Wall clock time and date at job start Tue Mar 31 2020 19:28:23 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 1.53001 * 109.47204 * 2 1 4 4 C 1.52997 * 109.47204 * 179.97438 * 3 2 1 5 5 H 1.09004 * 109.48064 * 305.02369 * 4 3 2 6 6 C 1.53089 * 109.48094 * 184.99521 * 4 3 2 7 7 C 1.53181 * 109.16186 * 182.39461 * 6 4 3 8 8 H 1.09004 * 109.54205 * 176.94132 * 7 6 4 9 9 C 1.50702 * 109.54490 * 297.11718 * 7 6 4 10 10 O 1.21278 * 119.99497 * 113.96739 * 9 7 6 11 11 N 1.34774 * 119.99931 * 293.96441 * 9 7 6 12 12 C 1.47161 * 120.70639 * 174.75327 * 11 9 7 13 13 C 1.53889 * 108.03021 * 132.76035 * 12 11 9 14 14 H 1.09002 * 112.09569 * 182.54580 * 13 12 11 15 15 C 1.54540 * 107.82682 * 306.50042 * 13 12 11 16 16 C 1.54285 * 104.84896 * 89.07704 * 15 13 12 17 17 C 1.54542 * 104.84895 * 359.97438 * 16 15 13 18 18 H 1.08994 * 112.18679 * 146.40909 * 17 16 15 19 19 C 1.47156 * 120.71241 * 354.47137 * 11 9 7 20 20 N 1.48309 * 104.35831 * 24.70326 * 17 16 15 21 21 C 1.36940 * 128.08172 * 139.07830 * 20 17 16 22 22 H 1.07997 * 120.00368 * 193.82569 * 21 20 17 23 23 C 1.38814 * 119.99236 * 13.82707 * 21 20 17 24 24 N 1.31615 * 120.00341 * 9.60153 * 23 21 20 25 25 Si 1.86806 * 119.99548 * 189.59594 * 23 21 20 26 26 H 1.48499 * 109.46809 * 60.00549 * 25 23 21 27 27 H 1.48507 * 109.46967 * 180.02562 * 25 23 21 28 28 H 1.48493 * 109.47048 * 300.00294 * 25 23 21 29 29 C 1.53177 * 109.10902 * 57.03223 * 7 6 4 30 30 C 1.53285 * 109.06188 * 303.05805 * 29 7 6 31 31 O 1.42899 * 109.46379 * 57.55292 * 30 29 7 32 32 H 1.09004 * 109.47157 * 60.00042 * 1 2 3 33 33 H 1.08999 * 109.47538 * 179.97438 * 1 2 3 34 34 H 1.09006 * 109.47492 * 300.00223 * 1 2 3 35 35 H 1.09003 * 109.46887 * 240.00200 * 2 1 3 36 36 H 1.08996 * 109.47185 * 119.99651 * 2 1 3 37 37 H 1.08994 * 109.47427 * 59.99803 * 3 2 1 38 38 H 1.09004 * 109.47030 * 300.00037 * 3 2 1 39 39 H 1.09004 * 109.51925 * 62.49244 * 6 4 3 40 40 H 1.08993 * 109.52669 * 302.30438 * 6 4 3 41 41 H 1.09007 * 109.74681 * 252.39192 * 12 11 9 42 42 H 1.08997 * 109.75273 * 13.07383 * 12 11 9 43 43 H 1.09003 * 110.36285 * 207.91451 * 15 13 12 44 44 H 1.08996 * 110.37013 * 330.12275 * 15 13 12 45 45 H 1.09000 * 110.36350 * 118.83913 * 16 15 13 46 46 H 1.09002 * 110.36315 * 241.04319 * 16 15 13 47 47 H 1.09005 * 109.75039 * 346.87306 * 19 11 9 48 48 H 1.08998 * 109.75121 * 107.60618 * 19 11 9 49 49 H 0.97004 * 120.00265 * 179.97438 * 24 23 21 50 50 H 1.08996 * 109.52326 * 62.87699 * 29 7 6 51 51 H 1.08996 * 109.52352 * 183.06535 * 29 7 6 52 52 H 1.09002 * 109.45674 * 297.55579 * 30 29 7 53 53 H 1.09000 * 109.46550 * 177.55887 * 30 29 7 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 1.4425 0.0000 4 6 3.5700 1.4425 0.0006 5 1 3.9331 0.8528 0.8424 6 6 4.0804 2.8803 0.1263 7 6 5.6111 2.8775 0.0660 8 1 5.9792 3.9029 0.1004 9 6 6.1604 2.1052 1.2378 10 8 6.7565 1.0654 1.0527 11 7 5.9891 2.5700 2.4911 12 6 6.4168 1.7743 3.6528 13 6 7.2056 2.6974 4.5982 14 1 7.5938 2.1619 5.4646 15 6 8.3287 3.3687 3.7758 16 6 7.6907 4.6552 3.2116 17 6 6.2398 4.6441 3.7438 18 1 5.8674 5.6485 3.9447 19 6 5.3760 3.8868 2.7271 20 7 6.3048 3.8146 4.9716 21 6 5.6794 4.0302 6.1706 22 1 5.9843 3.4762 7.0460 23 6 4.6534 4.9609 6.2606 24 7 4.1536 5.4973 5.1675 25 14 3.9821 5.4521 7.9333 26 1 5.0730 6.0405 8.7511 27 1 2.8994 6.4532 7.7576 28 1 3.4399 4.2526 8.6206 29 6 6.0602 2.2153 -1.2401 30 6 5.4714 0.8019 -1.3131 31 8 4.0473 0.8740 -1.2206 32 1 -0.3634 0.5138 -0.8900 33 1 -0.3634 -1.0276 -0.0005 34 1 -0.3634 0.5139 0.8900 35 1 1.8933 -0.5138 -0.8900 36 1 1.8933 -0.5138 0.8900 37 1 1.6767 1.9564 0.8899 38 1 1.6766 1.9563 -0.8900 39 1 3.7542 3.3008 1.0776 40 1 3.6847 3.4803 -0.6931 41 1 5.5428 1.3778 4.1696 42 1 7.0533 0.9533 3.3227 43 1 9.1740 3.6149 4.4185 44 1 8.6478 2.7144 2.9646 45 1 8.2223 5.5339 3.5769 46 1 7.6966 4.6350 2.1218 47 1 5.3335 4.4462 1.7925 48 1 4.3700 3.7585 3.1264 49 1 3.4364 6.1474 5.2304 50 1 5.7044 2.8019 -2.0871 51 1 7.1485 2.1606 -1.2653 52 1 5.8595 0.2039 -0.4885 53 1 5.7513 0.3403 -2.2601 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 ZINC001029528359.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 19:28:23 Heat of formation + Delta-G solvation = -62.165393 kcal Electronic energy + Delta-G solvation = -32345.285913 eV Core-core repulsion = 28410.084012 eV Total energy + Delta-G solvation = -3935.201901 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 1.29 seconds Orbital eigenvalues (eV) -40.73977 -39.10898 -37.48154 -34.93479 -34.05601 -33.36874 -32.40057 -31.06999 -30.62024 -29.30103 -27.40536 -26.27115 -24.71977 -23.94589 -23.62297 -22.58032 -21.29830 -20.95300 -19.73003 -19.22707 -18.42758 -16.92164 -16.39810 -16.25262 -15.84270 -15.46004 -15.12968 -14.72865 -14.61787 -14.41993 -14.10768 -13.73087 -13.58662 -13.37673 -13.09966 -12.88719 -12.73578 -12.71618 -12.39112 -12.12700 -11.86690 -11.78942 -11.69559 -11.59562 -11.43607 -11.26041 -11.12714 -10.92011 -10.89427 -10.82316 -10.62087 -10.48237 -10.41428 -10.21190 -10.07197 -9.88786 -9.63894 -9.60506 -9.43380 -9.02431 -8.73986 -8.08011 -6.91251 -5.90870 -3.24759 3.04196 3.32414 3.37918 3.38364 3.56194 3.93574 4.36995 4.60395 4.73835 4.89883 4.97244 5.05755 5.09077 5.17598 5.24723 5.27446 5.35074 5.37199 5.58359 5.63048 5.67437 5.69259 5.73560 5.74982 5.80702 5.81392 5.86506 5.86969 5.91454 5.99990 6.01896 6.04789 6.07609 6.11637 6.18506 6.24106 6.27936 6.34719 6.37206 6.39345 6.50209 6.58221 6.60413 6.67832 6.84213 6.92326 7.20614 7.41580 7.42626 7.59915 8.04221 8.08664 8.65913 8.99810 9.61871 10.37952 11.22355 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.011622 B = 0.004270 C = 0.003457 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2408.563191 B = 6555.893008 C = 8096.996576 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.152 4.152 2 C -0.122 4.122 3 C -0.110 4.110 4 C 0.093 3.907 5 H 0.056 0.944 6 C -0.144 4.144 7 C -0.110 4.110 8 H 0.096 0.904 9 C 0.512 3.488 10 O -0.562 6.562 11 N -0.588 5.588 12 C 0.101 3.899 13 C 0.134 3.866 14 H 0.077 0.923 15 C -0.124 4.124 16 C -0.136 4.136 17 C 0.166 3.834 18 H 0.122 0.878 19 C 0.103 3.897 20 N -0.584 5.584 21 C -0.224 4.224 22 H 0.076 0.924 23 C -0.003 4.003 24 N -0.917 5.917 25 Si 0.912 3.088 26 H -0.285 1.285 27 H -0.290 1.290 28 H -0.285 1.285 29 C -0.130 4.130 30 C 0.049 3.951 31 O -0.382 6.382 32 H 0.052 0.948 33 H 0.051 0.949 34 H 0.053 0.947 35 H 0.068 0.932 36 H 0.058 0.942 37 H 0.076 0.924 38 H 0.069 0.931 39 H 0.087 0.913 40 H 0.078 0.922 41 H 0.061 0.939 42 H 0.074 0.926 43 H 0.053 0.947 44 H 0.055 0.945 45 H 0.054 0.946 46 H 0.048 0.952 47 H 0.061 0.939 48 H 0.082 0.918 49 H 0.255 0.745 50 H 0.070 0.930 51 H 0.075 0.925 52 H 0.082 0.918 53 H 0.084 0.916 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -0.384 -4.701 -11.475 12.406 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 -0.209 4.209 2 C -0.159 4.159 3 C -0.148 4.148 4 C 0.035 3.965 5 H 0.074 0.926 6 C -0.182 4.182 7 C -0.131 4.131 8 H 0.114 0.886 9 C 0.300 3.700 10 O -0.443 6.443 11 N -0.318 5.318 12 C -0.024 4.024 13 C 0.026 3.974 14 H 0.095 0.905 15 C -0.163 4.163 16 C -0.175 4.175 17 C 0.059 3.941 18 H 0.140 0.860 19 C -0.020 4.020 20 N -0.305 5.305 21 C -0.352 4.352 22 H 0.094 0.906 23 C -0.199 4.199 24 N -0.564 5.564 25 Si 0.742 3.258 26 H -0.212 1.212 27 H -0.216 1.216 28 H -0.211 1.211 29 C -0.168 4.168 30 C -0.027 4.027 31 O -0.301 6.301 32 H 0.071 0.929 33 H 0.070 0.930 34 H 0.072 0.928 35 H 0.086 0.914 36 H 0.077 0.923 37 H 0.095 0.905 38 H 0.088 0.912 39 H 0.105 0.895 40 H 0.097 0.903 41 H 0.079 0.921 42 H 0.093 0.907 43 H 0.072 0.928 44 H 0.073 0.927 45 H 0.072 0.928 46 H 0.067 0.933 47 H 0.079 0.921 48 H 0.100 0.900 49 H 0.065 0.935 50 H 0.089 0.911 51 H 0.094 0.906 52 H 0.100 0.900 53 H 0.102 0.898 Dipole moment (debyes) X Y Z Total from point charges -0.423 -5.143 -11.527 12.629 hybrid contribution -0.185 0.562 1.063 1.217 sum -0.608 -4.580 -10.464 11.438 Atomic orbital electron populations 1.21778 0.96092 1.01354 1.01669 1.21463 0.95376 0.96699 1.02376 1.21625 0.92728 0.97676 1.02723 1.22060 0.94384 0.92641 0.87387 0.92587 1.22282 0.93374 0.98350 1.04174 1.21343 0.96894 1.00832 0.94026 0.88580 1.20453 0.79662 0.85698 0.84158 1.90544 1.43576 1.25222 1.84987 1.48195 1.59004 1.19738 1.04895 1.22349 0.99264 0.94148 0.86599 1.21951 0.90761 0.90235 0.94455 0.90496 1.22472 0.97871 0.97227 0.98712 1.22650 0.99412 0.97067 0.98399 1.21836 0.89950 0.97542 0.84817 0.86023 1.22560 0.98964 0.81646 0.98848 1.45146 1.53148 1.21971 1.10237 1.18985 1.11239 1.19920 0.85083 0.90585 1.24771 0.97160 1.00740 0.97260 1.69786 1.28396 1.32491 1.25691 0.86206 0.78255 0.78082 0.83244 1.21187 1.21567 1.21125 1.21964 1.01518 0.97609 0.95714 1.22868 0.80537 0.96292 1.03006 1.87842 1.21393 1.82538 1.38365 0.92883 0.92989 0.92779 0.91373 0.92289 0.90495 0.91239 0.89453 0.90292 0.92102 0.90748 0.92794 0.92662 0.92763 0.93335 0.92076 0.89961 0.93463 0.91090 0.90605 0.90038 0.89793 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 -1.51 9.91 37.16 0.37 -1.15 16 2 C -0.12 -1.42 5.83 -26.73 -0.16 -1.58 16 3 C -0.11 -1.35 4.92 -26.73 -0.13 -1.49 16 4 C 0.09 1.31 2.42 -26.69 -0.06 1.25 16 5 H 0.06 0.92 7.38 -51.93 -0.38 0.54 16 6 C -0.14 -1.95 4.62 -26.59 -0.12 -2.07 16 7 C -0.11 -1.55 2.19 -91.59 -0.20 -1.75 16 8 H 0.10 1.27 7.05 -51.93 -0.37 0.91 16 9 C 0.51 8.80 5.74 -10.99 -0.06 8.73 16 10 O -0.56 -10.80 13.13 5.56 0.07 -10.72 16 11 N -0.59 -10.63 2.26 -171.83 -0.39 -11.02 16 12 C 0.10 1.91 5.92 -3.22 -0.02 1.89 16 13 C 0.13 2.64 4.32 -65.67 -0.28 2.35 16 14 H 0.08 1.45 8.14 -51.93 -0.42 1.03 16 15 C -0.12 -2.21 6.18 -25.25 -0.16 -2.37 16 16 C -0.14 -2.48 6.18 -25.25 -0.16 -2.64 16 17 C 0.17 3.49 3.13 -65.92 -0.21 3.29 16 18 H 0.12 2.91 6.29 -51.93 -0.33 2.58 16 19 C 0.10 1.95 4.18 -3.47 -0.01 1.94 16 20 N -0.58 -13.40 2.81 -152.90 -0.43 -13.83 16 21 C -0.22 -5.71 10.37 -15.06 -0.16 -5.86 16 22 H 0.08 1.90 7.85 -52.49 -0.41 1.49 16 23 C 0.00 -0.07 5.42 -17.43 -0.09 -0.16 16 24 N -0.92 -23.84 10.46 55.49 0.58 -23.26 16 25 Si 0.91 20.67 29.56 -169.99 -5.03 15.64 16 26 H -0.29 -6.48 7.11 56.52 0.40 -6.08 16 27 H -0.29 -6.66 7.11 56.52 0.40 -6.26 16 28 H -0.28 -6.46 7.11 56.52 0.40 -6.05 16 29 C -0.13 -1.68 5.31 -26.49 -0.14 -1.82 16 30 C 0.05 0.68 6.56 37.30 0.24 0.93 16 31 O -0.38 -5.58 9.95 -35.23 -0.35 -5.93 16 32 H 0.05 0.49 8.14 -51.93 -0.42 0.07 16 33 H 0.05 0.47 8.14 -51.93 -0.42 0.05 16 34 H 0.05 0.53 8.14 -51.93 -0.42 0.11 16 35 H 0.07 0.83 7.83 -51.93 -0.41 0.43 16 36 H 0.06 0.72 8.14 -51.93 -0.42 0.30 16 37 H 0.08 0.94 8.14 -51.93 -0.42 0.51 16 38 H 0.07 0.81 8.14 -51.93 -0.42 0.38 16 39 H 0.09 1.27 5.94 -51.93 -0.31 0.96 16 40 H 0.08 0.96 8.14 -51.93 -0.42 0.53 16 41 H 0.06 1.23 8.14 -51.93 -0.42 0.81 16 42 H 0.07 1.38 7.08 -51.93 -0.37 1.01 16 43 H 0.05 0.92 8.14 -51.93 -0.42 0.50 16 44 H 0.05 0.97 7.84 -51.93 -0.41 0.56 16 45 H 0.05 0.97 8.14 -51.93 -0.42 0.55 16 46 H 0.05 0.82 7.83 -51.93 -0.41 0.41 16 47 H 0.06 1.01 5.47 -51.93 -0.28 0.73 16 48 H 0.08 1.80 7.69 -51.93 -0.40 1.40 16 49 H 0.26 6.55 8.31 -40.82 -0.34 6.21 16 50 H 0.07 0.81 8.14 -51.93 -0.42 0.39 16 51 H 0.08 0.98 8.10 -51.93 -0.42 0.56 16 52 H 0.08 1.33 5.61 -51.93 -0.29 1.04 16 53 H 0.08 1.00 8.14 -51.93 -0.42 0.58 16 LS Contribution 388.79 15.07 5.86 5.86 Total: -1.00 -27.08 388.79 -10.44 -37.52 By element: Atomic # 1 Polarization: 15.65 SS G_CDS: -9.41 Total: 6.24 kcal Atomic # 6 Polarization: 0.85 SS G_CDS: -1.35 Total: -0.50 kcal Atomic # 7 Polarization: -47.87 SS G_CDS: -0.24 Total: -48.11 kcal Atomic # 8 Polarization: -16.38 SS G_CDS: -0.28 Total: -16.66 kcal Atomic # 14 Polarization: 20.67 SS G_CDS: -5.03 Total: 15.64 kcal Total LS contribution 5.86 Total: 5.86 kcal Total: -27.08 -10.44 -37.52 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. ZINC001029528359.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 -24.642 kcal (2) G-P(sol) polarization free energy of solvation -27.080 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -51.722 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.443 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -37.523 kcal (6) G-S(sol) free energy of system = (1) + (5) -62.165 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.29 seconds