Wall clock time and date at job start Wed Apr 1 2020 02:10:39 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= -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 1.50697 * 1 3 3 C 1.38262 * 119.99738 * 2 1 4 4 C 1.38209 * 120.00111 * 179.97438 * 3 2 1 5 5 C 1.38259 * 120.00229 * 0.02562 * 4 3 2 6 6 C 1.38223 * 119.99597 * 359.70413 * 5 4 3 7 7 C 1.38213 * 120.00368 * 179.97438 * 2 1 3 8 8 C 1.50693 * 119.99855 * 359.97438 * 7 2 1 9 9 H 1.08999 * 115.56817 * 334.31701 * 8 7 2 10 10 C 1.53073 * 117.49324 * 188.60260 * 8 7 2 11 11 C 1.52996 * 59.98707 * 252.51673 * 10 8 7 12 12 H 1.09005 * 117.50184 * 107.49582 * 11 10 8 13 13 C 1.50704 * 117.50041 * 252.50186 * 11 10 8 14 14 O 1.21279 * 120.00192 * 68.74187 * 13 11 10 15 15 N 1.34773 * 119.99674 * 248.74202 * 13 11 10 16 16 C 1.46925 * 120.63543 * 359.97438 * 15 13 11 17 17 C 1.53184 * 108.77814 * 233.63175 * 16 15 13 18 18 C 1.53043 * 109.31371 * 305.35995 * 17 16 15 19 19 C 1.53043 * 109.53442 * 61.36785 * 18 17 16 20 20 H 1.08992 * 109.52365 * 58.60408 * 19 18 17 21 21 C 1.53000 * 109.49628 * 178.68700 * 19 18 17 22 22 N 1.46499 * 109.46840 * 294.83366 * 21 19 18 23 23 C 1.36936 * 120.00002 * 180.02562 * 22 21 19 24 24 H 1.08004 * 120.00140 * 0.02562 * 23 22 21 25 25 C 1.38811 * 120.00367 * 180.02562 * 23 22 21 26 26 N 1.31619 * 119.99972 * 359.97438 * 25 23 22 27 27 Si 1.86800 * 120.00444 * 180.02562 * 25 23 22 28 28 H 1.48501 * 109.46864 * 359.97438 * 27 25 23 29 29 H 1.48494 * 109.47259 * 119.99588 * 27 25 23 30 30 H 1.48495 * 109.47205 * 239.99955 * 27 25 23 31 31 C 1.46932 * 120.62905 * 179.97438 * 15 13 11 32 32 H 1.08996 * 109.47135 * 270.01984 * 1 2 3 33 33 H 1.09001 * 109.47501 * 30.02868 * 1 2 3 34 34 H 1.09009 * 109.46519 * 150.02301 * 1 2 3 35 35 H 1.08003 * 119.99529 * 359.97438 * 3 2 1 36 36 H 1.07994 * 120.00289 * 179.97438 * 4 3 2 37 37 H 1.07993 * 120.00297 * 179.97438 * 5 4 3 38 38 H 1.07993 * 119.99626 * 180.29783 * 6 5 4 39 39 H 1.09002 * 117.51248 * 145.04346 * 10 8 7 40 40 H 1.08998 * 117.51464 * 359.97438 * 10 8 7 41 41 H 1.08998 * 109.58627 * 353.41976 * 16 15 13 42 42 H 1.09006 * 109.58550 * 113.83826 * 16 15 13 43 43 H 1.09001 * 109.50334 * 65.31372 * 17 16 15 44 44 H 1.09003 * 109.49982 * 185.38551 * 17 16 15 45 45 H 1.08998 * 109.46287 * 301.35034 * 18 17 16 46 46 H 1.08999 * 109.46207 * 181.38654 * 18 17 16 47 47 H 1.09002 * 109.47398 * 54.83692 * 21 19 18 48 48 H 1.09001 * 109.47194 * 174.83873 * 21 19 18 49 49 H 0.97000 * 120.00420 * 0.02562 * 22 21 19 50 50 H 0.96996 * 120.00586 * 180.02562 * 26 25 23 51 51 H 1.08991 * 109.58462 * 6.58497 * 31 15 13 52 52 H 1.08996 * 109.70368 * 246.22645 * 31 15 13 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 1.5070 0.0000 0.0000 3 6 2.1982 1.1974 0.0000 4 6 3.5803 1.1975 0.0005 5 6 4.2717 0.0002 0.0005 6 6 3.5807 -1.1968 0.0062 7 6 2.1981 -1.1969 0.0005 8 6 1.4447 -2.5020 0.0017 9 1 0.4422 -2.4661 0.4282 10 6 2.2542 -3.7851 0.2054 11 6 1.6788 -3.4539 -1.1731 12 1 2.3775 -3.1359 -1.9470 13 6 0.5058 -4.2699 -1.6519 14 8 -0.5733 -4.1565 -1.1101 15 7 0.6560 -5.1257 -2.6822 16 6 1.9568 -5.2737 -3.3490 17 6 1.7672 -5.0567 -4.8535 18 6 0.6847 -6.0075 -5.3696 19 6 -0.6405 -5.7038 -4.6670 20 1 -0.9218 -4.6672 -4.8523 21 6 -1.7295 -6.6329 -5.2071 22 7 -1.9679 -6.3353 -6.6216 23 6 -2.9067 -7.0448 -7.3218 24 1 -3.4717 -7.8236 -6.8312 25 6 -3.1322 -6.7632 -8.6622 26 7 -2.4440 -5.8138 -9.2601 27 14 -4.4134 -7.7306 -9.6173 28 1 -5.0442 -8.7340 -8.7226 29 1 -5.4524 -6.8027 -10.1315 30 1 -3.7616 -8.4246 -10.7569 31 6 -0.4781 -5.9285 -3.1599 32 1 -0.3633 0.0004 1.0276 33 1 -0.3634 0.8897 -0.5143 34 1 -0.3633 -0.8903 -0.5135 35 1 1.6581 2.1327 -0.0004 36 1 4.1203 2.1328 0.0001 37 1 5.3517 0.0003 0.0005 38 1 4.1207 -2.1320 0.0110 39 1 1.7843 -4.5933 0.7659 40 1 3.3315 -3.6851 0.3380 41 1 2.6542 -4.5328 -2.9580 42 1 2.3470 -6.2757 -3.1705 43 1 1.4638 -4.0260 -5.0371 44 1 2.7052 -5.2576 -5.3711 45 1 0.9774 -7.0371 -5.1634 46 1 0.5651 -5.8725 -6.4445 47 1 -1.4076 -7.6691 -5.1030 48 1 -2.6499 -6.4800 -4.6436 49 1 -1.4607 -5.6356 -7.0622 50 1 -2.6018 -5.6167 -10.1966 51 1 -1.3873 -5.6196 -2.6443 52 1 -0.2886 -6.9842 -2.9660 RHF calculation, no. of doubly occupied orbitals= 65 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 ZINC001491180163.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 02:10:39 Heat of formation + Delta-G solvation = 15.184809 kcal Electronic energy + Delta-G solvation = -29412.516292 eV Core-core repulsion = 25570.209938 eV Total energy + Delta-G solvation = -3842.306355 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.19 seconds Orbital eigenvalues (eV) -40.74427 -39.72739 -37.94452 -36.38367 -34.95818 -33.11493 -32.74547 -31.69981 -30.90906 -29.93945 -27.18851 -26.17040 -25.54645 -24.30117 -23.71941 -22.59536 -21.76170 -21.70121 -20.52516 -19.79728 -18.83384 -17.75422 -17.11365 -16.61597 -16.22202 -15.52331 -15.32929 -15.06077 -14.77202 -14.45223 -14.29644 -14.16456 -14.06825 -13.91975 -13.61853 -13.35289 -13.07735 -12.90443 -12.78055 -12.50763 -12.49102 -12.41225 -12.17949 -12.06760 -11.83587 -11.44858 -11.19989 -11.04836 -10.92367 -10.87487 -10.83289 -10.72836 -10.58864 -10.33325 -10.17240 -9.99838 -9.78026 -9.64806 -9.05486 -8.86768 -8.74636 -8.57885 -6.90079 -5.75442 -3.03650 0.99685 1.09915 2.41776 2.89835 3.33156 3.44259 3.50017 3.52207 3.76637 4.14839 4.39458 4.48990 4.54525 4.60609 4.63601 4.70196 4.74417 4.82388 4.92746 5.02204 5.05587 5.06943 5.19155 5.24107 5.33533 5.36917 5.40670 5.44581 5.51193 5.57828 5.60170 5.61113 5.63762 5.76481 5.81004 5.85190 5.89553 5.96441 6.00691 6.09623 6.19332 6.22029 6.22344 6.23600 6.40183 6.47561 6.55295 6.67531 6.71968 6.81122 6.91130 7.39011 7.72179 8.14500 8.43665 9.54882 10.12921 10.47701 11.47657 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.017576 B = 0.002023 C = 0.001980 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1592.703127 B =13834.681003 C =14139.128698 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.122 4.122 2 C -0.072 4.072 3 C -0.119 4.119 4 C -0.120 4.120 5 C -0.125 4.125 6 C -0.116 4.116 7 C -0.054 4.054 8 C -0.084 4.084 9 H 0.129 0.871 10 C -0.145 4.145 11 C -0.176 4.176 12 H 0.126 0.874 13 C 0.544 3.456 14 O -0.543 6.543 15 N -0.603 5.603 16 C 0.107 3.893 17 C -0.137 4.137 18 C -0.111 4.111 19 C -0.106 4.106 20 H 0.073 0.927 21 C 0.160 3.840 22 N -0.731 5.731 23 C -0.237 4.237 24 H 0.071 0.929 25 C -0.016 4.016 26 N -0.934 5.934 27 Si 0.907 3.093 28 H -0.280 1.280 29 H -0.292 1.292 30 H -0.292 1.292 31 C 0.119 3.881 32 H 0.071 0.929 33 H 0.066 0.934 34 H 0.076 0.924 35 H 0.122 0.878 36 H 0.120 0.880 37 H 0.121 0.879 38 H 0.123 0.877 39 H 0.104 0.896 40 H 0.107 0.893 41 H 0.082 0.918 42 H 0.069 0.931 43 H 0.066 0.934 44 H 0.073 0.927 45 H 0.061 0.939 46 H 0.079 0.921 47 H 0.020 0.980 48 H 0.020 0.980 49 H 0.384 0.616 50 H 0.254 0.746 51 H 0.092 0.908 52 H 0.068 0.932 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 17.217 10.241 21.685 29.522 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 -0.179 4.179 2 C -0.072 4.072 3 C -0.137 4.137 4 C -0.138 4.138 5 C -0.143 4.143 6 C -0.134 4.134 7 C -0.054 4.054 8 C -0.103 4.103 9 H 0.147 0.853 10 C -0.182 4.182 11 C -0.197 4.197 12 H 0.144 0.856 13 C 0.332 3.668 14 O -0.420 6.420 15 N -0.335 5.335 16 C -0.016 4.016 17 C -0.175 4.175 18 C -0.149 4.149 19 C -0.126 4.126 20 H 0.092 0.908 21 C 0.032 3.968 22 N -0.375 5.375 23 C -0.368 4.368 24 H 0.089 0.911 25 C -0.211 4.211 26 N -0.583 5.583 27 Si 0.738 3.262 28 H -0.206 1.206 29 H -0.219 1.219 30 H -0.219 1.219 31 C -0.004 4.004 32 H 0.090 0.910 33 H 0.085 0.915 34 H 0.094 0.906 35 H 0.140 0.860 36 H 0.138 0.862 37 H 0.139 0.861 38 H 0.141 0.859 39 H 0.123 0.877 40 H 0.126 0.874 41 H 0.100 0.900 42 H 0.088 0.912 43 H 0.085 0.915 44 H 0.092 0.908 45 H 0.079 0.921 46 H 0.098 0.902 47 H 0.038 0.962 48 H 0.038 0.962 49 H 0.218 0.782 50 H 0.064 0.936 51 H 0.110 0.890 52 H 0.086 0.914 Dipole moment (debyes) X Y Z Total from point charges 16.497 10.159 21.929 29.261 hybrid contribution -0.373 -0.237 -1.012 1.105 sum 16.124 9.921 20.916 28.212 Atomic orbital electron populations 1.20892 0.90939 1.03518 1.02544 1.19777 0.96313 0.92321 0.98770 1.21051 0.94290 0.97447 1.00957 1.21139 0.94313 0.98090 1.00277 1.21090 0.99795 0.92434 1.00964 1.21041 0.93491 0.98316 1.00580 1.18981 0.92992 0.92700 1.00722 1.21105 1.00868 0.87833 1.00482 0.85344 1.23136 1.00285 0.98933 0.95824 1.22382 1.00417 1.03371 0.93532 0.85601 1.19549 0.88575 0.79152 0.79565 1.90686 1.27541 1.66812 1.56997 1.48019 1.11693 1.41264 1.32495 1.21821 0.84366 1.02051 0.93329 1.21963 1.00079 1.01027 0.94413 1.21529 0.93347 0.98511 1.01495 1.21675 0.96372 1.01394 0.93144 0.90832 1.20588 0.94040 0.95208 0.87001 1.42352 1.46312 1.43613 1.05225 1.19287 1.12489 1.12758 0.92268 0.91127 1.24739 1.00212 0.99243 0.96945 1.69666 1.43872 1.33550 1.11231 0.86111 0.81010 0.79105 0.79954 1.20559 1.21893 1.21913 1.21664 0.89434 0.94494 0.94760 0.91018 0.91478 0.90561 0.85996 0.86151 0.86105 0.85892 0.87714 0.87449 0.89972 0.91230 0.91549 0.90811 0.92060 0.90236 0.96172 0.96188 0.78232 0.93604 0.89012 0.91391 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 -0.12 -1.09 9.33 36.00 0.34 -0.75 16 2 C -0.07 -0.68 5.88 -104.62 -0.62 -1.30 16 3 C -0.12 -1.01 9.70 -39.58 -0.38 -1.39 16 4 C -0.12 -0.93 10.05 -39.58 -0.40 -1.32 16 5 C -0.12 -0.94 10.05 -39.58 -0.40 -1.34 16 6 C -0.12 -0.94 9.30 -39.58 -0.37 -1.31 16 7 C -0.05 -0.51 5.61 -104.63 -0.59 -1.09 16 8 C -0.08 -0.82 4.66 -91.74 -0.43 -1.25 16 9 H 0.13 1.43 6.43 -51.93 -0.33 1.09 16 10 C -0.14 -1.15 9.57 -26.70 -0.26 -1.40 16 11 C -0.18 -1.74 4.76 -91.77 -0.44 -2.18 16 12 H 0.13 1.09 6.57 -51.93 -0.34 0.75 16 13 C 0.54 7.30 7.48 -10.99 -0.08 7.22 16 14 O -0.54 -9.17 15.67 5.56 0.09 -9.09 16 15 N -0.60 -7.67 2.97 -172.75 -0.51 -8.18 16 16 C 0.11 1.06 6.35 -3.72 -0.02 1.04 16 17 C -0.14 -1.57 6.08 -26.61 -0.16 -1.73 16 18 C -0.11 -1.65 5.06 -26.69 -0.13 -1.79 16 19 C -0.11 -1.75 2.38 -90.48 -0.21 -1.96 16 20 H 0.07 1.34 8.14 -51.93 -0.42 0.92 16 21 C 0.16 3.24 5.65 -4.04 -0.02 3.22 16 22 N -0.73 -18.61 5.32 -59.91 -0.32 -18.93 16 23 C -0.24 -6.70 9.99 -15.06 -0.15 -6.85 16 24 H 0.07 1.95 7.83 -52.48 -0.41 1.54 16 25 C -0.02 -0.46 5.50 -17.43 -0.10 -0.55 16 26 N -0.93 -28.43 13.06 55.49 0.72 -27.71 16 27 Si 0.91 22.65 29.55 -169.99 -5.02 17.62 16 28 H -0.28 -6.78 7.11 56.52 0.40 -6.38 16 29 H -0.29 -7.33 7.11 56.52 0.40 -6.93 16 30 H -0.29 -7.29 7.11 56.52 0.40 -6.89 16 31 C 0.12 1.72 5.72 -3.69 -0.02 1.70 16 32 H 0.07 0.56 8.14 -51.93 -0.42 0.14 16 33 H 0.07 0.53 8.09 -51.93 -0.42 0.11 16 34 H 0.08 0.79 6.65 -51.92 -0.35 0.44 16 35 H 0.12 0.82 8.06 -52.48 -0.42 0.40 16 36 H 0.12 0.68 8.06 -52.49 -0.42 0.26 16 37 H 0.12 0.66 8.06 -52.49 -0.42 0.24 16 38 H 0.12 0.76 6.02 -52.49 -0.32 0.45 16 39 H 0.10 0.86 8.14 -51.93 -0.42 0.44 16 40 H 0.11 0.62 6.17 -51.93 -0.32 0.30 16 41 H 0.08 0.64 5.51 -51.93 -0.29 0.35 16 42 H 0.07 0.62 8.14 -51.93 -0.42 0.20 16 43 H 0.07 0.82 8.14 -51.93 -0.42 0.40 16 44 H 0.07 0.72 8.14 -51.93 -0.42 0.30 16 45 H 0.06 0.87 8.14 -51.93 -0.42 0.45 16 46 H 0.08 1.40 7.16 -51.93 -0.37 1.03 16 47 H 0.02 0.41 8.14 -51.93 -0.42 -0.01 16 48 H 0.02 0.42 8.14 -51.93 -0.42 0.00 16 49 H 0.38 10.22 6.86 -40.82 -0.28 9.94 16 50 H 0.25 7.46 8.31 -40.82 -0.34 7.12 16 51 H 0.09 1.47 7.00 -51.93 -0.36 1.11 16 52 H 0.07 0.90 8.14 -51.93 -0.42 0.48 16 LS Contribution 409.19 15.07 6.17 6.17 Total: -1.00 -33.19 409.19 -11.74 -44.93 By element: Atomic # 1 Polarization: 16.66 SS G_CDS: -8.42 Total: 8.24 kcal Atomic # 6 Polarization: -8.62 SS G_CDS: -4.44 Total: -13.06 kcal Atomic # 7 Polarization: -54.72 SS G_CDS: -0.11 Total: -54.82 kcal Atomic # 8 Polarization: -9.17 SS G_CDS: 0.09 Total: -9.09 kcal Atomic # 14 Polarization: 22.65 SS G_CDS: -5.02 Total: 17.62 kcal Total LS contribution 6.17 Total: 6.17 kcal Total: -33.19 -11.74 -44.93 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. ZINC001491180163.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 60.118 kcal (2) G-P(sol) polarization free energy of solvation -33.193 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 26.925 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.740 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.933 kcal (6) G-S(sol) free energy of system = (1) + (5) 15.185 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.20 seconds