Wall clock time and date at job start Tue Mar 31 2020 21:21:24 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 1.52991 * 1 3 3 C 1.53000 * 109.47137 * 2 1 4 4 H 1.08998 * 109.89731 * 305.93291 * 3 2 1 5 5 C 1.54380 * 109.82941 * 185.00080 * 3 2 1 6 6 C 1.55308 * 102.25196 * 219.13227 * 5 3 2 7 7 C 1.54945 * 100.94438 * 34.13704 * 6 5 3 8 8 H 1.09001 * 110.31225 * 82.56302 * 7 6 5 9 9 C 1.50692 * 110.30946 * 204.64374 * 7 6 5 10 10 O 1.21284 * 120.00565 * 114.99421 * 9 7 6 11 11 N 1.34780 * 119.99753 * 294.99234 * 9 7 6 12 12 C 1.46942 * 120.56345 * 180.02562 * 11 9 7 13 13 C 1.53314 * 108.70180 * 125.78135 * 12 11 9 14 14 C 1.52274 * 109.41627 * 53.51929 * 13 12 11 15 15 C 1.54820 * 110.17120 * 177.60871 * 14 13 12 16 16 C 1.55024 * 101.63423 * 276.30346 * 15 14 13 17 17 N 1.47476 * 104.90576 * 323.72550 * 16 15 14 18 18 C 1.36933 * 125.66369 * 203.99613 * 17 16 15 19 19 H 1.08001 * 119.99821 * 170.02064 * 18 17 16 20 20 C 1.38804 * 120.00130 * 350.02067 * 18 17 16 21 21 N 1.31624 * 119.99828 * 350.40490 * 20 18 17 22 22 Si 1.86802 * 120.00065 * 170.40864 * 20 18 17 23 23 H 1.48497 * 109.47055 * 94.14279 * 22 20 18 24 24 H 1.48504 * 109.46905 * 214.14083 * 22 20 18 25 25 H 1.48500 * 109.47165 * 334.14048 * 22 20 18 26 26 C 1.47186 * 108.67328 * 24.01341 * 17 16 15 27 27 C 1.52273 * 111.27208 * 300.36089 * 14 13 12 28 28 C 1.46921 * 120.56766 * 0.02593 * 11 9 7 29 29 O 1.43233 * 109.82944 * 66.87032 * 3 2 1 30 30 H 1.09000 * 109.47186 * 299.99500 * 1 2 3 31 31 H 1.09008 * 109.47686 * 59.99621 * 1 2 3 32 32 H 1.09006 * 109.47495 * 179.97438 * 1 2 3 33 33 H 1.09003 * 109.46719 * 240.00297 * 2 1 3 34 34 H 1.08996 * 109.47403 * 120.00680 * 2 1 3 35 35 H 1.08998 * 110.85009 * 100.94256 * 5 3 2 36 36 H 1.08998 * 111.02423 * 337.39948 * 5 3 2 37 37 H 1.09000 * 111.12392 * 276.21150 * 6 5 3 38 38 H 1.09004 * 111.15779 * 152.06838 * 6 5 3 39 39 H 1.09000 * 109.59778 * 6.01618 * 12 11 9 40 40 H 1.08998 * 109.59274 * 245.55048 * 12 11 9 41 41 H 1.08998 * 109.48204 * 293.53446 * 13 12 11 42 42 H 1.08999 * 109.48365 * 173.50968 * 13 12 11 43 43 H 1.08996 * 110.87234 * 158.24725 * 15 14 13 44 44 H 1.09000 * 111.08928 * 34.45389 * 15 14 13 45 45 H 1.09000 * 110.35517 * 204.86484 * 16 15 14 46 46 H 1.09007 * 110.44052 * 82.62682 * 16 15 14 47 47 H 0.96999 * 119.99584 * 179.97438 * 21 20 18 48 48 H 1.09002 * 109.90625 * 117.86975 * 26 17 16 49 49 H 1.09000 * 109.90797 * 238.93653 * 26 17 16 50 50 H 1.09004 * 109.48059 * 179.62492 * 27 14 13 51 51 H 1.09003 * 109.47699 * 299.65255 * 27 14 13 52 52 H 1.09008 * 109.59623 * 353.98038 * 28 11 9 53 53 H 1.09002 * 109.59995 * 114.44571 * 28 11 9 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 2.0399 1.4425 0.0000 4 1 1.5965 1.9927 -0.8299 5 6 3.5785 1.4540 -0.1266 6 6 3.9797 2.6053 0.8354 7 6 2.8994 2.4588 1.9364 8 1 3.1872 1.6852 2.6484 9 6 2.6946 3.7721 2.6463 10 8 1.6307 4.3482 2.5611 11 7 3.6937 4.3066 3.3761 12 6 3.5074 5.5862 4.0740 13 6 3.8521 5.3931 5.5553 14 6 5.2440 4.7874 5.6764 15 6 5.6344 4.6403 7.1673 16 6 6.1700 6.0584 7.4916 17 7 6.8625 6.4923 6.2639 18 6 7.8591 7.4291 6.1981 19 1 8.4142 7.5634 5.2814 20 6 8.1560 8.2059 7.3094 21 7 7.3648 8.1797 8.3610 22 14 9.6782 9.2887 7.3125 23 1 9.3121 10.6585 6.8713 24 1 10.2427 9.3451 8.6849 25 1 10.6898 8.7233 6.3840 26 6 6.3043 5.7515 5.1211 27 6 5.3231 3.4396 4.9722 28 6 4.9877 3.6197 3.4875 29 8 1.7029 2.0770 1.2391 30 1 -0.3633 0.5138 0.8900 31 1 -0.3635 0.5139 -0.8900 32 1 -0.3634 -1.0277 -0.0005 33 1 1.8932 -0.5138 -0.8901 34 1 1.8933 -0.5139 0.8899 35 1 3.8819 1.6792 -1.1490 36 1 4.0051 0.5067 0.2031 37 1 3.9076 3.5738 0.3405 38 1 4.9788 2.4482 1.2420 39 1 2.4700 5.9069 3.9788 40 1 4.1662 6.3384 3.6402 41 1 3.1236 4.7245 6.0139 42 1 3.8300 6.3576 6.0625 43 1 6.4148 3.8897 7.2921 44 1 4.7642 4.4019 7.7789 45 1 6.8690 6.0179 8.3270 46 1 5.3455 6.7337 7.7205 47 1 7.5724 8.7223 9.1377 48 1 5.8433 6.4456 4.4184 49 1 7.0934 5.1884 4.6227 50 1 6.3310 3.0364 5.0711 51 1 4.6099 2.7506 5.4248 52 1 4.9262 2.6438 3.0057 53 1 5.7620 4.2186 3.0080 RHF calculation, no. of doubly occupied orbitals= 65 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 ZINC001035189414.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 21:21:24 Heat of formation + Delta-G solvation = -61.813567 kcal Electronic energy + Delta-G solvation = -30852.089952 eV Core-core repulsion = 26916.903308 eV Total energy + Delta-G solvation = -3935.186644 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 1.73 seconds Orbital eigenvalues (eV) -40.88372 -39.61433 -38.21483 -35.77972 -33.91575 -33.24339 -32.46452 -31.18398 -30.77553 -29.20249 -28.53682 -26.16154 -25.09606 -24.33702 -23.10807 -22.56066 -21.97530 -21.17161 -20.20432 -19.75188 -18.22093 -17.45989 -16.80084 -16.65526 -16.08646 -15.87801 -15.06108 -14.95509 -14.65845 -14.52761 -14.24910 -13.92783 -13.84775 -13.53142 -13.45710 -13.32318 -13.24807 -12.75487 -12.49131 -12.25311 -12.22541 -12.13585 -12.00318 -11.77074 -11.57359 -11.29078 -11.21210 -11.15121 -11.05779 -11.00698 -10.93058 -10.80995 -10.67484 -10.18473 -10.12487 -9.98241 -9.78735 -9.72215 -9.60753 -9.37564 -8.57579 -8.51406 -6.78385 -5.74696 -3.06581 2.55119 2.75282 3.38643 3.44466 3.46281 3.61113 4.03066 4.26304 4.32159 4.49264 4.64163 4.71256 4.76353 4.82214 4.88491 4.95381 5.04561 5.07826 5.11268 5.22171 5.30323 5.36677 5.39270 5.44638 5.48689 5.50778 5.55056 5.57917 5.64930 5.68154 5.70621 5.82611 5.89801 5.91492 5.92819 6.03991 6.05444 6.14242 6.24184 6.31975 6.35758 6.54497 6.59273 6.70587 6.74714 6.77812 6.95250 7.40850 7.51321 7.59582 7.78835 8.17965 8.26765 9.19868 9.82138 10.50480 11.38365 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.027711 B = 0.002392 C = 0.002339 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1010.180134 B =11701.190743 C =11965.856318 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 -0.132 4.132 3 C 0.076 3.924 4 H 0.082 0.918 5 C -0.150 4.150 6 C -0.149 4.149 7 C 0.066 3.934 8 H 0.095 0.905 9 C 0.514 3.486 10 O -0.528 6.528 11 N -0.603 5.603 12 C 0.112 3.888 13 C -0.113 4.113 14 C -0.069 4.069 15 C -0.137 4.137 16 C 0.174 3.826 17 N -0.602 5.602 18 C -0.228 4.228 19 H 0.074 0.926 20 C -0.008 4.008 21 N -0.918 5.918 22 Si 0.909 3.091 23 H -0.289 1.289 24 H -0.290 1.290 25 H -0.281 1.281 26 C 0.146 3.854 27 C -0.117 4.117 28 C 0.101 3.899 29 O -0.346 6.346 30 H 0.063 0.937 31 H 0.052 0.948 32 H 0.052 0.948 33 H 0.071 0.929 34 H 0.067 0.933 35 H 0.085 0.915 36 H 0.082 0.918 37 H 0.085 0.915 38 H 0.096 0.904 39 H 0.089 0.911 40 H 0.074 0.926 41 H 0.060 0.940 42 H 0.083 0.917 43 H 0.059 0.941 44 H 0.058 0.942 45 H 0.065 0.935 46 H 0.026 0.974 47 H 0.252 0.748 48 H 0.022 0.978 49 H 0.021 0.979 50 H 0.077 0.923 51 H 0.064 0.936 52 H 0.081 0.919 53 H 0.076 0.924 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -7.755 -17.525 -15.072 24.381 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 -0.208 4.208 2 C -0.170 4.170 3 C 0.018 3.982 4 H 0.100 0.900 5 C -0.188 4.188 6 C -0.187 4.187 7 C 0.005 3.995 8 H 0.112 0.888 9 C 0.300 3.700 10 O -0.403 6.403 11 N -0.338 5.338 12 C -0.010 4.010 13 C -0.151 4.151 14 C -0.070 4.070 15 C -0.176 4.176 16 C 0.050 3.950 17 N -0.328 5.328 18 C -0.356 4.356 19 H 0.092 0.908 20 C -0.204 4.204 21 N -0.565 5.565 22 Si 0.739 3.261 23 H -0.217 1.217 24 H -0.217 1.217 25 H -0.207 1.207 26 C 0.020 3.980 27 C -0.155 4.155 28 C -0.021 4.021 29 O -0.264 6.264 30 H 0.082 0.918 31 H 0.071 0.929 32 H 0.071 0.929 33 H 0.090 0.910 34 H 0.086 0.914 35 H 0.104 0.896 36 H 0.101 0.899 37 H 0.104 0.896 38 H 0.114 0.886 39 H 0.107 0.893 40 H 0.093 0.907 41 H 0.079 0.921 42 H 0.102 0.898 43 H 0.078 0.922 44 H 0.077 0.923 45 H 0.084 0.916 46 H 0.044 0.956 47 H 0.062 0.938 48 H 0.040 0.960 49 H 0.038 0.962 50 H 0.096 0.904 51 H 0.082 0.918 52 H 0.099 0.901 53 H 0.094 0.906 Dipole moment (debyes) X Y Z Total from point charges -8.453 -17.019 -14.917 24.158 hybrid contribution 1.114 0.588 0.077 1.262 sum -7.339 -16.431 -14.841 23.326 Atomic orbital electron populations 1.21715 0.95180 1.01362 1.02531 1.21902 0.97170 0.95528 1.02359 1.22881 0.94257 0.93649 0.87372 0.90047 1.23195 0.95289 0.99250 1.01025 1.23390 0.99118 1.00377 0.95813 1.22781 0.86483 0.94894 0.95353 0.88777 1.20364 0.83839 0.86461 0.79312 1.90701 1.25632 1.62284 1.61698 1.48061 1.13163 1.23209 1.49323 1.21755 1.02871 0.84076 0.92265 1.21732 0.95913 1.02302 0.95130 1.21013 0.95077 0.94202 0.96716 1.23062 0.99682 1.00869 0.93939 1.21396 0.95360 0.88005 0.90284 1.44519 1.41672 1.45260 1.01360 1.18990 1.07675 1.10784 0.98184 0.90789 1.24808 0.99155 0.99275 0.97188 1.69962 1.37080 1.43439 1.05988 0.86159 0.82686 0.80367 0.76873 1.21657 1.21657 1.20667 1.21339 0.92703 0.92593 0.91373 1.21808 1.02039 0.97631 0.94026 1.22005 0.84977 0.97141 0.98021 1.88567 1.27302 1.77864 1.32662 0.91805 0.92872 0.92939 0.91021 0.91430 0.89606 0.89949 0.89643 0.88579 0.89284 0.90735 0.92128 0.89802 0.92228 0.92316 0.91625 0.95613 0.93755 0.95986 0.96164 0.90422 0.91769 0.90097 0.90587 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. 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 -1.17 9.83 37.15 0.37 -0.81 16 2 C -0.13 -0.94 5.51 -26.74 -0.15 -1.09 16 3 C 0.08 0.65 3.51 -26.01 -0.09 0.56 16 4 H 0.08 0.70 8.14 -51.93 -0.42 0.28 16 5 C -0.15 -0.95 6.54 -24.78 -0.16 -1.12 16 6 C -0.15 -1.17 5.73 -24.48 -0.14 -1.31 16 7 C 0.07 0.71 2.92 -26.86 -0.08 0.63 16 8 H 0.09 0.86 7.58 -51.93 -0.39 0.47 16 9 C 0.51 7.31 7.12 -10.99 -0.08 7.24 16 10 O -0.53 -9.76 15.95 -13.80 -0.22 -9.98 16 11 N -0.60 -7.88 2.96 -172.63 -0.51 -8.39 16 12 C 0.11 1.65 6.14 -3.64 -0.02 1.63 16 13 C -0.11 -1.74 4.78 -26.94 -0.13 -1.87 16 14 C -0.07 -1.10 0.54 -153.93 -0.08 -1.18 16 15 C -0.14 -2.44 6.00 -24.70 -0.15 -2.59 16 16 C 0.17 4.09 5.11 -2.44 -0.01 4.08 16 17 N -0.60 -14.89 3.40 -170.22 -0.58 -15.47 16 18 C -0.23 -6.25 10.24 -15.06 -0.15 -6.40 16 19 H 0.07 1.97 7.85 -52.49 -0.41 1.56 16 20 C -0.01 -0.21 5.40 -17.43 -0.09 -0.31 16 21 N -0.92 -26.72 10.68 55.49 0.59 -26.13 16 22 Si 0.91 21.88 29.56 -169.99 -5.03 16.86 16 23 H -0.29 -6.98 7.11 56.52 0.40 -6.58 16 24 H -0.29 -7.05 7.11 56.52 0.40 -6.65 16 25 H -0.28 -6.59 7.11 56.52 0.40 -6.19 16 26 C 0.15 2.84 5.43 -3.31 -0.02 2.82 16 27 C -0.12 -1.42 4.71 -26.96 -0.13 -1.55 16 28 C 0.10 1.08 5.29 -3.67 -0.02 1.06 16 29 O -0.35 -4.29 9.90 -54.58 -0.54 -4.83 16 30 H 0.06 0.62 7.90 -51.93 -0.41 0.21 16 31 H 0.05 0.39 8.14 -51.92 -0.42 -0.03 16 32 H 0.05 0.34 8.14 -51.93 -0.42 -0.08 16 33 H 0.07 0.39 8.14 -51.93 -0.42 -0.04 16 34 H 0.07 0.49 8.14 -51.93 -0.42 0.06 16 35 H 0.09 0.44 8.14 -51.93 -0.42 0.01 16 36 H 0.08 0.42 7.86 -51.93 -0.41 0.01 16 37 H 0.08 0.76 8.05 -51.93 -0.42 0.34 16 38 H 0.10 0.58 6.35 -51.93 -0.33 0.25 16 39 H 0.09 1.39 7.00 -51.93 -0.36 1.03 16 40 H 0.07 1.13 6.53 -51.93 -0.34 0.79 16 41 H 0.06 0.90 8.14 -51.93 -0.42 0.48 16 42 H 0.08 1.47 7.51 -51.93 -0.39 1.08 16 43 H 0.06 1.03 8.02 -51.93 -0.42 0.61 16 44 H 0.06 0.95 8.01 -51.93 -0.42 0.54 16 45 H 0.07 1.73 6.94 -51.93 -0.36 1.37 16 46 H 0.03 0.66 7.71 -51.92 -0.40 0.26 16 47 H 0.25 7.14 8.31 -40.82 -0.34 6.81 16 48 H 0.02 0.44 6.07 -51.93 -0.32 0.13 16 49 H 0.02 0.39 7.58 -51.93 -0.39 -0.01 16 50 H 0.08 0.91 8.11 -51.93 -0.42 0.49 16 51 H 0.06 0.74 8.14 -51.93 -0.42 0.32 16 52 H 0.08 0.63 4.40 -51.92 -0.23 0.40 16 53 H 0.08 0.82 7.47 -51.93 -0.39 0.43 16 LS Contribution 392.93 15.07 5.92 5.92 Total: -1.00 -33.07 392.93 -10.82 -43.89 By element: Atomic # 1 Polarization: 7.66 SS G_CDS: -9.32 Total: -1.66 kcal Atomic # 6 Polarization: 0.92 SS G_CDS: -1.14 Total: -0.22 kcal Atomic # 7 Polarization: -49.48 SS G_CDS: -0.50 Total: -49.98 kcal Atomic # 8 Polarization: -14.05 SS G_CDS: -0.76 Total: -14.81 kcal Atomic # 14 Polarization: 21.88 SS G_CDS: -5.03 Total: 16.86 kcal Total LS contribution 5.92 Total: 5.92 kcal Total: -33.07 -10.82 -43.89 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. ZINC001035189414.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 -17.921 kcal (2) G-P(sol) polarization free energy of solvation -33.072 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -50.993 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.821 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.893 kcal (6) G-S(sol) free energy of system = (1) + (5) -61.814 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.73 seconds