Wall clock time and date at job start Sat Apr 11 2020 06:10:46 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 1.53000 * 1 3 3 O 1.42901 * 109.47033 * 2 1 4 4 C 1.42898 * 114.00216 * 179.97438 * 3 2 1 5 5 C 1.53004 * 109.47508 * 179.97438 * 4 3 2 6 6 H 1.09000 * 109.46716 * 54.99769 * 5 4 3 7 7 O 1.42899 * 109.47096 * 295.00323 * 5 4 3 8 8 C 1.52996 * 109.47618 * 174.99871 * 5 4 3 9 9 N 1.46890 * 109.47388 * 185.00250 * 8 5 4 10 10 C 1.48726 * 111.00215 * 52.84521 * 9 8 5 11 11 C 1.55002 * 103.35304 * 158.81664 * 10 9 8 12 12 C 1.54795 * 102.94202 * 323.04274 * 11 10 9 13 13 C 1.47082 * 111.00106 * 170.00287 * 9 8 5 14 14 C 1.54035 * 110.85858 * 93.71860 * 13 9 8 15 15 C 1.54648 * 101.50173 * 264.09544 * 14 13 9 16 16 N 1.46853 * 105.50543 * 335.02988 * 15 14 13 17 17 C 1.46507 * 124.36907 * 196.84657 * 16 15 14 18 18 C 1.52997 * 109.47235 * 270.02535 * 17 16 15 19 19 C 1.50692 * 109.47049 * 179.97438 * 18 17 16 20 20 H 1.07996 * 120.00367 * 0.02562 * 19 18 17 21 21 C 1.37882 * 119.99987 * 179.97438 * 19 18 17 22 22 N 1.31512 * 119.99735 * 359.97438 * 21 19 18 23 23 Si 1.86802 * 120.00158 * 180.02562 * 21 19 18 24 24 H 1.48498 * 109.46850 * 59.99916 * 23 21 19 25 25 H 1.48497 * 109.47179 * 179.97438 * 23 21 19 26 26 H 1.48500 * 109.46765 * 300.00033 * 23 21 19 27 27 C 1.34668 * 111.26435 * 16.86759 * 16 15 14 28 28 O 1.21283 * 125.07831 * 179.14127 * 27 16 15 29 29 H 1.08992 * 109.47339 * 300.00070 * 1 2 3 30 30 H 1.09003 * 109.46551 * 60.00603 * 1 2 3 31 31 H 1.09000 * 109.46786 * 179.97438 * 1 2 3 32 32 H 1.08992 * 109.47339 * 239.99930 * 2 1 3 33 33 H 1.08998 * 109.47210 * 119.99206 * 2 1 3 34 34 H 1.08999 * 109.46940 * 59.99859 * 4 3 2 35 35 H 1.09006 * 109.47216 * 299.99728 * 4 3 2 36 36 H 0.96700 * 113.99475 * 299.99836 * 7 5 4 37 37 H 1.09006 * 109.46958 * 64.99850 * 8 5 4 38 38 H 1.09000 * 109.46941 * 305.00814 * 8 5 4 39 39 H 1.08997 * 110.64374 * 40.34365 * 10 9 8 40 40 H 1.09001 * 110.78320 * 277.34656 * 10 9 8 41 41 H 1.09009 * 110.71642 * 204.68054 * 11 10 9 42 42 H 1.08999 * 110.87241 * 81.47887 * 11 10 9 43 43 H 1.09011 * 110.37042 * 263.06280 * 12 11 10 44 44 H 1.09004 * 110.37033 * 140.73509 * 12 11 10 45 45 H 1.09000 * 111.23589 * 145.96877 * 14 13 9 46 46 H 1.09001 * 110.88242 * 22.07392 * 14 13 9 47 47 H 1.09001 * 110.24141 * 216.02300 * 15 14 13 48 48 H 1.08996 * 110.23985 * 94.03549 * 15 14 13 49 49 H 1.09003 * 109.46387 * 30.02433 * 17 16 15 50 50 H 1.08993 * 109.46698 * 150.02113 * 17 16 15 51 51 H 1.09002 * 109.47121 * 300.00058 * 18 17 16 52 52 H 1.09003 * 109.47211 * 59.99730 * 18 17 16 53 53 H 0.97007 * 120.00044 * 179.97438 * 22 21 19 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 8 2.0063 1.3473 0.0000 4 6 3.4308 1.4602 0.0006 5 6 3.8254 2.9385 -0.0001 6 1 3.3491 3.4420 0.8412 7 8 3.3986 3.5448 -1.2217 8 6 5.3452 3.0609 0.1263 9 7 5.7141 4.4777 0.2460 10 6 4.9530 5.1359 1.3412 11 6 5.8179 6.3759 1.6831 12 6 7.2632 5.8456 1.5222 13 6 7.1327 4.6244 0.6057 14 6 8.0026 4.7985 -0.6536 15 6 8.4802 3.3487 -0.9013 16 7 8.4211 2.6867 0.4082 17 6 9.1020 1.4304 0.7314 18 6 8.1767 0.2532 0.4168 19 6 8.8774 -1.0390 0.7486 20 1 9.8819 -1.0224 1.1447 21 6 8.2355 -2.2426 0.5476 22 7 7.0116 -2.2628 0.0667 23 14 9.1037 -3.8445 0.9595 24 1 9.4533 -3.8610 2.4027 25 1 8.2052 -4.9870 0.6553 26 1 10.3425 -3.9587 0.1487 27 6 7.6598 3.3832 1.2736 28 8 7.4293 3.0562 2.4186 29 1 -0.3633 0.5138 0.8899 30 1 -0.3632 0.5138 -0.8901 31 1 -0.3633 -1.0277 -0.0005 32 1 1.8933 -0.5138 -0.8899 33 1 1.8933 -0.5137 0.8900 34 1 3.8340 0.9765 -0.8891 35 1 3.8333 0.9768 0.8909 36 1 3.7837 3.1463 -2.0141 37 1 5.8188 2.6356 -0.7587 38 1 5.6807 2.5219 1.0123 39 1 4.8713 4.4746 2.2038 40 1 3.9646 5.4400 0.9968 41 1 5.6381 6.7007 2.7080 42 1 5.6252 7.1888 0.9830 43 1 7.6696 5.5518 2.4901 44 1 7.8957 6.6024 1.0581 45 1 8.8469 5.4606 -0.4617 46 1 7.4062 5.1618 -1.4906 47 1 9.5029 3.3478 -1.2784 48 1 7.8169 2.8485 -1.6069 49 1 10.0115 1.3467 0.1364 50 1 9.3583 1.4182 1.7907 51 1 7.2672 0.3369 1.0116 52 1 7.9204 0.2655 -0.6426 53 1 6.5601 -3.1096 -0.0751 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 ZINC001274566840.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 06:10:46 Heat of formation + Delta-G solvation = -126.330680 kcal Electronic energy + Delta-G solvation = -32405.921778 eV Core-core repulsion = 28277.481410 eV Total energy + Delta-G solvation = -4128.440368 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.76 seconds Orbital eigenvalues (eV) -41.30155 -38.54317 -37.51976 -36.37472 -36.05121 -33.68502 -32.62825 -31.83563 -31.42653 -29.16759 -28.96432 -27.74932 -25.19638 -24.96194 -23.34602 -22.69992 -22.25284 -21.88108 -20.52648 -20.18607 -18.58796 -17.14084 -16.83644 -16.46383 -16.22009 -15.94126 -15.67568 -15.58967 -15.08028 -15.01001 -14.64925 -14.43691 -14.22842 -13.71527 -13.57438 -13.08421 -13.03396 -12.77767 -12.72795 -12.66981 -12.44496 -12.36338 -12.25229 -12.04711 -11.73251 -11.45263 -11.36077 -11.28527 -11.23070 -11.11357 -10.99338 -10.92684 -10.77589 -10.60380 -10.49207 -10.10176 -9.94046 -9.85533 -9.67737 -9.48420 -9.31340 -8.45756 -8.29932 -8.09102 -6.11465 -4.14422 2.82218 3.26903 3.31335 3.33008 3.46208 3.49460 4.03180 4.37060 4.38378 4.47060 4.54395 4.67809 4.86726 5.01007 5.06197 5.09255 5.10187 5.13817 5.17944 5.25408 5.29305 5.32171 5.46372 5.50435 5.56866 5.65113 5.67817 5.73893 5.74544 5.80320 5.81677 5.89391 5.91994 5.92754 5.94200 6.02324 6.07044 6.09068 6.11680 6.20653 6.37721 6.70699 6.81019 6.89431 6.93286 7.28185 7.40088 7.55415 7.74182 7.79028 7.87148 8.24513 8.55803 8.91233 9.50001 10.99794 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.006942 B = 0.004987 C = 0.003156 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 4032.543687 B = 5613.313347 C = 8870.558639 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.148 4.148 2 C 0.055 3.945 3 O -0.382 6.382 4 C 0.031 3.969 5 C 0.120 3.880 6 H 0.104 0.896 7 O -0.544 6.544 8 C 0.003 3.997 9 N -0.470 5.470 10 C 0.028 3.972 11 C -0.118 4.118 12 C -0.111 4.111 13 C 0.058 3.942 14 C -0.115 4.115 15 C 0.099 3.901 16 N -0.608 5.608 17 C 0.126 3.874 18 C 0.016 3.984 19 C -0.523 4.523 20 H 0.056 0.944 21 C 0.061 3.939 22 N -0.893 5.893 23 Si 0.894 3.106 24 H -0.276 1.276 25 H -0.287 1.287 26 H -0.276 1.276 27 C 0.502 3.498 28 O -0.531 6.531 29 H 0.060 0.940 30 H 0.061 0.939 31 H 0.069 0.931 32 H 0.049 0.951 33 H 0.049 0.951 34 H 0.058 0.942 35 H 0.062 0.938 36 H 0.371 0.629 37 H 0.087 0.913 38 H 0.064 0.936 39 H 0.051 0.949 40 H 0.089 0.911 41 H 0.072 0.928 42 H 0.075 0.925 43 H 0.076 0.924 44 H 0.078 0.922 45 H 0.082 0.918 46 H 0.099 0.901 47 H 0.076 0.924 48 H 0.070 0.930 49 H 0.066 0.934 50 H 0.069 0.931 51 H 0.018 0.982 52 H 0.016 0.984 53 H 0.261 0.739 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -5.238 14.631 -3.237 15.874 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 -0.205 4.205 2 C -0.022 4.022 3 O -0.302 6.302 4 C -0.047 4.047 5 C 0.060 3.940 6 H 0.122 0.878 7 O -0.348 6.348 8 C -0.125 4.125 9 N -0.194 5.194 10 C -0.099 4.099 11 C -0.156 4.156 12 C -0.150 4.150 13 C -0.036 4.036 14 C -0.154 4.154 15 C -0.025 4.025 16 N -0.341 5.341 17 C 0.006 3.994 18 C -0.022 4.022 19 C -0.562 4.562 20 H 0.074 0.926 21 C -0.140 4.140 22 N -0.532 5.532 23 Si 0.722 3.278 24 H -0.201 1.201 25 H -0.212 1.212 26 H -0.201 1.201 27 C 0.287 3.713 28 O -0.408 6.408 29 H 0.079 0.921 30 H 0.080 0.920 31 H 0.087 0.913 32 H 0.068 0.932 33 H 0.067 0.933 34 H 0.076 0.924 35 H 0.080 0.920 36 H 0.218 0.782 37 H 0.105 0.895 38 H 0.082 0.918 39 H 0.070 0.930 40 H 0.108 0.892 41 H 0.091 0.909 42 H 0.094 0.906 43 H 0.095 0.905 44 H 0.097 0.903 45 H 0.101 0.899 46 H 0.118 0.882 47 H 0.095 0.905 48 H 0.088 0.912 49 H 0.084 0.916 50 H 0.088 0.912 51 H 0.036 0.964 52 H 0.035 0.965 53 H 0.071 0.929 Dipole moment (debyes) X Y Z Total from point charges -6.021 15.005 -2.768 16.403 hybrid contribution 1.228 -2.354 0.541 2.710 sum -4.793 12.650 -2.226 13.710 Atomic orbital electron populations 1.21721 0.93950 1.02008 1.02850 1.22471 0.95238 0.83925 1.00570 1.87860 1.20539 1.26253 1.95536 1.23199 0.81858 0.97548 1.02050 1.21835 0.92076 0.91229 0.88856 0.87812 1.86575 1.72015 1.61249 1.14978 1.23121 0.96274 0.89512 1.03612 1.64928 1.00516 1.13075 1.40874 1.23392 0.98294 0.95339 0.92899 1.22480 0.93964 0.97547 1.01608 1.22301 0.98135 0.95128 0.99412 1.22184 0.90782 0.94879 0.95727 1.22674 0.98736 0.96073 0.97886 1.22145 1.01985 0.92362 0.85986 1.48680 1.49249 1.24124 1.12062 1.21837 0.95632 0.81452 1.00525 1.19363 0.94957 0.90930 0.96962 1.21039 1.00905 0.90753 1.43489 0.92560 1.24967 0.94861 0.99227 0.94984 1.69944 1.11976 1.26333 1.44913 0.86623 0.79436 0.82747 0.79022 1.20149 1.21225 1.20137 1.20968 0.78770 0.85808 0.85799 1.90704 1.59693 1.73076 1.17317 0.92055 0.91989 0.91251 0.93249 0.93261 0.92398 0.91991 0.78181 0.89482 0.91803 0.93019 0.89223 0.90948 0.90582 0.90541 0.90321 0.89903 0.88232 0.90532 0.91151 0.91554 0.91246 0.96398 0.96546 0.92917 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 -1.62 10.28 37.16 0.38 -1.23 16 2 C 0.05 0.74 6.66 37.16 0.25 0.99 16 3 O -0.38 -6.02 10.31 -40.08 -0.41 -6.43 16 4 C 0.03 0.49 5.57 37.16 0.21 0.69 16 5 C 0.12 1.74 2.98 -26.73 -0.08 1.66 16 6 H 0.10 1.54 6.53 -51.93 -0.34 1.21 16 7 O -0.54 -7.58 13.25 -40.08 -0.53 -8.11 16 8 C 0.00 0.05 3.86 -3.83 -0.01 0.03 16 9 N -0.47 -6.43 4.98 -216.68 -1.08 -7.50 16 10 C 0.03 0.36 5.09 -1.75 -0.01 0.35 16 11 C -0.12 -1.26 7.07 -24.73 -0.17 -1.44 16 12 C -0.11 -1.32 6.18 -25.66 -0.16 -1.48 16 13 C 0.06 0.79 0.80 -132.09 -0.11 0.69 16 14 C -0.12 -1.28 6.33 -25.32 -0.16 -1.44 16 15 C 0.10 1.31 6.84 -2.98 -0.02 1.29 16 16 N -0.61 -10.68 2.93 -172.50 -0.50 -11.18 16 17 C 0.13 2.59 5.88 -4.04 -0.02 2.57 16 18 C 0.02 0.40 5.30 -27.89 -0.15 0.25 16 19 C -0.52 -14.42 9.11 -34.44 -0.31 -14.73 16 20 H 0.06 1.50 7.74 -52.49 -0.41 1.09 16 21 C 0.06 1.72 5.46 -17.82 -0.10 1.62 16 22 N -0.89 -25.93 13.29 55.43 0.74 -25.19 16 23 Si 0.89 21.27 29.54 -169.99 -5.02 16.25 16 24 H -0.28 -6.52 7.11 56.52 0.40 -6.12 16 25 H -0.29 -6.75 7.11 56.52 0.40 -6.35 16 26 H -0.28 -6.40 7.11 56.52 0.40 -6.00 16 27 C 0.50 9.07 4.46 -11.14 -0.05 9.02 16 28 O -0.53 -11.74 16.57 5.55 0.09 -11.64 16 29 H 0.06 0.66 8.14 -51.93 -0.42 0.24 16 30 H 0.06 0.66 8.14 -51.93 -0.42 0.24 16 31 H 0.07 0.63 8.14 -51.93 -0.42 0.21 16 32 H 0.05 0.66 8.14 -51.93 -0.42 0.23 16 33 H 0.05 0.68 8.14 -51.93 -0.42 0.26 16 34 H 0.06 0.90 8.14 -51.93 -0.42 0.48 16 35 H 0.06 1.06 8.14 -51.93 -0.42 0.64 16 36 H 0.37 4.12 9.04 45.56 0.41 4.54 16 37 H 0.09 1.37 7.05 -51.93 -0.37 1.00 16 38 H 0.06 1.22 5.91 -51.93 -0.31 0.92 16 39 H 0.05 0.75 7.99 -51.93 -0.41 0.34 16 40 H 0.09 1.09 7.61 -51.93 -0.40 0.70 16 41 H 0.07 0.70 8.14 -51.92 -0.42 0.28 16 42 H 0.08 0.71 8.14 -51.93 -0.42 0.29 16 43 H 0.08 1.03 7.44 -51.92 -0.39 0.65 16 44 H 0.08 0.75 7.41 -51.93 -0.38 0.37 16 45 H 0.08 0.77 7.59 -51.93 -0.39 0.37 16 46 H 0.10 0.99 8.07 -51.93 -0.42 0.57 16 47 H 0.08 0.88 8.14 -51.93 -0.42 0.46 16 48 H 0.07 0.95 7.44 -51.93 -0.39 0.56 16 49 H 0.07 1.25 8.14 -51.93 -0.42 0.82 16 50 H 0.07 1.53 7.94 -51.93 -0.41 1.11 16 51 H 0.02 0.50 8.14 -51.93 -0.42 0.08 16 52 H 0.02 0.43 8.14 -51.93 -0.42 0.00 16 53 H 0.26 7.20 8.31 -40.82 -0.34 6.86 16 LS Contribution 415.98 15.07 6.27 6.27 Total: -1.00 -32.88 415.98 -9.80 -42.68 By element: Atomic # 1 Polarization: 14.86 SS G_CDS: -8.83 Total: 6.03 kcal Atomic # 6 Polarization: -0.64 SS G_CDS: -0.52 Total: -1.16 kcal Atomic # 7 Polarization: -43.03 SS G_CDS: -0.85 Total: -43.88 kcal Atomic # 8 Polarization: -25.33 SS G_CDS: -0.85 Total: -26.19 kcal Atomic # 14 Polarization: 21.27 SS G_CDS: -5.02 Total: 16.25 kcal Total LS contribution 6.27 Total: 6.27 kcal Total: -32.88 -9.80 -42.68 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. ZINC001274566840.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 -83.649 kcal (2) G-P(sol) polarization free energy of solvation -32.880 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -116.529 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.802 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.682 kcal (6) G-S(sol) free energy of system = (1) + (5) -126.331 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.76 seconds