 4.80193 4.83639 4.98060 5.06176 5.10150 5.17579 5.18024 5.23057 5.26863 5.31295 5.32499 5.36888 5.47087 5.50929 5.57996 5.63739 5.65491 5.68463 5.76457 5.83159 5.84619 5.95990 6.01597 6.02711 6.06949 6.11331 6.32406 6.36400 6.47931 6.52232 6.68078 6.72266 6.84707 7.05250 7.32842 7.40575 7.59890 7.68844 7.93291 8.11535 8.43448 9.28052 9.89447 10.55287 11.44122 Molecular weight = 332.22amu Principal moments of inertia in cm(-1) A = 0.015871 B = 0.002048 C = 0.001904 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1763.823195 B =13666.353952 C =14705.041494 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.040 4.040 2 C -0.196 4.196 3 C -0.186 4.186 4 C -0.006 4.006 5 C -0.100 4.100 6 C -0.139 4.139 7 C 0.511 3.489 8 O -0.539 6.539 9 N -0.612 5.612 10 C 0.106 3.894 11 C -0.136 4.136 12 C -0.116 4.116 13 C -0.087 4.087 14 H 0.073 0.927 15 C -0.092 4.092 16 H 0.070 0.930 17 C -0.140 4.140 18 C 0.152 3.848 19 N -0.605 5.605 20 C -0.221 4.221 21 H 0.076 0.924 22 C -0.013 4.013 23 N -0.922 5.922 24 Si 0.914 3.086 25 H -0.289 1.289 26 H -0.291 1.291 27 H -0.282 1.282 28 C 0.145 3.855 29 C 0.117 3.883 30 H 0.078 0.922 31 H 0.079 0.921 32 H 0.080 0.920 33 H 0.085 0.915 34 H 0.086 0.914 35 H 0.075 0.925 36 H 0.074 0.926 37 H 0.094 0.906 38 H 0.095 0.905 39 H 0.069 0.931 40 H 0.083 0.917 41 H 0.074 0.926 42 H 0.067 0.933 43 H 0.063 0.937 44 H 0.071 0.929 45 H 0.059 0.941 46 H 0.056 0.944 47 H 0.105 0.895 48 H 0.010 0.990 49 H 0.251 0.749 50 H 0.017 0.983 51 H 0.021 0.979 52 H 0.095 0.905 53 H 0.064 0.936 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -9.397 -23.639 -12.424 28.310 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 -0.096 4.096 2 C -0.196 4.196 3 C -0.186 4.186 4 C -0.042 4.042 5 C -0.138 4.138 6 C -0.179 4.179 7 C 0.300 3.700 8 O -0.415 6.415 9 N -0.346 5.346 10 C -0.017 4.017 11 C -0.174 4.174 12 C -0.154 4.154 13 C -0.106 4.106 14 H 0.092 0.908 15 C -0.112 4.112 16 H 0.088 0.912 17 C -0.179 4.179 18 C 0.027 3.973 19 N -0.331 5.331 20 C -0.350 4.350 21 H 0.094 0.906 22 C -0.208 4.208 23 N -0.571 5.571 24 Si 0.744 3.256 25 H -0.217 1.217 26 H -0.217 1.217 27 H -0.208 1.208 28 C 0.019 3.981 29 C -0.005 4.005 30 H 0.097 0.903 31 H 0.098 0.902 32 H 0.098 0.902 33 H 0.104 0.896 34 H 0.104 0.896 35 H 0.093 0.907 36 H 0.093 0.907 37 H 0.112 0.888 38 H 0.113 0.887 39 H 0.087 0.913 40 H 0.101 0.899 41 H 0.092 0.908 42 H 0.085 0.915 43 H 0.081 0.919 44 H 0.090 0.910 45 H 0.078 0.922 46 H 0.075 0.925 47 H 0.122 0.878 48 H 0.028 0.972 49 H 0.062 0.938 50 H 0.035 0.965 51 H 0.039 0.961 52 H 0.114 0.886 53 H 0.083 0.917 Dipole moment (debyes) X Y Z Total from point charges -9.807 -23.108 -11.945 27.800 hybrid contribution 0.650 0.823 -0.173 1.063 sum -9.157 -22.285 -12.118 26.968 Atomic orbital electron populations 1.18848 0.84747 1.03041 1.02942 1.22435 0.94002 1.01646 1.01565 1.22304 0.93655 1.01309 1.01327 1.18694 0.84536 1.00883 1.00103 1.21300 0.92919 1.00632 0.98982 1.21702 0.97337 1.00176 0.98706 1.20650 0.81812 0.82538 0.85039 1.90725 1.54665 1.48312 1.47831 1.48183 1.05409 1.45597 1.35399 1.21774 0.91206 0.94504 0.94180 1.21934 0.98645 0.98261 0.98529 1.21604 0.97947 0.98808 0.97037 1.21429 0.95615 0.96034 0.97551 0.90810 1.22131 0.97431 0.95692 0.95914 0.91178 1.23067 0.97432 0.98662 0.98744 1.21915 0.91865 0.94672 0.88866 1.44521 1.52908 1.05717 1.29971 1.19074 1.20877 0.85457 1.09569 0.90613 1.24790 1.00209 0.98259 0.97570 1.69819 1.39153 1.30235 1.17860 0.86084 0.78621 0.83943 0.76927 1.21653 1.21677 1.20798 1.21263 0.95662 0.86955 0.94181 1.21638 0.98453 0.91375 0.89053 0.90343 0.90229 0.90186 0.89643 0.89588 0.90667 0.90748 0.88798 0.88694 0.91289 0.89912 0.90786 0.91468 0.91862 0.91040 0.92203 0.92530 0.87773 0.97204 0.93798 0.96484 0.96120 0.88629 0.91727 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 -0.04 -0.24 10.32 34.37 0.35 0.11 16 2 C -0.20 -1.93 14.13 -37.12 -0.52 -2.45 16 3 C -0.19 -1.86 13.34 -37.12 -0.50 -2.36 16 4 C -0.01 -0.04 5.70 -29.51 -0.17 -0.21 16 5 C -0.10 -0.90 4.46 -26.73 -0.12 -1.01 16 6 C -0.14 -1.06 4.05 -27.89 -0.11 -1.17 16 7 C 0.51 6.24 7.70 -10.99 -0.08 6.15 16 8 O -0.54 -8.99 15.40 5.56 0.09 -8.90 16 9 N -0.61 -6.84 2.98 -173.00 -0.52 -7.36 16 10 C 0.11 0.81 6.34 -3.71 -0.02 0.79 16 11 C -0.14 -1.14 6.08 -26.61 -0.16 -1.30 16 12 C -0.12 -1.30 5.03 -26.69 -0.13 -1.43 16 13 C -0.09 -1.21 1.73 -90.70 -0.16 -1.36 16 14 H 0.07 1.17 8.06 -51.93 -0.42 0.75 16 15 C -0.09 -1.59 2.50 -88.79 -0.22 -1.81 16 16 H 0.07 1.16 8.14 -51.93 -0.42 0.74 16 17 C -0.14 -2.77 5.49 -24.58 -0.13 -2.90 16 18 C 0.15 3.82 5.89 -2.52 -0.01 3.80 16 19 N -0.61 -15.95 3.39 -170.07 -0.58 -16.53 16 20 C -0.22 -6.33 10.27 -15.06 -0.15 -6.49 16 21 H 0.08 2.09 7.83 -52.49 -0.41 1.68 16 22 C -0.01 -0.37 5.49 -17.43 -0.10 -0.47 16 23 N -0.92 -27.60 10.09 55.49 0.56 -27.04 16 24 Si 0.91 22.53 29.55 -169.99 -5.02 17.51 16 25 H -0.29 -7.11 7.11 56.52 0.40 -6.71 16 26 H -0.29 -7.21 7.11 56.52 0.40 -6.80 16 27 H -0.28 -6.77 7.11 56.52 0.40 -6.37 16 28 C 0.15 3.06 5.97 -3.07 -0.02 3.04 16 29 C 0.12 1.54 5.36 -3.91 -0.02 1.52 16 30 H 0.08 0.35 8.14 -51.93 -0.42 -0.07 16 31 H 0.08 0.40 8.14 -51.93 -0.42 -0.02 16 32 H 0.08 0.41 8.14 -51.93 -0.42 -0.01 16 33 H 0.09 0.46 8.14 -51.93 -0.42 0.04 16 34 H 0.09 0.49 8.14 -51.93 -0.42 0.07 16 35 H 0.07 0.81 8.10 -51.93 -0.42 0.39 16 36 H 0.07 0.77 8.10 -51.93 -0.42 0.35 16 37 H 0.09 0.49 7.94 -51.93 -0.41 0.08 16 38 H 0.09 0.55 7.69 -51.93 -0.40 0.15 16 39 H 0.07 0.47 8.14 -51.93 -0.42 0.04 16 40 H 0.08 0.42 5.93 -51.93 -0.31 0.11 16 41 H 0.07 0.48 8.14 -51.93 -0.42 0.06 16 42 H 0.07 0.62 8.14 -51.93 -0.42 0.20 16 43 H 0.06 0.66 8.14 -51.93 -0.42 0.24 16 44 H 0.07 0.86 7.45 -51.93 -0.39 0.47 16 45 H 0.06 1.22 8.05 -51.93 -0.42 0.80 16 46 H 0.06 1.01 8.14 -51.93 -0.42 0.58 16 47 H 0.10 2.96 5.88 -51.93 -0.31 2.65 16 48 H 0.01 0.26 8.14 -51.93 -0.42 -0.16 16 49 H 0.25 7.29 8.31 -40.82 -0.34 6.95 16 50 H 0.02 0.36 8.14 -51.93 -0.42 -0.06 16 51 H 0.02 0.44 7.76 -51.93 -0.40 0.03 16 52 H 0.10 1.51 6.36 -51.93 -0.33 1.18 16 53 H 0.06 0.80 8.14 -51.93 -0.42 0.38 16 LS Contribution 414.03 15.07 6.24 6.24 Total: -1.00 -34.70 414.03 -11.21 -45.90 By element: Atomic # 1 Polarization: 7.42 SS G_CDS: -9.69 Total: -2.27 kcal Atomic # 6 Polarization: -5.27 SS G_CDS: -2.29 Total: -7.55 kcal Atomic # 7 Polarization: -50.40 SS G_CDS: -0.53 Total: -50.93 kcal Atomic # 8 Polarization: -8.99 SS G_CDS: 0.09 Total: -8.90 kcal Atomic # 14 Polarization: 22.53 SS G_CDS: -5.02 Total: 17.51 kcal Total LS contribution 6.24 Total: 6.24 kcal Total: -34.70 -11.21 -45.90 kcal The number of atoms in the molecule is 53 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. ZINC001281976074.mol2 53 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 55.970 kcal (2) G-P(sol) polarization free energy of solvation -34.696 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 21.275 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.207 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.902 kcal (6) G-S(sol) free energy of system = (1) + (5) 10.068 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.00 seconds