Wall clock time and date at job start Sat Apr 11 2020 06:12:28 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 1.53009 * 109.46933 * 2 1 4 4 H 1.09003 * 109.46469 * 54.82857 * 3 2 1 5 5 C 1.50694 * 109.47144 * 174.82503 * 3 2 1 6 6 O 1.21287 * 119.99912 * 106.60678 * 5 3 2 7 7 N 1.34779 * 120.00412 * 286.60844 * 5 3 2 8 8 C 1.46495 * 120.00481 * 180.02562 * 7 5 3 9 9 C 1.52993 * 109.47555 * 173.90422 * 8 7 5 10 10 H 1.09006 * 110.42179 * 57.01344 * 9 8 7 11 11 C 1.54908 * 110.37925 * 179.32879 * 9 8 7 12 12 C 1.55139 * 101.65384 * 155.89730 * 11 9 8 13 13 C 1.54310 * 103.02067 * 324.34873 * 12 11 9 14 14 N 1.47445 * 107.23363 * 22.28679 * 13 12 11 15 15 C 1.46897 * 111.00372 * 123.25678 * 14 13 12 16 16 C 1.50705 * 109.47004 * 76.87041 * 15 14 13 17 17 O 1.21290 * 120.00345 * 0.02562 * 16 15 14 18 18 N 1.34781 * 119.99712 * 179.97438 * 16 15 14 19 19 C 1.37094 * 119.99906 * 180.02562 * 18 16 15 20 20 H 1.08000 * 119.99783 * 0.02562 * 19 18 16 21 21 C 1.38950 * 120.00284 * 179.72729 * 19 18 16 22 22 N 1.31416 * 119.99623 * 0.27328 * 21 19 18 23 23 Si 1.86803 * 120.00365 * 180.27456 * 21 19 18 24 24 H 1.48504 * 109.46761 * 59.99898 * 23 21 19 25 25 H 1.48497 * 109.47104 * 179.97438 * 23 21 19 26 26 H 1.48494 * 109.47088 * 300.00084 * 23 21 19 27 27 N 1.46891 * 109.47172 * 294.82965 * 3 2 1 28 28 C 1.46904 * 110.99786 * 180.83480 * 27 3 2 29 29 C 1.46900 * 111.00341 * 304.78724 * 27 3 2 30 30 H 1.08992 * 109.47479 * 305.09517 * 1 2 3 31 31 H 1.09011 * 109.46909 * 65.09708 * 1 2 3 32 32 H 1.09003 * 109.46856 * 185.08999 * 1 2 3 33 33 H 1.09003 * 109.47524 * 240.00993 * 2 1 3 34 34 H 1.08991 * 109.47642 * 120.00101 * 2 1 3 35 35 H 0.97005 * 119.99643 * 359.97438 * 7 5 3 36 36 H 1.08994 * 109.47369 * 53.89973 * 8 7 5 37 37 H 1.09004 * 109.46661 * 293.90383 * 8 7 5 38 38 H 1.09008 * 110.98412 * 37.80411 * 11 9 8 39 39 H 1.09004 * 110.98932 * 273.99250 * 11 9 8 40 40 H 1.09004 * 110.70163 * 205.96294 * 12 11 9 41 41 H 1.08999 * 110.85202 * 82.80794 * 12 11 9 42 42 H 1.08996 * 109.89520 * 262.87777 * 13 12 11 43 43 H 1.09007 * 110.02333 * 141.76438 * 13 12 11 44 44 H 1.09005 * 109.47011 * 316.87689 * 15 14 13 45 45 H 1.09000 * 109.47616 * 196.87271 * 15 14 13 46 46 H 0.97000 * 120.00226 * 0.02562 * 18 16 15 47 47 H 0.97001 * 119.99630 * 180.02562 * 22 21 19 48 48 H 1.08994 * 109.47410 * 67.43390 * 28 27 3 49 49 H 1.09001 * 109.47038 * 187.43531 * 28 27 3 50 50 H 1.08997 * 109.47294 * 307.43088 * 28 27 3 51 51 H 1.08998 * 109.47202 * 66.39688 * 29 27 3 52 52 H 1.08997 * 109.47796 * 186.40140 * 29 27 3 53 53 H 1.09002 * 109.46665 * 306.39922 * 29 27 3 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 2.0400 1.4426 0.0000 4 1 1.6029 1.9824 0.8401 5 6 3.5414 1.4446 0.1281 6 8 4.2316 1.7152 -0.8318 7 7 4.1174 1.1456 1.3094 8 6 5.5771 1.1481 1.4342 9 6 5.9643 0.9282 2.8978 10 1 5.5352 -0.0025 3.2691 11 6 7.5057 0.9103 3.0512 12 6 7.6772 1.3135 4.5394 13 6 6.5353 2.3280 4.7586 14 7 5.5157 2.0680 3.7258 15 6 4.2074 1.7936 4.3348 16 6 3.5864 3.0873 4.7952 17 8 4.1755 4.1348 4.6316 18 7 2.3759 3.0803 5.3878 19 6 1.8107 4.2572 5.8061 20 1 2.3354 5.1899 5.6605 21 6 0.5603 4.2507 6.4119 22 7 -0.0783 3.1158 6.5887 23 14 -0.2132 5.8551 6.9751 24 1 -0.3843 6.7583 5.8087 25 1 -1.5386 5.5785 7.5849 26 1 0.6682 6.5041 7.9786 27 7 1.6549 2.0981 -1.2569 28 6 2.1459 3.4819 -1.3008 29 6 2.1314 1.3334 -2.4171 30 1 -0.3634 0.5908 0.8408 31 1 -0.3633 0.4328 -0.9322 32 1 -0.3633 -1.0237 0.0912 33 1 1.8934 -0.5137 -0.8901 34 1 1.8934 -0.5138 0.8899 35 1 3.5654 0.9296 2.0772 36 1 5.9691 2.1068 1.0947 37 1 5.9952 0.3478 0.8235 38 1 7.9721 1.6425 2.3920 39 1 7.9046 -0.0875 2.8685 40 1 8.6471 1.7838 4.7019 41 1 7.5555 0.4491 5.1921 42 1 6.9168 3.3438 4.6556 43 1 6.1018 2.1937 5.7497 44 1 4.3364 1.1285 5.1886 45 1 3.5567 1.3196 3.5999 46 1 1.9046 2.2426 5.5182 47 1 -0.9514 3.1113 7.0113 48 1 3.2343 3.4797 -1.3574 49 1 1.7375 3.9847 -2.1775 50 1 1.8300 4.0083 -0.4002 51 1 1.6113 0.3764 -2.4600 52 1 1.9333 1.8959 -3.3294 53 1 3.2035 1.1603 -2.3226 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 ZINC001317509128.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 06:12:28 Heat of formation + Delta-G solvation = -51.904161 kcal Electronic energy + Delta-G solvation = -31852.069974 eV Core-core repulsion = 27759.149733 eV Total energy + Delta-G solvation = -4092.920241 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.77 seconds Orbital eigenvalues (eV) -40.51844 -39.42491 -37.69502 -36.75698 -34.71962 -33.94267 -32.94906 -32.04781 -31.15262 -30.22308 -27.78342 -27.31391 -26.81739 -24.99233 -24.07923 -23.13488 -21.70577 -21.17374 -20.45181 -19.64261 -19.14957 -17.89750 -17.30340 -16.63692 -16.28639 -15.84590 -15.40892 -15.31861 -15.17233 -14.70641 -14.53816 -14.45674 -14.07270 -13.86946 -13.75015 -13.62393 -13.17447 -13.00787 -12.58849 -12.43139 -12.24386 -12.22015 -11.97283 -11.74087 -11.71850 -11.66449 -11.47916 -11.42778 -11.31845 -11.20822 -11.07735 -11.00419 -10.95468 -10.78377 -10.60556 -10.45217 -10.22702 -10.16786 -9.50410 -8.96791 -8.52096 -8.06458 -7.98777 -7.94817 -6.43133 -3.83771 2.63870 3.18172 3.21752 3.25265 3.29466 3.84055 3.88284 3.94796 4.20285 4.52362 4.60694 4.67790 4.81858 4.88899 4.99008 5.07376 5.13357 5.16509 5.22250 5.24105 5.36767 5.45979 5.48989 5.49766 5.58745 5.61149 5.68886 5.71424 5.72854 5.75380 5.79547 5.88286 5.89466 5.93350 5.97963 6.04852 6.10377 6.13790 6.15478 6.24654 6.33566 6.38205 6.54153 6.91160 7.02400 7.15353 7.18180 7.51379 7.53804 8.04294 8.25082 8.60293 9.17226 9.52223 10.04628 10.74466 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.007241 B = 0.004350 C = 0.003037 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 3865.882103 B = 6434.779373 C = 9218.092476 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.143 4.143 2 C -0.112 4.112 3 C 0.061 3.939 4 H 0.110 0.890 5 C 0.491 3.509 6 O -0.544 6.544 7 N -0.719 5.719 8 C 0.136 3.864 9 C 0.055 3.945 10 H 0.059 0.941 11 C -0.117 4.117 12 C -0.143 4.143 13 C 0.055 3.945 14 N -0.498 5.498 15 C 0.042 3.958 16 C 0.443 3.557 17 O -0.571 6.571 18 N -0.566 5.566 19 C -0.298 4.298 20 H 0.101 0.899 21 C 0.024 3.976 22 N -0.902 5.902 23 Si 0.928 3.072 24 H -0.273 1.273 25 H -0.284 1.284 26 H -0.274 1.274 27 N -0.512 5.512 28 C 0.010 3.990 29 C -0.001 4.001 30 H 0.059 0.941 31 H 0.065 0.935 32 H 0.051 0.949 33 H 0.069 0.931 34 H 0.068 0.932 35 H 0.398 0.602 36 H 0.078 0.922 37 H 0.065 0.935 38 H 0.080 0.920 39 H 0.074 0.926 40 H 0.075 0.925 41 H 0.065 0.935 42 H 0.082 0.918 43 H 0.055 0.945 44 H 0.053 0.947 45 H 0.075 0.925 46 H 0.390 0.610 47 H 0.272 0.728 48 H 0.050 0.950 49 H 0.066 0.934 50 H 0.066 0.934 51 H 0.062 0.938 52 H 0.060 0.940 53 H 0.067 0.933 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 7.135 -11.072 -10.154 16.631 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 -0.200 4.200 2 C -0.150 4.150 3 C -0.051 4.051 4 H 0.128 0.872 5 C 0.276 3.724 6 O -0.423 6.423 7 N -0.373 5.373 8 C 0.012 3.988 9 C -0.054 4.054 10 H 0.077 0.923 11 C -0.156 4.156 12 C -0.181 4.181 13 C -0.073 4.073 14 N -0.222 5.222 15 C -0.090 4.090 16 C 0.228 3.772 17 O -0.454 6.454 18 N -0.203 5.203 19 C -0.428 4.428 20 H 0.119 0.881 21 C -0.178 4.178 22 N -0.544 5.544 23 Si 0.756 3.244 24 H -0.199 1.199 25 H -0.210 1.210 26 H -0.200 1.200 27 N -0.234 5.234 28 C -0.138 4.138 29 C -0.148 4.148 30 H 0.078 0.922 31 H 0.084 0.916 32 H 0.070 0.930 33 H 0.088 0.912 34 H 0.086 0.914 35 H 0.235 0.765 36 H 0.096 0.904 37 H 0.083 0.917 38 H 0.098 0.902 39 H 0.093 0.907 40 H 0.093 0.907 41 H 0.084 0.916 42 H 0.101 0.899 43 H 0.073 0.927 44 H 0.071 0.929 45 H 0.093 0.907 46 H 0.223 0.777 47 H 0.082 0.918 48 H 0.068 0.932 49 H 0.085 0.915 50 H 0.085 0.915 51 H 0.080 0.920 52 H 0.079 0.921 53 H 0.085 0.915 Dipole moment (debyes) X Y Z Total from point charges 7.242 -9.726 -11.198 16.506 hybrid contribution -0.147 -0.511 1.475 1.568 sum 7.094 -10.238 -9.723 15.801 Atomic orbital electron populations 1.21663 0.93991 1.01220 1.03166 1.21555 0.97821 0.93140 1.02457 1.22053 0.89418 0.97954 0.95693 0.87235 1.22031 0.91857 0.75808 0.82681 1.90569 1.65279 1.48904 1.37557 1.46360 1.08009 1.70212 1.12702 1.21344 0.80266 1.02410 0.94800 1.22855 0.95838 0.93063 0.93594 0.92334 1.22622 0.93915 1.01924 0.97123 1.22833 0.99854 0.99394 0.96044 1.22753 0.91004 0.99763 0.93750 1.63121 1.01284 1.36504 1.21318 1.22177 0.91542 0.97232 0.98021 1.19687 0.83407 0.89904 0.84251 1.90534 1.62873 1.32475 1.59491 1.41848 1.15966 1.10028 1.52456 1.19619 1.00490 0.87460 1.35196 0.88075 1.25222 0.96558 0.98497 0.97482 1.69596 1.15298 1.25515 1.43946 0.85951 0.78005 0.81426 0.79063 1.19886 1.20964 1.19965 1.62469 1.57330 1.02730 1.00911 1.22556 1.00106 0.88699 1.02466 1.22739 1.01496 0.98058 0.92550 0.92170 0.91617 0.93007 0.91233 0.91375 0.76492 0.90380 0.91728 0.90176 0.90736 0.90673 0.91645 0.89931 0.92664 0.92950 0.90667 0.77658 0.91847 0.93157 0.91520 0.91542 0.91959 0.92123 0.91488 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 -0.14 -1.45 9.74 37.16 0.36 -1.09 16 2 C -0.11 -1.17 5.05 -26.73 -0.13 -1.30 16 3 C 0.06 0.79 2.23 -68.87 -0.15 0.64 16 4 H 0.11 1.51 8.14 -51.93 -0.42 1.08 16 5 C 0.49 7.02 6.37 -10.99 -0.07 6.95 16 6 O -0.54 -9.06 11.75 5.55 0.07 -9.00 16 7 N -0.72 -9.41 5.40 -60.30 -0.33 -9.73 16 8 C 0.14 1.71 5.37 -4.05 -0.02 1.69 16 9 C 0.06 0.65 2.61 -66.19 -0.17 0.48 16 10 H 0.06 0.62 7.81 -51.93 -0.41 0.21 16 11 C -0.12 -1.16 6.50 -24.59 -0.16 -1.31 16 12 C -0.14 -1.50 6.94 -24.91 -0.17 -1.67 16 13 C 0.05 0.80 6.07 -2.84 -0.02 0.79 16 14 N -0.50 -7.68 4.35 -224.82 -0.98 -8.66 16 15 C 0.04 0.70 4.97 -4.98 -0.02 0.67 16 16 C 0.44 10.03 7.63 -10.98 -0.08 9.95 16 17 O -0.57 -15.17 15.49 5.55 0.09 -15.08 16 18 N -0.57 -13.75 5.29 -10.96 -0.06 -13.81 16 19 C -0.30 -8.11 9.68 -14.93 -0.14 -8.26 16 20 H 0.10 2.92 7.16 -52.49 -0.38 2.54 16 21 C 0.02 0.63 5.50 -17.47 -0.10 0.53 16 22 N -0.90 -23.87 13.05 55.50 0.72 -23.15 16 23 Si 0.93 20.82 29.55 -169.99 -5.02 15.80 16 24 H -0.27 -6.14 7.11 56.52 0.40 -5.74 16 25 H -0.28 -6.22 7.11 56.52 0.40 -5.82 16 26 H -0.27 -6.13 7.11 56.52 0.40 -5.73 16 27 N -0.51 -6.75 4.61 -244.59 -1.13 -7.87 16 28 C 0.01 0.14 9.08 60.07 0.55 0.68 16 29 C 0.00 -0.01 8.66 60.06 0.52 0.51 16 30 H 0.06 0.66 8.14 -51.93 -0.42 0.24 16 31 H 0.06 0.70 7.90 -51.92 -0.41 0.29 16 32 H 0.05 0.46 8.14 -51.93 -0.42 0.03 16 33 H 0.07 0.71 6.19 -51.93 -0.32 0.39 16 34 H 0.07 0.64 8.14 -51.93 -0.42 0.22 16 35 H 0.40 4.88 5.56 -40.82 -0.23 4.65 16 36 H 0.08 1.17 8.12 -51.93 -0.42 0.75 16 37 H 0.06 0.73 8.14 -51.93 -0.42 0.31 16 38 H 0.08 0.81 8.06 -51.92 -0.42 0.39 16 39 H 0.07 0.58 8.14 -51.93 -0.42 0.16 16 40 H 0.07 0.71 8.14 -51.93 -0.42 0.28 16 41 H 0.06 0.63 8.14 -51.93 -0.42 0.20 16 42 H 0.08 1.36 8.14 -51.93 -0.42 0.93 16 43 H 0.05 0.86 7.36 -51.92 -0.38 0.48 16 44 H 0.05 0.79 7.74 -51.93 -0.40 0.39 16 45 H 0.08 1.09 5.06 -51.93 -0.26 0.82 16 46 H 0.39 9.02 7.90 -40.82 -0.32 8.70 16 47 H 0.27 6.86 8.31 -40.82 -0.34 6.52 16 48 H 0.05 0.79 5.99 -51.93 -0.31 0.48 16 49 H 0.07 0.82 8.14 -51.93 -0.42 0.39 16 50 H 0.07 0.96 8.11 -51.93 -0.42 0.54 16 51 H 0.06 0.66 6.50 -51.93 -0.34 0.33 16 52 H 0.06 0.68 8.07 -51.93 -0.42 0.26 16 53 H 0.07 0.94 5.23 -51.93 -0.27 0.67 16 LS Contribution 409.69 15.07 6.17 6.17 Total: -1.00 -31.76 409.69 -9.36 -41.12 By element: Atomic # 1 Polarization: 24.04 SS G_CDS: -9.07 Total: 14.97 kcal Atomic # 6 Polarization: 9.07 SS G_CDS: 0.18 Total: 9.25 kcal Atomic # 7 Polarization: -61.46 SS G_CDS: -1.76 Total: -63.23 kcal Atomic # 8 Polarization: -24.23 SS G_CDS: 0.15 Total: -24.08 kcal Atomic # 14 Polarization: 20.82 SS G_CDS: -5.02 Total: 15.80 kcal Total LS contribution 6.17 Total: 6.17 kcal Total: -31.76 -9.36 -41.12 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. ZINC001317509128.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 -10.785 kcal (2) G-P(sol) polarization free energy of solvation -31.761 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -42.546 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.358 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.119 kcal (6) G-S(sol) free energy of system = (1) + (5) -51.904 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.77 seconds