Wall clock time and date at job start Sat Apr 11 2020 06:11:51 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 O 1.42897 * 1 3 3 C 1.42898 * 113.99898 * 2 1 4 4 H 1.08998 * 109.47566 * 25.12663 * 3 2 1 5 5 C 1.50707 * 109.47009 * 145.12537 * 3 2 1 6 6 O 1.21280 * 119.99705 * 36.32083 * 5 3 2 7 7 N 1.34772 * 119.99945 * 216.31813 * 5 3 2 8 8 C 1.46925 * 120.63034 * 5.01772 * 7 5 3 9 9 C 1.52770 * 109.00610 * 233.58172 * 8 7 5 10 10 C 1.53029 * 109.38547 * 305.59069 * 9 8 7 11 11 C 1.53004 * 109.46136 * 181.26131 * 10 9 8 12 12 C 1.52995 * 109.46989 * 64.92851 * 11 10 9 13 13 N 1.46504 * 109.46968 * 180.02562 * 12 11 10 14 14 C 1.36938 * 119.99852 * 180.02562 * 13 12 11 15 15 H 1.07996 * 120.00344 * 359.97438 * 14 13 12 16 16 C 1.38814 * 120.00047 * 180.02562 * 14 13 12 17 17 N 1.31620 * 119.99794 * 359.97438 * 16 14 13 18 18 Si 1.86796 * 120.00349 * 179.97438 * 16 14 13 19 19 H 1.48503 * 109.47128 * 59.99740 * 18 16 14 20 20 H 1.48502 * 109.47232 * 179.97438 * 18 16 14 21 21 H 1.48501 * 109.47230 * 300.00138 * 18 16 14 22 22 C 1.53038 * 109.54260 * 61.23852 * 10 9 8 23 23 C 1.46924 * 120.63278 * 185.29789 * 7 5 3 24 24 C 1.53004 * 109.46992 * 265.12466 * 3 2 1 25 25 H 1.08990 * 110.45620 * 52.10613 * 24 3 2 26 26 C 1.54508 * 110.50882 * 174.71147 * 24 3 2 27 27 C 1.54478 * 104.06543 * 118.64303 * 26 24 3 28 28 O 1.44425 * 104.80002 * 23.97930 * 27 26 24 29 29 C 1.44427 * 105.27645 * 319.48512 * 28 27 26 30 30 H 1.09003 * 109.47099 * 184.98948 * 1 2 3 31 31 H 1.09002 * 109.46859 * 304.98602 * 1 2 3 32 32 H 1.08998 * 109.47248 * 64.99120 * 1 2 3 33 33 H 1.09000 * 109.58625 * 353.41658 * 8 7 5 34 34 H 1.09000 * 109.58668 * 113.84944 * 8 7 5 35 35 H 1.09008 * 109.56135 * 185.54990 * 9 8 7 36 36 H 1.09002 * 109.38005 * 65.52063 * 9 8 7 37 37 H 1.08999 * 109.44808 * 301.22360 * 10 9 8 38 38 H 1.08998 * 109.47282 * 184.93171 * 11 10 9 39 39 H 1.08998 * 109.46867 * 304.92891 * 11 10 9 40 40 H 1.08998 * 109.47370 * 300.00266 * 12 11 10 41 41 H 1.08998 * 109.47284 * 60.00295 * 12 11 10 42 42 H 0.96992 * 120.00001 * 0.02562 * 13 12 11 43 43 H 0.96994 * 120.00208 * 180.02562 * 17 16 14 44 44 H 1.08995 * 109.50421 * 178.68063 * 22 10 9 45 45 H 1.09003 * 109.49456 * 58.58678 * 22 10 9 46 46 H 1.09000 * 109.58754 * 246.15961 * 23 7 5 47 47 H 1.09006 * 109.58625 * 6.43823 * 23 7 5 48 48 H 1.08998 * 110.51061 * 237.29151 * 26 24 3 49 49 H 1.09005 * 110.51093 * 359.86106 * 26 24 3 50 50 H 1.08997 * 110.37238 * 142.80461 * 27 26 24 51 51 H 1.08998 * 110.37464 * 265.14847 * 27 26 24 52 52 H 1.08993 * 110.37408 * 281.68278 * 29 28 27 53 53 H 1.08995 * 110.37114 * 159.34344 * 29 28 27 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 8 1.4290 0.0000 0.0000 3 6 2.0102 1.3054 0.0000 4 1 1.3080 2.0158 0.4363 5 6 3.2794 1.2902 0.8124 6 8 4.0019 0.3164 0.7902 7 7 3.6115 2.3588 1.5636 8 6 2.6951 3.5005 1.6877 9 6 3.4416 4.7804 1.3156 10 6 4.7083 4.8953 2.1666 11 6 5.4410 6.1923 1.8176 12 6 4.5751 7.3897 2.2140 13 7 5.2765 8.6316 1.8792 14 6 4.6918 9.8411 2.1450 15 1 3.7136 9.8795 2.6010 16 6 5.3561 11.0179 1.8274 17 7 6.5481 10.9711 1.2712 18 14 4.5583 12.6677 2.1892 19 1 4.3003 12.7837 3.6471 20 1 5.4661 13.7614 1.7591 21 1 3.2746 12.7696 1.4498 22 6 5.6236 3.7013 1.8859 23 6 4.8994 2.4068 2.2690 24 6 2.3296 1.7215 -1.4373 25 1 1.4513 1.6042 -2.0719 26 6 2.8365 3.1805 -1.4786 27 6 4.2669 3.0649 -2.0504 28 8 4.2674 1.8280 -2.7959 29 6 3.5138 0.8970 -1.9890 30 1 -0.3633 -1.0238 0.0894 31 1 -0.3633 0.5893 0.8420 32 1 -0.3634 0.4344 -0.9313 33 1 1.8484 3.3643 1.0149 34 1 2.3398 3.5738 2.7156 35 1 2.8008 5.6430 1.4986 36 1 3.7138 4.7467 0.2607 37 1 4.4368 4.9044 3.2222 38 1 6.3864 6.2325 2.3587 39 1 5.6346 6.2230 0.7453 40 1 3.6298 7.3495 1.6729 41 1 4.3816 7.3590 3.2862 42 1 6.1549 8.5972 1.4694 43 1 7.0124 11.7933 1.0495 44 1 6.5359 3.7958 2.4748 45 1 5.8753 3.6772 0.8257 46 1 4.7275 2.3890 3.3452 47 1 5.5057 1.5477 1.9817 48 1 2.2101 3.7839 -2.1356 49 1 2.8571 3.6062 -0.4753 50 1 4.4808 3.9057 -2.7102 51 1 4.9964 3.0208 -1.2417 52 1 4.1277 0.5204 -1.1709 53 1 3.1492 0.0725 -2.6016 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 ZINC001666231077.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 06:11:51 Heat of formation + Delta-G solvation = -105.840218 kcal Electronic energy + Delta-G solvation = -31983.305622 eV Core-core repulsion = 27855.753787 eV Total energy + Delta-G solvation = -4127.551835 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.80 seconds Orbital eigenvalues (eV) -41.42695 -39.20507 -38.36241 -37.58622 -35.45083 -33.82862 -33.21882 -31.46862 -31.11535 -29.88534 -28.58972 -27.70726 -26.22970 -24.92902 -23.56629 -23.29557 -22.81538 -21.88833 -20.85059 -20.10918 -19.25002 -17.94747 -17.56369 -17.04568 -16.63314 -16.29073 -15.93296 -15.39726 -15.03310 -14.97453 -14.92576 -14.76600 -14.64062 -14.39029 -13.92483 -13.80562 -13.54830 -13.45688 -13.18935 -12.94552 -12.74822 -12.50508 -12.37882 -12.30214 -11.85421 -11.59967 -11.45942 -11.42351 -11.25984 -11.17192 -11.07747 -11.02079 -10.80595 -10.68811 -10.40762 -10.35301 -10.20269 -9.99601 -9.94866 -9.69885 -9.57282 -8.90617 -8.86740 -6.93838 -5.78510 -3.07308 2.18765 2.42715 3.37759 3.41626 3.45960 3.47325 3.77646 4.00968 4.08675 4.35344 4.46004 4.52347 4.54710 4.63068 4.68685 4.71347 4.82058 4.86429 4.90410 4.94961 5.03505 5.08518 5.12521 5.18114 5.25075 5.28761 5.37172 5.50772 5.54336 5.57452 5.60786 5.61841 5.67429 5.70003 5.73669 5.75849 5.82572 5.95529 5.95999 6.08319 6.25458 6.29430 6.36355 6.38935 6.54096 6.61616 6.82028 6.87062 7.05272 7.66397 7.83863 8.40710 9.51374 10.10458 10.44364 11.44416 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.016694 B = 0.002458 C = 0.002415 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1676.887526 B =11389.886654 C =11590.944367 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.026 3.974 2 O -0.359 6.359 3 C 0.076 3.924 4 H 0.088 0.912 5 C 0.520 3.480 6 O -0.518 6.518 7 N -0.605 5.605 8 C 0.095 3.905 9 C -0.142 4.142 10 C -0.081 4.081 11 C -0.121 4.121 12 C 0.153 3.847 13 N -0.735 5.735 14 C -0.241 4.241 15 H 0.069 0.931 16 C -0.014 4.014 17 N -0.934 5.934 18 Si 0.907 3.093 19 H -0.286 1.286 20 H -0.291 1.291 21 H -0.286 1.286 22 C -0.130 4.130 23 C 0.112 3.888 24 C -0.134 4.134 25 H 0.096 0.904 26 C -0.176 4.176 27 C 0.047 3.953 28 O -0.375 6.375 29 C 0.038 3.962 30 H 0.092 0.908 31 H 0.045 0.955 32 H 0.045 0.955 33 H 0.084 0.916 34 H 0.077 0.923 35 H 0.089 0.911 36 H 0.075 0.925 37 H 0.074 0.926 38 H 0.063 0.937 39 H 0.061 0.939 40 H 0.018 0.982 41 H 0.015 0.985 42 H 0.383 0.617 43 H 0.256 0.744 44 H 0.079 0.921 45 H 0.067 0.933 46 H 0.070 0.930 47 H 0.091 0.909 48 H 0.084 0.916 49 H 0.099 0.901 50 H 0.094 0.906 51 H 0.059 0.941 52 H 0.088 0.912 53 H 0.091 0.909 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -11.616 -22.249 -2.090 25.185 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 -0.071 4.071 2 O -0.277 6.277 3 C 0.015 3.985 4 H 0.106 0.894 5 C 0.307 3.693 6 O -0.394 6.394 7 N -0.340 5.340 8 C -0.027 4.027 9 C -0.180 4.180 10 C -0.100 4.100 11 C -0.159 4.159 12 C 0.026 3.974 13 N -0.379 5.379 14 C -0.372 4.372 15 H 0.087 0.913 16 C -0.210 4.210 17 N -0.583 5.583 18 Si 0.738 3.262 19 H -0.213 1.213 20 H -0.217 1.217 21 H -0.213 1.213 22 C -0.168 4.168 23 C -0.010 4.010 24 C -0.153 4.153 25 H 0.115 0.885 26 C -0.213 4.213 27 C -0.030 4.030 28 O -0.294 6.294 29 C -0.039 4.039 30 H 0.111 0.889 31 H 0.064 0.936 32 H 0.064 0.936 33 H 0.102 0.898 34 H 0.095 0.905 35 H 0.107 0.893 36 H 0.094 0.906 37 H 0.092 0.908 38 H 0.082 0.918 39 H 0.080 0.920 40 H 0.036 0.964 41 H 0.033 0.967 42 H 0.217 0.783 43 H 0.066 0.934 44 H 0.097 0.903 45 H 0.085 0.915 46 H 0.088 0.912 47 H 0.110 0.890 48 H 0.102 0.898 49 H 0.117 0.883 50 H 0.113 0.887 51 H 0.077 0.923 52 H 0.106 0.894 53 H 0.109 0.891 Dipole moment (debyes) X Y Z Total from point charges -11.130 -22.870 -2.255 25.534 hybrid contribution -0.601 1.411 0.255 1.555 sum -11.732 -21.458 -2.000 24.538 Atomic orbital electron populations 1.22958 0.80349 1.03436 1.00320 1.88038 1.19893 1.24903 1.94851 1.22184 0.94344 0.86931 0.95062 0.89411 1.20257 0.87332 0.82641 0.79103 1.90666 1.52733 1.32554 1.63431 1.48144 1.19536 1.17896 1.48448 1.21966 0.92321 0.85924 1.02528 1.22211 0.97998 0.96757 1.01043 1.21067 0.94488 0.94566 0.99867 1.21765 0.99227 0.93352 1.01565 1.20687 0.94217 0.85778 0.96739 1.42377 1.20738 1.00274 1.74465 1.19178 1.00423 0.84012 1.33581 0.91314 1.24750 0.96828 0.97775 1.01680 1.69646 1.13693 1.26894 1.48019 0.86271 0.78200 0.83829 0.77901 1.21277 1.21658 1.21269 1.22016 0.98747 0.93593 1.02478 1.21678 0.83735 0.99331 0.96223 1.22895 1.01302 0.95997 0.95115 0.88528 1.23496 0.97850 0.95683 1.04319 1.23375 0.95614 0.87950 0.96074 1.89118 1.74761 1.21763 1.43749 1.23786 0.91379 0.92414 0.96313 0.88936 0.93636 0.93589 0.89790 0.90456 0.89253 0.90617 0.90810 0.91788 0.91983 0.96397 0.96680 0.78339 0.93436 0.90258 0.91469 0.91186 0.89017 0.89768 0.88308 0.88735 0.92255 0.89385 0.89093 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 0.03 0.16 10.87 101.05 1.10 1.26 16 2 O -0.36 -3.65 10.04 -51.86 -0.52 -4.17 16 3 C 0.08 0.70 1.97 -27.88 -0.06 0.64 16 4 H 0.09 0.59 5.16 -51.93 -0.27 0.32 16 5 C 0.52 5.95 5.61 -10.98 -0.06 5.89 16 6 O -0.52 -7.76 14.13 -11.07 -0.16 -7.91 16 7 N -0.61 -5.80 2.83 -173.02 -0.49 -6.29 16 8 C 0.09 0.73 5.22 -3.93 -0.02 0.71 16 9 C -0.14 -1.32 4.71 -26.83 -0.13 -1.45 16 10 C -0.08 -0.86 2.15 -90.58 -0.19 -1.05 16 11 C -0.12 -1.75 4.80 -26.73 -0.13 -1.88 16 12 C 0.15 2.87 6.02 -4.04 -0.02 2.84 16 13 N -0.73 -18.28 5.60 -59.91 -0.34 -18.61 16 14 C -0.24 -6.66 9.99 -15.06 -0.15 -6.81 16 15 H 0.07 1.83 7.83 -52.49 -0.41 1.42 16 16 C -0.01 -0.41 5.50 -17.43 -0.10 -0.51 16 17 N -0.93 -28.13 13.06 55.49 0.72 -27.41 16 18 Si 0.91 22.15 29.55 -169.99 -5.02 17.13 16 19 H -0.29 -6.86 7.11 56.52 0.40 -6.46 16 20 H -0.29 -7.16 7.11 56.52 0.40 -6.76 16 21 H -0.29 -6.84 7.11 56.52 0.40 -6.44 16 22 C -0.13 -1.27 5.36 -26.61 -0.14 -1.41 16 23 C 0.11 1.08 6.42 -3.71 -0.02 1.05 16 24 C -0.13 -1.22 3.20 -89.05 -0.28 -1.51 16 25 H 0.10 0.75 8.14 -51.93 -0.42 0.33 16 26 C -0.18 -1.54 6.15 -25.16 -0.15 -1.70 16 27 C 0.05 0.50 7.63 37.93 0.29 0.79 16 28 O -0.38 -4.89 11.65 -35.23 -0.41 -5.30 16 29 C 0.04 0.44 6.92 37.93 0.26 0.70 16 30 H 0.09 0.46 8.14 -51.93 -0.42 0.04 16 31 H 0.05 0.22 7.98 -51.93 -0.41 -0.19 16 32 H 0.05 0.22 8.14 -51.93 -0.42 -0.20 16 33 H 0.08 0.51 4.38 -51.93 -0.23 0.28 16 34 H 0.08 0.53 8.14 -51.93 -0.42 0.10 16 35 H 0.09 0.87 6.50 -51.92 -0.34 0.53 16 36 H 0.08 0.73 6.03 -51.93 -0.31 0.41 16 37 H 0.07 0.77 8.14 -51.93 -0.42 0.35 16 38 H 0.06 0.97 8.14 -51.93 -0.42 0.55 16 39 H 0.06 0.93 8.14 -51.93 -0.42 0.51 16 40 H 0.02 0.33 6.53 -51.93 -0.34 -0.01 16 41 H 0.02 0.29 8.14 -51.93 -0.42 -0.13 16 42 H 0.38 10.08 7.67 -40.82 -0.31 9.77 16 43 H 0.26 7.46 8.31 -40.82 -0.34 7.12 16 44 H 0.08 0.74 8.14 -51.93 -0.42 0.31 16 45 H 0.07 0.70 7.92 -51.93 -0.41 0.29 16 46 H 0.07 0.60 8.14 -51.93 -0.42 0.18 16 47 H 0.09 0.99 7.04 -51.93 -0.37 0.63 16 48 H 0.08 0.65 8.14 -51.93 -0.42 0.23 16 49 H 0.10 0.80 1.68 -51.93 -0.09 0.72 16 50 H 0.09 0.94 8.14 -51.93 -0.42 0.52 16 51 H 0.06 0.67 7.92 -51.93 -0.41 0.26 16 52 H 0.09 1.21 4.86 -51.93 -0.25 0.96 16 53 H 0.09 0.98 8.14 -51.93 -0.42 0.56 16 LS Contribution 396.35 15.07 5.97 5.97 Total: -1.00 -33.97 396.35 -8.83 -42.81 By element: Atomic # 1 Polarization: 14.99 SS G_CDS: -8.78 Total: 6.20 kcal Atomic # 6 Polarization: -2.61 SS G_CDS: 0.19 Total: -2.43 kcal Atomic # 7 Polarization: -52.21 SS G_CDS: -0.10 Total: -52.31 kcal Atomic # 8 Polarization: -16.29 SS G_CDS: -1.09 Total: -17.38 kcal Atomic # 14 Polarization: 22.15 SS G_CDS: -5.02 Total: 17.13 kcal Total LS contribution 5.97 Total: 5.97 kcal Total: -33.97 -8.83 -42.81 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. ZINC001666231077.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 -63.031 kcal (2) G-P(sol) polarization free energy of solvation -33.975 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -97.006 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.835 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.809 kcal (6) G-S(sol) free energy of system = (1) + (5) -105.840 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds