Wall clock time and date at job start Sat Apr 11 2020 06:11:54 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 1.53000 * 1 3 3 O 1.42904 * 109.47191 * 2 1 4 4 C 1.42901 * 114.00015 * 184.25568 * 3 2 1 5 5 H 1.09003 * 109.47350 * 349.86450 * 4 3 2 6 6 C 1.53007 * 109.46766 * 109.85867 * 4 3 2 7 7 C 1.53004 * 109.47151 * 295.64528 * 6 4 3 8 8 C 1.50693 * 109.47185 * 229.85808 * 4 3 2 9 9 O 1.21276 * 119.99980 * 355.42964 * 8 4 3 10 10 N 1.34779 * 119.99717 * 175.15618 * 8 4 3 11 11 C 1.46932 * 120.64456 * 356.18759 * 10 8 4 12 12 C 1.53629 * 108.53184 * 126.29777 * 11 10 8 13 13 C 1.52991 * 109.27364 * 54.81241 * 12 11 10 14 14 C 1.52989 * 109.63515 * 298.65433 * 13 12 11 15 15 C 1.46931 * 120.63858 * 176.47508 * 10 8 4 16 16 C 1.53260 * 109.36412 * 178.71174 * 13 12 11 17 17 N 1.47149 * 108.41281 * 187.91114 * 16 13 12 18 18 C 1.36936 * 120.98888 * 230.49522 * 17 16 13 19 19 H 1.08001 * 119.99856 * 27.87025 * 18 17 16 20 20 C 1.38811 * 119.99902 * 207.87495 * 18 17 16 21 21 N 1.31616 * 120.00247 * 14.49471 * 20 18 17 22 22 Si 1.86798 * 119.99713 * 194.49497 * 20 18 17 23 23 H 1.48497 * 109.47214 * 94.98281 * 22 20 18 24 24 H 1.48501 * 109.47526 * 214.98109 * 22 20 18 25 25 H 1.48506 * 109.47541 * 334.98347 * 22 20 18 26 26 C 1.47150 * 118.02316 * 50.47869 * 17 16 13 27 27 C 1.53306 * 108.37366 * 309.40007 * 26 17 16 28 28 O 1.42897 * 109.55165 * 58.91459 * 13 12 11 29 29 H 1.08995 * 109.46988 * 60.00256 * 1 2 3 30 30 H 1.09002 * 109.47252 * 180.02562 * 1 2 3 31 31 H 1.09008 * 109.47109 * 300.00082 * 1 2 3 32 32 H 1.08995 * 109.47145 * 239.99567 * 2 1 3 33 33 H 1.09006 * 109.47333 * 119.99479 * 2 1 3 34 34 H 1.08993 * 109.47232 * 55.64762 * 6 4 3 35 35 H 1.09000 * 109.46632 * 175.64890 * 6 4 3 36 36 H 1.09000 * 109.47429 * 305.60169 * 7 6 4 37 37 H 1.09001 * 109.46712 * 65.60140 * 7 6 4 38 38 H 1.08998 * 109.47072 * 185.59671 * 7 6 4 39 39 H 1.08995 * 109.58789 * 246.12731 * 11 10 8 40 40 H 1.09005 * 109.58378 * 6.56422 * 11 10 8 41 41 H 1.08999 * 109.63106 * 294.80673 * 12 11 10 42 42 H 1.09002 * 109.42022 * 174.68601 * 12 11 10 43 43 H 1.09009 * 109.48910 * 301.24997 * 14 13 12 44 44 H 1.08999 * 109.51231 * 181.18505 * 14 13 12 45 45 H 1.08994 * 109.59007 * 353.43255 * 15 10 8 46 46 H 1.09001 * 109.58845 * 113.72167 * 15 10 8 47 47 H 1.08999 * 109.67604 * 307.64531 * 16 13 12 48 48 H 1.09008 * 109.67286 * 68.14107 * 16 13 12 49 49 H 0.96998 * 120.00165 * 179.97438 * 21 20 18 50 50 H 1.08994 * 109.69052 * 69.12733 * 26 17 16 51 51 H 1.09007 * 109.68055 * 189.68668 * 26 17 16 52 52 H 1.09000 * 109.50789 * 172.27845 * 27 26 17 53 53 H 1.09000 * 109.51150 * 292.43209 * 27 26 17 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 8 2.0064 1.3473 0.0000 4 6 3.4275 1.4613 -0.0969 5 1 3.8804 0.4777 0.0283 6 6 3.8015 2.0239 -1.4697 7 6 3.3860 1.0319 -2.5579 8 6 3.9317 2.3873 0.9798 9 8 3.1453 2.9638 1.7009 10 7 5.2568 2.5704 1.1449 11 6 6.2237 1.8120 0.3395 12 6 7.1788 2.8052 -0.3398 13 6 7.8139 3.7031 0.7238 14 6 6.7228 4.4982 1.4435 15 6 5.7623 3.5278 2.1382 16 6 8.7915 4.6735 0.0518 17 7 9.5284 5.3929 1.1029 18 6 9.6227 6.7590 1.0889 19 1 8.8450 7.3492 0.6270 20 6 10.7178 7.3850 1.6682 21 7 11.7905 6.6860 1.9728 22 14 10.6689 9.2198 2.0155 23 1 10.2434 9.4466 3.4200 24 1 12.0204 9.7991 1.8081 25 1 9.7039 9.8725 1.0945 26 6 10.1607 4.6008 2.1696 27 6 9.1146 3.6361 2.7400 28 8 8.5215 2.8980 1.6688 29 1 -0.3633 0.5138 -0.8900 30 1 -0.3634 -1.0277 0.0005 31 1 -0.3634 0.5139 0.8900 32 1 1.8933 -0.5139 -0.8899 33 1 1.8934 -0.5138 0.8901 34 1 3.2868 2.9718 -1.6264 35 1 4.8788 2.1834 -1.5157 36 1 3.8221 0.0557 -2.3455 37 1 2.2994 0.9479 -2.5772 38 1 3.7403 1.3852 -3.5262 39 1 6.7894 1.1399 0.9847 40 1 5.6946 1.2349 -0.4189 41 1 6.6247 3.4188 -1.0501 42 1 7.9598 2.2555 -0.8652 43 1 6.1723 5.0984 0.7190 44 1 7.1791 5.1525 2.1862 45 1 4.9287 4.0835 2.5675 46 1 6.2891 2.9915 2.9276 47 1 9.4911 4.1167 -0.5715 48 1 8.2388 5.3847 -0.5622 49 1 12.5559 7.1236 2.3773 50 1 10.9973 4.0348 1.7601 51 1 10.5165 5.2643 2.9579 52 1 9.5952 2.9471 3.4346 53 1 8.3437 4.2025 3.2625 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 ZINC001717345358.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 06:11:54 Heat of formation + Delta-G solvation = -98.037596 kcal Electronic energy + Delta-G solvation = -32354.005858 eV Core-core repulsion = 28226.792370 eV Total energy + Delta-G solvation = -4127.213488 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.84 seconds Orbital eigenvalues (eV) -40.68993 -39.29136 -37.88035 -36.17224 -34.43565 -34.00833 -32.45155 -31.25772 -31.16453 -30.91919 -28.59074 -27.46197 -26.28797 -23.74902 -23.44755 -23.07325 -22.84049 -22.04389 -21.09009 -19.57043 -18.54726 -17.58742 -17.04663 -16.85387 -16.00258 -15.86600 -15.34650 -15.22610 -14.94514 -14.68310 -14.44457 -14.27305 -14.26280 -13.83010 -13.77915 -13.43245 -13.15210 -12.84172 -12.73028 -12.67386 -12.58490 -12.41875 -12.08703 -11.97544 -11.92767 -11.55241 -11.50896 -11.45285 -11.15867 -11.07738 -10.98922 -10.93494 -10.73069 -10.58063 -10.24942 -10.19737 -10.15857 -9.98306 -9.50537 -9.28721 -9.01710 -8.58304 -8.47330 -6.71611 -5.84912 -3.30683 2.57669 2.77396 3.33221 3.40808 3.41700 3.58423 4.24411 4.34211 4.42187 4.54019 4.58157 4.78719 4.80908 4.91360 4.94557 4.99223 5.06355 5.16476 5.24762 5.31172 5.32105 5.34567 5.37670 5.41454 5.47748 5.55260 5.62394 5.66100 5.71413 5.77490 5.83824 5.87566 5.94097 5.99286 6.04867 6.10802 6.12722 6.20706 6.37791 6.40240 6.46784 6.54692 6.69266 6.78228 6.89924 7.12634 7.44595 7.52259 7.70490 7.92332 8.20464 8.33847 9.11336 9.73471 10.31099 11.22617 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.022491 B = 0.002669 C = 0.002638 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1244.626989 B =10487.965633 C =10612.152169 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.150 4.150 2 C 0.053 3.947 3 O -0.355 6.355 4 C 0.077 3.923 5 H 0.085 0.915 6 C -0.143 4.143 7 C -0.150 4.150 8 C 0.506 3.494 9 O -0.528 6.528 10 N -0.604 5.604 11 C 0.104 3.896 12 C -0.119 4.119 13 C 0.107 3.893 14 C -0.149 4.149 15 C 0.119 3.881 16 C 0.127 3.873 17 N -0.591 5.591 18 C -0.252 4.252 19 H 0.067 0.933 20 C 0.003 3.997 21 N -0.904 5.904 22 Si 0.904 3.096 23 H -0.287 1.287 24 H -0.291 1.291 25 H -0.278 1.278 26 C 0.142 3.858 27 C 0.035 3.965 28 O -0.382 6.382 29 H 0.063 0.937 30 H 0.070 0.930 31 H 0.065 0.935 32 H 0.051 0.949 33 H 0.048 0.952 34 H 0.078 0.922 35 H 0.088 0.912 36 H 0.053 0.947 37 H 0.059 0.941 38 H 0.062 0.938 39 H 0.079 0.921 40 H 0.083 0.917 41 H 0.078 0.922 42 H 0.082 0.918 43 H 0.068 0.932 44 H 0.094 0.906 45 H 0.086 0.914 46 H 0.069 0.931 47 H 0.025 0.975 48 H 0.059 0.941 49 H 0.254 0.746 50 H 0.026 0.974 51 H 0.092 0.908 52 H 0.078 0.922 53 H 0.044 0.956 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -15.151 -15.597 -5.932 22.539 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 -0.207 4.207 2 C -0.024 4.024 3 O -0.273 6.273 4 C 0.015 3.985 5 H 0.103 0.897 6 C -0.181 4.181 7 C -0.208 4.208 8 C 0.292 3.708 9 O -0.403 6.403 10 N -0.339 5.339 11 C -0.019 4.019 12 C -0.157 4.157 13 C 0.065 3.935 14 C -0.187 4.187 15 C -0.003 4.003 16 C 0.000 4.000 17 N -0.315 5.315 18 C -0.382 4.382 19 H 0.085 0.915 20 C -0.196 4.196 21 N -0.548 5.548 22 Si 0.734 3.266 23 H -0.214 1.214 24 H -0.217 1.217 25 H -0.204 1.204 26 C 0.016 3.984 27 C -0.042 4.042 28 O -0.301 6.301 29 H 0.082 0.918 30 H 0.089 0.911 31 H 0.084 0.916 32 H 0.069 0.931 33 H 0.066 0.934 34 H 0.097 0.903 35 H 0.107 0.893 36 H 0.072 0.928 37 H 0.078 0.922 38 H 0.081 0.919 39 H 0.098 0.902 40 H 0.101 0.899 41 H 0.096 0.904 42 H 0.101 0.899 43 H 0.086 0.914 44 H 0.112 0.888 45 H 0.104 0.896 46 H 0.087 0.913 47 H 0.043 0.957 48 H 0.077 0.923 49 H 0.065 0.935 50 H 0.044 0.956 51 H 0.110 0.890 52 H 0.096 0.904 53 H 0.062 0.938 Dipole moment (debyes) X Y Z Total from point charges -15.539 -15.237 -5.479 22.442 hybrid contribution 0.497 1.034 0.232 1.170 sum -15.042 -14.203 -5.247 21.344 Atomic orbital electron populations 1.21723 0.93506 1.02136 1.03382 1.22658 0.95967 0.83747 1.00006 1.88038 1.18626 1.26166 1.94423 1.21972 0.83582 0.98736 0.94164 0.89686 1.22100 1.02702 1.00726 0.92560 1.21768 1.01968 0.98628 0.98393 1.20680 0.82089 0.83102 0.84890 1.90690 1.54911 1.48792 1.45940 1.48119 1.04851 1.41805 1.39123 1.21981 0.90795 0.94259 0.94815 1.21965 0.98454 0.98020 0.97283 1.21785 0.91280 0.91040 0.89370 1.22358 0.96448 0.98162 1.01727 1.21577 0.97617 0.90657 0.90454 1.21515 0.93307 0.93767 0.91420 1.44020 1.61483 1.02561 1.23441 1.19183 1.02250 0.81162 1.35570 0.91525 1.25081 0.94653 0.97908 1.01910 1.70006 1.03730 1.35061 1.46005 0.86244 0.76958 0.85086 0.78307 1.21413 1.21709 1.20356 1.21411 0.91716 0.92503 0.92757 1.23340 0.96597 0.95464 0.88832 1.87761 1.70554 1.34213 1.37597 0.91810 0.91117 0.91630 0.93083 0.93417 0.90296 0.89339 0.92781 0.92161 0.91935 0.90226 0.89886 0.90392 0.89931 0.91350 0.88786 0.89578 0.91260 0.95706 0.92299 0.93549 0.95586 0.88955 0.90358 0.93789 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. 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 -1.13 10.28 37.16 0.38 -0.74 16 2 C 0.05 0.46 6.10 37.16 0.23 0.68 16 3 O -0.35 -4.35 9.15 -55.10 -0.50 -4.86 16 4 C 0.08 0.84 1.82 -27.88 -0.05 0.79 16 5 H 0.09 0.74 7.02 -51.93 -0.36 0.37 16 6 C -0.14 -1.31 5.18 -26.73 -0.14 -1.45 16 7 C -0.15 -1.06 9.00 37.16 0.33 -0.72 16 8 C 0.51 7.35 7.10 -10.99 -0.08 7.27 16 9 O -0.53 -9.88 15.93 -14.31 -0.23 -10.11 16 10 N -0.60 -8.14 2.97 -172.49 -0.51 -8.65 16 11 C 0.10 1.15 5.27 -3.48 -0.02 1.13 16 12 C -0.12 -1.48 4.88 -26.41 -0.13 -1.61 16 13 C 0.11 1.74 0.68 -90.50 -0.06 1.68 16 14 C -0.15 -2.43 4.33 -26.64 -0.12 -2.54 16 15 C 0.12 1.79 6.18 -3.71 -0.02 1.77 16 16 C 0.13 2.53 5.39 -3.55 -0.02 2.51 16 17 N -0.59 -14.19 2.55 -171.84 -0.44 -14.63 16 18 C -0.25 -6.67 9.65 -15.06 -0.15 -6.82 16 19 H 0.07 1.74 7.87 -52.49 -0.41 1.33 16 20 C 0.00 0.09 4.99 -17.43 -0.09 0.00 16 21 N -0.90 -25.60 11.11 55.49 0.62 -24.98 16 22 Si 0.90 21.34 29.58 -169.99 -5.03 16.31 16 23 H -0.29 -6.78 7.11 56.52 0.40 -6.37 16 24 H -0.29 -6.95 7.11 56.52 0.40 -6.55 16 25 H -0.28 -6.45 7.11 56.52 0.40 -6.05 16 26 C 0.14 3.27 5.42 -3.53 -0.02 3.25 16 27 C 0.04 0.66 6.60 37.32 0.25 0.90 16 28 O -0.38 -6.74 9.00 -35.23 -0.32 -7.06 16 29 H 0.06 0.47 8.14 -51.93 -0.42 0.05 16 30 H 0.07 0.38 8.14 -51.93 -0.42 -0.05 16 31 H 0.06 0.56 8.14 -51.92 -0.42 0.14 16 32 H 0.05 0.34 7.15 -51.93 -0.37 -0.03 16 33 H 0.05 0.40 8.14 -51.93 -0.42 -0.02 16 34 H 0.08 0.84 8.14 -51.93 -0.42 0.42 16 35 H 0.09 0.75 4.75 -51.93 -0.25 0.50 16 36 H 0.05 0.31 8.14 -51.93 -0.42 -0.11 16 37 H 0.06 0.45 7.47 -51.93 -0.39 0.06 16 38 H 0.06 0.40 8.14 -51.93 -0.42 -0.03 16 39 H 0.08 0.92 7.82 -51.93 -0.41 0.51 16 40 H 0.08 0.69 4.38 -51.93 -0.23 0.46 16 41 H 0.08 0.90 7.60 -51.93 -0.39 0.50 16 42 H 0.08 0.96 8.14 -51.93 -0.42 0.54 16 43 H 0.07 1.12 8.14 -51.92 -0.42 0.70 16 44 H 0.09 1.76 6.16 -51.93 -0.32 1.44 16 45 H 0.09 1.39 7.03 -51.93 -0.36 1.03 16 46 H 0.07 1.05 7.83 -51.93 -0.41 0.65 16 47 H 0.03 0.52 8.14 -51.93 -0.42 0.09 16 48 H 0.06 1.15 7.95 -51.92 -0.41 0.74 16 49 H 0.25 6.99 8.31 -40.82 -0.34 6.65 16 50 H 0.03 0.65 8.14 -51.93 -0.42 0.23 16 51 H 0.09 2.36 6.19 -51.92 -0.32 2.04 16 52 H 0.08 1.30 8.14 -51.93 -0.42 0.88 16 53 H 0.04 0.81 6.29 -51.93 -0.33 0.48 16 LS Contribution 395.98 15.07 5.97 5.97 Total: -1.00 -31.99 395.98 -9.31 -41.29 By element: Atomic # 1 Polarization: 9.77 SS G_CDS: -9.17 Total: 0.60 kcal Atomic # 6 Polarization: 5.81 SS G_CDS: 0.30 Total: 6.12 kcal Atomic # 7 Polarization: -47.93 SS G_CDS: -0.33 Total: -48.26 kcal Atomic # 8 Polarization: -20.98 SS G_CDS: -1.05 Total: -22.03 kcal Atomic # 14 Polarization: 21.34 SS G_CDS: -5.03 Total: 16.31 kcal Total LS contribution 5.97 Total: 5.97 kcal Total: -31.99 -9.31 -41.29 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. ZINC001717345358.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 -56.743 kcal (2) G-P(sol) polarization free energy of solvation -31.986 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -88.728 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.309 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.295 kcal (6) G-S(sol) free energy of system = (1) + (5) -98.038 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.84 seconds