Wall clock time and date at job start Sat Apr 11 2020 06:09:49 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 1.53009 * 1 3 3 C 1.53007 * 109.46856 * 2 1 4 4 C 1.50693 * 110.64067 * 294.16157 * 3 2 1 5 5 O 1.21286 * 119.99648 * 114.73686 * 4 3 2 6 6 N 1.34779 * 120.00391 * 294.73451 * 4 3 2 7 7 C 1.46498 * 119.99894 * 354.60362 * 6 4 3 8 8 C 1.46503 * 120.00152 * 174.59788 * 6 4 3 9 9 C 1.50701 * 109.47054 * 90.00112 * 8 6 4 10 10 H 1.08005 * 119.99720 * 0.02562 * 9 8 6 11 11 C 1.37874 * 120.00131 * 180.02562 * 9 8 6 12 12 N 1.31512 * 119.99758 * 0.02562 * 11 9 8 13 13 Si 1.86798 * 119.99803 * 180.02562 * 11 9 8 14 14 H 1.48499 * 109.47176 * 269.99907 * 13 11 9 15 15 H 1.48503 * 109.47400 * 30.00136 * 13 11 9 16 16 H 1.48503 * 109.47023 * 150.00031 * 13 11 9 17 17 C 1.55156 * 110.71590 * 171.02014 * 3 2 1 18 18 C 1.54901 * 101.58204 * 205.95647 * 17 3 2 19 19 N 1.47424 * 104.83039 * 37.01294 * 18 17 3 20 20 C 1.34776 * 125.64789 * 155.90681 * 19 18 17 21 21 O 1.21517 * 119.99938 * 179.97438 * 20 19 18 22 22 O 1.34633 * 120.00214 * 359.97438 * 20 19 18 23 23 C 1.45204 * 116.99949 * 180.02562 * 22 20 19 24 24 C 1.52998 * 109.47420 * 59.99803 * 23 22 20 25 25 C 1.53003 * 109.47039 * 179.97438 * 23 22 20 26 26 C 1.53002 * 109.47043 * 299.99413 * 23 22 20 27 27 C 1.47023 * 108.70465 * 335.86929 * 19 18 17 28 28 H 1.08996 * 109.46702 * 176.29740 * 1 2 3 29 29 H 1.09004 * 109.46512 * 296.29390 * 1 2 3 30 30 H 1.08997 * 109.47210 * 56.29549 * 1 2 3 31 31 H 1.08999 * 109.47046 * 240.00626 * 2 1 3 32 32 H 1.08995 * 109.47203 * 120.00485 * 2 1 3 33 33 H 1.09004 * 109.46826 * 265.07337 * 7 6 4 34 34 H 1.09003 * 109.47061 * 25.06711 * 7 6 4 35 35 H 1.08998 * 109.47379 * 145.06795 * 7 6 4 36 36 H 1.09002 * 109.46738 * 330.00341 * 8 6 4 37 37 H 1.08994 * 109.47377 * 210.00232 * 8 6 4 38 38 H 0.97002 * 120.00344 * 0.02562 * 12 11 9 39 39 H 1.08995 * 111.00851 * 324.03600 * 17 3 2 40 40 H 1.09003 * 111.00120 * 87.88741 * 17 3 2 41 41 H 1.09000 * 110.37171 * 155.85196 * 18 17 3 42 42 H 1.09003 * 110.37296 * 278.17347 * 18 17 3 43 43 H 1.08994 * 109.47125 * 59.99779 * 24 23 22 44 44 H 1.08999 * 109.47147 * 179.97438 * 24 23 22 45 45 H 1.08999 * 109.46949 * 299.99803 * 24 23 22 46 46 H 1.08995 * 109.47221 * 59.99539 * 25 23 22 47 47 H 1.08999 * 109.47354 * 179.97438 * 25 23 22 48 48 H 1.09003 * 109.46886 * 299.99661 * 25 23 22 49 49 H 1.08999 * 109.47090 * 60.00342 * 26 23 22 50 50 H 1.08999 * 109.47002 * 180.02562 * 26 23 22 51 51 H 1.08995 * 109.47073 * 300.00373 * 26 23 22 52 52 H 1.09004 * 109.88705 * 241.64409 * 27 19 18 53 53 H 1.09004 * 109.88411 * 120.47466 * 27 19 18 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 1.5301 0.0000 0.0000 3 6 2.0400 1.4426 0.0000 4 6 1.6729 2.1358 -1.2867 5 8 0.9013 3.0715 -1.2725 6 7 2.2018 1.7161 -2.4531 7 6 3.2224 0.6651 -2.4585 8 6 1.7561 2.3107 -3.7156 9 6 2.6200 3.5015 -4.0426 10 1 3.4212 3.7865 -3.3768 11 6 2.3875 4.2270 -5.1918 12 7 1.4116 3.8802 -6.0022 13 14 3.4588 5.7026 -5.5973 14 1 2.8631 6.9255 -5.0017 15 1 4.8200 5.4938 -5.0416 16 1 3.5450 5.8615 -7.0713 17 6 3.5745 1.4823 0.2265 18 6 3.7602 2.8869 0.8526 19 7 2.5777 3.0761 1.7125 20 6 2.5046 3.8985 2.7778 21 8 1.4737 3.9752 3.4165 22 8 3.5737 4.6350 3.1343 23 6 3.4231 5.4981 4.2922 24 6 3.0802 4.6506 5.5189 25 6 4.7323 6.2495 4.5418 26 6 2.2985 6.5033 4.0361 27 6 1.4911 2.2198 1.2150 28 1 -0.3632 -1.0255 -0.0664 29 1 -0.3632 0.4553 0.9214 30 1 -0.3633 0.5702 -0.8549 31 1 1.8934 -0.5137 -0.8900 32 1 1.8934 -0.5139 0.8899 33 1 4.2127 1.1204 -2.4714 34 1 3.1165 0.0512 -1.5640 35 1 3.0974 0.0417 -3.3438 36 1 0.7183 2.6300 -3.6204 37 1 1.8375 1.5728 -4.5136 38 1 0.8551 3.1142 -5.7914 39 1 3.8875 0.7012 0.9193 40 1 4.1111 1.4019 -0.7188 41 1 4.6719 2.9190 1.4491 42 1 3.7886 3.6489 0.0737 43 1 3.8815 3.9345 5.7013 44 1 2.9677 5.2985 6.3882 45 1 2.1477 4.1150 5.3414 46 1 4.9771 6.8532 3.6680 47 1 4.6192 6.8978 5.4107 48 1 5.5333 5.5331 4.7244 49 1 1.3659 5.9677 3.8585 50 1 2.1857 7.1515 4.9052 51 1 2.5428 7.1071 3.1622 52 1 0.6444 2.8348 0.9098 53 1 1.1833 1.5215 1.9934 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 ZINC000125860623.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sat Apr 11 2020 06:09:49 Heat of formation + Delta-G solvation = -106.839474 kcal Electronic energy + Delta-G solvation = -32385.724698 eV Core-core repulsion = 28258.129532 eV Total energy + Delta-G solvation = -4127.595166 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.74 seconds Orbital eigenvalues (eV) -41.07919 -40.22236 -37.77267 -36.43600 -35.18671 -34.48593 -33.74760 -32.74053 -30.69619 -28.32204 -27.66483 -27.54783 -27.48000 -26.04431 -24.97730 -23.19969 -22.51673 -21.87460 -20.91923 -19.40589 -18.48149 -17.82738 -16.95479 -16.82275 -16.44404 -15.88432 -15.72906 -15.33349 -15.03877 -14.53316 -14.27046 -13.92977 -13.86877 -13.70973 -13.65670 -13.30649 -13.14526 -12.80440 -12.64216 -12.63150 -12.46757 -12.25951 -12.17822 -12.08823 -12.02056 -11.93325 -11.84390 -11.49915 -11.38262 -11.35435 -11.16897 -11.09917 -10.93877 -10.71015 -10.61105 -10.47597 -10.41812 -10.13510 -10.00351 -9.16258 -8.98252 -8.64919 -8.39930 -7.68100 -6.40248 -4.12142 2.09378 2.90820 3.21914 3.42592 3.46454 3.60365 3.72070 3.85002 4.32561 4.49356 4.51563 4.58921 4.60790 4.63765 4.77624 4.90018 5.09733 5.16793 5.25398 5.30715 5.34385 5.37381 5.40009 5.41882 5.47364 5.52810 5.57977 5.59083 5.64806 5.70632 5.74114 5.77484 5.83164 5.87615 5.87818 5.97169 5.99725 6.06229 6.11865 6.15403 6.20182 6.26912 6.30498 6.45843 6.75119 7.06224 7.33228 7.52245 8.00789 8.20919 8.38370 8.40519 8.75257 8.93159 9.57160 10.97277 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.010579 B = 0.003684 C = 0.003014 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2646.155675 B = 7599.530698 C = 9287.954765 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.158 4.158 2 C -0.110 4.110 3 C -0.094 4.094 4 C 0.522 3.478 5 O -0.530 6.530 6 N -0.594 5.594 7 C 0.069 3.931 8 C 0.237 3.763 9 C -0.603 4.603 10 H 0.051 0.949 11 C 0.020 3.980 12 N -0.910 5.910 13 Si 1.073 2.927 14 H -0.287 1.287 15 H -0.289 1.289 16 H -0.283 1.283 17 C -0.136 4.136 18 C 0.103 3.897 19 N -0.598 5.598 20 C 0.670 3.330 21 O -0.570 6.570 22 O -0.361 6.361 23 C 0.135 3.865 24 C -0.182 4.182 25 C -0.140 4.140 26 C -0.185 4.185 27 C 0.147 3.853 28 H 0.058 0.942 29 H 0.058 0.942 30 H 0.060 0.940 31 H 0.083 0.917 32 H 0.074 0.926 33 H 0.054 0.946 34 H 0.074 0.926 35 H 0.064 0.936 36 H 0.031 0.969 37 H 0.022 0.978 38 H 0.267 0.733 39 H 0.086 0.914 40 H 0.105 0.895 41 H 0.082 0.918 42 H 0.075 0.925 43 H 0.058 0.942 44 H 0.068 0.932 45 H 0.088 0.912 46 H 0.067 0.933 47 H 0.079 0.921 48 H 0.065 0.935 49 H 0.088 0.912 50 H 0.068 0.932 51 H 0.061 0.939 52 H 0.092 0.908 53 H 0.075 0.925 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 7.139 -6.504 19.650 21.895 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 -0.215 4.215 2 C -0.147 4.147 3 C -0.098 4.098 4 C 0.307 3.693 5 O -0.406 6.406 6 N -0.325 5.325 7 C -0.074 4.074 8 C 0.118 3.882 9 C -0.642 4.642 10 H 0.069 0.931 11 C -0.184 4.184 12 N -0.546 5.546 13 Si 0.901 3.099 14 H -0.214 1.214 15 H -0.215 1.215 16 H -0.209 1.209 17 C -0.174 4.174 18 C -0.020 4.020 19 N -0.338 5.338 20 C 0.425 3.575 21 O -0.460 6.460 22 O -0.276 6.276 23 C 0.099 3.901 24 C -0.239 4.239 25 C -0.197 4.197 26 C -0.242 4.242 27 C 0.025 3.975 28 H 0.077 0.923 29 H 0.077 0.923 30 H 0.079 0.921 31 H 0.101 0.899 32 H 0.093 0.907 33 H 0.073 0.927 34 H 0.093 0.907 35 H 0.082 0.918 36 H 0.049 0.951 37 H 0.040 0.960 38 H 0.078 0.922 39 H 0.105 0.895 40 H 0.123 0.877 41 H 0.100 0.900 42 H 0.093 0.907 43 H 0.077 0.923 44 H 0.087 0.913 45 H 0.106 0.894 46 H 0.086 0.914 47 H 0.098 0.902 48 H 0.084 0.916 49 H 0.107 0.893 50 H 0.087 0.913 51 H 0.080 0.920 52 H 0.110 0.890 53 H 0.093 0.907 Dipole moment (debyes) X Y Z Total from point charges 6.669 -4.663 18.823 20.507 hybrid contribution -0.107 -1.119 1.071 1.553 sum 6.562 -5.783 19.894 21.732 Atomic orbital electron populations 1.21840 0.94924 1.01913 1.02831 1.21715 0.97051 0.92680 1.03262 1.21868 0.96855 0.96808 0.94255 1.19777 0.81552 0.83722 0.84255 1.90692 1.36303 1.27728 1.85904 1.47829 1.39364 1.37713 1.07613 1.22121 0.92124 0.90911 1.02275 1.19353 0.96383 0.93490 0.78992 1.22232 1.18010 1.14194 1.09788 0.93072 1.25786 0.98125 1.01639 0.92888 1.70776 1.17806 1.27726 1.38314 0.83489 0.74957 0.75288 0.76175 1.21379 1.21522 1.20909 1.23306 0.94137 0.96924 1.03041 1.22374 0.88282 0.97422 0.93905 1.47035 1.15867 1.43039 1.27891 1.17377 0.81896 0.78122 0.80104 1.90881 1.30816 1.69500 1.54807 1.86305 1.38979 1.54070 1.48273 1.22049 0.96843 0.88640 0.82606 1.22509 1.04045 1.00682 0.96677 1.21850 0.95196 1.00024 1.02634 1.22522 1.00248 0.99071 1.02340 1.21851 0.89684 0.92421 0.93501 0.92291 0.92269 0.92074 0.89864 0.90722 0.92715 0.90748 0.91750 0.95070 0.96034 0.92238 0.89502 0.87725 0.89950 0.90685 0.92327 0.91272 0.89369 0.91376 0.90235 0.91572 0.89297 0.91274 0.92019 0.88982 0.90715 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 14. 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 -0.16 -1.88 9.46 37.16 0.35 -1.53 16 2 C -0.11 -1.21 4.58 -26.72 -0.12 -1.33 16 3 C -0.09 -1.33 0.26 -153.83 -0.04 -1.37 16 4 C 0.52 10.31 5.39 -10.99 -0.06 10.26 16 5 O -0.53 -13.16 15.07 5.55 0.08 -13.07 16 6 N -0.59 -11.90 2.86 -182.95 -0.52 -12.43 16 7 C 0.07 1.00 8.41 59.85 0.50 1.51 16 8 C 0.24 6.01 4.48 -5.19 -0.02 5.99 16 9 C -0.60 -17.04 9.39 -34.44 -0.32 -17.36 16 10 H 0.05 1.46 7.81 -52.48 -0.41 1.05 16 11 C 0.02 0.57 5.46 -17.82 -0.10 0.47 16 12 N -0.91 -27.62 13.65 55.43 0.76 -26.86 16 13 Si 1.07 25.68 29.90 -169.99 -5.08 20.59 16 14 H -0.29 -6.81 7.11 56.52 0.40 -6.41 16 15 H -0.29 -6.52 7.11 56.52 0.40 -6.12 16 16 H -0.28 -6.66 7.11 56.52 0.40 -6.26 16 17 C -0.14 -1.60 5.16 -24.59 -0.13 -1.73 16 18 C 0.10 1.42 6.74 -2.53 -0.02 1.40 16 19 N -0.60 -9.39 3.33 -176.30 -0.59 -9.97 16 20 C 0.67 11.01 7.93 54.05 0.43 11.44 16 21 O -0.57 -10.22 12.21 -19.29 -0.24 -10.46 16 22 O -0.36 -5.27 9.42 -40.30 -0.38 -5.65 16 23 C 0.14 1.59 1.13 -90.62 -0.10 1.49 16 24 C -0.18 -1.95 8.37 37.16 0.31 -1.64 16 25 C -0.14 -1.23 8.85 37.16 0.33 -0.90 16 26 C -0.18 -2.24 8.37 37.16 0.31 -1.93 16 27 C 0.15 2.27 4.95 -3.07 -0.02 2.25 16 28 H 0.06 0.58 8.14 -51.93 -0.42 0.16 16 29 H 0.06 0.69 7.03 -51.93 -0.37 0.32 16 30 H 0.06 0.91 7.36 -51.93 -0.38 0.53 16 31 H 0.08 0.87 5.39 -51.93 -0.28 0.59 16 32 H 0.07 0.65 8.05 -51.93 -0.42 0.23 16 33 H 0.05 0.78 7.18 -51.93 -0.37 0.40 16 34 H 0.07 0.82 3.35 -51.93 -0.17 0.64 16 35 H 0.06 0.90 7.96 -51.93 -0.41 0.48 16 36 H 0.03 0.89 7.37 -51.93 -0.38 0.51 16 37 H 0.02 0.54 7.81 -51.93 -0.41 0.14 16 38 H 0.27 8.03 7.22 -40.82 -0.29 7.74 16 39 H 0.09 0.77 7.98 -51.93 -0.41 0.36 16 40 H 0.10 1.22 4.61 -51.93 -0.24 0.98 16 41 H 0.08 0.96 8.04 -51.93 -0.42 0.54 16 42 H 0.07 1.23 8.14 -51.93 -0.42 0.81 16 43 H 0.06 0.58 8.14 -51.93 -0.42 0.16 16 44 H 0.07 0.59 8.14 -51.93 -0.42 0.17 16 45 H 0.09 1.16 5.88 -51.93 -0.31 0.86 16 46 H 0.07 0.61 8.14 -51.93 -0.42 0.19 16 47 H 0.08 0.53 8.14 -51.93 -0.42 0.11 16 48 H 0.07 0.54 8.14 -51.93 -0.42 0.12 16 49 H 0.09 1.32 5.88 -51.93 -0.31 1.01 16 50 H 0.07 0.66 8.14 -51.93 -0.42 0.24 16 51 H 0.06 0.76 8.14 -51.93 -0.42 0.34 16 52 H 0.09 1.73 6.78 -51.93 -0.35 1.37 16 53 H 0.07 1.01 7.32 -51.93 -0.38 0.63 16 LS Contribution 402.96 15.07 6.07 6.07 Total: -1.00 -35.38 402.96 -7.50 -42.88 By element: Atomic # 1 Polarization: 10.79 SS G_CDS: -8.91 Total: 1.88 kcal Atomic # 6 Polarization: 5.71 SS G_CDS: 1.31 Total: 7.02 kcal Atomic # 7 Polarization: -48.91 SS G_CDS: -0.35 Total: -49.26 kcal Atomic # 8 Polarization: -28.65 SS G_CDS: -0.53 Total: -29.18 kcal Atomic # 14 Polarization: 25.68 SS G_CDS: -5.08 Total: 20.59 kcal Total LS contribution 6.07 Total: 6.07 kcal Total: -35.38 -7.50 -42.88 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. ZINC000125860623.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 -63.957 kcal (2) G-P(sol) polarization free energy of solvation -35.382 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -99.340 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -7.500 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.882 kcal (6) G-S(sol) free energy of system = (1) + (5) -106.839 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.74 seconds