Wall clock time and date at job start Sat Apr 11 2020 06:09:20 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 1.53005 * 1 3 3 C 1.53003 * 109.46520 * 2 1 4 4 C 1.50698 * 109.54377 * 62.36801 * 3 2 1 5 5 O 1.21283 * 119.99562 * 247.72408 * 4 3 2 6 6 N 1.34769 * 120.00369 * 67.72664 * 4 3 2 7 7 C 1.46506 * 120.00082 * 185.01504 * 6 4 3 8 8 C 1.52998 * 109.47162 * 179.97438 * 7 6 4 9 9 C 1.52997 * 109.51091 * 304.89766 * 8 7 6 10 10 C 1.53290 * 109.55430 * 184.76821 * 8 7 6 11 11 N 1.47151 * 108.38745 * 187.74523 * 10 8 7 12 12 C 1.36929 * 120.98513 * 230.55922 * 11 10 8 13 13 H 1.08000 * 120.00328 * 145.59266 * 12 11 10 14 14 C 1.38814 * 120.00328 * 325.58903 * 12 11 10 15 15 N 1.31621 * 119.99355 * 356.39213 * 14 12 11 16 16 Si 1.86799 * 120.00313 * 176.39402 * 14 12 11 17 17 H 1.48491 * 109.47317 * 89.99895 * 16 14 12 18 18 H 1.48504 * 109.47180 * 210.00416 * 16 14 12 19 19 H 1.48501 * 109.46981 * 329.99912 * 16 14 12 20 20 C 1.47153 * 118.02987 * 50.54026 * 11 10 8 21 21 C 1.53292 * 108.38645 * 309.45929 * 20 11 10 22 22 O 1.42962 * 109.51132 * 64.99716 * 8 7 6 23 23 C 1.53188 * 109.54027 * 182.54009 * 3 2 1 24 24 C 1.53281 * 109.06435 * 176.85341 * 23 3 2 25 25 O 1.42904 * 109.45954 * 302.44733 * 24 23 3 26 26 C 1.42898 * 114.10096 * 61.15693 * 25 24 23 27 27 C 1.53097 * 109.41417 * 298.84250 * 26 25 24 28 28 H 1.09000 * 109.46973 * 306.32987 * 1 2 3 29 29 H 1.08995 * 109.47533 * 66.33158 * 1 2 3 30 30 H 1.09004 * 109.46771 * 186.33308 * 1 2 3 31 31 H 1.08996 * 109.46960 * 240.00534 * 2 1 3 32 32 H 1.08996 * 109.47645 * 119.99890 * 2 1 3 33 33 H 0.97000 * 120.00367 * 5.00757 * 6 4 3 34 34 H 1.08997 * 109.47024 * 59.99622 * 7 6 4 35 35 H 1.09000 * 109.46847 * 299.99902 * 7 6 4 36 36 H 1.09009 * 109.46946 * 180.10334 * 9 8 7 37 37 H 1.09000 * 109.47612 * 300.10014 * 9 8 7 38 38 H 1.09000 * 109.47605 * 60.10634 * 9 8 7 39 39 H 1.09002 * 109.68440 * 307.47429 * 10 8 7 40 40 H 1.09002 * 109.67975 * 67.99211 * 10 8 7 41 41 H 0.97008 * 119.99459 * 179.97438 * 15 14 12 42 42 H 1.09010 * 109.68087 * 189.74354 * 20 11 10 43 43 H 1.08995 * 109.68496 * 69.19080 * 20 11 10 44 44 H 1.09001 * 109.51379 * 172.22704 * 21 20 11 45 45 H 1.09003 * 109.51914 * 292.33229 * 21 20 11 46 46 H 1.08998 * 109.52119 * 296.84580 * 23 3 2 47 47 H 1.08999 * 109.51878 * 57.02992 * 23 3 2 48 48 H 1.08994 * 109.45505 * 182.45086 * 24 23 3 49 49 H 1.09000 * 109.45721 * 62.43768 * 24 23 3 50 50 H 1.08997 * 109.48268 * 178.85971 * 26 25 24 51 51 H 1.09002 * 109.48918 * 58.82974 * 26 25 24 52 52 H 1.09002 * 109.52099 * 297.69688 * 27 26 25 53 53 H 1.09003 * 109.57601 * 177.54725 * 27 26 25 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 1.5300 0.0000 0.0000 3 6 2.0399 1.4426 0.0000 4 6 1.5869 2.1374 1.2582 5 8 0.7760 3.0371 1.1956 6 7 2.0828 1.7591 2.4528 7 6 1.5627 2.3577 3.6847 8 6 2.2898 1.7578 4.8898 9 6 2.1645 0.2333 4.8552 10 6 1.6667 2.2936 6.1838 11 7 2.4967 1.8523 7.3160 12 6 1.9363 1.2363 8.4029 13 1 2.4792 0.4618 8.9242 14 6 0.6704 1.6073 8.8350 15 7 0.0380 2.5992 8.2444 16 14 -0.1357 0.6990 10.2544 17 1 0.2237 1.3615 11.5338 18 1 -1.6106 0.7213 10.0825 19 1 0.3390 -0.7079 10.2750 20 6 3.9468 2.0923 7.2453 21 6 4.4589 1.5663 5.8996 22 8 3.6709 2.1245 4.8453 23 6 3.5704 1.4451 -0.0640 24 6 4.0659 2.8934 -0.1429 25 8 3.4890 3.5325 -1.2835 26 6 2.0619 3.6000 -1.2548 27 6 1.4858 2.1819 -1.2217 28 1 -0.3633 0.6088 0.8279 29 1 -0.3634 0.4125 -0.9411 30 1 -0.3633 -1.0214 0.1134 31 1 1.8933 -0.5137 -0.8900 32 1 1.8935 -0.5138 0.8899 33 1 2.7840 1.0903 2.4972 34 1 0.4953 2.1527 3.7658 35 1 1.7249 3.4353 3.6615 36 1 2.6812 -0.1933 5.7150 37 1 1.1113 -0.0456 4.8891 38 1 2.6118 -0.1473 3.9370 39 1 1.6366 3.3827 6.1533 40 1 0.6558 1.9013 6.2943 41 1 -0.8468 2.8582 8.5461 42 1 4.4461 1.5661 8.0590 43 1 4.1462 3.1611 7.3216 44 1 5.5012 1.8567 5.7679 45 1 4.3784 0.4794 5.8789 46 1 3.9731 0.9682 0.8296 47 1 3.8989 0.8994 -0.9485 48 1 5.1521 2.9012 -0.2326 49 1 3.7716 3.4276 0.7606 50 1 1.7044 4.1168 -2.1455 51 1 1.7413 4.1435 -0.3660 52 1 1.7722 1.6512 -2.1297 53 1 0.3989 2.2307 -1.1559 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 ZINC001108310375.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 06:09:20 Heat of formation + Delta-G solvation = -114.832299 kcal Electronic energy + Delta-G solvation = -32759.832226 eV Core-core repulsion = 28631.890465 eV Total energy + Delta-G solvation = -4127.941761 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.89 seconds Orbital eigenvalues (eV) -41.06708 -39.19472 -38.02201 -35.58083 -35.01886 -34.35068 -31.97824 -31.30941 -31.17162 -30.70285 -27.98059 -26.81686 -26.04023 -25.16466 -23.83871 -23.24320 -22.42148 -21.82255 -21.04265 -19.47451 -18.58133 -17.19924 -16.81134 -16.23985 -16.08439 -15.88445 -15.66442 -15.32815 -15.10084 -14.63281 -14.49056 -14.29828 -14.08281 -13.92806 -13.57532 -13.52352 -13.32035 -13.07852 -12.73207 -12.55324 -12.46866 -12.30821 -12.18565 -11.91627 -11.64392 -11.61311 -11.41512 -11.22764 -11.21939 -10.98225 -10.90570 -10.67879 -10.57657 -10.50769 -10.33417 -10.29112 -10.09707 -9.74932 -9.57808 -9.38091 -9.02130 -8.81644 -8.59574 -6.65528 -5.88692 -3.42209 2.72415 3.27279 3.31242 3.37366 3.38080 3.80085 4.22078 4.28643 4.38757 4.41188 4.55365 4.82558 4.89740 5.03603 5.09614 5.14019 5.22999 5.24778 5.30014 5.42156 5.42932 5.45888 5.51059 5.60124 5.64240 5.65571 5.68114 5.74402 5.80505 5.88681 5.90398 5.91338 5.93181 5.98039 6.01996 6.07222 6.10984 6.14784 6.29843 6.43369 6.56554 6.67164 6.73027 6.80603 7.06357 7.11103 7.47583 7.65244 7.67844 7.86267 8.33877 8.35905 9.09375 9.68425 10.29995 11.18729 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.017831 B = 0.003072 C = 0.002887 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1569.907243 B = 9113.106081 C = 9696.688904 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.157 4.157 2 C -0.108 4.108 3 C -0.080 4.080 4 C 0.521 3.479 5 O -0.541 6.541 6 N -0.716 5.716 7 C 0.139 3.861 8 C 0.077 3.923 9 C -0.160 4.160 10 C 0.163 3.837 11 N -0.591 5.591 12 C -0.258 4.258 13 H 0.064 0.936 14 C 0.011 3.989 15 N -0.902 5.902 16 Si 0.905 3.095 17 H -0.285 1.285 18 H -0.289 1.289 19 H -0.279 1.279 20 C 0.109 3.891 21 C 0.046 3.954 22 O -0.384 6.384 23 C -0.145 4.145 24 C 0.058 3.942 25 O -0.385 6.385 26 C 0.051 3.949 27 C -0.128 4.128 28 H 0.058 0.942 29 H 0.059 0.941 30 H 0.057 0.943 31 H 0.073 0.927 32 H 0.068 0.932 33 H 0.400 0.600 34 H 0.080 0.920 35 H 0.073 0.927 36 H 0.072 0.928 37 H 0.062 0.938 38 H 0.039 0.961 39 H 0.029 0.971 40 H 0.095 0.905 41 H 0.257 0.743 42 H 0.061 0.939 43 H 0.025 0.975 44 H 0.079 0.921 45 H 0.047 0.953 46 H 0.077 0.923 47 H 0.082 0.918 48 H 0.096 0.904 49 H 0.053 0.947 50 H 0.091 0.909 51 H 0.071 0.929 52 H 0.074 0.926 53 H 0.085 0.915 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 5.985 -5.247 -17.765 19.467 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 -0.214 4.214 2 C -0.146 4.146 3 C -0.083 4.083 4 C 0.307 3.693 5 O -0.418 6.418 6 N -0.367 5.367 7 C 0.016 3.984 8 C 0.036 3.964 9 C -0.218 4.218 10 C 0.036 3.964 11 N -0.314 5.314 12 C -0.388 4.388 13 H 0.082 0.918 14 C -0.188 4.188 15 N -0.545 5.545 16 Si 0.734 3.266 17 H -0.212 1.212 18 H -0.215 1.215 19 H -0.204 1.204 20 C -0.017 4.017 21 C -0.032 4.032 22 O -0.304 6.304 23 C -0.183 4.183 24 C -0.019 4.019 25 O -0.304 6.304 26 C -0.026 4.026 27 C -0.166 4.166 28 H 0.077 0.923 29 H 0.078 0.922 30 H 0.076 0.924 31 H 0.092 0.908 32 H 0.087 0.913 33 H 0.236 0.764 34 H 0.098 0.902 35 H 0.091 0.909 36 H 0.091 0.909 37 H 0.081 0.919 38 H 0.058 0.942 39 H 0.047 0.953 40 H 0.113 0.887 41 H 0.067 0.933 42 H 0.079 0.921 43 H 0.043 0.957 44 H 0.097 0.903 45 H 0.065 0.935 46 H 0.096 0.904 47 H 0.101 0.899 48 H 0.114 0.886 49 H 0.071 0.929 50 H 0.109 0.891 51 H 0.089 0.911 52 H 0.092 0.908 53 H 0.103 0.897 Dipole moment (debyes) X Y Z Total from point charges 5.388 -4.350 -18.004 19.290 hybrid contribution -0.377 -1.056 1.394 1.789 sum 5.011 -5.406 -16.610 18.172 Atomic orbital electron populations 1.21847 0.95076 1.01939 1.02540 1.21544 0.96793 0.93382 1.02840 1.20969 0.96429 0.96898 0.94036 1.20346 0.81260 0.83056 0.84671 1.90667 1.34340 1.29991 1.86850 1.46064 1.40900 1.43954 1.05809 1.21345 0.97610 0.98341 0.81146 1.22582 0.82849 0.94126 0.96846 1.22190 1.02551 0.96042 1.00985 1.21283 0.96085 0.96798 0.82208 1.43894 1.00589 1.69492 1.17449 1.19097 1.00482 1.13621 1.05590 0.91789 1.25304 0.99133 0.96433 0.97976 1.69922 1.14179 1.28317 1.42123 0.86267 0.78511 0.79293 0.82506 1.21195 1.21498 1.20397 1.21615 0.87265 0.97951 0.94876 1.23035 0.93747 0.97329 0.89094 1.87820 1.19535 1.73434 1.49586 1.22329 0.93461 0.98839 1.03627 1.22607 0.98483 0.91459 0.89354 1.87889 1.20376 1.79109 1.42991 1.22774 0.80339 0.96176 1.03294 1.22055 1.01944 0.96554 0.96053 0.92261 0.92233 0.92405 0.90816 0.91336 0.76441 0.90160 0.90893 0.90863 0.91894 0.94165 0.95307 0.88687 0.93324 0.92087 0.95665 0.90254 0.93496 0.90396 0.89926 0.88608 0.92883 0.89112 0.91100 0.90760 0.89686 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -0.16 -1.51 9.19 37.16 0.34 -1.17 16 2 C -0.11 -0.96 4.99 -26.73 -0.13 -1.09 16 3 C -0.08 -0.84 0.45 -155.47 -0.07 -0.91 16 4 C 0.52 7.18 3.78 -10.99 -0.04 7.14 16 5 O -0.54 -9.26 14.18 5.56 0.08 -9.19 16 6 N -0.72 -9.81 5.07 -60.29 -0.31 -10.12 16 7 C 0.14 2.33 4.86 -4.04 -0.02 2.31 16 8 C 0.08 1.39 0.78 -90.47 -0.07 1.32 16 9 C -0.16 -2.63 7.86 37.16 0.29 -2.34 16 10 C 0.16 3.73 4.02 -3.54 -0.01 3.71 16 11 N -0.59 -14.16 2.55 -171.83 -0.44 -14.60 16 12 C -0.26 -6.77 9.61 -15.06 -0.14 -6.91 16 13 H 0.06 1.65 7.83 -52.49 -0.41 1.23 16 14 C 0.01 0.30 5.19 -17.43 -0.09 0.21 16 15 N -0.90 -25.32 10.99 55.49 0.61 -24.71 16 16 Si 0.90 20.98 29.56 -169.99 -5.02 15.96 16 17 H -0.29 -6.66 7.11 56.52 0.40 -6.26 16 18 H -0.29 -6.76 7.11 56.52 0.40 -6.36 16 19 H -0.28 -6.30 7.11 56.52 0.40 -5.90 16 20 C 0.11 2.21 6.73 -3.53 -0.02 2.19 16 21 C 0.05 0.77 6.60 37.31 0.25 1.02 16 22 O -0.38 -6.89 10.17 -35.23 -0.36 -7.25 16 23 C -0.14 -1.34 4.82 -26.49 -0.13 -1.47 16 24 C 0.06 0.64 6.62 37.30 0.25 0.88 16 25 O -0.38 -4.83 10.77 -35.23 -0.38 -5.21 16 26 C 0.05 0.60 6.56 37.21 0.24 0.84 16 27 C -0.13 -1.34 4.05 -26.59 -0.11 -1.45 16 28 H 0.06 0.71 7.09 -51.93 -0.37 0.34 16 29 H 0.06 0.53 6.83 -51.93 -0.35 0.18 16 30 H 0.06 0.49 8.14 -51.93 -0.42 0.07 16 31 H 0.07 0.54 8.14 -51.93 -0.42 0.11 16 32 H 0.07 0.59 8.14 -51.93 -0.42 0.17 16 33 H 0.40 4.87 5.82 -40.82 -0.24 4.63 16 34 H 0.08 1.39 8.14 -51.93 -0.42 0.96 16 35 H 0.07 1.33 8.14 -51.93 -0.42 0.91 16 36 H 0.07 1.33 6.11 -51.92 -0.32 1.01 16 37 H 0.06 1.05 8.14 -51.93 -0.42 0.63 16 38 H 0.04 0.54 6.59 -51.93 -0.34 0.20 16 39 H 0.03 0.73 8.14 -51.93 -0.42 0.31 16 40 H 0.10 2.41 6.34 -51.93 -0.33 2.08 16 41 H 0.26 7.00 8.31 -40.82 -0.34 6.67 16 42 H 0.06 1.17 7.96 -51.92 -0.41 0.76 16 43 H 0.03 0.54 8.14 -51.93 -0.42 0.12 16 44 H 0.08 1.12 8.14 -51.93 -0.42 0.70 16 45 H 0.05 0.76 6.26 -51.93 -0.32 0.44 16 46 H 0.08 0.65 7.01 -51.93 -0.36 0.29 16 47 H 0.08 0.66 8.14 -51.93 -0.42 0.24 16 48 H 0.10 0.88 8.14 -51.93 -0.42 0.46 16 49 H 0.05 0.68 7.38 -51.93 -0.38 0.30 16 50 H 0.09 0.91 8.14 -51.93 -0.42 0.49 16 51 H 0.07 1.01 6.10 -51.93 -0.32 0.69 16 52 H 0.07 0.66 8.14 -51.93 -0.42 0.24 16 53 H 0.08 0.93 6.51 -51.93 -0.34 0.59 16 LS Contribution 392.69 15.07 5.92 5.92 Total: -1.00 -30.11 392.69 -8.50 -38.61 By element: Atomic # 1 Polarization: 15.43 SS G_CDS: -9.13 Total: 6.30 kcal Atomic # 6 Polarization: 3.76 SS G_CDS: 0.53 Total: 4.29 kcal Atomic # 7 Polarization: -49.29 SS G_CDS: -0.13 Total: -49.43 kcal Atomic # 8 Polarization: -20.98 SS G_CDS: -0.66 Total: -21.64 kcal Atomic # 14 Polarization: 20.98 SS G_CDS: -5.02 Total: 15.96 kcal Total LS contribution 5.92 Total: 5.92 kcal Total: -30.11 -8.50 -38.61 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. ZINC001108310375.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 -76.220 kcal (2) G-P(sol) polarization free energy of solvation -30.109 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -106.330 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.503 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -38.612 kcal (6) G-S(sol) free energy of system = (1) + (5) -114.832 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.89 seconds