Wall clock time and date at job start Tue Mar 9 2021 13:09:39 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= 0 * 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 N 1.46499 * 1 3 3 C 1.37634 * 125.68004 * 2 1 4 4 C 1.46672 * 126.22811 * 0.02562 * 3 2 1 5 5 O 1.21694 * 119.99667 * 351.55087 * 4 3 2 6 6 N 1.34772 * 120.00484 * 171.55424 * 4 3 2 7 7 C 1.46500 * 120.00316 * 173.63926 * 6 4 3 8 8 C 1.50695 * 109.47054 * 89.99514 * 7 6 4 9 9 C 1.38240 * 120.00261 * 269.72651 * 8 7 6 10 10 C 1.38232 * 119.99712 * 179.77051 * 9 8 7 11 11 C 1.38232 * 120.00458 * 0.48398 * 10 9 8 12 12 C 1.38240 * 119.99860 * 359.79014 * 11 10 9 13 13 C 1.38230 * 119.99779 * 359.96167 * 12 11 10 14 14 C 1.46499 * 119.99902 * 353.63448 * 6 4 3 15 15 Si 1.86296 * 109.47114 * 95.03157 * 14 6 4 16 16 C 1.86297 * 109.47168 * 74.51478 * 15 14 6 17 17 C 1.86305 * 109.47344 * 194.51490 * 15 14 6 18 18 C 1.86304 * 109.47335 * 314.51361 * 15 14 6 19 19 C 1.37885 * 107.54899 * 180.27919 * 3 2 1 20 20 C 1.39878 * 107.09224 * 359.76404 * 19 3 2 21 21 Br 1.89103 * 126.07307 * 179.97438 * 20 19 3 22 22 C 1.35496 * 107.85317 * 0.02562 * 20 19 3 23 23 C 1.50701 * 125.57386 * 179.97438 * 22 20 19 24 24 O 1.42894 * 109.47303 * 306.34487 * 23 22 20 25 25 Si 1.86302 * 109.46803 * 66.34156 * 23 22 20 26 26 H 1.48498 * 109.47386 * 303.58123 * 25 23 22 27 27 H 1.48499 * 109.47277 * 63.58489 * 25 23 22 28 28 H 1.48507 * 109.46915 * 183.58277 * 25 23 22 29 29 H 1.09005 * 109.46979 * 275.28661 * 1 2 3 30 30 H 1.08997 * 109.46889 * 35.28030 * 1 2 3 31 31 H 1.08995 * 109.47785 * 155.28457 * 1 2 3 32 32 H 1.08995 * 109.46982 * 209.99812 * 7 6 4 33 33 H 1.08998 * 109.46786 * 329.99457 * 7 6 4 34 34 H 1.08002 * 119.99585 * 0.02562 * 9 8 7 35 35 H 1.08009 * 119.99654 * 180.25493 * 10 9 8 36 36 H 1.07997 * 120.00564 * 179.77115 * 11 10 9 37 37 H 1.07994 * 120.00012 * 179.97438 * 12 11 10 38 38 H 1.08006 * 120.00170 * 180.02562 * 13 12 11 39 39 H 1.08996 * 109.47426 * 215.03459 * 14 6 4 40 40 H 1.09001 * 109.47217 * 335.03342 * 14 6 4 41 41 H 1.09005 * 109.47308 * 59.99827 * 16 15 14 42 42 H 1.09006 * 109.47500 * 180.02562 * 16 15 14 43 43 H 1.08999 * 109.47155 * 299.99889 * 16 15 14 44 44 H 1.08998 * 109.47181 * 60.00087 * 17 15 14 45 45 H 1.08996 * 109.47151 * 180.02562 * 17 15 14 46 46 H 1.09005 * 109.46768 * 299.99950 * 17 15 14 47 47 H 1.09001 * 109.46698 * 59.99668 * 18 15 14 48 48 H 1.08996 * 109.47176 * 179.97438 * 18 15 14 49 49 H 1.09001 * 109.46858 * 300.00320 * 18 15 14 50 50 H 1.08008 * 126.45462 * 179.78523 * 19 3 2 51 51 H 1.09001 * 109.47574 * 186.33809 * 23 22 20 52 52 H 0.96692 * 114.00397 * 179.97438 * 24 23 22 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 7 1.4650 0.0000 0.0000 3 6 2.2678 1.1180 0.0000 4 6 1.8123 2.5122 0.0005 5 8 0.6323 2.7668 -0.1538 6 7 2.7004 3.5113 0.1719 7 6 2.2708 4.9051 0.0339 8 6 1.8104 5.4235 1.3719 9 6 0.4844 5.2993 1.7423 10 6 0.0631 5.7706 2.9716 11 6 0.9657 6.3752 3.8264 12 6 2.2906 6.5046 3.4536 13 6 2.7129 6.0286 2.2265 14 6 4.0955 3.2036 0.4962 15 14 5.1049 3.1735 -1.0693 16 6 5.3809 4.9174 -1.6638 17 6 6.7492 2.3647 -0.7327 18 6 4.1943 2.2084 -2.3770 19 6 3.5781 0.6889 -0.0064 20 6 3.5528 -0.7096 -0.0048 21 35 5.0608 -1.8506 -0.0121 22 6 2.2558 -1.1016 0.0019 23 6 1.7711 -2.5286 0.0052 24 8 2.3686 -3.2371 -1.0824 25 14 2.2468 -3.3421 1.6123 26 1 3.7165 -3.2440 1.8009 27 1 1.5568 -2.6592 2.7360 28 1 1.8461 -4.7718 1.5809 29 1 -0.3633 0.0947 1.0233 30 1 -0.3633 0.8389 -0.5935 31 1 -0.3634 -0.9334 -0.4296 32 1 3.1054 5.5089 -0.3222 33 1 1.4495 4.9630 -0.6804 34 1 -0.2216 4.8302 1.0729 35 1 -0.9721 5.6699 3.2627 36 1 0.6358 6.7468 4.7853 37 1 2.9957 6.9773 4.1212 38 1 3.7481 6.1293 1.9354 39 1 4.4892 3.9664 1.1678 40 1 4.1492 2.2292 0.9819 41 1 5.9137 5.4821 -0.8987 42 1 5.9711 4.8999 -2.5801 43 1 4.4190 5.3906 -1.8608 44 1 6.5877 1.3444 -0.3849 45 1 7.3399 2.3475 -1.6486 46 1 7.2820 2.9294 0.0324 47 1 3.2323 2.6816 -2.5739 48 1 4.7847 2.1912 -3.2931 49 1 4.0328 1.1881 -2.0291 50 1 4.4584 1.3148 -0.0114 51 1 0.6866 -2.5443 -0.1029 52 1 2.1015 -4.1645 -1.1418 RHF calculation, no. of doubly occupied orbitals= 68 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). Br: (AM1): M.J.S. DEWAR AND E. G. ZOEBISCH, THEOCHEM, 180, 1 (1988). 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=0 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 s_22_17626732_5000100.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 9 2021 13:09:39 Heat of formation + Delta-G solvation = 8.786451 kcal Electronic energy + Delta-G solvation = -34266.679463 eV Core-core repulsion = 30017.427506 eV Total energy + Delta-G solvation = -4249.251957 eV No. of doubly occupied orbitals = 68 Molecular weight (most abundant/longest-lived isotopes) = 438.089 amu Computer time = 0.88 seconds Orbital eigenvalues (eV) -42.91251 -40.81033 -39.58698 -37.77362 -36.90068 -34.52114 -33.25898 -31.83249 -31.75272 -30.81133 -29.79026 -28.85999 -28.45010 -28.12551 -27.69378 -26.92793 -25.82512 -23.43304 -22.80059 -22.22597 -21.05217 -20.04310 -18.66626 -18.11941 -17.87133 -17.51698 -17.13964 -16.69313 -16.33811 -16.09400 -15.78733 -15.58565 -15.40187 -15.09830 -14.84385 -14.39083 -14.32811 -14.30354 -14.24824 -14.21350 -14.10020 -13.89123 -13.80995 -13.58561 -13.44198 -13.39481 -13.24231 -13.14141 -13.05867 -12.88571 -12.85188 -12.43481 -12.29561 -12.27734 -12.18855 -11.84187 -11.67693 -11.50349 -11.02814 -10.95008 -10.84874 -10.72236 -10.51403 -9.77351 -9.70864 -9.57465 -9.33759 -9.05035 0.23507 0.37091 0.55492 0.79479 0.92291 1.24360 1.37988 1.45245 1.49941 1.57348 1.72253 1.77160 1.97563 2.22383 2.34670 2.51106 2.98781 3.12501 3.44072 3.64041 3.67581 3.85598 3.89730 3.94436 4.05844 4.13571 4.15365 4.23094 4.23541 4.30418 4.44212 4.54611 4.57710 4.63289 4.65210 4.66434 4.70728 4.71789 4.72293 4.76768 4.81421 4.86881 4.89568 5.10255 5.18581 5.28701 5.39919 5.43984 5.51830 5.58915 5.66784 5.67312 5.68091 5.71744 5.88467 6.13334 6.26832 6.46549 7.11733 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.059 3.941 2 N -0.390 5.390 3 C -0.024 4.024 4 C 0.590 3.410 5 O -0.542 6.542 6 N -0.572 5.572 7 C 0.152 3.848 8 C -0.110 4.110 9 C -0.093 4.093 10 C -0.125 4.125 11 C -0.115 4.115 12 C -0.125 4.125 13 C -0.106 4.106 14 C -0.218 4.218 15 Si 0.975 3.025 16 C -0.445 4.445 17 C -0.449 4.449 18 C -0.452 4.452 19 C -0.131 4.131 20 C -0.156 4.156 21 Br -0.012 7.012 22 C 0.086 3.914 23 C -0.057 4.057 24 O -0.529 6.529 25 Si 0.923 3.077 26 H -0.212 1.212 27 H -0.251 1.251 28 H -0.243 1.243 29 H 0.083 0.917 30 H 0.110 0.890 31 H 0.089 0.911 32 H 0.095 0.905 33 H 0.097 0.903 34 H 0.129 0.871 35 H 0.121 0.879 36 H 0.121 0.879 37 H 0.122 0.878 38 H 0.121 0.879 39 H 0.089 0.911 40 H 0.113 0.887 41 H 0.071 0.929 42 H 0.073 0.927 43 H 0.070 0.930 44 H 0.075 0.925 45 H 0.076 0.924 46 H 0.073 0.927 47 H 0.065 0.935 48 H 0.070 0.930 49 H 0.082 0.918 50 H 0.168 0.832 51 H 0.075 0.925 52 H 0.385 0.615 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 0.555 -0.501 0.964 1.220 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 -0.082 4.082 2 N -0.064 5.064 3 C -0.139 4.139 4 C 0.380 3.620 5 O -0.421 6.421 6 N -0.302 5.302 7 C 0.031 3.969 8 C -0.111 4.111 9 C -0.112 4.112 10 C -0.143 4.143 11 C -0.133 4.133 12 C -0.143 4.143 13 C -0.125 4.125 14 C -0.385 4.385 15 Si 1.171 2.829 16 C -0.553 4.553 17 C -0.558 4.558 18 C -0.560 4.560 19 C -0.157 4.157 20 C -0.242 4.242 21 Br 0.072 6.928 22 C -0.034 4.034 23 C -0.167 4.167 24 O -0.335 6.335 25 Si 0.740 3.260 26 H -0.133 1.133 27 H -0.175 1.175 28 H -0.166 1.166 29 H 0.101 0.899 30 H 0.129 0.871 31 H 0.107 0.893 32 H 0.113 0.887 33 H 0.115 0.885 34 H 0.147 0.853 35 H 0.139 0.861 36 H 0.139 0.861 37 H 0.140 0.860 38 H 0.139 0.861 39 H 0.108 0.892 40 H 0.131 0.869 41 H 0.090 0.910 42 H 0.092 0.908 43 H 0.089 0.911 44 H 0.094 0.906 45 H 0.095 0.905 46 H 0.092 0.908 47 H 0.085 0.915 48 H 0.089 0.911 49 H 0.101 0.899 50 H 0.185 0.815 51 H 0.093 0.907 52 H 0.233 0.767 Dipole moment (debyes) X Y Z Total from point charges 0.573 -0.556 1.569 1.761 hybrid contribution -0.845 0.051 -0.214 0.873 sum -0.272 -0.504 1.356 1.472 Atomic orbital electron populations 1.22442 0.75142 1.05737 1.04861 1.43655 1.07055 1.03823 1.51848 1.19863 0.89523 0.87677 1.16824 1.16774 0.85136 0.83091 0.77043 1.90778 1.15916 1.84210 1.51184 1.47134 1.08876 1.05149 1.69057 1.20530 1.01543 0.80349 0.94482 1.20146 0.94079 0.99845 0.97056 1.21237 0.95621 0.97795 0.96520 1.21212 0.99797 0.98833 0.94419 1.21226 0.93659 0.98863 0.99601 1.21150 0.96118 1.00359 0.96670 1.21063 0.99117 0.98167 0.94123 1.27794 0.88249 1.07067 1.15424 0.80011 0.67161 0.68655 0.67054 1.26111 1.04952 1.17822 1.06459 1.26101 1.16239 1.07794 1.05628 1.26462 1.07848 1.09474 1.12176 1.21868 0.95882 0.93008 1.04970 1.20761 0.91569 0.94157 1.17688 1.96645 1.34892 1.63286 1.97993 1.19490 0.89208 0.87930 1.06781 1.24156 0.99470 0.90423 1.02606 1.86564 1.71027 1.27198 1.48663 0.86000 0.85202 0.80044 0.74765 1.13297 1.17460 1.16643 0.89887 0.87125 0.89291 0.88724 0.88505 0.85327 0.86094 0.86116 0.86005 0.86093 0.89207 0.86918 0.90995 0.90758 0.91114 0.90582 0.90496 0.90805 0.91545 0.91118 0.89878 0.81493 0.90694 0.76729 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 0.06 -0.01 10.32 59.85 0.62 0.60 16 2 N -0.39 -0.79 3.16 -115.59 -0.37 -1.15 16 3 C -0.02 -0.06 6.35 -81.99 -0.52 -0.58 16 4 C 0.59 1.62 7.38 -12.86 -0.09 1.52 16 5 O -0.54 -2.49 13.55 5.19 0.07 -2.42 16 6 N -0.57 -0.27 1.96 -114.54 -0.22 -0.49 16 7 C 0.15 0.01 5.28 -5.20 -0.03 -0.02 16 8 C -0.11 -0.15 5.46 -104.62 -0.57 -0.72 16 9 C -0.09 -0.22 9.53 -39.58 -0.38 -0.60 16 10 C -0.12 -0.23 10.05 -39.59 -0.40 -0.63 16 11 C -0.12 -0.15 10.05 -39.58 -0.40 -0.55 16 12 C -0.12 -0.11 10.05 -39.58 -0.40 -0.51 16 13 C -0.11 -0.06 9.70 -39.58 -0.38 -0.45 16 14 C -0.22 0.31 4.53 59.85 0.27 0.59 16 15 Si 0.98 -2.32 9.83 -169.99 -1.67 -3.99 16 16 C -0.45 0.99 8.35 101.05 0.84 1.83 16 17 C -0.45 0.88 8.65 101.05 0.87 1.75 16 18 C -0.45 -0.03 7.94 101.05 0.80 0.77 16 19 C -0.13 -0.21 5.30 -39.10 -0.21 -0.42 16 20 C -0.16 -0.38 6.11 -39.95 -0.24 -0.63 16 21 Br -0.01 -0.03 30.55 -68.01 -2.08 -2.10 16 22 C 0.09 0.17 5.29 -81.90 -0.43 -0.26 16 23 C -0.06 0.02 2.74 36.01 0.10 0.12 16 24 O -0.53 0.21 12.09 -35.23 -0.43 -0.21 16 25 Si 0.92 -0.29 26.91 -169.99 -4.58 -4.86 16 26 H -0.21 -0.17 5.77 56.52 0.33 0.15 16 27 H -0.25 -0.24 7.11 56.52 0.40 0.16 16 28 H -0.24 0.20 7.11 56.52 0.40 0.60 16 29 H 0.08 -0.08 8.14 -51.93 -0.42 -0.51 16 30 H 0.11 0.10 6.47 -51.93 -0.34 -0.24 16 31 H 0.09 -0.22 6.68 -51.93 -0.35 -0.57 16 32 H 0.09 -0.21 6.10 -51.93 -0.32 -0.53 16 33 H 0.10 0.06 7.46 -51.93 -0.39 -0.32 16 34 H 0.13 0.36 7.36 -52.49 -0.39 -0.02 16 35 H 0.12 0.06 8.06 -52.48 -0.42 -0.37 16 36 H 0.12 -0.04 8.06 -52.49 -0.42 -0.47 16 37 H 0.12 -0.11 8.06 -52.49 -0.42 -0.53 16 38 H 0.12 -0.19 8.06 -52.48 -0.42 -0.61 16 39 H 0.09 -0.26 7.93 -51.93 -0.41 -0.67 16 40 H 0.11 -0.12 4.40 -51.93 -0.23 -0.35 16 41 H 0.07 -0.20 7.96 -51.93 -0.41 -0.62 16 42 H 0.07 -0.14 7.96 -51.93 -0.41 -0.55 16 43 H 0.07 -0.15 6.72 -51.93 -0.35 -0.50 16 44 H 0.08 -0.12 7.52 -51.93 -0.39 -0.51 16 45 H 0.08 -0.14 7.96 -51.93 -0.41 -0.55 16 46 H 0.07 -0.19 7.96 -51.93 -0.41 -0.61 16 47 H 0.07 0.07 7.96 -51.93 -0.41 -0.35 16 48 H 0.07 -0.01 7.96 -51.93 -0.41 -0.43 16 49 H 0.08 0.11 5.23 -51.93 -0.27 -0.16 16 50 H 0.17 -0.07 2.02 -52.48 -0.11 -0.17 16 51 H 0.08 -0.20 6.33 -51.93 -0.33 -0.53 16 52 H 0.38 -1.86 8.74 45.56 0.40 -1.47 16 LS Contribution 422.25 15.07 6.36 6.36 Total: 0.00 -7.38 422.25 -10.38 -17.76 By element: Atomic # 1 Polarization: -3.77 SS G_CDS: -6.93 Total: -10.69 kcal Atomic # 6 Polarization: 2.37 SS G_CDS: -0.55 Total: 1.82 kcal Atomic # 7 Polarization: -1.06 SS G_CDS: -0.59 Total: -1.65 kcal Atomic # 8 Polarization: -2.28 SS G_CDS: -0.36 Total: -2.64 kcal Atomic # 14 Polarization: -2.61 SS G_CDS: -6.25 Total: -8.86 kcal Atomic # 35 Polarization: -0.03 SS G_CDS: -2.08 Total: -2.10 kcal Total LS contribution 6.36 Total: 6.36 kcal Total: -7.38 -10.38 -17.76 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. s_22_17626732_5000100.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 26.543 kcal (2) G-P(sol) polarization free energy of solvation -7.375 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 19.168 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.382 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -17.757 kcal (6) G-S(sol) free energy of system = (1) + (5) 8.786 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.88 seconds