Wall clock time and date at job start Wed Apr 1 2020 01:44:37 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 1.52995 * 1 3 3 C 1.53009 * 109.47144 * 2 1 4 4 C 1.52995 * 109.47144 * 180.02562 * 3 2 1 5 5 C 1.53001 * 109.47260 * 179.97438 * 4 3 2 6 6 C 1.52998 * 109.46840 * 59.99620 * 5 4 3 7 7 F 1.39906 * 109.46813 * 299.99847 * 5 4 3 8 8 C 1.50696 * 109.47323 * 180.02562 * 5 4 3 9 9 O 1.21284 * 120.00064 * 359.97438 * 8 5 4 10 10 N 1.34771 * 120.00249 * 180.02562 * 8 5 4 11 11 C 1.46504 * 120.00474 * 179.97438 * 10 8 5 12 12 C 1.52998 * 109.47045 * 179.97438 * 11 10 8 13 13 H 1.08996 * 109.90062 * 59.48893 * 12 11 10 14 14 C 1.54479 * 109.82734 * 180.42299 * 12 11 10 15 15 C 1.55505 * 102.38841 * 140.87881 * 14 12 11 16 16 C 1.53890 * 100.75845 * 327.02889 * 15 14 12 17 17 C 1.52370 * 115.68015 * 263.23572 * 16 15 14 18 18 N 1.47272 * 87.70257 * 218.74210 * 17 16 15 19 19 C 1.36934 * 135.93786 * 206.13715 * 18 17 16 20 20 H 1.08004 * 119.99943 * 7.56354 * 19 18 17 21 21 C 1.38813 * 120.00459 * 187.56083 * 19 18 17 22 22 N 1.31612 * 120.00291 * 174.51861 * 21 19 18 23 23 Si 1.86797 * 119.99617 * 354.51417 * 21 19 18 24 24 H 1.48506 * 109.46986 * 174.95163 * 23 21 19 25 25 H 1.48497 * 109.47404 * 294.95372 * 23 21 19 26 26 H 1.48502 * 109.47140 * 54.95629 * 23 21 19 27 27 C 1.47271 * 88.12775 * 26.40009 * 18 17 16 28 28 O 1.42412 * 106.66675 * 34.97502 * 16 15 14 29 29 H 1.08994 * 109.47413 * 180.02562 * 1 2 3 30 30 H 1.09008 * 109.47507 * 300.00425 * 1 2 3 31 31 H 1.09004 * 109.47602 * 59.99903 * 1 2 3 32 32 H 1.08997 * 109.46931 * 239.99957 * 2 1 3 33 33 H 1.08997 * 109.46940 * 119.99557 * 2 1 3 34 34 H 1.08999 * 109.47002 * 59.99418 * 3 2 1 35 35 H 1.09007 * 109.46804 * 299.99739 * 3 2 1 36 36 H 1.09005 * 109.46792 * 59.99719 * 4 3 2 37 37 H 1.08996 * 109.46974 * 300.00113 * 4 3 2 38 38 H 1.09001 * 109.47059 * 179.97438 * 6 5 4 39 39 H 1.08994 * 109.47509 * 300.00265 * 6 5 4 40 40 H 1.09004 * 109.46919 * 60.00887 * 6 5 4 41 41 H 0.97002 * 119.99961 * 359.97438 * 10 8 5 42 42 H 1.09005 * 109.46634 * 59.99832 * 11 10 8 43 43 H 1.08996 * 109.46844 * 300.00402 * 11 10 8 44 44 H 1.08999 * 110.82108 * 259.09937 * 14 12 11 45 45 H 1.09002 * 110.82070 * 22.45670 * 14 12 11 46 46 H 1.08995 * 111.16272 * 209.15517 * 15 14 12 47 47 H 1.08998 * 111.16093 * 84.89706 * 15 14 12 48 48 H 1.09002 * 113.51597 * 104.03281 * 17 16 15 49 49 H 1.09004 * 113.51581 * 333.44833 * 17 16 15 50 50 H 0.97007 * 120.00029 * 354.90224 * 22 21 19 51 51 H 1.09000 * 113.51590 * 88.30722 * 27 18 17 52 52 H 1.09005 * 113.51399 * 218.89389 * 27 18 17 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 6 3.5699 1.4426 -0.0006 5 6 4.0800 2.8851 -0.0013 6 6 3.5704 3.6067 1.2479 7 9 3.6131 3.5442 -1.1437 8 6 5.5869 2.8851 -0.0026 9 8 6.1934 1.8348 -0.0024 10 7 6.2608 4.0522 -0.0028 11 6 7.7259 4.0523 -0.0034 12 6 8.2358 5.4948 -0.0042 13 1 7.8692 6.0183 0.8787 14 6 9.7805 5.5045 -0.0157 15 6 10.0996 6.6869 -0.9739 16 6 8.9157 6.5912 -1.9524 17 6 9.1894 5.8381 -3.2484 18 7 8.3670 6.8462 -3.9385 19 6 7.6104 6.8856 -5.0791 20 1 7.4286 5.9796 -5.6381 21 6 7.0769 8.0900 -5.5170 22 7 6.4416 8.1486 -6.6681 23 14 7.2607 9.6276 -4.4723 24 1 6.7172 10.7957 -5.2109 25 1 6.5133 9.4545 -3.2009 26 1 8.6977 9.8550 -4.1747 27 6 8.7194 7.7955 -2.8691 28 8 7.7892 6.1686 -1.1905 29 1 -0.3634 -1.0276 0.0005 30 1 -0.3634 0.5139 0.8900 31 1 -0.3634 0.5138 -0.8900 32 1 1.8932 -0.5138 -0.8900 33 1 1.8932 -0.5138 0.8900 34 1 1.6766 1.9564 0.8899 35 1 1.6766 1.9564 -0.8901 36 1 3.9329 0.9288 -0.8909 37 1 3.9336 0.9286 0.8891 38 1 3.9341 4.6342 1.2477 39 1 2.4805 3.6067 1.2484 40 1 3.9342 3.0931 2.1379 41 1 5.7758 4.8923 -0.0025 42 1 8.0887 3.5385 -0.8937 43 1 8.0896 3.5384 0.8863 44 1 10.1741 5.6975 0.9823 45 1 10.1709 4.5662 -0.4097 46 1 11.0482 6.5319 -1.4878 47 1 10.0937 7.6378 -0.4411 48 1 8.7585 4.8371 -3.2691 49 1 10.2376 5.8534 -3.5472 50 1 6.4097 7.3692 -7.2448 51 1 9.6385 8.3482 -3.0637 52 1 7.8931 8.4408 -2.5707 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) F: (AM1): M.J.S. DEWAR AND E. G. ZOEBISCH, THEOCHEM, 180, 1 (1988). 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 ZINC001724869588.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 01:44:37 Heat of formation + Delta-G solvation = -83.929353 kcal Electronic energy + Delta-G solvation = -31296.272378 eV Core-core repulsion = 27018.898886 eV Total energy + Delta-G solvation = -4277.373492 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 342.211 amu Computer time = 0.98 seconds Orbital eigenvalues (eV) -47.97591 -40.43958 -39.65334 -37.00925 -36.33540 -34.64112 -33.21303 -32.36471 -32.08546 -29.89045 -28.83139 -27.11011 -25.73585 -25.49656 -24.11642 -22.54714 -21.61622 -21.19629 -20.98239 -19.93299 -19.31833 -17.88757 -17.40216 -16.83273 -16.41897 -16.29203 -15.82276 -15.58944 -15.23036 -15.08044 -14.66858 -14.38071 -14.01380 -13.91023 -13.76532 -13.51723 -13.27108 -13.15408 -13.13416 -12.93821 -12.70246 -12.56534 -12.52343 -12.45667 -12.17362 -11.75905 -11.64183 -11.59143 -11.46010 -11.41660 -11.29219 -10.88735 -10.82892 -10.73230 -10.62162 -10.42601 -10.35669 -9.82921 -9.55733 -9.20626 -9.07627 -8.88986 -8.84349 -7.12092 -6.23435 -3.16287 2.32786 2.86045 3.42399 3.48154 3.66686 3.78071 4.10640 4.21602 4.31882 4.44012 4.51756 4.58291 4.64892 4.73725 4.73976 4.80564 4.88681 4.89641 4.96894 5.09820 5.10626 5.22667 5.30013 5.36821 5.41950 5.44168 5.48890 5.51108 5.53849 5.55523 5.67028 5.70180 5.73284 5.78747 5.84372 5.91738 5.92166 6.03402 6.04682 6.10853 6.16614 6.22429 6.24577 6.31231 6.40949 6.52629 7.15033 7.30173 7.43418 7.96511 8.29831 9.03659 9.55650 10.40827 11.26900 Molecular weight = 342.21amu Principal moments of inertia in cm(-1) A = 0.011188 B = 0.002987 C = 0.002536 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2501.985649 B = 9371.883986 C =11039.620895 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.153 4.153 2 C -0.123 4.123 3 C -0.124 4.124 4 C -0.124 4.124 5 C 0.106 3.894 6 C -0.175 4.175 7 F -0.187 7.187 8 C 0.500 3.500 9 O -0.530 6.530 10 N -0.707 5.707 11 C 0.111 3.889 12 C 0.063 3.937 13 H 0.085 0.915 14 C -0.143 4.143 15 C -0.138 4.138 16 C 0.070 3.930 17 C 0.110 3.890 18 N -0.620 5.620 19 C -0.298 4.298 20 H 0.082 0.918 21 C -0.026 4.026 22 N -0.936 5.936 23 Si 1.070 2.930 24 H -0.295 1.295 25 H -0.291 1.291 26 H -0.288 1.288 27 C 0.102 3.898 28 O -0.332 6.332 29 H 0.053 0.947 30 H 0.053 0.947 31 H 0.055 0.945 32 H 0.063 0.937 33 H 0.061 0.939 34 H 0.067 0.933 35 H 0.071 0.929 36 H 0.082 0.918 37 H 0.086 0.914 38 H 0.073 0.927 39 H 0.084 0.916 40 H 0.080 0.920 41 H 0.409 0.591 42 H 0.075 0.925 43 H 0.078 0.922 44 H 0.082 0.918 45 H 0.081 0.919 46 H 0.087 0.913 47 H 0.080 0.920 48 H 0.048 0.952 49 H 0.046 0.954 50 H 0.260 0.740 51 H 0.059 0.941 52 H 0.061 0.939 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -2.048 -10.780 22.229 24.789 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 -0.210 4.210 2 C -0.161 4.161 3 C -0.162 4.162 4 C -0.162 4.162 5 C 0.085 3.915 6 C -0.233 4.233 7 F -0.168 7.168 8 C 0.284 3.716 9 O -0.407 6.407 10 N -0.358 5.358 11 C -0.013 4.013 12 C 0.005 3.995 13 H 0.103 0.897 14 C -0.181 4.181 15 C -0.177 4.177 16 C 0.030 3.970 17 C -0.017 4.017 18 N -0.348 5.348 19 C -0.424 4.424 20 H 0.100 0.900 21 C -0.224 4.224 22 N -0.579 5.579 23 Si 0.903 3.097 24 H -0.223 1.223 25 H -0.219 1.219 26 H -0.215 1.215 27 C -0.024 4.024 28 O -0.250 6.250 29 H 0.072 0.928 30 H 0.072 0.928 31 H 0.074 0.926 32 H 0.082 0.918 33 H 0.080 0.920 34 H 0.086 0.914 35 H 0.089 0.911 36 H 0.101 0.899 37 H 0.105 0.895 38 H 0.092 0.908 39 H 0.103 0.897 40 H 0.099 0.901 41 H 0.244 0.756 42 H 0.093 0.907 43 H 0.096 0.904 44 H 0.101 0.899 45 H 0.099 0.901 46 H 0.105 0.895 47 H 0.099 0.901 48 H 0.066 0.934 49 H 0.064 0.936 50 H 0.070 0.930 51 H 0.076 0.924 52 H 0.079 0.921 Dipole moment (debyes) X Y Z Total from point charges -2.409 -9.882 21.978 24.217 hybrid contribution 0.484 -1.240 -0.281 1.361 sum -1.926 -11.122 21.696 24.457 Atomic orbital electron populations 1.21775 0.95780 1.01564 1.01908 1.21499 0.95886 0.96495 1.02210 1.21708 0.94037 0.97492 1.02930 1.21963 0.96286 0.92871 1.05061 1.21167 0.90600 0.94929 0.84845 1.22462 1.03648 1.01274 0.95912 1.92973 1.89424 1.82399 1.51958 1.20798 0.89745 0.84225 0.76849 1.90709 1.69656 1.31158 1.49133 1.45856 1.07614 1.08851 1.73509 1.21870 0.79674 0.96916 1.02800 1.23089 0.94708 0.91713 0.90016 0.89703 1.23064 0.93997 1.00106 1.00974 1.23003 0.99294 0.98488 0.96922 1.23169 0.84708 0.98284 0.90885 1.22697 0.94987 0.95006 0.89031 1.45886 1.53744 1.09088 1.26114 1.20132 1.26798 0.96502 0.98975 0.90044 1.25701 0.98046 0.99805 0.98880 1.70905 1.44818 1.32346 1.09795 0.83728 0.75741 0.75997 0.74256 1.22255 1.21929 1.21543 1.22845 0.99184 0.93441 0.86898 1.88380 1.29171 1.74503 1.32938 0.92805 0.92797 0.92590 0.91828 0.91989 0.91419 0.91077 0.89947 0.89518 0.90797 0.89683 0.90132 0.75557 0.90678 0.90430 0.89938 0.90069 0.89489 0.90111 0.93389 0.93620 0.92992 0.92399 0.92094 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -1.07 9.91 37.16 0.37 -0.70 16 2 C -0.12 -0.96 5.93 -26.73 -0.16 -1.12 16 3 C -0.12 -1.08 4.74 -26.73 -0.13 -1.21 16 4 C -0.12 -1.30 3.83 -26.73 -0.10 -1.40 16 5 C 0.11 1.24 1.19 -91.77 -0.11 1.13 16 6 C -0.18 -1.45 8.47 37.16 0.31 -1.13 16 7 F -0.19 -2.74 16.27 2.25 0.04 -2.70 16 8 C 0.50 6.99 6.87 -10.99 -0.08 6.91 16 9 O -0.53 -8.76 15.98 5.55 0.09 -8.67 16 10 N -0.71 -9.24 5.36 -60.29 -0.32 -9.57 16 11 C 0.11 1.38 5.23 -4.04 -0.02 1.36 16 12 C 0.06 0.76 3.62 -25.96 -0.09 0.67 16 13 H 0.09 0.86 8.14 -51.93 -0.42 0.43 16 14 C -0.14 -1.43 6.56 -24.62 -0.16 -1.59 16 15 C -0.14 -1.68 6.49 -24.94 -0.16 -1.85 16 16 C 0.07 1.24 1.56 -90.68 -0.14 1.10 16 17 C 0.11 2.24 8.24 -7.89 -0.06 2.17 16 18 N -0.62 -15.94 3.70 -184.87 -0.68 -16.62 16 19 C -0.30 -8.99 11.08 -15.06 -0.17 -9.16 16 20 H 0.08 2.61 8.06 -52.48 -0.42 2.18 16 21 C -0.03 -0.80 5.50 -17.43 -0.10 -0.90 16 22 N -0.94 -30.51 13.70 55.49 0.76 -29.75 16 23 Si 1.07 27.55 25.17 -169.99 -4.28 23.27 16 24 H -0.30 -7.68 7.11 56.52 0.40 -7.27 16 25 H -0.29 -7.19 6.49 56.52 0.37 -6.82 16 26 H -0.29 -6.79 6.18 56.52 0.35 -6.44 16 27 C 0.10 2.19 5.25 -7.76 -0.04 2.15 16 28 O -0.33 -5.78 10.69 -35.23 -0.38 -6.16 16 29 H 0.05 0.34 8.14 -51.93 -0.42 -0.08 16 30 H 0.05 0.34 8.14 -51.92 -0.42 -0.08 16 31 H 0.05 0.40 8.14 -51.93 -0.42 -0.02 16 32 H 0.06 0.52 8.14 -51.93 -0.42 0.10 16 33 H 0.06 0.44 8.14 -51.93 -0.42 0.02 16 34 H 0.07 0.50 6.43 -51.93 -0.33 0.16 16 35 H 0.07 0.70 7.80 -51.93 -0.41 0.29 16 36 H 0.08 1.00 8.10 -51.93 -0.42 0.58 16 37 H 0.09 0.84 8.10 -51.93 -0.42 0.41 16 38 H 0.07 0.58 7.56 -51.93 -0.39 0.18 16 39 H 0.08 0.60 6.43 -51.93 -0.33 0.27 16 40 H 0.08 0.55 8.14 -51.93 -0.42 0.13 16 41 H 0.41 5.06 7.82 -40.82 -0.32 4.75 16 42 H 0.07 1.10 8.14 -51.93 -0.42 0.67 16 43 H 0.08 0.82 8.14 -51.93 -0.42 0.40 16 44 H 0.08 0.61 8.14 -51.93 -0.42 0.19 16 45 H 0.08 0.78 7.85 -51.93 -0.41 0.37 16 46 H 0.09 0.96 7.93 -51.93 -0.41 0.55 16 47 H 0.08 0.89 8.14 -51.93 -0.42 0.46 16 48 H 0.05 1.01 8.14 -51.93 -0.42 0.59 16 49 H 0.05 0.85 7.99 -51.93 -0.41 0.44 16 50 H 0.26 8.39 8.73 -40.82 -0.36 8.04 16 51 H 0.06 1.17 7.59 -51.93 -0.39 0.77 16 52 H 0.06 1.39 4.80 -51.93 -0.25 1.14 16 LS Contribution 408.01 15.07 6.15 6.15 Total: -1.00 -36.50 408.01 -8.70 -45.20 By element: Atomic # 1 Polarization: 11.66 SS G_CDS: -9.24 Total: 2.42 kcal Atomic # 6 Polarization: -2.72 SS G_CDS: -0.84 Total: -3.56 kcal Atomic # 7 Polarization: -55.70 SS G_CDS: -0.25 Total: -55.94 kcal Atomic # 8 Polarization: -14.55 SS G_CDS: -0.29 Total: -14.83 kcal Atomic # 9 Polarization: -2.74 SS G_CDS: 0.04 Total: -2.70 kcal Atomic # 14 Polarization: 27.55 SS G_CDS: -4.28 Total: 23.27 kcal Total LS contribution 6.15 Total: 6.15 kcal Total: -36.50 -8.70 -45.20 kcal The number of atoms in the molecule is 52 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. ZINC001724869588.mol2 52 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 -38.726 kcal (2) G-P(sol) polarization free energy of solvation -36.500 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -75.225 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.704 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.204 kcal (6) G-S(sol) free energy of system = (1) + (5) -83.929 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.98 seconds