Wall clock time and date at job start Wed Apr 1 2020 02:09:14 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 1.50702 * 1 3 3 C 1.38234 * 120.00257 * 2 1 4 4 C 1.38233 * 120.00037 * 180.25732 * 3 2 1 5 5 C 1.38238 * 119.99747 * 359.50225 * 4 3 2 6 6 C 1.38234 * 120.00083 * 0.44989 * 5 4 3 7 7 C 1.50707 * 120.00179 * 179.82916 * 6 5 4 8 8 C 1.38235 * 119.99522 * 179.97438 * 2 1 3 9 9 C 1.50700 * 120.00273 * 359.97438 * 8 2 1 10 10 C 1.50696 * 109.47492 * 89.99296 * 9 8 2 11 11 O 1.21279 * 119.99979 * 0.02562 * 10 9 8 12 12 N 1.34777 * 120.00017 * 179.97438 * 10 9 8 13 13 C 1.46501 * 119.99832 * 179.97438 * 12 10 9 14 14 H 1.09001 * 112.88824 * 26.85189 * 13 12 10 15 15 C 1.53948 * 113.66605 * 255.50131 * 13 12 10 16 16 C 1.53958 * 87.29487 * 270.26426 * 15 13 12 17 17 H 1.09001 * 113.66146 * 89.73400 * 16 15 13 18 18 N 1.46497 * 113.66456 * 220.69843 * 16 15 13 19 19 C 1.36931 * 120.00357 * 255.49811 * 18 16 15 20 20 H 1.08007 * 119.99894 * 359.97438 * 19 18 16 21 21 C 1.38813 * 120.00241 * 180.02562 * 19 18 16 22 22 N 1.31613 * 119.99856 * 359.97438 * 21 19 18 23 23 Si 1.86802 * 119.99977 * 179.97438 * 21 19 18 24 24 H 1.48493 * 109.47275 * 59.99576 * 23 21 19 25 25 H 1.48496 * 109.47266 * 180.02562 * 23 21 19 26 26 H 1.48502 * 109.46906 * 299.99752 * 23 21 19 27 27 C 1.52910 * 86.78112 * 335.26591 * 16 15 13 28 28 C 1.52904 * 121.13973 * 150.62508 * 27 16 15 29 29 C 1.53956 * 86.78557 * 100.80817 * 28 27 16 30 30 C 1.52910 * 121.13313 * 259.17913 * 27 16 15 31 31 H 1.09002 * 109.46776 * 89.99941 * 1 2 3 32 32 H 1.08993 * 109.47429 * 210.00613 * 1 2 3 33 33 H 1.08998 * 109.46961 * 330.00864 * 1 2 3 34 34 H 1.08002 * 119.99744 * 359.97115 * 3 2 1 35 35 H 1.07998 * 120.00395 * 179.72811 * 4 3 2 36 36 H 1.07999 * 119.99927 * 180.28388 * 5 4 3 37 37 H 1.08994 * 109.47170 * 269.98160 * 7 6 5 38 38 H 1.09005 * 109.46541 * 29.98305 * 7 6 5 39 39 H 1.09000 * 109.46675 * 149.97953 * 7 6 5 40 40 H 1.08999 * 109.46948 * 210.00264 * 9 8 2 41 41 H 1.09009 * 109.46815 * 329.99236 * 9 8 2 42 42 H 0.96995 * 119.99840 * 0.02562 * 12 10 9 43 43 H 1.09001 * 113.57787 * 24.86184 * 15 13 12 44 44 H 1.08996 * 113.57998 * 155.58346 * 15 13 12 45 45 H 0.97006 * 119.99594 * 75.48832 * 18 16 15 46 46 H 0.97003 * 120.00085 * 180.02562 * 22 21 19 47 47 H 1.08995 * 113.66649 * 215.28338 * 28 27 16 48 48 H 1.09009 * 113.65880 * 346.33775 * 28 27 16 49 49 H 1.08996 * 113.58249 * 270.13548 * 29 28 27 50 50 H 1.08998 * 113.57875 * 139.33836 * 29 28 27 51 51 H 1.09005 * 113.65913 * 13.66169 * 30 27 16 52 52 H 1.09003 * 113.66540 * 144.70900 * 30 27 16 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 1.5070 0.0000 0.0000 3 6 2.1982 1.1971 0.0000 4 6 3.5806 1.1971 -0.0054 5 6 4.2717 -0.0001 -0.0004 6 6 3.5805 -1.1973 0.0006 7 6 4.3339 -2.5025 0.0022 8 6 2.1981 -1.1972 0.0005 9 6 1.4445 -2.5023 0.0017 10 6 1.1926 -2.9382 -1.4186 11 8 1.5866 -2.2566 -2.3411 12 7 0.5304 -4.0862 -1.6638 13 6 0.2850 -4.5097 -3.0446 14 1 1.0286 -4.1272 -3.7439 15 6 -1.1672 -4.2946 -3.5082 16 6 -1.4676 -5.7102 -2.9828 17 1 -1.7775 -5.7325 -1.9380 18 7 -2.3516 -6.4862 -3.8560 19 6 -3.6630 -6.6742 -3.5100 20 1 -4.0457 -6.2507 -2.5930 21 6 -4.5005 -7.4100 -4.3371 22 7 -4.0342 -7.9265 -5.4543 23 14 -6.2894 -7.6670 -3.8647 24 1 -6.9653 -6.3498 -3.7499 25 1 -6.9646 -8.4813 -4.9069 26 1 -6.3603 -8.3750 -2.5612 27 6 0.0180 -6.0084 -3.1886 28 6 0.7480 -7.0291 -2.3150 29 6 0.5958 -8.0134 -3.4890 30 6 0.5065 -6.7847 -4.4121 31 1 -0.3633 0.0000 -1.0277 32 1 -0.3634 -0.8898 0.5139 33 1 -0.3633 0.8901 0.5137 34 1 1.6582 2.1324 -0.0005 35 1 4.1206 2.1323 -0.0098 36 1 5.3517 -0.0002 0.0001 37 1 4.5156 -2.8183 -1.0250 38 1 5.2863 -2.3715 0.5160 39 1 3.7447 -3.2614 0.5170 40 1 2.0338 -3.2616 0.5159 41 1 0.4923 -2.3715 0.5160 42 1 0.2156 -4.6315 -0.9260 43 1 -1.6871 -3.5075 -2.9621 44 1 -1.2702 -4.1983 -4.5890 45 1 -2.0078 -6.8668 -4.6794 46 1 -4.6195 -8.4403 -6.0325 47 1 1.7824 -6.7610 -2.1002 48 1 0.1909 -7.3208 -1.4245 49 1 -0.3232 -8.5983 -3.4513 50 1 1.4809 -8.6256 -3.6623 51 1 -0.2436 -6.8809 -5.1972 52 1 1.4730 -6.4477 -4.7868 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 ZINC001078636577.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 02:09:14 Heat of formation + Delta-G solvation = 34.891912 kcal Electronic energy + Delta-G solvation = -30205.141111 eV Core-core repulsion = 26363.689321 eV Total energy + Delta-G solvation = -3841.451791 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.13 seconds Orbital eigenvalues (eV) -40.74262 -40.04854 -38.50008 -35.00360 -34.02190 -33.73678 -33.49485 -32.19462 -29.98696 -28.90075 -26.79836 -26.76805 -25.46184 -24.60457 -24.12658 -22.44056 -21.49551 -20.83666 -20.42307 -19.88737 -17.95935 -17.29004 -16.85351 -16.43900 -16.34814 -15.75232 -15.18666 -14.83009 -14.72107 -14.54868 -14.38035 -13.90617 -13.70894 -13.42612 -13.28883 -13.08206 -13.07307 -12.82600 -12.71759 -12.53687 -12.37981 -12.02151 -11.79705 -11.75003 -11.70567 -11.56088 -11.35427 -11.02285 -10.98005 -10.88394 -10.82404 -10.61231 -10.21410 -10.13685 -9.84757 -9.79495 -9.61617 -9.40275 -8.85655 -8.69434 -8.65498 -8.62989 -6.98282 -5.81122 -3.09586 1.22865 1.27960 2.73287 3.22243 3.40878 3.45868 3.46573 3.69590 4.44710 4.55382 4.62560 4.74933 4.78257 4.81544 4.88900 4.91974 5.02827 5.07548 5.11391 5.21706 5.24434 5.27140 5.27662 5.45011 5.46593 5.50410 5.50675 5.61495 5.69026 5.69210 5.73858 5.85149 5.94975 5.99424 6.02434 6.05311 6.08653 6.10947 6.19960 6.29371 6.37131 6.41666 6.42278 6.52439 6.55161 6.56788 6.67414 6.87190 6.91455 6.93748 7.08010 7.65504 7.66922 8.36552 8.37766 9.49179 10.06757 10.41528 11.41091 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.016493 B = 0.002534 C = 0.002297 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1697.299754 B =11049.211899 C =12185.209025 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.120 4.120 2 C -0.066 4.066 3 C -0.128 4.128 4 C -0.114 4.114 5 C -0.128 4.128 6 C -0.067 4.067 7 C -0.118 4.118 8 C -0.064 4.064 9 C -0.112 4.112 10 C 0.516 3.484 11 O -0.533 6.533 12 N -0.706 5.706 13 C 0.131 3.869 14 H 0.092 0.908 15 C -0.174 4.174 16 C 0.192 3.808 17 H 0.074 0.926 18 N -0.708 5.708 19 C -0.244 4.244 20 H 0.069 0.931 21 C -0.011 4.011 22 N -0.931 5.931 23 Si 0.906 3.094 24 H -0.286 1.286 25 H -0.291 1.291 26 H -0.286 1.286 27 C -0.119 4.119 28 C -0.126 4.126 29 C -0.131 4.131 30 C -0.111 4.111 31 H 0.074 0.926 32 H 0.067 0.933 33 H 0.065 0.935 34 H 0.119 0.881 35 H 0.119 0.881 36 H 0.119 0.881 37 H 0.073 0.927 38 H 0.065 0.935 39 H 0.067 0.933 40 H 0.103 0.897 41 H 0.104 0.896 42 H 0.399 0.601 43 H 0.057 0.943 44 H 0.084 0.916 45 H 0.387 0.613 46 H 0.256 0.744 47 H 0.072 0.928 48 H 0.064 0.936 49 H 0.089 0.911 50 H 0.056 0.944 51 H 0.079 0.921 52 H 0.074 0.926 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 16.405 11.774 13.629 24.362 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 -0.176 4.176 2 C -0.066 4.066 3 C -0.146 4.146 4 C -0.132 4.132 5 C -0.146 4.146 6 C -0.068 4.068 7 C -0.175 4.175 8 C -0.064 4.064 9 C -0.151 4.151 10 C 0.302 3.698 11 O -0.409 6.409 12 N -0.356 5.356 13 C 0.026 3.974 14 H 0.110 0.890 15 C -0.217 4.217 16 C 0.080 3.920 17 H 0.091 0.909 18 N -0.348 5.348 19 C -0.375 4.375 20 H 0.087 0.913 21 C -0.207 4.207 22 N -0.579 5.579 23 Si 0.737 3.263 24 H -0.213 1.213 25 H -0.217 1.217 26 H -0.213 1.213 27 C -0.122 4.122 28 C -0.163 4.163 29 C -0.169 4.169 30 C -0.149 4.149 31 H 0.093 0.907 32 H 0.086 0.914 33 H 0.084 0.916 34 H 0.137 0.863 35 H 0.137 0.863 36 H 0.137 0.863 37 H 0.091 0.909 38 H 0.084 0.916 39 H 0.086 0.914 40 H 0.121 0.879 41 H 0.122 0.878 42 H 0.233 0.767 43 H 0.076 0.924 44 H 0.103 0.897 45 H 0.223 0.777 46 H 0.066 0.934 47 H 0.090 0.910 48 H 0.083 0.917 49 H 0.108 0.892 50 H 0.075 0.925 51 H 0.097 0.903 52 H 0.092 0.908 Dipole moment (debyes) X Y Z Total from point charges 16.478 12.213 13.004 24.285 hybrid contribution -1.079 -0.414 0.194 1.172 sum 15.399 11.799 13.198 23.464 Atomic orbital electron populations 1.20886 0.91319 1.02566 1.02857 1.19695 0.95920 0.92554 0.98398 1.20936 0.94254 0.97263 1.02127 1.21060 0.94291 0.97815 1.00062 1.20919 0.99494 0.91965 1.02272 1.19670 0.92957 0.95435 0.98693 1.20870 0.99606 0.94333 1.02664 1.18925 0.92710 0.93151 1.01653 1.20796 1.02386 0.96446 0.95494 1.20377 0.77703 0.80822 0.90872 1.90715 1.50689 1.53405 1.46054 1.45629 1.57722 1.23617 1.08610 1.21681 0.98143 0.94983 0.82626 0.88963 1.24262 0.94454 1.01187 1.01748 1.21268 0.86462 0.89660 0.94630 0.90853 1.42389 1.07299 1.60893 1.24174 1.19219 0.86386 1.27321 1.04584 0.91274 1.24737 0.98256 1.00610 0.97099 1.69639 1.35303 1.39839 1.13137 0.86287 0.85082 0.77646 0.77270 1.21271 1.21704 1.21289 1.23520 0.98852 0.91386 0.98398 1.22644 0.99399 0.96947 0.97344 1.22745 1.01922 0.96115 0.96098 1.22460 1.00542 0.95500 0.96350 0.90706 0.91378 0.91559 0.86261 0.86300 0.86312 0.90869 0.91608 0.91433 0.87894 0.87799 0.76700 0.92424 0.89719 0.77700 0.93390 0.90961 0.91733 0.89199 0.92481 0.90276 0.90788 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 -0.12 -1.17 9.61 36.01 0.35 -0.82 16 2 C -0.07 -0.74 5.88 -104.62 -0.62 -1.36 16 3 C -0.13 -1.34 9.70 -39.58 -0.38 -1.72 16 4 C -0.11 -1.13 10.05 -39.58 -0.40 -1.53 16 5 C -0.13 -1.31 9.70 -39.58 -0.38 -1.70 16 6 C -0.07 -0.74 5.88 -104.62 -0.62 -1.35 16 7 C -0.12 -1.05 9.61 36.01 0.35 -0.70 16 8 C -0.06 -0.73 4.37 -104.62 -0.46 -1.19 16 9 C -0.11 -1.10 5.01 -29.04 -0.15 -1.24 16 10 C 0.52 6.81 7.82 -10.99 -0.09 6.73 16 11 O -0.53 -9.27 15.67 5.56 0.09 -9.18 16 12 N -0.71 -8.82 5.07 -53.37 -0.27 -9.09 16 13 C 0.13 1.99 4.08 -67.48 -0.28 1.72 16 14 H 0.09 1.53 7.54 -51.93 -0.39 1.14 16 15 C -0.17 -3.09 7.68 -25.75 -0.20 -3.29 16 16 C 0.19 3.60 4.27 -67.48 -0.29 3.31 16 17 H 0.07 1.35 8.12 -51.93 -0.42 0.93 16 18 N -0.71 -16.86 5.35 -52.99 -0.28 -17.15 16 19 C -0.24 -6.53 9.98 -15.06 -0.15 -6.68 16 20 H 0.07 1.80 7.83 -52.48 -0.41 1.38 16 21 C -0.01 -0.30 5.50 -17.43 -0.10 -0.40 16 22 N -0.93 -27.40 13.06 55.49 0.72 -26.67 16 23 Si 0.91 21.95 29.55 -169.99 -5.02 16.92 16 24 H -0.29 -6.86 7.11 56.52 0.40 -6.46 16 25 H -0.29 -7.14 7.11 56.52 0.40 -6.74 16 26 H -0.29 -6.80 7.11 56.52 0.40 -6.40 16 27 C -0.12 -1.85 0.91 -154.71 -0.14 -1.99 16 28 C -0.13 -1.71 7.43 -26.28 -0.20 -1.90 16 29 C -0.13 -1.98 8.08 -25.75 -0.21 -2.19 16 30 C -0.11 -1.75 7.45 -26.28 -0.20 -1.94 16 31 H 0.07 0.83 8.14 -51.93 -0.42 0.41 16 32 H 0.07 0.59 5.95 -51.93 -0.31 0.28 16 33 H 0.07 0.53 8.09 -51.93 -0.42 0.11 16 34 H 0.12 1.01 8.06 -52.49 -0.42 0.59 16 35 H 0.12 0.89 8.06 -52.49 -0.42 0.47 16 36 H 0.12 0.96 8.06 -52.49 -0.42 0.54 16 37 H 0.07 0.73 8.14 -51.93 -0.42 0.30 16 38 H 0.06 0.47 8.09 -51.93 -0.42 0.05 16 39 H 0.07 0.52 5.95 -51.93 -0.31 0.21 16 40 H 0.10 0.78 5.95 -51.93 -0.31 0.48 16 41 H 0.10 0.84 5.95 -51.92 -0.31 0.53 16 42 H 0.40 4.11 8.54 -40.82 -0.35 3.76 16 43 H 0.06 1.02 8.14 -51.93 -0.42 0.60 16 44 H 0.08 1.63 8.14 -51.93 -0.42 1.21 16 45 H 0.39 9.78 5.87 -40.82 -0.24 9.54 16 46 H 0.26 7.35 8.31 -40.82 -0.34 7.01 16 47 H 0.07 0.88 8.14 -51.93 -0.42 0.45 16 48 H 0.06 0.86 8.14 -51.92 -0.42 0.44 16 49 H 0.09 1.59 8.14 -51.93 -0.42 1.17 16 50 H 0.06 0.75 8.14 -51.93 -0.42 0.33 16 51 H 0.08 1.44 6.43 -51.93 -0.33 1.11 16 52 H 0.07 1.05 8.14 -51.93 -0.42 0.62 16 LS Contribution 413.10 15.07 6.23 6.23 Total: -1.00 -32.01 413.10 -11.11 -43.12 By element: Atomic # 1 Polarization: 22.49 SS G_CDS: -8.43 Total: 14.06 kcal Atomic # 6 Polarization: -14.10 SS G_CDS: -4.14 Total: -18.24 kcal Atomic # 7 Polarization: -53.08 SS G_CDS: 0.17 Total: -52.91 kcal Atomic # 8 Polarization: -9.27 SS G_CDS: 0.09 Total: -9.18 kcal Atomic # 14 Polarization: 21.95 SS G_CDS: -5.02 Total: 16.92 kcal Total LS contribution 6.23 Total: 6.23 kcal Total: -32.01 -11.11 -43.12 kcal The number of atoms in the molecule is 52 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. ZINC001078636577.mol2 52 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 78.011 kcal (2) G-P(sol) polarization free energy of solvation -32.007 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 46.004 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.112 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.119 kcal (6) G-S(sol) free energy of system = (1) + (5) 34.892 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.13 seconds