Wall clock time and date at job start Tue Mar 31 2020 10:32:06 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 1.53008 * 1 3 3 C 1.52995 * 109.47065 * 2 1 4 4 C 1.53002 * 109.46831 * 120.00238 * 2 1 3 5 5 C 1.52998 * 109.46953 * 240.00084 * 2 1 3 6 6 C 1.52995 * 109.47487 * 59.99988 * 5 2 1 7 7 C 1.53001 * 109.47256 * 179.97438 * 6 5 2 8 8 C 1.53002 * 109.46995 * 180.02562 * 7 6 5 9 9 C 1.50698 * 109.47014 * 180.02562 * 8 7 6 10 10 O 1.21289 * 119.99998 * 0.02562 * 9 8 7 11 11 N 1.34778 * 119.99892 * 179.97438 * 9 8 7 12 12 C 1.46504 * 119.99577 * 180.02562 * 11 9 8 13 13 H 1.08995 * 109.50246 * 34.99901 * 12 11 9 14 14 C 1.53039 * 109.49432 * 155.06800 * 12 11 9 15 15 C 1.53044 * 109.53832 * 181.31935 * 14 12 11 16 16 C 1.53197 * 109.30548 * 298.63090 * 15 14 12 17 17 N 1.46924 * 108.77775 * 54.63646 * 16 15 14 18 18 C 1.36939 * 120.62885 * 126.38691 * 17 16 15 19 19 H 1.08003 * 119.99896 * 207.67901 * 18 17 16 20 20 C 1.38814 * 119.99824 * 27.68580 * 18 17 16 21 21 N 1.31615 * 120.00072 * 17.35574 * 20 18 17 22 22 Si 1.86808 * 119.99527 * 197.35690 * 20 18 17 23 23 H 1.48492 * 109.47248 * 59.99904 * 22 20 18 24 24 H 1.48503 * 109.46675 * 179.97438 * 22 20 18 25 25 H 1.48503 * 109.47100 * 299.99729 * 22 20 18 26 26 C 1.46927 * 118.76457 * 306.40865 * 17 16 15 27 27 H 1.09005 * 109.46815 * 59.99781 * 1 2 3 28 28 H 1.08997 * 109.47208 * 179.97438 * 1 2 3 29 29 H 1.08999 * 109.47012 * 300.00309 * 1 2 3 30 30 H 1.09003 * 109.47035 * 60.00210 * 3 2 1 31 31 H 1.09007 * 109.46869 * 179.97438 * 3 2 1 32 32 H 1.08997 * 109.47296 * 299.99998 * 3 2 1 33 33 H 1.08997 * 109.47251 * 59.99994 * 4 2 1 34 34 H 1.08999 * 109.46775 * 180.02562 * 4 2 1 35 35 H 1.09003 * 109.46553 * 299.99918 * 4 2 1 36 36 H 1.09006 * 109.47110 * 180.02562 * 5 2 1 37 37 H 1.09003 * 109.46924 * 299.99843 * 5 2 1 38 38 H 1.08996 * 109.47408 * 300.00340 * 6 5 2 39 39 H 1.09004 * 109.46881 * 60.00465 * 6 5 2 40 40 H 1.08999 * 109.47119 * 299.99903 * 7 6 5 41 41 H 1.08997 * 109.47156 * 60.00307 * 7 6 5 42 42 H 1.08999 * 109.46775 * 299.99706 * 8 7 6 43 43 H 1.08997 * 109.47251 * 59.99957 * 8 7 6 44 44 H 0.96989 * 119.99991 * 0.02562 * 11 9 8 45 45 H 1.09006 * 109.46079 * 301.32947 * 14 12 11 46 46 H 1.08998 * 109.46632 * 61.29342 * 14 12 11 47 47 H 1.08999 * 109.50038 * 58.57722 * 15 14 12 48 48 H 1.09002 * 109.49740 * 178.68544 * 15 14 12 49 49 H 1.09000 * 109.58396 * 174.42326 * 16 15 14 50 50 H 1.09000 * 109.58634 * 294.70316 * 16 15 14 51 51 H 0.97003 * 119.99828 * 180.02562 * 21 20 18 52 52 H 1.08998 * 109.56518 * 293.78524 * 26 17 16 53 53 H 1.08999 * 109.61484 * 173.35731 * 26 17 16 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 1.5301 0.0000 0.0000 3 6 2.0400 1.4425 0.0000 4 6 2.0400 -0.7213 1.2493 5 6 2.0400 -0.7212 -1.2492 6 6 1.5301 0.0000 -2.4985 7 6 2.0406 -0.7210 -3.7477 8 6 1.5311 0.0007 -4.9970 9 6 2.0334 -0.7097 -6.2274 10 8 2.7299 -1.6964 -6.1161 11 7 1.7078 -0.2493 -7.4515 12 6 2.1957 -0.9403 -8.6477 13 1 2.2322 -2.0131 -8.4587 14 6 1.2527 -0.6598 -9.8199 15 6 1.7432 -1.4078 -11.0617 16 6 3.1417 -0.9063 -11.4355 17 7 4.0200 -1.0385 -10.2652 18 6 5.2083 -1.7129 -10.3574 19 1 5.6256 -2.1933 -9.4847 20 6 5.8764 -1.7790 -11.5723 21 7 5.5734 -0.9361 -12.5367 22 14 7.2056 -3.0643 -11.8386 23 1 6.6227 -4.4203 -11.6754 24 1 7.7603 -2.9261 -13.2091 25 1 8.2899 -2.8686 -10.8430 26 6 3.5996 -0.4341 -8.9937 27 1 -0.3633 0.5139 -0.8900 28 1 -0.3633 -1.0276 -0.0005 29 1 -0.3633 0.5139 0.8900 30 1 1.6767 1.9563 0.8900 31 1 3.1301 1.4424 0.0005 32 1 1.6767 1.9563 -0.8899 33 1 1.6767 -1.7489 1.2492 34 1 3.1300 -0.7209 1.2495 35 1 1.6766 -0.2074 2.1392 36 1 3.1301 -0.7216 -1.2490 37 1 1.6767 -1.7489 -1.2492 38 1 0.4401 0.0001 -2.4985 39 1 1.8935 1.0276 -2.4985 40 1 3.1306 -0.7206 -3.7475 41 1 1.6776 -1.7487 -3.7480 42 1 0.4411 0.0006 -4.9974 43 1 1.8944 1.0283 -4.9965 44 1 1.1505 0.5395 -7.5405 45 1 0.2477 -0.9973 -9.5663 46 1 1.2353 0.4107 -10.0240 47 1 1.7844 -2.4763 -10.8503 48 1 1.0582 -1.2263 -11.8900 49 1 3.5362 -1.5032 -12.2578 50 1 3.0862 0.1397 -11.7371 51 1 6.0400 -0.9825 -13.3858 52 1 3.5824 0.6512 -9.0935 53 1 4.2956 -0.7196 -8.2050 RHF calculation, no. of doubly occupied orbitals= 61 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 ZINC001494320249.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 10:32:06 Heat of formation + Delta-G solvation = -61.742947 kcal Electronic energy + Delta-G solvation = -26058.819320 eV Core-core repulsion = 22543.232592 eV Total energy + Delta-G solvation = -3515.586728 eV No. of doubly occupied orbitals = 61 Molecular weight (most abundant/longest-lived isotopes) = 310.236 amu Computer time = 0.94 seconds Orbital eigenvalues (eV) -39.66263 -38.47850 -37.33928 -34.45518 -34.13552 -32.38111 -30.44897 -30.01990 -28.32362 -27.59128 -27.58165 -25.25622 -24.78426 -22.22225 -21.99794 -21.13598 -20.00883 -19.26485 -18.80502 -16.74500 -16.68516 -16.04391 -15.59952 -15.06479 -14.97573 -14.70919 -14.42684 -14.33316 -13.97153 -13.58852 -13.51406 -13.16547 -12.84200 -12.82256 -12.55544 -12.37856 -12.30625 -12.12484 -11.97941 -11.89819 -11.70864 -11.50399 -11.45886 -11.05746 -10.92861 -10.84972 -10.75640 -10.67272 -10.57002 -10.50748 -10.24797 -10.21943 -9.88869 -9.87441 -9.60036 -9.37414 -8.75801 -8.36135 -6.64461 -5.75543 -3.17347 2.93828 3.42859 3.45286 3.47560 3.51876 4.39505 4.52066 4.52573 4.54966 4.84599 4.86633 4.90682 5.18380 5.19845 5.27984 5.31999 5.35704 5.37568 5.41925 5.47363 5.48408 5.55869 5.59232 5.61190 5.62904 5.65302 5.69736 5.72325 5.76639 5.78803 5.91810 6.02277 6.02913 6.11770 6.13606 6.20044 6.24085 6.27192 6.32048 6.55876 6.63619 6.72604 6.73676 6.87539 7.04496 7.38143 7.66934 7.83393 7.85704 8.47529 8.56738 9.25226 9.87688 10.43367 11.33176 Molecular weight = 310.24amu Principal moments of inertia in cm(-1) A = 0.020914 B = 0.002260 C = 0.002107 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1338.465913 B =12388.776221 C =13285.146439 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 -0.072 4.072 3 C -0.144 4.144 4 C -0.142 4.142 5 C -0.109 4.109 6 C -0.122 4.122 7 C -0.105 4.105 8 C -0.140 4.140 9 C 0.506 3.494 10 O -0.538 6.538 11 N -0.726 5.726 12 C 0.125 3.875 13 H 0.084 0.916 14 C -0.114 4.114 15 C -0.140 4.140 16 C 0.167 3.833 17 N -0.588 5.588 18 C -0.250 4.250 19 H 0.066 0.934 20 C 0.001 3.999 21 N -0.905 5.905 22 Si 0.903 3.097 23 H -0.283 1.283 24 H -0.291 1.291 25 H -0.282 1.282 26 C 0.143 3.857 27 H 0.058 0.942 28 H 0.053 0.947 29 H 0.051 0.949 30 H 0.050 0.950 31 H 0.054 0.946 32 H 0.059 0.941 33 H 0.054 0.946 34 H 0.054 0.946 35 H 0.052 0.948 36 H 0.063 0.937 37 H 0.062 0.938 38 H 0.063 0.937 39 H 0.064 0.936 40 H 0.069 0.931 41 H 0.068 0.932 42 H 0.088 0.912 43 H 0.090 0.910 44 H 0.394 0.606 45 H 0.049 0.951 46 H 0.058 0.942 47 H 0.057 0.943 48 H 0.054 0.946 49 H 0.089 0.911 50 H 0.019 0.981 51 H 0.254 0.746 52 H 0.016 0.984 53 H 0.057 0.943 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -13.559 5.299 21.093 25.629 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 -0.072 4.072 3 C -0.201 4.201 4 C -0.199 4.199 5 C -0.147 4.147 6 C -0.160 4.160 7 C -0.142 4.142 8 C -0.180 4.180 9 C 0.292 3.708 10 O -0.415 6.415 11 N -0.376 5.376 12 C 0.020 3.980 13 H 0.102 0.898 14 C -0.152 4.152 15 C -0.180 4.180 16 C 0.042 3.958 17 N -0.311 5.311 18 C -0.379 4.379 19 H 0.084 0.916 20 C -0.197 4.197 21 N -0.549 5.549 22 Si 0.733 3.267 23 H -0.210 1.210 24 H -0.216 1.216 25 H -0.209 1.209 26 C 0.015 3.985 27 H 0.077 0.923 28 H 0.072 0.928 29 H 0.070 0.930 30 H 0.070 0.930 31 H 0.073 0.927 32 H 0.078 0.922 33 H 0.073 0.927 34 H 0.073 0.927 35 H 0.071 0.929 36 H 0.081 0.919 37 H 0.081 0.919 38 H 0.082 0.918 39 H 0.083 0.917 40 H 0.088 0.912 41 H 0.086 0.914 42 H 0.106 0.894 43 H 0.108 0.892 44 H 0.227 0.773 45 H 0.068 0.932 46 H 0.077 0.923 47 H 0.075 0.925 48 H 0.072 0.928 49 H 0.107 0.893 50 H 0.037 0.963 51 H 0.064 0.936 52 H 0.034 0.966 53 H 0.075 0.925 Dipole moment (debyes) X Y Z Total from point charges -12.942 4.586 20.994 25.086 hybrid contribution 0.372 -0.140 -0.307 0.502 sum -12.571 4.445 20.687 24.611 Atomic orbital electron populations 1.21933 0.94758 1.01715 1.01643 1.20568 0.95620 0.95678 0.95303 1.21935 1.01021 0.95491 1.01650 1.21877 1.01007 1.00136 0.96911 1.21639 1.00766 0.99121 0.93149 1.21741 1.00764 0.99641 0.93832 1.21344 1.01724 0.99473 0.91707 1.21686 1.02157 1.00798 0.93330 1.20690 0.80481 0.84863 0.84769 1.90728 1.37558 1.26424 1.86766 1.46193 1.53483 1.31830 1.06131 1.21713 0.95954 0.97836 0.82539 0.89765 1.21672 0.97293 1.00606 0.95673 1.22184 1.00235 0.99988 0.95565 1.20833 0.85710 0.98300 0.90996 1.43994 1.19557 1.62488 1.05040 1.19185 0.97522 1.25132 0.96105 0.91632 1.25020 0.98144 0.98517 0.98005 1.70031 1.44044 1.35460 1.05389 0.86347 0.81603 0.81860 0.76875 1.20981 1.21648 1.20851 1.21180 0.92465 0.94788 0.90044 0.92259 0.92767 0.93037 0.93043 0.92695 0.92228 0.92733 0.92689 0.92889 0.91853 0.91940 0.91812 0.91723 0.91190 0.91359 0.89404 0.89206 0.77333 0.93191 0.92308 0.92455 0.92761 0.89280 0.96339 0.93634 0.96597 0.92472 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 -0.14 -0.92 8.12 37.16 0.30 -0.62 16 2 C -0.07 -0.49 0.80 -154.51 -0.12 -0.62 16 3 C -0.14 -0.95 8.12 37.15 0.30 -0.65 16 4 C -0.14 -0.94 8.47 37.16 0.31 -0.62 16 5 C -0.11 -0.86 4.27 -26.73 -0.11 -0.98 16 6 C -0.12 -0.97 4.51 -26.73 -0.12 -1.09 16 7 C -0.10 -1.09 4.50 -26.73 -0.12 -1.21 16 8 C -0.14 -1.41 5.70 -27.88 -0.16 -1.57 16 9 C 0.51 7.62 7.80 -10.99 -0.09 7.53 16 10 O -0.54 -10.70 15.65 5.55 0.09 -10.62 16 11 N -0.73 -10.41 5.08 -53.69 -0.27 -10.68 16 12 C 0.13 2.29 2.60 -67.81 -0.18 2.11 16 13 H 0.08 1.79 7.58 -51.93 -0.39 1.39 16 14 C -0.11 -1.87 5.35 -26.69 -0.14 -2.01 16 15 C -0.14 -2.65 6.08 -26.61 -0.16 -2.82 16 16 C 0.17 4.01 5.31 -3.71 -0.02 3.99 16 17 N -0.59 -15.25 3.00 -172.31 -0.52 -15.77 16 18 C -0.25 -7.15 9.58 -15.06 -0.14 -7.30 16 19 H 0.07 1.89 7.89 -52.48 -0.41 1.48 16 20 C 0.00 0.04 4.91 -17.43 -0.09 -0.05 16 21 N -0.90 -26.60 11.19 55.49 0.62 -25.98 16 22 Si 0.90 22.36 29.59 -169.99 -5.03 17.33 16 23 H -0.28 -6.97 7.11 56.52 0.40 -6.56 16 24 H -0.29 -7.16 7.11 56.52 0.40 -6.76 16 25 H -0.28 -6.94 7.11 56.52 0.40 -6.54 16 26 C 0.14 3.19 6.09 -3.71 -0.02 3.17 16 27 H 0.06 0.37 6.43 -51.93 -0.33 0.04 16 28 H 0.05 0.35 8.14 -51.93 -0.42 -0.07 16 29 H 0.05 0.31 8.14 -51.93 -0.42 -0.12 16 30 H 0.05 0.32 8.14 -51.93 -0.42 -0.11 16 31 H 0.05 0.38 8.14 -51.92 -0.42 -0.05 16 32 H 0.06 0.39 6.43 -51.93 -0.33 0.05 16 33 H 0.05 0.36 8.14 -51.93 -0.42 -0.07 16 34 H 0.05 0.37 8.14 -51.93 -0.42 -0.06 16 35 H 0.05 0.32 8.14 -51.93 -0.42 -0.10 16 36 H 0.06 0.54 8.14 -51.93 -0.42 0.11 16 37 H 0.06 0.52 8.14 -51.93 -0.42 0.09 16 38 H 0.06 0.46 6.43 -51.93 -0.33 0.12 16 39 H 0.06 0.48 6.43 -51.93 -0.33 0.15 16 40 H 0.07 0.85 8.10 -51.93 -0.42 0.43 16 41 H 0.07 0.80 8.10 -51.93 -0.42 0.38 16 42 H 0.09 0.70 8.14 -51.93 -0.42 0.27 16 43 H 0.09 0.76 8.14 -51.93 -0.42 0.34 16 44 H 0.39 4.27 8.60 -40.82 -0.35 3.92 16 45 H 0.05 0.71 8.14 -51.93 -0.42 0.29 16 46 H 0.06 0.91 8.14 -51.93 -0.42 0.49 16 47 H 0.06 1.13 8.14 -51.93 -0.42 0.71 16 48 H 0.05 0.90 8.14 -51.93 -0.42 0.48 16 49 H 0.09 2.39 6.04 -51.93 -0.31 2.08 16 50 H 0.02 0.46 8.14 -51.93 -0.42 0.04 16 51 H 0.25 7.21 8.31 -40.82 -0.34 6.87 16 52 H 0.02 0.36 8.14 -51.93 -0.42 -0.07 16 53 H 0.06 1.37 7.93 -51.93 -0.41 0.96 16 LS Contribution 404.72 15.07 6.10 6.10 Total: -1.00 -32.20 404.72 -9.95 -42.15 By element: Atomic # 1 Polarization: 10.57 SS G_CDS: -10.38 Total: 0.19 kcal Atomic # 6 Polarization: -2.17 SS G_CDS: -0.56 Total: -2.73 kcal Atomic # 7 Polarization: -52.26 SS G_CDS: -0.17 Total: -52.43 kcal Atomic # 8 Polarization: -10.70 SS G_CDS: 0.09 Total: -10.62 kcal Atomic # 14 Polarization: 22.36 SS G_CDS: -5.03 Total: 17.33 kcal Total LS contribution 6.10 Total: 6.10 kcal Total: -32.20 -9.95 -42.15 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. ZINC001494320249.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 -19.588 kcal (2) G-P(sol) polarization free energy of solvation -32.202 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -51.790 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.953 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.155 kcal (6) G-S(sol) free energy of system = (1) + (5) -61.743 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.94 seconds