Wall clock time and date at job start Fri Apr 10 2020 22:20:47 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 1.52997 * 1 3 3 C 1.52999 * 109.46873 * 2 1 4 4 C 1.52997 * 109.47489 * 120.00236 * 2 1 3 5 5 N 1.46900 * 109.47286 * 174.99807 * 4 2 1 6 6 C 1.46842 * 110.99880 * 170.00036 * 5 4 2 7 7 C 1.53041 * 109.52255 * 185.83983 * 6 5 4 8 8 C 1.53121 * 109.28214 * 300.82470 * 7 6 5 9 9 N 1.46891 * 109.52712 * 177.55749 * 8 7 6 10 10 C 1.46957 * 111.00125 * 174.99865 * 9 8 7 11 11 C 1.53049 * 109.36218 * 183.19086 * 10 9 8 12 12 N 1.46960 * 109.36672 * 301.59591 * 11 10 9 13 13 C 1.46901 * 111.00304 * 183.19152 * 12 11 10 14 14 C 1.50694 * 109.47026 * 300.69276 * 13 12 11 15 15 H 1.08002 * 120.00150 * 4.81701 * 14 13 12 16 16 C 1.37876 * 120.00184 * 184.81834 * 14 13 12 17 17 N 1.31524 * 119.99618 * 359.97438 * 16 14 13 18 18 Si 1.86792 * 120.00397 * 179.97438 * 16 14 13 19 19 H 1.48499 * 109.47276 * 59.99779 * 18 16 14 20 20 H 1.48502 * 109.47608 * 180.02562 * 18 16 14 21 21 H 1.48503 * 109.47159 * 300.00114 * 18 16 14 22 22 C 1.46957 * 110.87810 * 59.32343 * 12 11 10 23 23 C 1.46964 * 111.00030 * 298.80101 * 9 8 7 24 24 C 1.53117 * 109.15931 * 57.64663 * 8 7 6 25 25 C 1.46844 * 111.00208 * 294.21494 * 5 4 2 26 26 H 1.09001 * 109.46920 * 299.99369 * 1 2 3 27 27 H 1.08999 * 109.47623 * 60.00110 * 1 2 3 28 28 H 1.09004 * 109.46701 * 179.97438 * 1 2 3 29 29 H 1.09001 * 109.46920 * 240.00631 * 2 1 3 30 30 H 1.08999 * 109.47242 * 60.00251 * 3 2 1 31 31 H 1.09003 * 109.47169 * 180.02562 * 3 2 1 32 32 H 1.09004 * 109.47492 * 299.99952 * 3 2 1 33 33 H 1.08998 * 109.46858 * 55.00208 * 4 2 1 34 34 H 1.08991 * 109.46896 * 295.00162 * 4 2 1 35 35 H 1.08996 * 109.46130 * 65.83009 * 6 5 4 36 36 H 1.08999 * 109.46548 * 305.85519 * 6 5 4 37 37 H 1.09001 * 109.50685 * 180.87704 * 7 6 5 38 38 H 1.09000 * 109.50159 * 60.76230 * 7 6 5 39 39 H 1.09001 * 109.52003 * 297.68543 * 8 7 6 40 40 H 1.09003 * 109.48491 * 303.15227 * 10 9 8 41 41 H 1.08988 * 109.48974 * 63.22249 * 10 9 8 42 42 H 1.09004 * 109.49059 * 61.56520 * 11 10 9 43 43 H 1.09001 * 109.48918 * 181.63280 * 11 10 9 44 44 H 1.09000 * 109.47112 * 60.68844 * 13 12 11 45 45 H 1.08996 * 109.47020 * 180.69095 * 13 12 11 46 46 H 0.96999 * 119.99654 * 179.97438 * 17 16 14 47 47 H 1.08995 * 109.48649 * 180.71501 * 22 12 11 48 48 H 1.08996 * 109.48829 * 60.64491 * 22 12 11 49 49 H 1.08995 * 109.48411 * 296.77540 * 23 9 8 50 50 H 1.08991 * 109.48781 * 56.84008 * 23 9 8 51 51 H 1.09005 * 109.50236 * 62.29455 * 24 8 7 52 52 H 1.09002 * 109.50230 * 182.40408 * 24 8 7 53 53 H 1.09008 * 109.46264 * 294.17573 * 25 5 4 54 54 H 1.09003 * 109.46438 * 54.13840 * 25 5 4 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 1.4425 0.0000 4 6 2.0401 -0.7213 1.2492 5 7 3.5041 -0.8267 1.1903 6 6 4.0497 -1.2965 2.4700 7 6 5.5788 -1.2553 2.4200 8 6 6.0714 -2.1459 1.2760 9 7 7.5353 -2.0646 1.1860 10 6 8.0535 -2.9977 0.1758 11 6 9.5829 -2.9401 0.1690 12 7 10.0175 -1.5655 -0.1159 13 6 11.4815 -1.4842 -0.2060 14 6 12.0908 -1.9384 1.0953 15 1 11.4596 -2.3291 1.8799 16 6 13.4540 -1.8554 1.2844 17 7 14.2227 -1.3802 0.3288 18 14 14.2092 -2.4178 2.8976 19 1 13.9041 -3.8552 3.1126 20 1 15.6809 -2.2256 2.8490 21 1 13.6428 -1.6193 4.0143 22 6 9.4994 -0.6324 0.8942 23 6 7.9699 -0.6899 0.9012 24 6 5.4504 -1.6651 -0.0383 25 6 3.9251 -1.6944 0.0829 26 1 -0.3633 0.5137 0.8901 27 1 -0.3634 0.5138 -0.8900 28 1 -0.3633 -1.0277 -0.0005 29 1 1.8933 -0.5137 -0.8901 30 1 1.6766 1.9563 0.8900 31 1 3.1299 1.4426 -0.0005 32 1 1.6766 1.9564 -0.8900 33 1 1.6055 -1.7198 1.2950 34 1 1.7517 -0.1584 2.1368 35 1 3.7198 -2.3192 2.6520 36 1 3.6952 -0.6521 3.2745 37 1 5.9837 -1.6187 3.3645 38 1 5.9099 -0.2305 2.2518 39 1 5.7748 -3.1778 1.4641 40 1 7.7288 -4.0102 0.4156 41 1 7.6746 -2.7170 -0.8068 42 1 9.9628 -3.2471 1.1435 43 1 9.9686 -3.6100 -0.5995 44 1 11.8320 -2.1255 -1.0146 45 1 11.7766 -0.4540 -0.4053 46 1 15.1817 -1.3215 0.4620 47 1 9.8241 0.3801 0.6545 48 1 9.8783 -0.9131 1.8769 49 1 7.5901 -0.3830 -0.0733 50 1 7.5843 -0.0200 1.6696 51 1 5.7795 -0.6467 -0.2453 52 1 5.7636 -2.3214 -0.8503 53 1 3.5957 -2.7154 0.2760 54 1 3.4800 -1.3390 -0.8464 RHF calculation, no. of doubly occupied orbitals= 61 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) 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 ZINC001258014264.mol2 54 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Fri Apr 10 2020 22:20:47 Heat of formation + Delta-G solvation = 3.071990 kcal Electronic energy + Delta-G solvation = -27182.086781 eV Core-core repulsion = 23767.029301 eV Total energy + Delta-G solvation = -3415.057480 eV No. of doubly occupied orbitals = 61 Molecular weight (most abundant/longest-lived isotopes) = 309.248 amu Computer time = 4.50 seconds Orbital eigenvalues (eV) -40.01431 -38.32877 -36.29523 -34.58619 -32.50942 -31.13476 -30.93821 -30.19951 -27.65419 -27.34271 -25.81683 -24.58015 -23.60430 -22.82584 -22.48403 -21.38479 -20.00786 -19.75184 -18.52153 -16.60907 -16.28557 -15.67418 -15.44852 -15.17446 -14.73998 -14.46982 -14.37614 -14.24668 -14.08639 -13.81615 -13.59246 -13.26299 -13.04611 -12.84025 -12.67019 -12.55540 -12.31488 -11.95602 -11.85757 -11.81569 -11.36060 -11.32097 -11.20969 -11.05296 -10.98327 -10.84926 -10.82179 -10.76911 -10.49711 -10.42193 -10.23852 -10.19175 -9.90912 -9.76787 -9.44562 -8.47745 -8.39055 -7.90308 -7.10813 -5.98571 -4.07361 3.31873 3.36328 3.39482 3.66563 4.15961 4.44325 4.46738 4.65981 4.72739 4.85128 4.90810 4.98014 5.10235 5.11442 5.21138 5.28307 5.31464 5.34113 5.38698 5.40922 5.45629 5.50372 5.56004 5.62068 5.66079 5.69345 5.71418 5.74044 5.82752 5.85965 5.94003 5.98672 6.03461 6.06129 6.08624 6.13871 6.20490 6.26954 6.33369 6.45630 6.69219 6.84012 6.90752 6.93605 6.95270 7.27938 7.43249 7.49426 7.56619 7.94440 8.11481 8.32813 8.36353 9.03402 9.59238 11.06363 Molecular weight = 309.25amu Principal moments of inertia in cm(-1) A = 0.031205 B = 0.002584 C = 0.002545 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 897.064314 B =10832.694574 C =10999.207257 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.147 4.147 2 C -0.095 4.095 3 C -0.138 4.138 4 C 0.061 3.939 5 N -0.535 5.535 6 C 0.060 3.940 7 C -0.109 4.109 8 C 0.086 3.914 9 N -0.530 5.530 10 C 0.058 3.942 11 C 0.064 3.936 12 N -0.543 5.543 13 C 0.187 3.813 14 C -0.547 4.547 15 H 0.058 0.942 16 C 0.063 3.937 17 N -0.893 5.893 18 Si 0.890 3.110 19 H -0.277 1.277 20 H -0.287 1.287 21 H -0.277 1.277 22 C 0.065 3.935 23 C 0.056 3.944 24 C -0.150 4.150 25 C 0.060 3.940 26 H 0.054 0.946 27 H 0.056 0.944 28 H 0.051 0.949 29 H 0.070 0.930 30 H 0.049 0.951 31 H 0.068 0.932 32 H 0.045 0.955 33 H 0.030 0.970 34 H 0.073 0.927 35 H 0.030 0.970 36 H 0.074 0.926 37 H 0.073 0.927 38 H 0.075 0.925 39 H 0.072 0.928 40 H 0.065 0.935 41 H 0.036 0.964 42 H 0.048 0.952 43 H 0.066 0.934 44 H 0.027 0.973 45 H 0.033 0.967 46 H 0.262 0.738 47 H 0.066 0.934 48 H 0.046 0.954 49 H 0.037 0.963 50 H 0.071 0.929 51 H 0.077 0.923 52 H 0.067 0.933 53 H 0.029 0.971 54 H 0.074 0.926 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -26.165 1.082 0.790 26.199 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 -0.205 4.205 2 C -0.114 4.114 3 C -0.195 4.195 4 C -0.067 4.067 5 N -0.260 5.260 6 C -0.069 4.069 7 C -0.147 4.147 8 C -0.023 4.023 9 N -0.253 5.253 10 C -0.070 4.070 11 C -0.065 4.065 12 N -0.268 5.268 13 C 0.062 3.938 14 C -0.586 4.586 15 H 0.077 0.923 16 C -0.139 4.139 17 N -0.531 5.531 18 Si 0.717 3.283 19 H -0.203 1.203 20 H -0.213 1.213 21 H -0.203 1.203 22 C -0.064 4.064 23 C -0.072 4.072 24 C -0.189 4.189 25 C -0.068 4.068 26 H 0.073 0.927 27 H 0.075 0.925 28 H 0.070 0.930 29 H 0.088 0.912 30 H 0.068 0.932 31 H 0.087 0.913 32 H 0.064 0.936 33 H 0.048 0.952 34 H 0.091 0.909 35 H 0.048 0.952 36 H 0.092 0.908 37 H 0.092 0.908 38 H 0.093 0.907 39 H 0.090 0.910 40 H 0.083 0.917 41 H 0.054 0.946 42 H 0.066 0.934 43 H 0.084 0.916 44 H 0.045 0.955 45 H 0.051 0.949 46 H 0.072 0.928 47 H 0.084 0.916 48 H 0.064 0.936 49 H 0.056 0.944 50 H 0.089 0.911 51 H 0.095 0.905 52 H 0.085 0.915 53 H 0.047 0.953 54 H 0.092 0.908 Dipole moment (debyes) X Y Z Total from point charges -25.745 1.585 0.655 25.802 hybrid contribution 0.257 -1.190 1.041 1.602 sum -25.488 0.395 1.695 25.548 Atomic orbital electron populations 1.21826 0.95319 1.01475 1.01869 1.21157 0.94937 0.97359 0.97946 1.21715 1.02385 0.94720 1.00706 1.22154 0.87331 0.98595 0.98650 1.61904 1.09181 1.50937 1.03971 1.22064 0.95580 0.98122 0.91106 1.21660 0.93353 1.00951 0.98744 1.21717 0.87646 0.99031 0.93890 1.62352 1.08018 1.07077 1.47850 1.22217 0.96493 0.95308 0.92946 1.21925 0.91827 0.92006 1.00727 1.62683 1.14483 1.04627 1.44983 1.19718 0.80416 0.97729 0.95975 1.21743 0.92524 1.42733 1.01588 0.92347 1.24972 0.97332 0.95081 0.96499 1.69943 1.04904 1.45693 1.32601 0.86697 0.78019 0.79274 0.84264 1.20292 1.21295 1.20277 1.21922 0.91745 0.96960 0.95811 1.22289 0.96577 0.89161 0.99153 1.22285 0.94446 1.02941 0.99223 1.22059 0.96037 0.94174 0.94560 0.92691 0.92530 0.92993 0.91182 0.93207 0.91322 0.93550 0.95214 0.90899 0.95159 0.90801 0.90803 0.90681 0.90958 0.91673 0.94597 0.93406 0.91569 0.95518 0.94913 0.92832 0.91593 0.93552 0.94438 0.91095 0.90491 0.91483 0.95297 0.90768 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 -0.15 -0.92 9.19 37.16 0.34 -0.58 16 2 C -0.10 -0.72 2.84 -90.62 -0.26 -0.98 16 3 C -0.14 -1.11 9.08 37.16 0.34 -0.77 16 4 C 0.06 0.49 4.35 -3.83 -0.02 0.47 16 5 N -0.54 -5.10 4.11 -234.68 -0.96 -6.06 16 6 C 0.06 0.57 5.46 -3.83 -0.02 0.55 16 7 C -0.11 -1.22 5.25 -26.65 -0.14 -1.36 16 8 C 0.09 1.06 2.30 -67.60 -0.16 0.91 16 9 N -0.53 -8.14 4.70 -226.35 -1.06 -9.20 16 10 C 0.06 0.94 5.26 -3.77 -0.02 0.92 16 11 C 0.06 1.28 5.24 -3.77 -0.02 1.26 16 12 N -0.54 -11.89 4.92 -235.91 -1.16 -13.05 16 13 C 0.19 4.89 5.14 -4.98 -0.03 4.87 16 14 C -0.55 -15.20 7.67 -34.44 -0.26 -15.46 16 15 H 0.06 1.63 5.81 -52.49 -0.31 1.32 16 16 C 0.06 1.81 5.46 -17.82 -0.10 1.71 16 17 N -0.89 -26.51 13.29 55.43 0.74 -25.78 16 18 Si 0.89 21.75 29.54 -169.99 -5.02 16.73 16 19 H -0.28 -6.71 7.11 56.52 0.40 -6.31 16 20 H -0.29 -6.95 7.11 56.52 0.40 -6.55 16 21 H -0.28 -6.71 7.11 56.52 0.40 -6.31 16 22 C 0.06 1.29 5.32 -3.77 -0.02 1.27 16 23 C 0.06 0.90 4.82 -3.76 -0.02 0.88 16 24 C -0.15 -1.71 4.68 -26.65 -0.12 -1.83 16 25 C 0.06 0.59 5.30 -3.84 -0.02 0.57 16 26 H 0.05 0.33 8.14 -51.93 -0.42 -0.10 16 27 H 0.06 0.34 8.14 -51.93 -0.42 -0.09 16 28 H 0.05 0.31 8.14 -51.93 -0.42 -0.11 16 29 H 0.07 0.57 6.22 -51.93 -0.32 0.24 16 30 H 0.05 0.38 8.14 -51.93 -0.42 -0.04 16 31 H 0.07 0.66 7.75 -51.93 -0.40 0.25 16 32 H 0.05 0.35 8.14 -51.93 -0.42 -0.08 16 33 H 0.03 0.24 8.12 -51.93 -0.42 -0.18 16 34 H 0.07 0.57 7.99 -51.93 -0.41 0.15 16 35 H 0.03 0.29 8.14 -51.93 -0.42 -0.14 16 36 H 0.07 0.64 8.02 -51.93 -0.42 0.23 16 37 H 0.07 0.85 8.14 -51.93 -0.42 0.42 16 38 H 0.07 0.91 6.25 -51.93 -0.32 0.58 16 39 H 0.07 0.89 8.11 -51.93 -0.42 0.47 16 40 H 0.06 0.94 8.12 -51.93 -0.42 0.52 16 41 H 0.04 0.57 6.67 -51.94 -0.35 0.22 16 42 H 0.05 1.06 6.46 -51.93 -0.34 0.73 16 43 H 0.07 1.31 8.14 -51.93 -0.42 0.89 16 44 H 0.03 0.74 8.14 -51.93 -0.42 0.32 16 45 H 0.03 0.92 8.12 -51.93 -0.42 0.50 16 46 H 0.26 7.39 8.31 -40.82 -0.34 7.05 16 47 H 0.07 1.32 8.12 -51.93 -0.42 0.90 16 48 H 0.05 1.03 6.95 -51.93 -0.36 0.67 16 49 H 0.04 0.61 6.41 -51.93 -0.33 0.27 16 50 H 0.07 1.05 6.13 -51.93 -0.32 0.73 16 51 H 0.08 0.99 6.33 -51.93 -0.33 0.66 16 52 H 0.07 0.79 6.73 -51.93 -0.35 0.44 16 53 H 0.03 0.28 8.14 -51.92 -0.42 -0.14 16 54 H 0.07 0.69 6.12 -51.93 -0.32 0.38 16 LS Contribution 389.39 15.07 5.87 5.87 Total: -1.00 -28.67 389.39 -12.47 -41.14 By element: Atomic # 1 Polarization: 8.27 SS G_CDS: -10.35 Total: -2.07 kcal Atomic # 6 Polarization: -7.05 SS G_CDS: -0.52 Total: -7.58 kcal Atomic # 7 Polarization: -51.64 SS G_CDS: -2.45 Total: -54.09 kcal Atomic # 14 Polarization: 21.75 SS G_CDS: -5.02 Total: 16.73 kcal Total LS contribution 5.87 Total: 5.87 kcal Total: -28.67 -12.47 -41.14 kcal The number of atoms in the molecule is 54 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. ZINC001258014264.mol2 54 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 44.215 kcal (2) G-P(sol) polarization free energy of solvation -28.670 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 15.545 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -12.473 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.143 kcal (6) G-S(sol) free energy of system = (1) + (5) 3.072 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 4.50 seconds