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 1.42903 * 1 3 3 C 1.42899 * 114.00459 * 2 1 4 4 C 1.52992 * 109.47424 * 180.02562 * 3 2 1 5 5 C 1.53001 * 109.47542 * 59.99524 * 4 3 2 6 6 C 1.53000 * 109.47005 * 299.99628 * 4 3 2 7 7 C 1.53003 * 109.47347 * 179.97438 * 4 3 2 8 8 C 1.50693 * 109.47464 * 179.97438 * 7 4 3 9 9 O 1.21290 * 119.99800 * 0.02562 * 8 7 4 10 10 N 1.34773 * 120.00393 * 179.97438 * 8 7 4 11 11 C 1.46988 * 120.72123 * 0.02562 * 10 8 7 12 12 C 1.53159 * 108.43777 * 125.42289 * 11 10 8 13 13 C 1.52505 * 109.79796 * 54.53489 * 12 11 10 14 14 H 1.09003 * 108.93109 * 180.33887 * 13 12 11 15 15 O 1.42686 * 110.62391 * 61.30541 * 13 12 11 16 16 C 1.43076 * 113.88020 * 174.65524 * 15 13 12 17 17 C 1.53233 * 109.44263 * 61.64679 * 16 15 13 18 18 N 1.47169 * 108.69417 * 308.40967 * 17 16 15 19 19 C 1.36932 * 121.22327 * 230.97314 * 18 17 16 20 20 H 1.08003 * 120.00426 * 153.52126 * 19 18 17 21 21 C 1.38820 * 120.00132 * 333.52247 * 19 18 17 22 22 N 1.31617 * 119.99830 * 343.46225 * 21 19 18 23 23 Si 1.86796 * 120.00199 * 163.46343 * 21 19 18 24 24 H 1.48507 * 109.47067 * 89.99831 * 23 21 19 25 25 H 1.48490 * 109.47413 * 210.00085 * 23 21 19 26 26 H 1.48506 * 109.47198 * 330.00110 * 23 21 19 27 27 C 1.47596 * 117.55730 * 50.95211 * 18 17 16 28 28 H 1.08992 * 111.16695 * 187.20297 * 27 18 17 29 29 C 1.46795 * 120.72464 * 179.97438 * 10 8 7 30 30 H 1.08999 * 109.46610 * 300.00499 * 1 2 3 31 31 H 1.08996 * 109.46864 * 59.99708 * 1 2 3 32 32 H 1.08990 * 109.47079 * 180.02562 * 1 2 3 33 33 H 1.08998 * 109.47219 * 59.99624 * 3 2 1 34 34 H 1.09006 * 109.46531 * 300.00012 * 3 2 1 35 35 H 1.08992 * 109.47571 * 179.97438 * 5 4 3 36 36 H 1.09002 * 109.46691 * 300.00504 * 5 4 3 37 37 H 1.09000 * 109.46590 * 59.99971 * 5 4 3 38 38 H 1.09007 * 109.47146 * 300.00046 * 6 4 3 39 39 H 1.08996 * 109.47225 * 60.00023 * 6 4 3 40 40 H 1.09005 * 109.47569 * 180.02562 * 6 4 3 41 41 H 1.08998 * 109.47119 * 59.99525 * 7 4 3 42 42 H 1.09006 * 109.46708 * 299.99866 * 7 4 3 43 43 H 1.09005 * 109.63756 * 5.74664 * 11 10 8 44 44 H 1.08990 * 109.81753 * 245.20950 * 11 10 8 45 45 H 1.09000 * 109.41632 * 294.43684 * 12 11 10 46 46 H 1.09001 * 109.35916 * 174.60169 * 12 11 10 47 47 H 1.09000 * 109.47277 * 301.65472 * 16 15 13 48 48 H 1.08999 * 109.47969 * 181.64578 * 16 15 13 49 49 H 1.09003 * 109.59295 * 188.64687 * 17 16 15 50 50 H 1.08996 * 109.73237 * 68.25396 * 17 16 15 51 51 H 0.96990 * 119.99815 * 179.97438 * 22 21 19 52 52 H 1.09000 * 109.51688 * 354.22724 * 29 10 8 53 53 H 1.08997 * 109.51955 * 114.41074 * 29 10 8 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 2.0104 1.3054 0.0000 4 6 3.5355 1.1846 -0.0006 5 6 3.9865 0.4254 -1.2501 6 6 3.9874 0.4251 1.2483 7 6 4.1579 2.5823 -0.0013 8 6 5.6601 2.4633 -0.0013 9 8 6.1817 1.3682 -0.0013 10 7 6.4241 3.5735 -0.0023 11 6 5.8089 4.9084 -0.0029 12 6 6.3714 5.7016 1.1804 13 6 7.8951 5.7141 1.1162 14 1 8.2803 6.2764 1.9669 15 8 8.3425 6.3474 -0.0816 16 6 9.7624 6.5057 -0.1574 17 6 10.4313 5.1273 -0.1349 18 7 9.9125 4.3700 1.0154 19 6 10.7580 3.7655 1.9069 20 1 10.4379 3.5946 2.9242 21 6 12.0267 3.3723 1.5033 22 7 12.3084 3.2740 0.2214 23 14 13.3339 2.9826 2.7794 24 1 13.2694 1.5410 3.1299 25 1 14.6754 3.2980 2.2262 26 1 13.0962 3.7991 3.9969 27 6 8.4474 4.2863 1.1731 28 1 8.1796 3.8147 2.1185 29 6 7.8888 3.4760 -0.0018 30 1 -0.3632 0.5139 0.8900 31 1 -0.3633 0.5139 -0.8899 32 1 -0.3633 -1.0276 0.0005 33 1 1.6887 1.8464 0.8899 34 1 1.6887 1.8463 -0.8901 35 1 5.0731 0.3397 -1.2508 36 1 3.5431 -0.5703 -1.2500 37 1 3.6645 0.9665 -2.1399 38 1 3.6661 0.9660 2.1386 39 1 3.5441 -0.5706 1.2484 40 1 5.0741 0.3394 1.2482 41 1 3.8366 3.1235 0.8886 42 1 3.8359 3.1229 -0.8914 43 1 4.7279 4.8136 0.1004 44 1 6.0442 5.4234 -0.9342 45 1 6.0518 5.2367 2.1130 46 1 5.9986 6.7251 1.1392 47 1 10.1087 7.0917 0.6939 48 1 10.0219 7.0206 -1.0825 49 1 11.5105 5.2462 -0.0378 50 1 10.2039 4.5928 -1.0572 51 1 13.1949 2.9996 -0.0606 52 1 8.1843 2.4320 0.1028 53 1 8.2807 3.8744 -0.9376 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 ZINC001177055865.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 = -96.781396 kcal Electronic energy + Delta-G solvation = -32227.930733 eV Core-core repulsion = 28100.771718 eV Total energy + Delta-G solvation = -4127.159015 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.25 seconds Orbital eigenvalues (eV) -40.40014 -39.14220 -38.12083 -36.04237 -35.15358 -34.62974 -31.86120 -31.50408 -29.73026 -28.52738 -27.52257 -27.08432 -27.05087 -25.59350 -24.52451 -23.79644 -22.75342 -21.48043 -19.96911 -18.75787 -18.17979 -17.17128 -16.86965 -16.51422 -16.02066 -15.56785 -15.42694 -15.36185 -15.09617 -15.08333 -14.46405 -14.41476 -13.94147 -13.73939 -13.67648 -13.42368 -13.19467 -12.81950 -12.74642 -12.38136 -12.30958 -12.19213 -12.01982 -11.80242 -11.63170 -11.37082 -11.16050 -11.07208 -11.05485 -10.83599 -10.75469 -10.72419 -10.63598 -10.53926 -10.26979 -10.17404 -9.98034 -9.83958 -9.62347 -9.16921 -8.99245 -8.59077 -8.18810 -6.76224 -5.86834 -3.30661 2.91743 3.20357 3.34400 3.41265 3.42833 3.67426 4.30772 4.40959 4.59031 4.72960 4.82325 4.92554 5.00176 5.07282 5.12553 5.15463 5.23817 5.27912 5.29463 5.34178 5.39422 5.41777 5.46132 5.54538 5.63487 5.72909 5.77323 5.77789 6.00860 6.04029 6.05903 6.07933 6.10082 6.14682 6.16875 6.29438 6.31946 6.35553 6.42581 6.59758 6.63354 6.73800 6.79528 6.97608 6.99507 7.07744 7.47429 7.70238 7.80292 7.87463 8.29646 8.54616 9.08107 9.69773 10.27175 11.20849 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.015920 B = 0.002953 C = 0.002654 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1758.366422 B = 9479.701121 C =10547.157054 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.031 3.969 2 O -0.383 6.383 3 C 0.071 3.929 4 C -0.043 4.043 5 C -0.149 4.149 6 C -0.149 4.149 7 C -0.131 4.131 8 C 0.513 3.487 9 O -0.531 6.531 10 N -0.607 5.607 11 C 0.112 3.888 12 C -0.123 4.123 13 C 0.080 3.920 14 H 0.051 0.949 15 O -0.388 6.388 16 C 0.040 3.960 17 C 0.138 3.862 18 N -0.584 5.584 19 C -0.255 4.255 20 H 0.068 0.932 21 C 0.006 3.994 22 N -0.900 5.900 23 Si 0.905 3.095 24 H -0.285 1.285 25 H -0.289 1.289 26 H -0.279 1.279 27 C 0.135 3.865 28 H 0.073 0.927 29 C 0.106 3.894 30 H 0.038 0.962 31 H 0.038 0.962 32 H 0.084 0.916 33 H 0.047 0.953 34 H 0.047 0.953 35 H 0.086 0.914 36 H 0.057 0.943 37 H 0.041 0.959 38 H 0.041 0.959 39 H 0.057 0.943 40 H 0.087 0.913 41 H 0.091 0.909 42 H 0.090 0.910 43 H 0.077 0.923 44 H 0.075 0.925 45 H 0.076 0.924 46 H 0.077 0.923 47 H 0.040 0.960 48 H 0.080 0.920 49 H 0.095 0.905 50 H 0.029 0.971 51 H 0.256 0.744 52 H 0.089 0.911 53 H 0.067 0.933 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -20.709 3.257 -1.238 21.000 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 -0.065 4.065 2 O -0.301 6.301 3 C -0.005 4.005 4 C -0.043 4.043 5 C -0.206 4.206 6 C -0.206 4.206 7 C -0.171 4.171 8 C 0.301 3.699 9 O -0.409 6.409 10 N -0.340 5.340 11 C -0.011 4.011 12 C -0.162 4.162 13 C 0.021 3.979 14 H 0.069 0.931 15 O -0.307 6.307 16 C -0.038 4.038 17 C 0.012 3.988 18 N -0.306 5.306 19 C -0.384 4.384 20 H 0.086 0.914 21 C -0.194 4.194 22 N -0.544 5.544 23 Si 0.735 3.265 24 H -0.212 1.212 25 H -0.215 1.215 26 H -0.205 1.205 27 C 0.027 3.973 28 H 0.092 0.908 29 C -0.018 4.018 30 H 0.057 0.943 31 H 0.057 0.943 32 H 0.102 0.898 33 H 0.065 0.935 34 H 0.065 0.935 35 H 0.105 0.895 36 H 0.076 0.924 37 H 0.060 0.940 38 H 0.060 0.940 39 H 0.076 0.924 40 H 0.105 0.895 41 H 0.109 0.891 42 H 0.108 0.892 43 H 0.095 0.905 44 H 0.093 0.907 45 H 0.095 0.905 46 H 0.095 0.905 47 H 0.059 0.941 48 H 0.099 0.901 49 H 0.113 0.887 50 H 0.047 0.953 51 H 0.066 0.934 52 H 0.107 0.893 53 H 0.085 0.915 Dipole moment (debyes) X Y Z Total from point charges -20.218 2.512 -1.449 20.425 hybrid contribution 0.640 0.127 0.729 0.978 sum -19.578 2.639 -0.720 19.768 Atomic orbital electron populations 1.22718 0.81520 1.02582 0.99721 1.87905 1.19075 1.27830 1.95305 1.22601 0.93688 0.84550 0.99684 1.20243 0.91475 0.94132 0.98478 1.22025 1.04190 0.99733 0.94627 1.22027 1.04236 0.99712 0.94606 1.21704 0.93249 0.98351 1.03845 1.20384 0.88947 0.84105 0.76467 1.90591 1.74756 1.25812 1.49716 1.48329 1.07861 1.05396 1.72448 1.21631 0.96808 0.83208 0.99454 1.21798 0.94850 1.00687 0.98819 1.22237 0.92872 0.94997 0.87818 0.93125 1.87707 1.22840 1.79849 1.40342 1.23326 0.80605 0.99692 1.00188 1.21460 0.99800 0.87769 0.89741 1.44275 0.98316 1.58684 1.29349 1.19148 0.94761 1.33899 0.90631 0.91403 1.25061 0.99539 0.98881 0.95874 1.70013 1.21030 1.50029 1.13308 0.86258 0.81122 0.78317 0.80850 1.21225 1.21484 1.20454 1.21558 0.86205 0.92677 0.96876 0.90850 1.22295 0.76163 1.02844 1.00453 0.94288 0.94294 0.89785 0.93476 0.93510 0.89512 0.92383 0.94006 0.93962 0.92397 0.89462 0.89112 0.89174 0.90466 0.90667 0.90497 0.90492 0.94121 0.90149 0.88661 0.95311 0.93432 0.89251 0.91515 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 18. 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 0.23 11.01 101.05 1.11 1.35 16 2 O -0.38 -4.20 9.35 -35.23 -0.33 -4.53 16 3 C 0.07 0.70 4.81 37.15 0.18 0.88 16 4 C -0.04 -0.50 0.60 -154.51 -0.09 -0.60 16 5 C -0.15 -1.96 8.03 37.16 0.30 -1.67 16 6 C -0.15 -1.98 8.03 37.16 0.30 -1.68 16 7 C -0.13 -1.45 3.12 -27.88 -0.09 -1.53 16 8 C 0.51 7.94 7.11 -10.99 -0.08 7.87 16 9 O -0.53 -10.14 10.76 5.55 0.06 -10.08 16 10 N -0.61 -9.55 2.96 -172.80 -0.51 -10.07 16 11 C 0.11 1.37 6.18 -3.69 -0.02 1.35 16 12 C -0.12 -1.56 5.82 -26.90 -0.16 -1.71 16 13 C 0.08 1.38 2.73 -26.89 -0.07 1.30 16 14 H 0.05 0.91 8.11 -51.93 -0.42 0.49 16 15 O -0.39 -7.03 9.59 -35.23 -0.34 -7.37 16 16 C 0.04 0.75 6.97 37.28 0.26 1.01 16 17 C 0.14 3.17 4.93 -3.56 -0.02 3.16 16 18 N -0.58 -14.14 2.71 -163.90 -0.44 -14.58 16 19 C -0.26 -6.85 9.71 -15.06 -0.15 -6.99 16 20 H 0.07 1.80 7.88 -52.48 -0.41 1.39 16 21 C 0.01 0.15 4.96 -17.43 -0.09 0.07 16 22 N -0.90 -25.57 11.14 55.49 0.62 -24.95 16 23 Si 0.91 21.46 29.58 -169.99 -5.03 16.43 16 24 H -0.29 -6.85 7.11 56.52 0.40 -6.45 16 25 H -0.29 -6.86 7.11 56.52 0.40 -6.46 16 26 H -0.28 -6.48 7.11 56.52 0.40 -6.08 16 27 C 0.14 2.76 3.00 -67.09 -0.20 2.56 16 28 H 0.07 1.54 8.03 -51.93 -0.42 1.13 16 29 C 0.11 2.12 5.62 -3.74 -0.02 2.10 16 30 H 0.04 0.25 8.14 -51.93 -0.42 -0.17 16 31 H 0.04 0.25 8.14 -51.93 -0.42 -0.17 16 32 H 0.08 0.53 8.14 -51.93 -0.42 0.11 16 33 H 0.05 0.40 8.14 -51.93 -0.42 -0.02 16 34 H 0.05 0.40 8.14 -51.93 -0.42 -0.02 16 35 H 0.09 1.38 5.51 -51.93 -0.29 1.10 16 36 H 0.06 0.77 7.68 -51.93 -0.40 0.37 16 37 H 0.04 0.49 8.14 -51.93 -0.42 0.07 16 38 H 0.04 0.50 8.14 -51.93 -0.42 0.08 16 39 H 0.06 0.78 7.68 -51.93 -0.40 0.38 16 40 H 0.09 1.41 5.51 -51.93 -0.29 1.12 16 41 H 0.09 0.82 7.71 -51.93 -0.40 0.42 16 42 H 0.09 0.82 7.93 -51.93 -0.41 0.41 16 43 H 0.08 0.68 5.95 -51.93 -0.31 0.37 16 44 H 0.08 0.96 7.95 -51.93 -0.41 0.55 16 45 H 0.08 0.90 8.14 -51.93 -0.42 0.48 16 46 H 0.08 0.83 8.14 -51.93 -0.42 0.41 16 47 H 0.04 0.76 8.13 -51.93 -0.42 0.34 16 48 H 0.08 1.33 8.14 -51.93 -0.42 0.90 16 49 H 0.10 2.43 6.14 -51.93 -0.32 2.11 16 50 H 0.03 0.71 7.17 -51.93 -0.37 0.34 16 51 H 0.26 7.05 8.31 -40.82 -0.34 6.71 16 52 H 0.09 2.09 7.00 -51.93 -0.36 1.73 16 53 H 0.07 1.44 6.56 -51.93 -0.34 1.10 16 LS Contribution 394.74 15.07 5.95 5.95 Total: -1.00 -30.82 394.74 -8.20 -39.02 By element: Atomic # 1 Polarization: 12.07 SS G_CDS: -9.34 Total: 2.73 kcal Atomic # 6 Polarization: 6.28 SS G_CDS: 1.16 Total: 7.45 kcal Atomic # 7 Polarization: -49.26 SS G_CDS: -0.34 Total: -49.60 kcal Atomic # 8 Polarization: -21.37 SS G_CDS: -0.61 Total: -21.98 kcal Atomic # 14 Polarization: 21.46 SS G_CDS: -5.03 Total: 16.43 kcal Total LS contribution 5.95 Total: 5.95 kcal Total: -30.82 -8.20 -39.02 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. ZINC001177055865.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 -57.764 kcal (2) G-P(sol) polarization free energy of solvation -30.820 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -88.583 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.198 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.017 kcal (6) G-S(sol) free energy of system = (1) + (5) -96.781 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.25 seconds