Wall clock time and date at job start Sat Apr 11 2020 06:12:02 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 1.53001 * 1 3 3 C 1.53000 * 109.47281 * 2 1 4 4 N 1.46902 * 109.47221 * 179.97438 * 3 2 1 5 5 C 1.46900 * 110.99956 * 66.03930 * 4 3 2 6 6 C 1.46893 * 110.99942 * 190.00094 * 4 3 2 7 7 C 1.50697 * 109.47274 * 170.00161 * 6 4 3 8 8 O 1.21285 * 119.99770 * 359.97438 * 7 6 4 9 9 N 1.34778 * 120.00413 * 179.97438 * 7 6 4 10 10 C 1.46500 * 120.00319 * 179.97438 * 9 7 6 11 11 H 1.09002 * 110.36471 * 324.27749 * 10 9 7 12 12 C 1.54262 * 110.32117 * 86.45453 * 10 9 7 13 13 C 1.54385 * 105.14590 * 118.94932 * 12 10 9 14 14 N 1.48560 * 104.59445 * 23.80120 * 13 12 10 15 15 C 1.46903 * 110.99703 * 200.95695 * 14 13 12 16 16 C 1.50691 * 109.47328 * 290.13011 * 15 14 13 17 17 O 1.21298 * 120.00025 * 359.97438 * 16 15 14 18 18 N 1.34776 * 119.99939 * 180.02562 * 16 15 14 19 19 C 1.37109 * 119.99809 * 179.97438 * 18 16 15 20 20 H 1.07991 * 120.00109 * 359.97438 * 19 18 16 21 21 C 1.38948 * 119.99759 * 179.97438 * 19 18 16 22 22 N 1.31416 * 120.00046 * 0.02562 * 21 19 18 23 23 Si 1.86797 * 119.99916 * 179.97438 * 21 19 18 24 24 H 1.48490 * 109.47365 * 0.02562 * 23 21 19 25 25 H 1.48509 * 109.46628 * 120.00419 * 23 21 19 26 26 H 1.48493 * 109.47243 * 240.00290 * 23 21 19 27 27 C 1.48560 * 104.22462 * 320.51791 * 14 13 12 28 28 H 1.09006 * 110.40786 * 280.58928 * 27 14 13 29 29 C 1.53001 * 110.41245 * 158.26206 * 27 14 13 30 30 H 1.09005 * 109.46965 * 299.99990 * 1 2 3 31 31 H 1.08999 * 109.46990 * 60.00007 * 1 2 3 32 32 H 1.09005 * 109.47173 * 180.02562 * 1 2 3 33 33 H 1.08997 * 109.47098 * 239.99362 * 2 1 3 34 34 H 1.09008 * 109.47192 * 119.99820 * 2 1 3 35 35 H 1.09002 * 109.47100 * 59.99581 * 3 2 1 36 36 H 1.08999 * 109.47103 * 299.99924 * 3 2 1 37 37 H 1.09004 * 109.47181 * 183.95205 * 5 4 3 38 38 H 1.08990 * 109.47615 * 303.95737 * 5 4 3 39 39 H 1.09007 * 109.46870 * 63.95778 * 5 4 3 40 40 H 1.08992 * 109.47632 * 49.99681 * 6 4 3 41 41 H 1.09004 * 109.46898 * 289.99811 * 6 4 3 42 42 H 0.97001 * 119.99851 * 0.02562 * 9 7 6 43 43 H 1.09002 * 110.32521 * 0.02562 * 12 10 9 44 44 H 1.08998 * 110.32511 * 237.89601 * 12 10 9 45 45 H 1.09004 * 110.40685 * 142.58460 * 13 12 10 46 46 H 1.08997 * 110.40872 * 264.90617 * 13 12 10 47 47 H 1.09001 * 109.46906 * 50.12862 * 15 14 13 48 48 H 1.08999 * 109.46462 * 170.12609 * 15 14 13 49 49 H 0.96998 * 119.99992 * 359.97438 * 18 16 15 50 50 H 0.96997 * 120.00335 * 179.97438 * 22 21 19 51 51 H 1.09000 * 109.46721 * 61.45175 * 29 27 14 52 52 H 1.08995 * 109.46973 * 181.45002 * 29 27 14 53 53 H 1.09002 * 109.46736 * 301.45515 * 29 27 14 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 1.5300 0.0000 0.0000 3 6 2.0401 1.4425 0.0000 4 7 3.5091 1.4425 0.0006 5 6 4.0360 0.8853 -1.2523 6 6 4.0354 2.7930 0.2388 7 6 5.5216 2.7183 0.4767 8 8 6.0866 1.6454 0.4509 9 7 6.2229 3.8436 0.7182 10 6 7.6676 3.7709 0.9501 11 1 7.9184 2.8634 1.4994 12 6 8.4283 3.8127 -0.3913 13 6 9.3081 5.0791 -0.3168 14 7 9.4819 5.3292 1.1372 15 6 9.8558 6.7272 1.3899 16 6 11.2596 6.9685 0.8982 17 8 11.8872 6.0646 0.3878 18 7 11.8182 8.1883 1.0264 19 6 13.0957 8.4077 0.5794 20 1 13.6544 7.6030 0.1250 21 6 13.6713 9.6655 0.7111 22 7 12.9916 10.6445 1.2645 23 14 15.4120 9.9642 0.1028 24 1 15.9565 8.7096 -0.4754 25 1 15.3975 11.0231 -0.9383 26 1 16.2655 10.3978 1.2380 27 6 8.1520 5.0196 1.7224 28 1 7.4664 5.8533 1.5705 29 6 8.2854 4.7047 3.2137 30 1 -0.3633 0.5139 0.8900 31 1 -0.3633 0.5138 -0.8900 32 1 -0.3634 -1.0277 0.0005 33 1 1.8933 -0.5139 -0.8899 34 1 1.8934 -0.5138 0.8901 35 1 1.6767 1.9564 0.8900 36 1 1.6767 1.9563 -0.8900 37 1 5.1234 0.8320 -1.1973 38 1 3.6305 -0.1148 -1.4042 39 1 3.7453 1.5256 -2.0853 40 1 3.5486 3.2237 1.1137 41 1 3.8378 3.4187 -0.6317 42 1 5.7710 4.7016 0.7392 43 1 7.7267 3.8878 -1.2222 44 1 9.0511 2.9250 -0.5013 45 1 10.2735 4.8996 -0.7899 46 1 8.8037 5.9208 -0.7915 47 1 9.1676 7.3882 0.8631 48 1 9.8059 6.9288 2.4600 49 1 11.3164 8.9110 1.4349 50 1 13.3935 11.5225 1.3568 51 1 8.6845 5.5751 3.7345 52 1 7.3058 4.4550 3.6213 53 1 8.9609 3.8598 3.3476 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 ZINC001316797116.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 06:12:02 Heat of formation + Delta-G solvation = -60.064717 kcal Electronic energy + Delta-G solvation = -29822.692296 eV Core-core repulsion = 25729.418186 eV Total energy + Delta-G solvation = -4093.274109 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 1.28 seconds Orbital eigenvalues (eV) -40.40701 -39.18006 -37.90201 -37.28529 -34.49698 -33.81231 -33.56056 -31.49458 -31.22887 -30.92558 -28.62281 -27.35839 -26.39390 -25.24145 -24.14316 -23.49223 -21.47211 -21.10500 -20.48805 -20.08512 -19.12707 -17.88050 -17.31252 -16.78029 -16.24953 -15.89823 -15.74316 -15.42668 -15.11656 -14.82131 -14.70607 -14.46526 -14.23810 -14.02928 -13.80341 -13.68374 -13.38628 -13.20222 -13.03852 -12.65530 -12.44724 -12.24478 -12.19354 -12.07296 -11.90180 -11.79331 -11.64070 -11.47909 -11.44098 -11.33360 -11.20720 -11.13417 -10.96761 -10.80367 -10.60345 -10.34122 -10.22243 -9.88545 -9.50209 -9.16504 -8.68495 -8.52710 -8.04776 -7.94419 -6.41653 -3.82263 2.47715 2.77094 3.16375 3.27017 3.34390 3.61626 3.90541 4.03760 4.24846 4.39549 4.46335 4.57456 4.61143 4.70979 4.83000 4.87312 4.96914 5.02108 5.06249 5.10347 5.17118 5.24007 5.24363 5.26907 5.34674 5.36680 5.37747 5.47078 5.61585 5.64050 5.68800 5.73393 5.79627 5.81592 5.89773 5.90525 5.92533 6.03629 6.15704 6.22365 6.31457 6.39445 6.46234 6.54744 6.67502 7.11218 7.18082 7.34186 7.55722 8.06803 8.09775 8.62162 9.18773 9.54772 10.06781 10.76266 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.035703 B = 0.001665 C = 0.001647 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 784.055423 B =16812.152996 C =16995.303417 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.151 4.151 2 C -0.122 4.122 3 C 0.055 3.945 4 N -0.525 5.525 5 C 0.015 3.985 6 C 0.035 3.965 7 C 0.514 3.486 8 O -0.518 6.518 9 N -0.726 5.726 10 C 0.148 3.852 11 H 0.101 0.899 12 C -0.132 4.132 13 C 0.038 3.962 14 N -0.476 5.476 15 C 0.036 3.964 16 C 0.446 3.554 17 O -0.576 6.576 18 N -0.566 5.566 19 C -0.297 4.297 20 H 0.104 0.896 21 C 0.022 3.978 22 N -0.903 5.903 23 Si 0.929 3.071 24 H -0.268 1.268 25 H -0.282 1.282 26 H -0.282 1.282 27 C 0.052 3.948 28 H 0.053 0.947 29 C -0.136 4.136 30 H 0.055 0.945 31 H 0.052 0.948 32 H 0.056 0.944 33 H 0.063 0.937 34 H 0.072 0.928 35 H 0.074 0.926 36 H 0.033 0.967 37 H 0.089 0.911 38 H 0.070 0.930 39 H 0.019 0.981 40 H 0.103 0.897 41 H 0.062 0.938 42 H 0.397 0.603 43 H 0.067 0.933 44 H 0.078 0.922 45 H 0.101 0.899 46 H 0.037 0.963 47 H 0.049 0.951 48 H 0.090 0.910 49 H 0.391 0.609 50 H 0.270 0.730 51 H 0.059 0.941 52 H 0.056 0.944 53 H 0.067 0.933 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -25.316 -12.739 -0.818 28.352 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 -0.209 4.209 2 C -0.160 4.160 3 C -0.073 4.073 4 N -0.249 5.249 5 C -0.132 4.132 6 C -0.096 4.096 7 C 0.299 3.701 8 O -0.393 6.393 9 N -0.379 5.379 10 C 0.043 3.957 11 H 0.119 0.881 12 C -0.171 4.171 13 C -0.090 4.090 14 N -0.201 5.201 15 C -0.096 4.096 16 C 0.231 3.769 17 O -0.459 6.459 18 N -0.203 5.203 19 C -0.427 4.427 20 H 0.121 0.879 21 C -0.180 4.180 22 N -0.544 5.544 23 Si 0.756 3.244 24 H -0.192 1.192 25 H -0.208 1.208 26 H -0.208 1.208 27 C -0.058 4.058 28 H 0.071 0.929 29 C -0.193 4.193 30 H 0.074 0.926 31 H 0.071 0.929 32 H 0.075 0.925 33 H 0.082 0.918 34 H 0.091 0.909 35 H 0.093 0.907 36 H 0.052 0.948 37 H 0.108 0.892 38 H 0.089 0.911 39 H 0.038 0.962 40 H 0.121 0.879 41 H 0.080 0.920 42 H 0.231 0.769 43 H 0.086 0.914 44 H 0.097 0.903 45 H 0.120 0.880 46 H 0.055 0.945 47 H 0.067 0.933 48 H 0.108 0.892 49 H 0.224 0.776 50 H 0.080 0.920 51 H 0.078 0.922 52 H 0.075 0.925 53 H 0.086 0.914 Dipole moment (debyes) X Y Z Total from point charges -23.814 -14.575 -0.532 27.925 hybrid contribution -0.604 2.466 -1.000 2.729 sum -24.418 -12.109 -1.531 27.299 Atomic orbital electron populations 1.21741 0.95550 1.01878 1.01729 1.21538 0.95288 0.96139 1.03001 1.22217 0.86572 0.97742 1.00774 1.61652 1.07157 1.19682 1.36393 1.22625 1.03028 0.99454 0.88118 1.21988 0.93205 0.91709 1.02706 1.20459 0.88939 0.84065 0.76612 1.90691 1.71282 1.28180 1.49114 1.46146 1.08887 1.09456 1.73365 1.21779 0.78402 0.99324 0.96169 0.88107 1.22741 0.98394 0.99364 0.96586 1.23166 1.01053 0.95521 0.89233 1.65119 1.23773 1.21208 1.09966 1.22068 0.96762 0.88908 1.01881 1.19671 0.87951 0.83878 0.85432 1.90515 1.63961 1.43172 1.48295 1.41861 1.14876 1.09557 1.53982 1.19751 0.90029 0.96769 1.36126 0.87864 1.25247 1.00109 0.95210 0.97385 1.69619 1.37977 1.02536 1.44307 0.85809 0.81794 0.78505 0.78303 1.19213 1.20822 1.20757 1.22916 0.91298 0.95686 0.95871 0.92923 1.21711 1.01478 1.02730 0.93415 0.92637 0.92903 0.92451 0.91827 0.90939 0.90730 0.94843 0.89220 0.91137 0.96216 0.87902 0.91981 0.76885 0.91415 0.90288 0.88029 0.94496 0.93341 0.89213 0.77562 0.91975 0.92182 0.92527 0.91386 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 13. 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 -0.73 9.91 37.16 0.37 -0.36 16 2 C -0.12 -0.76 5.86 -26.73 -0.16 -0.92 16 3 C 0.05 0.36 4.96 -3.82 -0.02 0.34 16 4 N -0.52 -4.62 4.50 -244.38 -1.10 -5.72 16 5 C 0.02 0.14 9.01 60.06 0.54 0.68 16 6 C 0.04 0.27 5.45 -4.98 -0.03 0.24 16 7 C 0.51 5.39 7.55 -10.99 -0.08 5.31 16 8 O -0.52 -7.53 14.01 5.55 0.08 -7.45 16 9 N -0.73 -6.64 5.04 -52.35 -0.26 -6.91 16 10 C 0.15 1.76 2.92 -66.42 -0.19 1.56 16 11 H 0.10 1.38 7.36 -51.93 -0.38 1.00 16 12 C -0.13 -1.73 6.77 -25.34 -0.17 -1.90 16 13 C 0.04 0.60 5.80 -2.18 -0.01 0.59 16 14 N -0.48 -7.73 4.74 -223.42 -1.06 -8.79 16 15 C 0.04 0.62 5.24 -4.98 -0.03 0.59 16 16 C 0.45 10.42 7.58 -10.99 -0.08 10.33 16 17 O -0.58 -15.47 14.42 5.54 0.08 -15.39 16 18 N -0.57 -14.22 5.29 -10.97 -0.06 -14.28 16 19 C -0.30 -8.26 9.68 -14.93 -0.14 -8.40 16 20 H 0.10 3.02 7.16 -52.49 -0.38 2.65 16 21 C 0.02 0.58 5.50 -17.47 -0.10 0.49 16 22 N -0.90 -24.43 13.05 55.50 0.72 -23.71 16 23 Si 0.93 21.03 29.55 -169.99 -5.02 16.00 16 24 H -0.27 -6.08 7.11 56.52 0.40 -5.68 16 25 H -0.28 -6.28 7.11 56.52 0.40 -5.88 16 26 H -0.28 -6.29 7.11 56.52 0.40 -5.89 16 27 C 0.05 0.63 2.60 -65.95 -0.17 0.45 16 28 H 0.05 0.56 7.60 -51.93 -0.39 0.17 16 29 C -0.14 -1.54 9.34 37.16 0.35 -1.19 16 30 H 0.05 0.25 8.14 -51.93 -0.42 -0.17 16 31 H 0.05 0.24 8.14 -51.93 -0.42 -0.18 16 32 H 0.06 0.26 8.14 -51.93 -0.42 -0.16 16 33 H 0.06 0.41 6.47 -51.93 -0.34 0.07 16 34 H 0.07 0.52 8.14 -51.92 -0.42 0.10 16 35 H 0.07 0.43 7.93 -51.93 -0.41 0.02 16 36 H 0.03 0.20 8.12 -51.93 -0.42 -0.22 16 37 H 0.09 1.03 5.88 -51.93 -0.31 0.72 16 38 H 0.07 0.58 6.30 -51.93 -0.33 0.25 16 39 H 0.02 0.16 8.14 -51.92 -0.42 -0.27 16 40 H 0.10 0.57 7.93 -51.93 -0.41 0.16 16 41 H 0.06 0.38 8.12 -51.93 -0.42 -0.04 16 42 H 0.40 2.57 8.35 -40.82 -0.34 2.23 16 43 H 0.07 0.82 7.95 -51.93 -0.41 0.40 16 44 H 0.08 1.11 8.14 -51.93 -0.42 0.69 16 45 H 0.10 1.93 6.91 -51.93 -0.36 1.57 16 46 H 0.04 0.55 7.83 -51.93 -0.41 0.15 16 47 H 0.05 0.76 7.88 -51.93 -0.41 0.35 16 48 H 0.09 1.42 7.28 -51.93 -0.38 1.05 16 49 H 0.39 9.39 7.90 -40.82 -0.32 9.07 16 50 H 0.27 6.92 8.31 -40.82 -0.34 6.58 16 51 H 0.06 0.69 7.36 -51.93 -0.38 0.30 16 52 H 0.06 0.53 8.14 -51.93 -0.42 0.11 16 53 H 0.07 0.85 8.12 -51.93 -0.42 0.43 16 LS Contribution 417.86 15.07 6.30 6.30 Total: -1.00 -33.00 417.86 -9.57 -42.57 By element: Atomic # 1 Polarization: 18.87 SS G_CDS: -9.31 Total: 9.56 kcal Atomic # 6 Polarization: 7.74 SS G_CDS: 0.07 Total: 7.81 kcal Atomic # 7 Polarization: -57.65 SS G_CDS: -1.76 Total: -59.40 kcal Atomic # 8 Polarization: -23.00 SS G_CDS: 0.16 Total: -22.84 kcal Atomic # 14 Polarization: 21.03 SS G_CDS: -5.02 Total: 16.00 kcal Total LS contribution 6.30 Total: 6.30 kcal Total: -33.00 -9.57 -42.57 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. ZINC001316797116.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 -17.493 kcal (2) G-P(sol) polarization free energy of solvation -33.003 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -50.496 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.569 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.572 kcal (6) G-S(sol) free energy of system = (1) + (5) -60.065 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.28 seconds