Wall clock time and date at job start Tue Mar 31 2020 12:38:39 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 1.53002 * 1 3 3 C 1.53001 * 109.47357 * 2 1 4 4 O 1.42902 * 109.47002 * 119.99975 * 2 1 3 5 5 C 1.35899 * 116.99951 * 157.45511 * 4 2 1 6 6 C 1.38746 * 120.05686 * 356.50108 * 5 4 2 7 7 C 1.38128 * 119.94399 * 179.69866 * 6 5 4 8 8 C 1.38290 * 120.05438 * 0.59982 * 7 6 5 9 9 C 1.38239 * 120.11077 * 359.67757 * 8 7 6 10 10 C 1.50702 * 119.97449 * 180.02562 * 9 8 7 11 11 N 1.46897 * 109.47430 * 269.98168 * 10 9 8 12 12 C 1.46907 * 111.00102 * 75.30798 * 11 10 9 13 13 C 1.46893 * 111.00041 * 199.27021 * 11 10 9 14 14 C 1.52998 * 109.47411 * 87.43246 * 13 11 10 15 15 C 1.53005 * 109.46917 * 300.05077 * 14 13 11 16 16 C 1.52998 * 109.47228 * 60.04895 * 14 13 11 17 17 C 1.53007 * 109.47079 * 180.02562 * 14 13 11 18 18 C 1.50701 * 109.46753 * 180.02562 * 17 14 13 19 19 H 1.08000 * 120.00131 * 359.97438 * 18 17 14 20 20 C 1.37881 * 119.99717 * 180.02562 * 18 17 14 21 21 N 1.31514 * 119.99704 * 359.97438 * 20 18 17 22 22 Si 1.86798 * 120.00059 * 179.97438 * 20 18 17 23 23 H 1.48498 * 109.46885 * 89.99793 * 22 20 18 24 24 H 1.48489 * 109.47071 * 209.99754 * 22 20 18 25 25 H 1.48501 * 109.46816 * 330.00146 * 22 20 18 26 26 C 1.38171 * 120.05774 * 0.02562 * 9 8 7 27 27 H 1.08995 * 109.46865 * 300.00306 * 1 2 3 28 28 H 1.08998 * 109.46888 * 59.99740 * 1 2 3 29 29 H 1.08993 * 109.47067 * 179.97438 * 1 2 3 30 30 H 1.08998 * 109.47318 * 239.99506 * 2 1 3 31 31 H 1.08998 * 109.47333 * 299.99987 * 3 2 1 32 32 H 1.09004 * 109.46916 * 59.99694 * 3 2 1 33 33 H 1.09000 * 109.47181 * 179.97438 * 3 2 1 34 34 H 1.07995 * 120.02989 * 359.97438 * 6 5 4 35 35 H 1.08002 * 119.97389 * 180.30443 * 7 6 5 36 36 H 1.08002 * 119.94510 * 179.70090 * 8 7 6 37 37 H 1.09001 * 109.46821 * 29.98126 * 10 9 8 38 38 H 1.08999 * 109.47339 * 149.97593 * 10 9 8 39 39 H 1.08996 * 109.46628 * 54.76238 * 12 11 10 40 40 H 1.08999 * 109.46542 * 174.75794 * 12 11 10 41 41 H 1.08994 * 109.47336 * 294.75824 * 12 11 10 42 42 H 1.09003 * 109.46855 * 207.43357 * 13 11 10 43 43 H 1.08996 * 109.47484 * 327.42779 * 13 11 10 44 44 H 1.08995 * 109.46893 * 68.57803 * 15 14 13 45 45 H 1.09000 * 109.46710 * 188.57950 * 15 14 13 46 46 H 1.08994 * 109.46893 * 308.57532 * 15 14 13 47 47 H 1.08998 * 109.47150 * 65.11921 * 16 14 13 48 48 H 1.08999 * 109.47483 * 185.11991 * 16 14 13 49 49 H 1.09002 * 109.47107 * 305.12284 * 16 14 13 50 50 H 1.09000 * 109.46719 * 299.99463 * 17 14 13 51 51 H 1.08998 * 109.47041 * 59.99806 * 17 14 13 52 52 H 0.97004 * 119.99815 * 180.02562 * 21 20 18 53 53 H 1.07996 * 120.02968 * 180.02562 * 26 9 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 6 1.5300 0.0000 0.0000 3 6 2.0401 1.4425 0.0000 4 8 2.0063 -0.6736 1.1668 5 6 3.2664 -1.1802 1.1156 6 6 4.0020 -1.0959 -0.0577 7 6 5.2848 -1.6060 -0.1053 8 6 5.8314 -2.2113 1.0115 9 6 5.0983 -2.3015 2.1800 10 6 5.6971 -2.9613 3.3955 11 7 5.3840 -4.3964 3.3780 12 6 6.2149 -5.1047 2.3952 13 6 5.5342 -4.9842 4.7158 14 6 4.2231 -4.8329 5.4896 15 6 3.8762 -3.3484 5.6198 16 6 3.1019 -5.5547 4.7395 17 6 4.3799 -5.4447 6.8833 18 6 3.0882 -5.2962 7.6452 19 1 2.2404 -4.8133 7.1820 20 6 2.9891 -5.7758 8.9341 21 7 4.0216 -6.3633 9.4983 22 14 1.3883 -5.5911 9.8789 23 1 0.5302 -6.7784 9.6358 24 1 1.6803 -5.4803 11.3306 25 1 0.6817 -4.3677 9.4212 26 6 3.8170 -1.7874 2.2346 27 1 -0.3633 0.5139 0.8899 28 1 -0.3633 0.5139 -0.8900 29 1 -0.3633 -1.0276 -0.0005 30 1 1.8934 -0.5139 -0.8899 31 1 1.6768 1.9564 -0.8900 32 1 1.6767 1.9563 0.8900 33 1 3.1301 1.4424 0.0005 34 1 3.5738 -0.6280 -0.9318 35 1 5.8597 -1.5363 -1.0170 36 1 6.8328 -2.6138 0.9709 37 1 6.7786 -2.8252 3.3869 38 1 5.2813 -2.5095 4.2961 39 1 7.2670 -4.9033 2.5967 40 1 6.0296 -6.1763 2.4679 41 1 5.9646 -4.7599 1.3920 42 1 5.7809 -6.0419 4.6222 43 1 6.3332 -4.4708 5.2507 44 1 3.6155 -2.9489 4.6398 45 1 3.0301 -3.2311 6.2969 46 1 4.7359 -2.8078 6.0156 47 1 3.3046 -6.6256 4.7259 48 1 2.1519 -5.3711 5.2415 49 1 3.0503 -5.1817 3.7166 50 1 4.6267 -6.5023 6.7900 51 1 5.1787 -4.9308 7.4179 52 1 3.9518 -6.7011 10.4049 53 1 3.2448 -1.8579 3.1479 RHF calculation, no. of doubly occupied orbitals= 62 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 ZINC000093864524.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 31 2020 12:38:39 Heat of formation + Delta-G solvation = -21.999095 kcal Electronic energy + Delta-G solvation = -27770.788638 eV Core-core repulsion = 24221.436582 eV Total energy + Delta-G solvation = -3549.352056 eV No. of doubly occupied orbitals = 62 Molecular weight (most abundant/longest-lived isotopes) = 319.225 amu Computer time = 0.79 seconds Orbital eigenvalues (eV) -40.41150 -38.77675 -37.39662 -34.91202 -33.42314 -32.19748 -31.52977 -29.75329 -27.68417 -27.48680 -26.89276 -26.24591 -25.86464 -23.63435 -22.81408 -22.40615 -21.36477 -20.11766 -18.08234 -17.86651 -16.29764 -16.10997 -15.98677 -15.64170 -15.12224 -14.94800 -14.72917 -14.40986 -13.99342 -13.94976 -13.56000 -13.09151 -12.99436 -12.90642 -12.80573 -12.58113 -12.48721 -12.35328 -11.98059 -11.95837 -11.85427 -11.74089 -11.55970 -11.26000 -11.15909 -10.96807 -10.83820 -10.71000 -10.60127 -10.53618 -10.33161 -10.27711 -9.94164 -9.53127 -8.89901 -8.82822 -8.78581 -8.26627 -8.18125 -7.90264 -5.91481 -3.90893 1.32116 1.47185 3.07176 3.37115 3.43459 3.46799 3.70618 4.41647 4.46501 4.55109 4.60923 4.69982 4.81277 4.86404 5.04707 5.17139 5.21830 5.31712 5.37358 5.41794 5.42975 5.44896 5.46410 5.55516 5.60836 5.70512 5.73635 5.80956 5.85353 5.94489 5.97246 6.03583 6.07081 6.14225 6.30564 6.34202 6.38723 6.41276 6.62182 6.68714 6.78758 6.79675 6.87888 6.94257 7.28129 7.30685 7.34411 7.42515 7.43753 7.54997 7.76650 7.92122 8.09530 8.54879 9.14696 9.71639 11.20278 Molecular weight = 319.23amu Principal moments of inertia in cm(-1) A = 0.013146 B = 0.003156 C = 0.002660 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2129.392539 B = 8869.200958 C =10522.207676 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.149 4.149 2 C 0.076 3.924 3 C -0.180 4.180 4 O -0.309 6.309 5 C 0.131 3.869 6 C -0.218 4.218 7 C -0.084 4.084 8 C -0.154 4.154 9 C -0.024 4.024 10 C 0.073 3.927 11 N -0.528 5.528 12 C 0.024 3.976 13 C 0.064 3.936 14 C -0.051 4.051 15 C -0.134 4.134 16 C -0.115 4.115 17 C 0.032 3.968 18 C -0.503 4.503 19 H 0.059 0.941 20 C 0.054 3.946 21 N -0.899 5.899 22 Si 0.886 3.114 23 H -0.282 1.282 24 H -0.289 1.289 25 H -0.274 1.274 26 C -0.132 4.132 27 H 0.067 0.933 28 H 0.074 0.926 29 H 0.066 0.934 30 H 0.072 0.928 31 H 0.069 0.931 32 H 0.067 0.933 33 H 0.062 0.938 34 H 0.124 0.876 35 H 0.119 0.881 36 H 0.117 0.883 37 H 0.040 0.960 38 H 0.104 0.896 39 H 0.019 0.981 40 H 0.065 0.935 41 H 0.064 0.936 42 H 0.065 0.935 43 H 0.034 0.966 44 H 0.045 0.955 45 H 0.063 0.937 46 H 0.036 0.964 47 H 0.036 0.964 48 H 0.051 0.949 49 H 0.046 0.954 50 H 0.013 0.987 51 H 0.012 0.988 52 H 0.258 0.742 53 H 0.135 0.865 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 1.019 12.516 -22.372 25.656 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 -0.206 4.206 2 C 0.020 3.980 3 C -0.237 4.237 4 O -0.223 6.223 5 C 0.086 3.914 6 C -0.236 4.236 7 C -0.102 4.102 8 C -0.173 4.173 9 C -0.025 4.025 10 C -0.054 4.054 11 N -0.251 5.251 12 C -0.125 4.125 13 C -0.063 4.063 14 C -0.051 4.051 15 C -0.191 4.191 16 C -0.173 4.173 17 C -0.005 4.005 18 C -0.542 4.542 19 H 0.077 0.923 20 C -0.146 4.146 21 N -0.539 5.539 22 Si 0.715 3.285 23 H -0.208 1.208 24 H -0.215 1.215 25 H -0.199 1.199 26 C -0.151 4.151 27 H 0.086 0.914 28 H 0.093 0.907 29 H 0.085 0.915 30 H 0.090 0.910 31 H 0.088 0.912 32 H 0.086 0.914 33 H 0.081 0.919 34 H 0.142 0.858 35 H 0.137 0.863 36 H 0.135 0.865 37 H 0.058 0.942 38 H 0.122 0.878 39 H 0.038 0.962 40 H 0.084 0.916 41 H 0.082 0.918 42 H 0.084 0.916 43 H 0.053 0.947 44 H 0.064 0.936 45 H 0.082 0.918 46 H 0.055 0.945 47 H 0.055 0.945 48 H 0.070 0.930 49 H 0.065 0.935 50 H 0.032 0.968 51 H 0.030 0.970 52 H 0.068 0.932 53 H 0.152 0.848 Dipole moment (debyes) X Y Z Total from point charges 0.446 12.368 -22.183 25.402 hybrid contribution 0.172 0.112 0.603 0.637 sum 0.619 12.480 -21.580 24.937 Atomic orbital electron populations 1.21842 0.92465 1.03328 1.02965 1.22404 0.95430 0.92441 0.87731 1.22371 1.02166 0.96125 1.03039 1.86164 1.27605 1.69304 1.39259 1.18968 0.84201 0.94174 0.94083 1.21162 0.96721 1.08195 0.97565 1.20822 0.94480 0.96840 0.98087 1.20941 1.00464 1.02817 0.93103 1.19610 0.92958 0.94826 0.95072 1.21532 0.97652 0.89304 0.96886 1.61904 1.54475 1.01068 1.07663 1.22477 0.94244 0.99120 0.96624 1.22374 0.98297 0.98432 0.87169 1.20553 0.92580 0.95425 0.96561 1.22009 1.01124 0.95998 0.99954 1.21580 0.98454 0.98674 0.98548 1.19146 0.96971 0.95435 0.88958 1.21249 0.98147 1.36786 0.98004 0.92258 1.25013 0.96099 0.95672 0.97847 1.69970 1.29717 1.39933 1.14289 0.86678 0.84246 0.78448 0.79150 1.20825 1.21451 1.19908 1.20416 0.95447 1.01406 0.97805 0.91355 0.90691 0.91509 0.91019 0.91203 0.91377 0.91878 0.85836 0.86285 0.86461 0.94209 0.87791 0.96245 0.91608 0.91755 0.91636 0.94743 0.93578 0.91768 0.94482 0.94479 0.93033 0.93538 0.96834 0.96990 0.93243 0.84772 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 -1.10 9.56 37.16 0.36 -0.75 16 2 C 0.08 0.68 2.87 -26.73 -0.08 0.60 16 3 C -0.18 -1.35 9.24 37.16 0.34 -1.01 16 4 O -0.31 -3.89 9.81 -19.42 -0.19 -4.08 16 5 C 0.13 1.69 6.53 -39.22 -0.26 1.43 16 6 C -0.22 -2.37 8.31 -39.43 -0.33 -2.70 16 7 C -0.08 -0.88 10.04 -39.60 -0.40 -1.28 16 8 C -0.15 -1.77 8.37 -39.56 -0.33 -2.10 16 9 C -0.02 -0.32 5.13 -104.65 -0.54 -0.85 16 10 C 0.07 1.02 4.16 -4.98 -0.02 1.00 16 11 N -0.53 -7.94 3.56 -244.38 -0.87 -8.81 16 12 C 0.02 0.30 9.21 60.07 0.55 0.86 16 13 C 0.06 1.12 4.23 -3.83 -0.02 1.10 16 14 C -0.05 -1.02 0.60 -154.50 -0.09 -1.12 16 15 C -0.13 -2.56 6.71 37.16 0.25 -2.31 16 16 C -0.12 -2.30 8.03 37.16 0.30 -2.01 16 17 C 0.03 0.82 4.04 -27.88 -0.11 0.71 16 18 C -0.50 -13.91 7.59 -34.44 -0.26 -14.17 16 19 H 0.06 1.61 5.73 -52.49 -0.30 1.30 16 20 C 0.05 1.54 5.46 -17.82 -0.10 1.45 16 21 N -0.90 -27.11 13.29 55.43 0.74 -26.37 16 22 Si 0.89 21.87 29.54 -169.99 -5.02 16.84 16 23 H -0.28 -6.90 7.11 56.52 0.40 -6.49 16 24 H -0.29 -7.09 7.11 56.52 0.40 -6.69 16 25 H -0.27 -6.62 7.11 56.52 0.40 -6.22 16 26 C -0.13 -1.85 9.54 -39.43 -0.38 -2.22 16 27 H 0.07 0.53 8.14 -51.93 -0.42 0.11 16 28 H 0.07 0.39 8.14 -51.93 -0.42 -0.03 16 29 H 0.07 0.53 8.14 -51.93 -0.42 0.10 16 30 H 0.07 0.57 6.03 -51.93 -0.31 0.26 16 31 H 0.07 0.38 8.14 -51.93 -0.42 -0.04 16 32 H 0.07 0.54 8.14 -51.93 -0.42 0.12 16 33 H 0.06 0.51 7.27 -51.93 -0.38 0.13 16 34 H 0.12 1.09 5.67 -52.49 -0.30 0.79 16 35 H 0.12 0.94 8.06 -52.49 -0.42 0.52 16 36 H 0.12 1.18 8.03 -52.49 -0.42 0.76 16 37 H 0.04 0.51 7.84 -51.93 -0.41 0.11 16 38 H 0.10 1.54 4.23 -51.93 -0.22 1.32 16 39 H 0.02 0.23 7.98 -51.93 -0.41 -0.19 16 40 H 0.07 0.84 7.81 -51.93 -0.41 0.43 16 41 H 0.06 0.78 6.77 -51.93 -0.35 0.42 16 42 H 0.07 1.15 7.55 -51.93 -0.39 0.76 16 43 H 0.03 0.60 7.82 -51.93 -0.41 0.20 16 44 H 0.05 0.79 4.49 -51.93 -0.23 0.55 16 45 H 0.06 1.35 6.38 -51.93 -0.33 1.02 16 46 H 0.04 0.68 7.30 -51.93 -0.38 0.30 16 47 H 0.04 0.74 8.14 -51.93 -0.42 0.32 16 48 H 0.05 1.09 6.79 -51.93 -0.35 0.74 16 49 H 0.05 0.86 7.45 -51.93 -0.39 0.48 16 50 H 0.01 0.37 8.14 -51.93 -0.42 -0.06 16 51 H 0.01 0.32 8.14 -51.93 -0.42 -0.10 16 52 H 0.26 7.39 8.31 -40.82 -0.34 7.05 16 53 H 0.13 1.99 6.23 -52.49 -0.33 1.67 16 LS Contribution 400.02 15.07 6.03 6.03 Total: -1.00 -30.44 400.02 -9.68 -40.12 By element: Atomic # 1 Polarization: 8.90 SS G_CDS: -9.26 Total: -0.36 kcal Atomic # 6 Polarization: -22.28 SS G_CDS: -1.10 Total: -23.38 kcal Atomic # 7 Polarization: -35.04 SS G_CDS: -0.13 Total: -35.18 kcal Atomic # 8 Polarization: -3.89 SS G_CDS: -0.19 Total: -4.08 kcal Atomic # 14 Polarization: 21.87 SS G_CDS: -5.02 Total: 16.84 kcal Total LS contribution 6.03 Total: 6.03 kcal Total: -30.44 -9.68 -40.12 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. ZINC000093864524.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 18.124 kcal (2) G-P(sol) polarization free energy of solvation -30.445 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -12.320 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.679 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.123 kcal (6) G-S(sol) free energy of system = (1) + (5) -21.999 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.79 seconds