Wall clock time and date at job start Fri Apr 10 2020 22:20:58 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 * 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 C 2 2 C 1.52988 * 1 3 3 C 1.53003 * 109.47652 * 2 1 4 4 C 1.52995 * 109.47234 * 179.97438 * 3 2 1 5 5 C 1.53004 * 109.47057 * 179.97438 * 4 3 2 6 6 C 1.52992 * 109.47386 * 179.97438 * 5 4 3 7 7 C 1.53004 * 109.47386 * 180.02562 * 6 5 4 8 8 C 1.52995 * 109.47057 * 180.02562 * 7 6 5 9 9 C 1.53010 * 109.47021 * 180.02562 * 8 7 6 10 10 C 1.52991 * 109.47110 * 180.02562 * 9 8 7 11 11 H 1.08995 * 109.47688 * 54.99592 * 10 9 8 12 12 C 1.53003 * 109.47369 * 174.99950 * 10 9 8 13 13 N 1.46904 * 109.47169 * 294.99820 * 10 9 8 14 14 C 1.46900 * 111.00020 * 153.62521 * 13 10 9 15 15 H 1.09001 * 109.41421 * 31.15248 * 14 13 10 16 16 C 1.52967 * 109.41213 * 150.94099 * 14 13 10 17 17 C 1.53228 * 109.40121 * 183.70483 * 16 14 13 18 18 C 1.51267 * 108.53452 * 305.36778 * 17 16 14 19 19 C 1.37885 * 120.84911 * 231.36836 * 18 17 16 20 20 N 1.31509 * 119.99956 * 165.02529 * 19 18 17 21 21 Si 1.86800 * 119.99941 * 345.02873 * 19 18 17 22 22 H 1.48495 * 109.47322 * 354.70774 * 21 19 18 23 23 H 1.48503 * 109.46937 * 114.70566 * 21 19 18 24 24 H 1.48499 * 109.46864 * 234.70528 * 21 19 18 25 25 C 1.51267 * 118.30007 * 51.35467 * 18 17 16 26 26 C 1.52959 * 109.41313 * 271.28745 * 14 13 10 27 27 H 1.09008 * 109.47080 * 59.99966 * 1 2 3 28 28 H 1.08997 * 109.47551 * 180.02562 * 1 2 3 29 29 H 1.09008 * 109.47272 * 300.00267 * 1 2 3 30 30 H 1.09008 * 109.47272 * 239.99732 * 2 1 3 31 31 H 1.09008 * 109.47080 * 120.00033 * 2 1 3 32 32 H 1.09000 * 109.46746 * 59.99736 * 3 2 1 33 33 H 1.08998 * 109.47038 * 300.00156 * 3 2 1 34 34 H 1.09000 * 109.47308 * 60.00277 * 4 3 2 35 35 H 1.08998 * 109.47397 * 300.00134 * 4 3 2 36 36 H 1.08998 * 109.47411 * 300.00474 * 5 4 3 37 37 H 1.09008 * 109.46805 * 59.99992 * 5 4 3 38 38 H 1.08998 * 109.47355 * 300.00658 * 6 5 4 39 39 H 1.09000 * 109.47021 * 60.00600 * 6 5 4 40 40 H 1.08998 * 109.47411 * 300.00624 * 7 6 5 41 41 H 1.09004 * 109.46417 * 60.00785 * 7 6 5 42 42 H 1.08998 * 109.47397 * 300.00482 * 8 7 6 43 43 H 1.09000 * 109.47308 * 60.00626 * 8 7 6 44 44 H 1.08996 * 109.46653 * 299.99833 * 9 8 7 45 45 H 1.09000 * 109.46976 * 59.99924 * 9 8 7 46 46 H 1.08998 * 109.46774 * 64.93930 * 12 10 9 47 47 H 1.08993 * 109.47374 * 184.94553 * 12 10 9 48 48 H 1.09000 * 109.46511 * 304.94836 * 12 10 9 49 49 H 1.00902 * 110.99851 * 29.66634 * 13 10 9 50 50 H 1.09000 * 109.47769 * 303.67977 * 16 14 13 51 51 H 1.08993 * 109.48053 * 63.72359 * 16 14 13 52 52 H 1.09009 * 109.62128 * 185.65814 * 17 16 14 53 53 H 1.08995 * 109.78465 * 65.17821 * 17 16 14 54 54 H 0.97004 * 120.00267 * 180.02562 * 20 19 18 55 55 H 1.09004 * 109.62343 * 188.93607 * 25 18 17 56 56 H 1.08998 * 109.62945 * 68.36479 * 25 18 17 57 57 H 1.09003 * 109.48636 * 296.27933 * 26 14 13 58 58 H 1.09008 * 109.47700 * 56.30638 * 26 14 13 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 1.5299 0.0000 0.0000 3 6 2.0400 1.4425 0.0000 4 6 3.5700 1.4424 0.0006 5 6 4.0801 2.8849 0.0000 6 6 5.6100 2.8848 0.0013 7 6 6.1201 4.3273 0.0013 8 6 7.6500 4.3272 0.0019 9 6 8.1602 5.7698 0.0026 10 6 9.6901 5.7697 0.0026 11 1 10.0535 5.1806 -0.8394 12 6 10.2002 7.2067 -0.1225 13 7 10.1797 5.1838 1.2576 14 6 11.5136 4.5950 1.0785 15 1 12.0579 5.1553 0.3183 16 6 12.2794 4.6592 2.4011 17 6 13.7021 4.1301 2.1917 18 6 13.6163 2.7459 1.5878 19 6 14.3014 1.6873 2.1457 20 7 13.9969 0.4542 1.8050 21 14 15.6621 2.0049 3.3855 22 1 15.8954 3.4669 3.5009 23 1 15.2630 1.4614 4.7085 24 1 16.9097 1.3388 2.9326 25 6 12.7593 2.5526 0.3564 26 6 11.3708 3.1389 0.6323 27 1 -0.3634 0.5139 -0.8900 28 1 -0.3634 -1.0276 0.0005 29 1 -0.3634 0.5139 0.8900 30 1 1.8933 -0.5139 -0.8900 31 1 1.8932 -0.5139 0.8900 32 1 1.6767 1.9563 0.8900 33 1 1.6767 1.9563 -0.8900 34 1 3.9337 0.9284 -0.8891 35 1 3.9329 0.9286 0.8908 36 1 3.7171 3.3982 -0.8904 37 1 3.7163 3.3992 0.8896 38 1 5.9726 2.3716 0.8919 39 1 5.9741 2.3704 -0.8881 40 1 5.7575 4.8410 -0.8891 41 1 5.7561 4.8413 0.8910 42 1 8.0130 3.8134 0.8921 43 1 8.0138 3.8133 -0.8879 44 1 7.7972 6.2838 -0.8874 45 1 7.7965 6.2834 0.8926 46 1 9.9110 7.7733 0.7626 47 1 11.2865 7.2003 -0.2109 48 1 9.7663 7.6704 -1.0084 49 1 9.5285 4.5018 1.6165 50 1 12.3229 5.6923 2.7461 51 1 11.7702 4.0480 3.1461 52 1 14.2188 4.0800 3.1502 53 1 14.2459 4.7910 1.5167 54 1 14.4787 -0.2906 2.1977 55 1 12.6702 1.4888 0.1356 56 1 13.2129 3.0682 -0.4901 57 1 10.8830 2.5636 1.4193 58 1 10.7700 3.0944 -0.2762 RHF calculation, no. of doubly occupied orbitals= 62 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) 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=WATER ZINC001258232053.mol2 58 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Fri Apr 10 2020 22:20:58 Heat of formation + Delta-G solvation = -89.285634 kcal Electronic energy + Delta-G solvation = -25869.654105 eV Core-core repulsion = 22554.132042 eV Total energy + Delta-G solvation = -3315.522063 eV No. of doubly occupied orbitals = 62 Molecular weight (most abundant/longest-lived isotopes) = 309.273 amu Computer time = 1.14 seconds Orbital eigenvalues (eV) -39.75826 -38.05161 -37.23342 -35.70592 -34.29856 -32.97972 -31.57916 -31.10846 -29.80895 -27.99564 -26.87003 -24.23066 -23.43368 -23.22583 -22.18943 -21.86679 -21.54410 -21.17332 -20.79457 -18.12666 -17.16376 -16.73071 -16.42246 -16.19962 -15.99538 -15.22077 -15.05111 -14.91095 -14.76060 -14.58360 -14.50646 -14.15073 -13.96645 -13.79094 -13.75134 -13.31579 -13.20364 -13.12677 -12.83145 -12.76496 -12.72034 -12.66446 -12.42861 -12.29469 -12.08791 -11.96191 -11.83654 -11.78290 -11.76269 -11.66625 -11.59652 -11.49100 -11.34430 -11.29523 -11.28785 -10.89119 -10.72823 -10.72021 -10.37639 -9.13444 -8.19223 -6.07143 1.36613 1.41918 1.52254 2.41772 3.05576 3.37518 3.63173 3.94664 3.97645 4.03747 4.09216 4.13659 4.19435 4.26980 4.32490 4.38311 4.41259 4.50004 4.58424 4.60791 4.66009 4.73939 4.76849 4.81760 4.84090 4.88305 4.91604 4.93439 4.97009 4.99965 5.03442 5.05923 5.09889 5.10629 5.12759 5.17400 5.20758 5.22499 5.25127 5.30592 5.33823 5.34886 5.38444 5.40947 5.46224 5.48398 5.52842 5.55438 5.57824 5.60139 5.64830 5.75778 5.87071 6.33500 6.36939 6.65409 6.96291 7.47777 8.92305 Molecular weight = 309.27amu Principal moments of inertia in cm(-1) A = 0.012854 B = 0.002260 C = 0.001980 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2177.704318 B =12386.712556 C =14136.163206 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.152 4.152 2 C -0.129 4.129 3 C -0.117 4.117 4 C -0.122 4.122 5 C -0.113 4.113 6 C -0.122 4.122 7 C -0.108 4.108 8 C -0.123 4.123 9 C -0.109 4.109 10 C 0.078 3.922 11 H 0.027 0.973 12 C -0.134 4.134 13 N -0.682 5.682 14 C 0.113 3.887 15 H 0.057 0.943 16 C -0.084 4.084 17 C -0.018 4.018 18 C -0.501 4.501 19 C 0.021 3.979 20 N -0.928 5.928 21 Si 0.936 3.064 22 H -0.245 1.245 23 H -0.282 1.282 24 H -0.288 1.288 25 C 0.008 3.992 26 C -0.116 4.116 27 H 0.056 0.944 28 H 0.056 0.944 29 H 0.055 0.945 30 H 0.058 0.942 31 H 0.057 0.943 32 H 0.062 0.938 33 H 0.063 0.937 34 H 0.056 0.944 35 H 0.055 0.945 36 H 0.065 0.935 37 H 0.063 0.937 38 H 0.051 0.949 39 H 0.054 0.946 40 H 0.068 0.932 41 H 0.066 0.934 42 H 0.049 0.951 43 H 0.049 0.951 44 H 0.080 0.920 45 H 0.073 0.927 46 H 0.061 0.939 47 H 0.037 0.963 48 H 0.070 0.930 49 H 0.338 0.662 50 H 0.056 0.944 51 H 0.038 0.962 52 H 0.032 0.968 53 H 0.016 0.984 54 H 0.262 0.738 55 H 0.019 0.981 56 H -0.003 1.003 57 H 0.035 0.965 58 H 0.037 0.963 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -23.067 7.793 -4.251 24.717 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 -0.210 4.210 2 C -0.166 4.166 3 C -0.154 4.154 4 C -0.160 4.160 5 C -0.151 4.151 6 C -0.160 4.160 7 C -0.146 4.146 8 C -0.161 4.161 9 C -0.147 4.147 10 C -0.032 4.032 11 H 0.045 0.955 12 C -0.192 4.192 13 N -0.313 5.313 14 C 0.003 3.997 15 H 0.075 0.925 16 C -0.123 4.123 17 C -0.056 4.056 18 C -0.520 4.520 19 C -0.178 4.178 20 N -0.567 5.567 21 Si 0.762 3.238 22 H -0.169 1.169 23 H -0.208 1.208 24 H -0.214 1.214 25 C -0.030 4.030 26 C -0.155 4.155 27 H 0.075 0.925 28 H 0.075 0.925 29 H 0.074 0.926 30 H 0.077 0.923 31 H 0.076 0.924 32 H 0.080 0.920 33 H 0.082 0.918 34 H 0.075 0.925 35 H 0.073 0.927 36 H 0.084 0.916 37 H 0.082 0.918 38 H 0.070 0.930 39 H 0.072 0.928 40 H 0.087 0.913 41 H 0.085 0.915 42 H 0.068 0.932 43 H 0.068 0.932 44 H 0.099 0.901 45 H 0.092 0.908 46 H 0.080 0.920 47 H 0.057 0.943 48 H 0.089 0.911 49 H 0.158 0.842 50 H 0.075 0.925 51 H 0.057 0.943 52 H 0.051 0.949 53 H 0.034 0.966 54 H 0.071 0.929 55 H 0.038 0.962 56 H 0.016 0.984 57 H 0.053 0.947 58 H 0.055 0.945 Dipole moment (debyes) X Y Z Total from point charges -22.805 8.231 -3.984 24.570 hybrid contribution 0.926 -1.576 -0.002 1.828 sum -21.879 6.656 -3.985 23.214 Atomic orbital electron populations 1.21777 0.95368 1.01863 1.01970 1.21568 0.96350 0.96928 1.01802 1.21598 0.94892 0.96798 1.02130 1.21620 0.95780 0.96916 1.01641 1.21553 0.94609 0.96697 1.02228 1.21611 0.95962 0.96969 1.01425 1.21505 0.94014 0.96623 1.02447 1.21636 0.96506 0.96859 1.01059 1.21700 0.92965 0.96803 1.03223 1.21614 0.95296 0.95950 0.90341 0.95493 1.21756 1.00166 0.95252 1.01978 1.60828 1.03556 1.38395 1.28567 1.21218 0.89606 0.91993 0.96901 0.92501 1.21382 0.95945 0.98776 0.96184 1.19809 0.94459 0.94858 0.96509 1.20614 1.26699 0.93155 1.11519 1.25634 0.98966 0.94500 0.98659 1.70045 1.41321 0.99076 1.46280 0.85860 0.79662 0.79455 0.78868 1.16904 1.20846 1.21406 1.19313 0.92740 0.96078 0.94868 1.22028 0.98054 0.97273 0.98149 0.92513 0.92518 0.92614 0.92278 0.92416 0.91954 0.91795 0.92474 0.92669 0.91604 0.91822 0.92988 0.92759 0.91290 0.91549 0.93189 0.93195 0.90115 0.90840 0.92038 0.94337 0.91108 0.84246 0.92500 0.94274 0.94948 0.96595 0.92920 0.96193 0.98419 0.94664 0.94482 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 -0.15 -1.68 9.91 71.98 0.71 -0.97 16 2 C -0.13 -1.66 5.93 30.59 0.18 -1.47 16 3 C -0.12 -1.52 5.21 30.59 0.16 -1.36 16 4 C -0.12 -1.84 5.21 30.59 0.16 -1.68 16 5 C -0.11 -1.70 5.21 30.59 0.16 -1.54 16 6 C -0.12 -2.19 5.21 30.59 0.16 -2.03 16 7 C -0.11 -1.87 5.21 30.59 0.16 -1.71 16 8 C -0.12 -2.61 5.05 30.60 0.15 -2.46 16 9 C -0.11 -2.23 4.80 30.59 0.15 -2.09 16 10 C 0.08 2.03 2.44 44.91 0.11 2.14 16 11 H 0.03 0.80 7.38 -2.39 -0.02 0.78 16 12 C -0.13 -3.17 9.40 71.98 0.68 -2.50 16 13 N -0.68 -21.21 6.07 -469.60 -2.85 -24.06 16 14 C 0.11 4.29 2.16 44.89 0.10 4.38 16 15 H 0.06 2.25 7.25 -2.39 -0.02 2.23 16 16 C -0.08 -3.45 5.54 30.66 0.17 -3.28 16 17 C -0.02 -0.85 5.47 30.10 0.16 -0.68 16 18 C -0.50 -26.98 5.45 -16.17 -0.09 -27.06 16 19 C 0.02 1.16 5.43 84.66 0.46 1.62 16 20 N -0.93 -55.55 12.80 21.45 0.27 -55.27 16 21 Si 0.94 43.77 27.64 68.60 1.90 45.67 16 22 H -0.25 -10.74 6.11 99.48 0.61 -10.14 16 23 H -0.28 -13.05 7.11 99.48 0.71 -12.34 16 24 H -0.29 -13.39 7.11 99.48 0.71 -12.68 16 25 C 0.01 0.42 5.99 30.10 0.18 0.60 16 26 C -0.12 -5.00 5.17 30.66 0.16 -4.84 16 27 H 0.06 0.58 8.14 -2.38 -0.02 0.56 16 28 H 0.06 0.58 8.14 -2.39 -0.02 0.56 16 29 H 0.05 0.59 8.14 -2.38 -0.02 0.57 16 30 H 0.06 0.77 8.14 -2.38 -0.02 0.75 16 31 H 0.06 0.77 8.14 -2.38 -0.02 0.76 16 32 H 0.06 0.79 8.14 -2.39 -0.02 0.77 16 33 H 0.06 0.79 8.14 -2.39 -0.02 0.77 16 34 H 0.06 0.90 8.14 -2.39 -0.02 0.88 16 35 H 0.05 0.90 8.14 -2.39 -0.02 0.88 16 36 H 0.07 0.91 8.14 -2.39 -0.02 0.89 16 37 H 0.06 0.92 8.14 -2.38 -0.02 0.90 16 38 H 0.05 1.04 8.14 -2.39 -0.02 1.02 16 39 H 0.05 1.04 8.14 -2.39 -0.02 1.02 16 40 H 0.07 1.06 8.14 -2.39 -0.02 1.05 16 41 H 0.07 1.09 8.14 -2.38 -0.02 1.07 16 42 H 0.05 1.21 6.43 -2.39 -0.02 1.20 16 43 H 0.05 1.16 8.14 -2.39 -0.02 1.14 16 44 H 0.08 1.40 8.14 -2.39 -0.02 1.38 16 45 H 0.07 1.46 8.14 -2.39 -0.02 1.44 16 46 H 0.06 1.43 8.14 -2.39 -0.02 1.41 16 47 H 0.04 1.02 7.64 -2.39 -0.02 1.00 16 48 H 0.07 1.36 8.14 -2.39 -0.02 1.34 16 49 H 0.34 10.38 6.15 -89.69 -0.55 9.83 16 50 H 0.06 2.10 8.14 -2.39 -0.02 2.08 16 51 H 0.04 1.66 8.14 -2.39 -0.02 1.64 16 52 H 0.03 1.48 4.99 -2.38 -0.01 1.47 16 53 H 0.02 0.72 8.14 -2.39 -0.02 0.70 16 54 H 0.26 14.86 8.31 -92.71 -0.77 14.09 16 55 H 0.02 1.13 7.10 -2.38 -0.02 1.11 16 56 H 0.00 -0.13 8.14 -2.39 -0.02 -0.15 16 57 H 0.03 1.61 8.14 -2.39 -0.02 1.59 16 58 H 0.04 1.47 7.71 -2.38 -0.02 1.45 16 Total: -1.00 -58.91 432.16 3.34 -55.57 By element: Atomic # 1 Polarization: 22.91 SS G_CDS: 0.10 Total: 23.01 kcal Atomic # 6 Polarization: -48.84 SS G_CDS: 3.92 Total: -44.92 kcal Atomic # 7 Polarization: -76.76 SS G_CDS: -2.58 Total: -79.33 kcal Atomic # 14 Polarization: 43.77 SS G_CDS: 1.90 Total: 45.67 kcal Total: -58.91 3.34 -55.57 kcal The number of atoms in the molecule is 58 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. ZINC001258232053.mol2 58 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 -33.711 kcal (2) G-P(sol) polarization free energy of solvation -58.914 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -92.625 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy 3.340 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -55.575 kcal (6) G-S(sol) free energy of system = (1) + (5) -89.286 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.14 seconds