Wall clock time and date at job start Fri Apr 10 2020 22:30:30 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 1.52996 * 1 3 3 C 1.52999 * 109.47473 * 2 1 4 4 C 1.52996 * 109.47068 * 120.00380 * 2 1 3 5 5 C 1.53003 * 109.47532 * 180.02562 * 4 2 1 6 6 C 1.53003 * 109.47017 * 299.99933 * 5 4 2 7 7 C 1.53000 * 109.47030 * 299.99712 * 6 5 4 8 8 C 1.52996 * 109.47301 * 179.97438 * 6 5 4 9 9 N 1.46498 * 109.47059 * 179.97438 * 8 6 5 10 10 C 1.34777 * 119.99828 * 179.72339 * 9 8 6 11 11 O 1.21593 * 119.99949 * 0.28071 * 10 9 8 12 12 N 1.34777 * 120.00128 * 180.27942 * 10 9 8 13 13 C 1.46499 * 120.00065 * 180.02562 * 12 10 9 14 14 C 1.53004 * 109.47198 * 179.97438 * 13 12 10 15 15 C 1.52992 * 109.47321 * 179.97438 * 14 13 12 16 16 C 1.50697 * 109.47554 * 180.02562 * 15 14 13 17 17 H 1.08001 * 119.99751 * 0.02562 * 16 15 14 18 18 C 1.37875 * 120.00505 * 180.02562 * 16 15 14 19 19 N 1.31510 * 119.99687 * 0.02562 * 18 16 15 20 20 Si 1.86799 * 120.00201 * 180.02562 * 18 16 15 21 21 H 1.48507 * 109.46991 * 59.99818 * 20 18 16 22 22 H 1.48498 * 109.47276 * 180.02562 * 20 18 16 23 23 H 1.48497 * 109.47355 * 300.00458 * 20 18 16 24 24 C 1.53010 * 109.46927 * 59.99585 * 6 5 4 25 25 C 1.52996 * 109.47146 * 300.00115 * 24 6 5 26 26 H 1.08994 * 109.47089 * 299.99846 * 1 2 3 27 27 H 1.09004 * 109.47066 * 59.99770 * 1 2 3 28 28 H 1.09000 * 109.47234 * 179.97438 * 1 2 3 29 29 H 1.08993 * 109.47675 * 179.97438 * 3 2 1 30 30 H 1.09004 * 109.47162 * 300.00171 * 3 2 1 31 31 H 1.09003 * 109.46711 * 59.99763 * 3 2 1 32 32 H 1.09003 * 109.47532 * 60.00149 * 4 2 1 33 33 H 1.09003 * 109.46851 * 300.00074 * 4 2 1 34 34 H 1.08990 * 109.47421 * 179.97438 * 5 4 2 35 35 H 1.09002 * 109.47073 * 59.99223 * 5 4 2 36 36 H 1.08990 * 109.47258 * 299.99903 * 7 6 5 37 37 H 1.09001 * 109.46739 * 60.00141 * 7 6 5 38 38 H 1.08999 * 109.47407 * 179.97438 * 7 6 5 39 39 H 1.09004 * 109.47066 * 60.00027 * 8 6 5 40 40 H 1.08994 * 109.46974 * 300.00175 * 8 6 5 41 41 H 0.97001 * 120.00384 * 0.02562 * 9 8 6 42 42 H 0.97000 * 119.99549 * 359.97438 * 12 10 9 43 43 H 1.09000 * 109.47602 * 299.99940 * 13 12 10 44 44 H 1.09006 * 109.46868 * 59.99976 * 13 12 10 45 45 H 1.09000 * 109.47211 * 300.00689 * 14 13 12 46 46 H 1.09007 * 109.46376 * 60.00147 * 14 13 12 47 47 H 1.09000 * 109.47686 * 300.00577 * 15 14 13 48 48 H 1.08998 * 109.47284 * 60.00513 * 15 14 13 49 49 H 0.97010 * 119.99934 * 180.02562 * 19 18 16 50 50 H 1.09000 * 109.46753 * 60.00569 * 24 6 5 51 51 H 1.09003 * 109.46863 * 179.97438 * 24 6 5 52 52 H 1.08994 * 109.46974 * 299.99940 * 25 24 6 53 53 H 1.09004 * 109.47066 * 180.02562 * 25 24 6 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 2.0399 -0.7213 1.2492 5 6 3.5700 -0.7208 1.2496 6 6 4.0805 -1.4417 0.0003 7 6 3.5710 -2.8843 -0.0001 8 6 5.6105 -1.4406 0.0004 9 7 6.0993 -2.1314 -1.1955 10 6 7.4245 -2.2488 -1.4115 11 8 8.2143 -1.7860 -0.6112 12 7 7.8742 -2.8794 -2.5145 13 6 9.3146 -3.0075 -2.7490 14 6 9.5530 -3.7591 -4.0602 15 6 11.0573 -3.8924 -4.3055 16 6 11.2921 -4.6321 -5.5972 17 1 10.4524 -4.9727 -6.1848 18 6 12.5790 -4.8741 -6.0290 19 7 13.6015 -4.4598 -5.3133 20 14 12.8700 -5.7904 -7.6306 21 1 12.2511 -5.0375 -8.7512 22 1 14.3301 -5.9210 -7.8680 23 1 12.2600 -7.1416 -7.5458 24 6 3.5705 -0.7203 -1.2490 25 6 2.0405 -0.7208 -1.2493 26 1 -0.3633 0.5138 0.8899 27 1 -0.3633 0.5139 -0.8900 28 1 -0.3634 -1.0277 -0.0005 29 1 3.1300 1.4425 0.0005 30 1 1.6767 1.9563 -0.8900 31 1 1.6767 1.9563 0.8900 32 1 1.6766 -1.7490 1.2491 33 1 1.6766 -0.2075 2.1392 34 1 3.9332 -1.2343 2.1397 35 1 3.9330 0.3070 1.2498 36 1 3.9343 -3.3982 0.8898 37 1 2.4810 -2.8846 -0.0003 38 1 3.9344 -3.3978 -0.8902 39 1 5.9742 -1.9543 0.8904 40 1 5.9731 -0.4128 0.0005 41 1 5.4693 -2.5004 -1.8341 42 1 7.2441 -3.2490 -3.1527 43 1 9.7622 -2.0157 -2.8118 44 1 9.7689 -3.5598 -1.9263 45 1 9.1054 -4.7510 -3.9971 46 1 9.0986 -3.2072 -4.8831 47 1 11.5045 -2.9004 -4.3688 48 1 11.5121 -4.4441 -3.4827 49 1 14.5069 -4.6297 -5.6173 50 1 3.9336 0.3074 -1.2487 51 1 3.9346 -1.2336 -2.1390 52 1 1.6776 -1.7486 -1.2496 53 1 1.6772 -0.2073 -2.1395 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 ZINC000413253708.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Fri Apr 10 2020 22:30:30 Heat of formation + Delta-G solvation = -80.265617 kcal Electronic energy + Delta-G solvation = -26109.208403 eV Core-core repulsion = 22592.818471 eV Total energy + Delta-G solvation = -3516.389931 eV No. of doubly occupied orbitals = 61 Molecular weight (most abundant/longest-lived isotopes) = 310.236 amu Computer time = 0.61 seconds Orbital eigenvalues (eV) -40.83747 -39.50883 -36.33014 -35.21106 -33.44845 -33.05674 -31.24454 -31.03723 -28.72089 -27.95764 -27.15382 -26.31723 -24.21482 -23.31149 -22.72918 -20.76769 -20.31625 -20.10526 -18.21351 -17.82907 -16.55366 -15.98359 -15.79909 -15.51034 -15.35494 -14.72748 -14.68313 -14.55672 -14.39202 -14.17078 -13.82275 -13.69187 -13.51067 -12.79231 -12.55343 -12.42372 -12.33816 -12.25736 -12.18873 -12.15256 -11.79198 -11.70148 -11.61497 -11.46568 -11.17856 -11.05296 -10.86809 -10.69134 -10.60616 -10.44687 -10.33196 -10.23467 -10.04524 -9.82835 -9.41278 -9.11545 -9.11412 -8.53136 -8.35132 -5.99833 -4.02937 2.90270 3.33046 3.37785 3.39728 3.44765 4.16664 4.18065 4.31807 4.42200 4.48470 4.56345 4.67573 4.73532 4.92822 4.98103 5.04470 5.13373 5.17088 5.29676 5.35684 5.36768 5.37494 5.42626 5.51591 5.53556 5.58425 5.66215 5.66878 5.68828 5.72415 5.74295 5.76913 5.82378 5.82818 5.85347 5.98802 6.06293 6.10899 6.22008 6.22437 6.53039 6.57839 6.65814 6.85386 7.05763 7.13540 7.65846 7.79253 7.99099 8.21662 8.40092 8.82704 9.03517 9.60921 11.11367 Molecular weight = 310.24amu Principal moments of inertia in cm(-1) A = 0.031867 B = 0.001909 C = 0.001862 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 878.438357 B =14660.957276 C =15037.644833 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.142 4.142 2 C -0.065 4.065 3 C -0.146 4.146 4 C -0.107 4.107 5 C -0.108 4.108 6 C -0.070 4.070 7 C -0.145 4.145 8 C 0.150 3.850 9 N -0.749 5.749 10 C 0.699 3.301 11 O -0.595 6.595 12 N -0.743 5.743 13 C 0.135 3.865 14 C -0.120 4.120 15 C 0.024 3.976 16 C -0.523 4.523 17 H 0.054 0.946 18 C 0.056 3.944 19 N -0.893 5.893 20 Si 0.894 3.106 21 H -0.277 1.277 22 H -0.287 1.287 23 H -0.277 1.277 24 C -0.111 4.111 25 C -0.109 4.109 26 H 0.053 0.947 27 H 0.053 0.947 28 H 0.053 0.947 29 H 0.063 0.937 30 H 0.052 0.948 31 H 0.052 0.948 32 H 0.065 0.935 33 H 0.061 0.939 34 H 0.065 0.935 35 H 0.069 0.931 36 H 0.056 0.944 37 H 0.063 0.937 38 H 0.054 0.946 39 H 0.064 0.936 40 H 0.063 0.937 41 H 0.393 0.607 42 H 0.393 0.607 43 H 0.061 0.939 44 H 0.061 0.939 45 H 0.053 0.947 46 H 0.053 0.947 47 H 0.019 0.981 48 H 0.019 0.981 49 H 0.261 0.739 50 H 0.068 0.932 51 H 0.062 0.938 52 H 0.065 0.935 53 H 0.060 0.940 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -29.279 8.562 12.371 32.918 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 -0.199 4.199 2 C -0.065 4.065 3 C -0.203 4.203 4 C -0.145 4.145 5 C -0.146 4.146 6 C -0.070 4.070 7 C -0.202 4.202 8 C 0.025 3.975 9 N -0.406 5.406 10 C 0.398 3.602 11 O -0.473 6.473 12 N -0.397 5.397 13 C 0.012 3.988 14 C -0.158 4.158 15 C -0.014 4.014 16 C -0.561 4.561 17 H 0.073 0.927 18 C -0.145 4.145 19 N -0.532 5.532 20 Si 0.721 3.279 21 H -0.203 1.203 22 H -0.213 1.213 23 H -0.203 1.203 24 C -0.148 4.148 25 C -0.147 4.147 26 H 0.072 0.928 27 H 0.072 0.928 28 H 0.072 0.928 29 H 0.082 0.918 30 H 0.071 0.929 31 H 0.071 0.929 32 H 0.084 0.916 33 H 0.080 0.920 34 H 0.084 0.916 35 H 0.087 0.913 36 H 0.075 0.925 37 H 0.082 0.918 38 H 0.073 0.927 39 H 0.082 0.918 40 H 0.081 0.919 41 H 0.227 0.773 42 H 0.226 0.774 43 H 0.080 0.920 44 H 0.080 0.920 45 H 0.072 0.928 46 H 0.072 0.928 47 H 0.038 0.962 48 H 0.038 0.962 49 H 0.071 0.929 50 H 0.087 0.913 51 H 0.080 0.920 52 H 0.084 0.916 53 H 0.079 0.921 Dipole moment (debyes) X Y Z Total from point charges -28.307 8.998 13.128 32.474 hybrid contribution -0.309 -0.859 -1.520 1.773 sum -28.615 8.139 11.608 31.935 Atomic orbital electron populations 1.21867 0.94819 1.01601 1.01623 1.20534 0.94976 0.95623 0.95392 1.21983 1.01672 0.95216 1.01422 1.21612 0.95221 1.00571 0.97082 1.21557 0.95644 1.00764 0.96654 1.20782 0.93693 0.96284 0.96251 1.21973 1.01371 0.94860 1.02011 1.21175 0.91942 0.97104 0.87233 1.45161 1.05429 1.63195 1.26831 1.16038 0.82291 0.79464 0.82373 1.90917 1.54940 1.54259 1.47171 1.45381 1.09427 1.61143 1.23759 1.21493 0.77506 1.00885 0.98904 1.21886 1.01859 0.98428 0.93634 1.19024 0.87997 0.97453 0.96915 1.21167 0.91954 1.36407 1.06563 0.92726 1.25032 0.96284 0.95942 0.97243 1.69960 0.98492 1.46468 1.38315 0.86639 0.77019 0.80301 0.83898 1.20268 1.21279 1.20277 1.21644 0.95481 1.00881 0.96832 1.21634 0.95392 1.00546 0.97082 0.92787 0.92767 0.92793 0.91849 0.92911 0.92938 0.91613 0.92040 0.91635 0.91283 0.92456 0.91792 0.92723 0.91795 0.91859 0.77254 0.77444 0.92016 0.92029 0.92807 0.92812 0.96245 0.96240 0.92889 0.91321 0.91981 0.91641 0.92081 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 -0.72 8.48 37.16 0.31 -0.41 16 2 C -0.07 -0.36 0.77 -154.51 -0.12 -0.48 16 3 C -0.15 -0.84 7.78 37.16 0.29 -0.55 16 4 C -0.11 -0.59 4.46 -26.73 -0.12 -0.71 16 5 C -0.11 -0.68 4.46 -26.73 -0.12 -0.80 16 6 C -0.07 -0.48 0.53 -154.50 -0.08 -0.56 16 7 C -0.15 -0.94 7.61 37.16 0.28 -0.66 16 8 C 0.15 1.49 4.56 -4.04 -0.02 1.47 16 9 N -0.75 -8.24 4.96 -65.23 -0.32 -8.57 16 10 C 0.70 10.97 8.57 -86.92 -0.74 10.22 16 11 O -0.59 -12.04 16.34 5.28 0.09 -11.95 16 12 N -0.74 -11.08 5.56 -65.22 -0.36 -11.44 16 13 C 0.14 2.48 5.67 -4.04 -0.02 2.45 16 14 C -0.12 -2.38 5.27 -26.73 -0.14 -2.52 16 15 C 0.02 0.61 4.97 -27.89 -0.14 0.47 16 16 C -0.52 -14.70 9.11 -34.44 -0.31 -15.01 16 17 H 0.05 1.47 7.74 -52.49 -0.41 1.07 16 18 C 0.06 1.62 5.46 -17.82 -0.10 1.52 16 19 N -0.89 -26.98 13.29 55.43 0.74 -26.24 16 20 Si 0.89 21.60 29.54 -169.99 -5.02 16.58 16 21 H -0.28 -6.56 7.11 56.52 0.40 -6.16 16 22 H -0.29 -6.88 7.11 56.52 0.40 -6.48 16 23 H -0.28 -6.56 7.11 56.52 0.40 -6.16 16 24 C -0.11 -0.73 4.28 -26.73 -0.11 -0.84 16 25 C -0.11 -0.63 4.46 -26.73 -0.12 -0.75 16 26 H 0.05 0.26 8.14 -51.93 -0.42 -0.16 16 27 H 0.05 0.27 8.14 -51.93 -0.42 -0.15 16 28 H 0.05 0.26 8.14 -51.93 -0.42 -0.16 16 29 H 0.06 0.40 4.80 -51.93 -0.25 0.15 16 30 H 0.05 0.30 8.14 -51.93 -0.42 -0.12 16 31 H 0.05 0.29 8.14 -51.93 -0.42 -0.13 16 32 H 0.07 0.36 6.43 -51.93 -0.33 0.03 16 33 H 0.06 0.33 8.14 -51.93 -0.42 -0.09 16 34 H 0.06 0.41 8.14 -51.93 -0.42 -0.01 16 35 H 0.07 0.45 6.43 -51.93 -0.33 0.12 16 36 H 0.06 0.40 8.14 -51.93 -0.42 -0.02 16 37 H 0.06 0.37 4.81 -51.93 -0.25 0.12 16 38 H 0.05 0.36 6.86 -51.93 -0.36 0.00 16 39 H 0.06 0.71 8.14 -51.93 -0.42 0.29 16 40 H 0.06 0.70 8.14 -51.93 -0.42 0.28 16 41 H 0.39 3.31 6.18 -40.82 -0.25 3.06 16 42 H 0.39 4.66 8.49 -40.82 -0.35 4.31 16 43 H 0.06 1.20 8.14 -51.93 -0.42 0.78 16 44 H 0.06 1.20 8.14 -51.93 -0.42 0.78 16 45 H 0.05 1.03 8.14 -51.93 -0.42 0.60 16 46 H 0.05 1.02 8.14 -51.93 -0.42 0.60 16 47 H 0.02 0.53 8.14 -51.93 -0.42 0.10 16 48 H 0.02 0.53 8.14 -51.93 -0.42 0.11 16 49 H 0.26 7.46 8.31 -40.82 -0.34 7.12 16 50 H 0.07 0.50 6.43 -51.93 -0.33 0.17 16 51 H 0.06 0.42 6.86 -51.93 -0.36 0.06 16 52 H 0.06 0.37 6.43 -51.93 -0.33 0.04 16 53 H 0.06 0.36 8.14 -51.93 -0.42 -0.06 16 LS Contribution 395.61 15.07 5.96 5.96 Total: -1.00 -32.67 395.61 -10.06 -42.73 By element: Atomic # 1 Polarization: 9.94 SS G_CDS: -9.87 Total: 0.07 kcal Atomic # 6 Polarization: -5.88 SS G_CDS: -1.26 Total: -7.14 kcal Atomic # 7 Polarization: -46.30 SS G_CDS: 0.05 Total: -46.25 kcal Atomic # 8 Polarization: -12.04 SS G_CDS: 0.09 Total: -11.95 kcal Atomic # 14 Polarization: 21.60 SS G_CDS: -5.02 Total: 16.58 kcal Total LS contribution 5.96 Total: 5.96 kcal Total: -32.67 -10.06 -42.73 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. ZINC000413253708.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 -37.533 kcal (2) G-P(sol) polarization free energy of solvation -32.674 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -70.207 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.058 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.733 kcal (6) G-S(sol) free energy of system = (1) + (5) -80.266 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.61 seconds