Wall clock time and date at job start Mon Mar 8 2021 09:11:53 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= 0 * 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 1.52999 * 1 3 3 C 1.52999 * 109.47432 * 2 1 4 4 C 1.53005 * 109.46690 * 240.00094 * 2 1 3 5 5 Si 1.86298 * 109.47052 * 120.00468 * 2 1 3 6 6 C 1.86294 * 109.47313 * 299.99561 * 5 2 1 7 7 C 1.86302 * 109.46942 * 179.97438 * 5 2 1 8 8 O 1.63096 * 109.47625 * 59.99938 * 5 2 1 9 9 C 1.35892 * 114.00441 * 179.97438 * 8 5 2 10 10 C 1.38776 * 120.01754 * 89.99661 * 9 8 5 11 11 C 1.38220 * 120.09641 * 179.97438 * 10 9 8 12 12 C 1.38112 * 120.12688 * 0.02996 * 11 10 9 13 13 C 1.38979 * 120.03580 * 0.22297 * 12 11 10 14 14 N 1.39739 * 120.04428 * 179.74658 * 13 12 11 15 15 C 1.39215 * 120.00365 * 322.59715 * 14 13 12 16 16 C 1.39301 * 119.71639 * 174.32337 * 15 14 13 17 17 F 1.35094 * 120.47394 * 0.02562 * 16 15 14 18 18 C 1.38503 * 119.05414 * 179.97438 * 16 15 14 19 19 C 1.38850 * 118.48594 * 359.97438 * 18 16 15 20 20 C 1.50700 * 120.32806 * 179.97438 * 19 18 16 21 21 O 1.42900 * 109.46864 * 299.99924 * 20 19 18 22 22 Si 1.86303 * 109.47211 * 180.02562 * 20 19 18 23 23 H 1.48494 * 109.46914 * 180.02562 * 22 20 19 24 24 H 1.48506 * 109.46737 * 299.99677 * 22 20 19 25 25 H 1.48491 * 109.47218 * 59.99778 * 22 20 19 26 26 C 1.38054 * 119.34501 * 0.02562 * 19 18 16 27 27 N 1.31959 * 120.89892 * 359.72585 * 26 19 18 28 28 C 1.38611 * 120.02181 * 269.97441 * 9 8 5 29 29 H 1.09003 * 109.46851 * 299.99663 * 1 2 3 30 30 H 1.09003 * 109.47037 * 59.99798 * 1 2 3 31 31 H 1.09000 * 109.47502 * 179.97438 * 1 2 3 32 32 H 1.09002 * 109.47231 * 180.02562 * 3 2 1 33 33 H 1.08993 * 109.47161 * 300.00163 * 3 2 1 34 34 H 1.09003 * 109.46828 * 60.00322 * 3 2 1 35 35 H 1.08993 * 109.47598 * 299.99727 * 4 2 1 36 36 H 1.08993 * 109.47263 * 60.00229 * 4 2 1 37 37 H 1.09002 * 109.46955 * 180.02562 * 4 2 1 38 38 H 1.08993 * 109.47507 * 180.02562 * 6 5 2 39 39 H 1.09002 * 109.47358 * 300.00423 * 6 5 2 40 40 H 1.08996 * 109.47272 * 59.99843 * 6 5 2 41 41 H 1.08999 * 109.47420 * 299.99558 * 7 5 2 42 42 H 1.09000 * 109.47255 * 59.99876 * 7 5 2 43 43 H 1.09003 * 109.46928 * 179.97438 * 7 5 2 44 44 H 1.08004 * 119.95369 * 0.02562 * 10 9 8 45 45 H 1.08001 * 119.93590 * 179.97438 * 11 10 9 46 46 H 1.08004 * 119.97939 * 179.97438 * 12 11 10 47 47 H 0.97003 * 119.99634 * 142.59920 * 14 13 12 48 48 H 1.07999 * 120.75642 * 179.97438 * 18 16 15 49 49 H 1.09000 * 109.47200 * 59.99940 * 20 19 18 50 50 H 0.96705 * 113.99722 * 179.97438 * 21 20 19 51 51 H 1.08002 * 119.54845 * 180.02562 * 26 19 18 52 52 H 1.08004 * 120.06386 * 0.02562 * 28 9 8 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 2.0401 1.4425 0.0000 4 6 2.0399 -0.7213 -1.2493 5 14 2.1510 -0.8783 1.5211 6 6 1.5301 -0.0002 3.0422 7 6 4.0140 -0.8790 1.5206 8 8 1.6074 -2.4160 1.5211 9 6 2.0088 -3.1443 2.5958 10 6 1.2330 -3.1695 3.7463 11 6 1.6395 -3.9102 4.8402 12 6 2.8191 -4.6270 4.7925 13 6 3.6028 -4.6013 3.6450 14 7 4.7989 -5.3222 3.5985 15 6 5.6060 -5.4056 4.7297 16 6 6.7351 -6.2213 4.7139 17 9 7.0521 -6.9310 3.6090 18 6 7.5286 -6.2936 5.8468 19 6 7.1652 -5.5456 6.9587 20 6 7.9983 -5.5936 8.2135 21 8 8.0429 -6.9348 8.7046 22 14 7.2405 -4.4850 9.5049 23 1 8.0619 -4.5319 10.7411 24 1 7.1937 -3.0911 8.9948 25 1 5.8625 -4.9479 9.8077 26 6 6.0325 -4.7583 6.9037 27 7 5.2971 -4.7045 5.8093 28 6 3.1930 -3.8627 2.5436 29 1 -0.3633 0.5138 0.8900 30 1 -0.3633 0.5139 -0.8900 31 1 -0.3634 -1.0276 -0.0005 32 1 3.1301 1.4424 -0.0005 33 1 1.6768 1.9563 -0.8899 34 1 1.6768 1.9563 0.8900 35 1 1.6766 -1.7489 -1.2494 36 1 1.6766 -0.2074 -2.1392 37 1 3.1299 -0.7217 -1.2491 38 1 1.8938 -0.5138 3.9321 39 1 1.8934 1.0275 3.0423 40 1 0.4402 -0.0001 3.0423 41 1 4.3770 -1.3931 0.6307 42 1 4.3777 0.1485 1.5205 43 1 4.3773 -1.3925 2.4108 44 1 0.3099 -2.6103 3.7866 45 1 1.0340 -3.9276 5.7343 46 1 3.1346 -5.2045 5.6489 47 1 5.0669 -5.7646 2.7778 48 1 8.4099 -6.9176 5.8649 49 1 9.0100 -5.2543 7.9912 50 1 8.5638 -7.0408 9.5125 51 1 5.7470 -4.1749 7.7665 52 1 3.7981 -3.8442 1.6491 RHF calculation, no. of doubly occupied orbitals= 68 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=0 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 s_27_17313438_17656566.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Mon Mar 8 2021 09:11:53 Heat of formation + Delta-G solvation = -92.190111 kcal Electronic energy + Delta-G solvation = -32724.704060 eV Core-core repulsion = 28341.437458 eV Total energy + Delta-G solvation = -4383.266602 eV No. of doubly occupied orbitals = 68 Molecular weight (most abundant/longest-lived isotopes) = 378.169 amu Computer time = 1.12 seconds Orbital eigenvalues (eV) -49.95844 -41.73609 -40.73568 -38.61802 -37.72233 -36.90238 -36.09923 -33.49023 -32.31761 -30.91045 -29.92675 -29.26393 -29.04103 -27.91290 -27.41720 -26.70826 -25.22356 -23.60502 -23.23384 -22.48434 -20.53567 -19.59239 -19.34754 -18.67087 -18.08269 -17.89116 -17.24758 -17.11807 -16.93137 -16.50592 -16.28263 -16.11657 -15.93522 -15.63878 -15.14646 -14.97835 -14.90311 -14.79926 -14.72109 -14.53938 -14.26577 -14.04148 -13.94830 -13.83988 -13.54990 -13.42432 -13.29085 -13.15815 -12.97359 -12.95894 -12.70232 -12.63717 -12.46038 -12.29293 -12.15765 -12.11211 -11.98756 -11.83306 -11.69634 -11.65177 -10.84897 -10.74265 -10.53576 -10.43958 -10.14099 -9.94859 -9.40276 -8.55829 -0.25900 -0.02892 0.35426 0.54447 1.00661 1.31649 1.32755 1.40375 1.65203 1.79869 1.81809 1.97054 2.36437 2.44169 2.90011 2.95579 3.11478 3.26943 3.55140 3.75613 3.93832 4.03426 4.06143 4.06637 4.18863 4.20603 4.27900 4.36314 4.38858 4.44924 4.57419 4.61384 4.69288 4.70735 4.73446 4.75912 4.77484 4.78889 4.81222 4.91045 4.95544 5.05702 5.06061 5.14991 5.18501 5.30144 5.37784 5.38921 5.40622 5.43966 5.51496 5.53842 5.58082 5.60705 5.94131 6.07975 6.27105 6.45044 6.83781 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.136 4.136 2 C -0.372 4.372 3 C -0.137 4.137 4 C -0.136 4.136 5 Si 1.282 2.718 6 C -0.506 4.506 7 C -0.506 4.506 8 O -0.560 6.560 9 C 0.151 3.849 10 C -0.173 4.173 11 C -0.075 4.075 12 C -0.132 4.132 13 C 0.187 3.813 14 N -0.658 5.658 15 C 0.375 3.625 16 C -0.005 4.005 17 F -0.130 7.130 18 C -0.036 4.036 19 C -0.151 4.151 20 C -0.071 4.071 21 O -0.545 6.545 22 Si 0.937 3.063 23 H -0.251 1.251 24 H -0.245 1.245 25 H -0.242 1.242 26 C 0.137 3.863 27 N -0.494 5.494 28 C -0.188 4.188 29 H 0.056 0.944 30 H 0.055 0.945 31 H 0.059 0.941 32 H 0.057 0.943 33 H 0.058 0.942 34 H 0.057 0.943 35 H 0.059 0.941 36 H 0.055 0.945 37 H 0.055 0.945 38 H 0.073 0.927 39 H 0.075 0.925 40 H 0.073 0.927 41 H 0.072 0.928 42 H 0.076 0.924 43 H 0.071 0.929 44 H 0.132 0.868 45 H 0.132 0.868 46 H 0.133 0.867 47 H 0.423 0.577 48 H 0.154 0.846 49 H 0.081 0.919 50 H 0.383 0.617 51 H 0.160 0.840 52 H 0.132 0.868 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 2.300 1.298 2.827 3.868 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 -0.193 4.193 2 C -0.416 4.416 3 C -0.194 4.194 4 C -0.193 4.193 5 Si 1.416 2.584 6 C -0.609 4.609 7 C -0.609 4.609 8 O -0.514 6.514 9 C 0.107 3.893 10 C -0.193 4.193 11 C -0.094 4.094 12 C -0.153 4.153 13 C 0.091 3.909 14 N -0.285 5.285 15 C 0.140 3.860 16 C -0.031 4.031 17 F -0.109 7.109 18 C -0.062 4.062 19 C -0.156 4.156 20 C -0.182 4.182 21 O -0.351 6.351 22 Si 0.758 3.242 23 H -0.174 1.174 24 H -0.169 1.169 25 H -0.165 1.165 26 C -0.021 4.021 27 N -0.209 5.209 28 C -0.209 4.209 29 H 0.075 0.925 30 H 0.074 0.926 31 H 0.078 0.922 32 H 0.076 0.924 33 H 0.077 0.923 34 H 0.076 0.924 35 H 0.078 0.922 36 H 0.074 0.926 37 H 0.074 0.926 38 H 0.092 0.908 39 H 0.095 0.905 40 H 0.092 0.908 41 H 0.091 0.909 42 H 0.095 0.905 43 H 0.090 0.910 44 H 0.150 0.850 45 H 0.150 0.850 46 H 0.150 0.850 47 H 0.262 0.738 48 H 0.172 0.828 49 H 0.099 0.901 50 H 0.231 0.769 51 H 0.177 0.823 52 H 0.150 0.850 Dipole moment (debyes) X Y Z Total from point charges 0.578 2.114 2.715 3.489 hybrid contribution 1.714 -0.658 -0.455 1.892 sum 2.292 1.455 2.260 3.533 Atomic orbital electron populations 1.21536 0.93660 1.02092 1.02011 1.25742 1.00808 1.02732 1.12351 1.21556 1.00848 0.94702 1.02304 1.21534 1.00695 1.00246 0.96822 0.76995 0.63560 0.52361 0.65496 1.26983 1.06965 1.09314 1.17610 1.27002 1.24286 1.04831 1.04769 1.83792 1.77805 1.45204 1.44617 1.17654 0.92099 0.94172 0.85353 1.21268 1.01557 1.03783 0.92682 1.20871 0.95523 0.95068 0.97894 1.21043 0.93997 1.01983 0.98272 1.17299 0.85476 0.93216 0.94887 1.41903 1.20076 1.54753 1.11722 1.18335 0.88017 0.91186 0.88508 1.17943 0.98652 1.00160 0.86337 1.91512 1.92544 1.76458 1.50348 1.21285 0.98812 0.96391 0.89729 1.19953 0.98296 1.01746 0.95581 1.24529 1.02685 0.91742 0.99236 1.86502 1.76149 1.25591 1.46904 0.85869 0.81565 0.78645 0.78077 1.17445 1.16850 1.16532 1.22383 0.89313 0.95364 0.95002 1.67470 1.31955 1.22252 0.99204 1.20932 0.98515 1.01475 1.00010 0.92532 0.92575 0.92159 0.92446 0.92315 0.92387 0.92189 0.92556 0.92615 0.90810 0.90546 0.90751 0.90930 0.90541 0.90970 0.85030 0.85037 0.84955 0.73773 0.82808 0.90131 0.76911 0.82274 0.84988 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 -0.14 -0.02 7.85 37.16 0.29 0.27 16 2 C -0.37 0.02 0.53 -90.62 -0.05 -0.03 16 3 C -0.14 0.07 7.85 37.16 0.29 0.36 16 4 C -0.14 -0.03 7.85 37.16 0.29 0.26 16 5 Si 1.28 -0.15 8.27 -169.99 -1.41 -1.55 16 6 C -0.51 -0.01 8.31 101.05 0.84 0.83 16 7 C -0.51 -0.17 8.31 101.05 0.84 0.67 16 8 O -0.56 -0.97 8.52 -19.40 -0.17 -1.14 16 9 C 0.15 0.31 4.63 -39.24 -0.18 0.13 16 10 C -0.17 -0.24 8.77 -39.39 -0.35 -0.59 16 11 C -0.07 -0.08 10.03 -39.63 -0.40 -0.47 16 12 C -0.13 -0.27 8.57 -39.35 -0.34 -0.61 16 13 C 0.19 0.39 6.21 -83.77 -0.52 -0.13 16 14 N -0.66 -0.90 5.47 -9.92 -0.05 -0.96 16 15 C 0.37 0.82 7.18 -154.77 -1.11 -0.29 16 16 C -0.01 -0.01 7.35 -39.09 -0.29 -0.30 16 17 F -0.13 -0.25 16.66 2.25 0.04 -0.22 16 18 C -0.04 -0.02 9.75 -39.26 -0.38 -0.41 16 19 C -0.15 -0.03 5.43 -104.46 -0.57 -0.60 16 20 C -0.07 0.14 2.83 36.01 0.10 0.24 16 21 O -0.55 0.75 12.75 -35.23 -0.45 0.30 16 22 Si 0.94 -1.99 25.10 -169.99 -4.27 -6.25 16 23 H -0.25 0.47 7.11 56.52 0.40 0.87 16 24 H -0.24 0.39 7.11 56.52 0.40 0.79 16 25 H -0.24 0.19 7.11 56.52 0.40 0.60 16 26 C 0.14 0.12 9.84 -17.56 -0.17 -0.05 16 27 N -0.49 -1.17 7.42 -12.34 -0.09 -1.27 16 28 C -0.19 -0.34 8.69 -39.24 -0.34 -0.68 16 29 H 0.06 -0.03 7.79 -51.93 -0.40 -0.44 16 30 H 0.06 0.01 8.14 -51.93 -0.42 -0.41 16 31 H 0.06 0.02 7.97 -51.93 -0.41 -0.39 16 32 H 0.06 -0.06 7.79 -51.93 -0.40 -0.47 16 33 H 0.06 -0.02 8.14 -51.93 -0.42 -0.44 16 34 H 0.06 -0.07 7.79 -51.93 -0.40 -0.47 16 35 H 0.06 0.03 7.96 -51.93 -0.41 -0.39 16 36 H 0.06 0.02 8.14 -51.93 -0.42 -0.41 16 37 H 0.05 -0.02 7.79 -51.93 -0.40 -0.43 16 38 H 0.07 0.03 7.38 -51.93 -0.38 -0.35 16 39 H 0.08 -0.04 7.79 -51.93 -0.40 -0.45 16 40 H 0.07 -0.02 7.79 -51.93 -0.40 -0.43 16 41 H 0.07 0.01 7.79 -51.93 -0.40 -0.39 16 42 H 0.08 -0.02 7.79 -51.93 -0.40 -0.43 16 43 H 0.07 0.08 7.38 -51.93 -0.38 -0.30 16 44 H 0.13 0.00 8.06 -52.48 -0.42 -0.42 16 45 H 0.13 -0.14 8.06 -52.49 -0.42 -0.56 16 46 H 0.13 0.29 6.62 -52.48 -0.35 -0.06 16 47 H 0.42 -0.14 8.31 -40.82 -0.34 -0.48 16 48 H 0.15 -0.13 8.06 -52.49 -0.42 -0.55 16 49 H 0.08 -0.31 7.96 -51.93 -0.41 -0.72 16 50 H 0.38 -2.16 8.74 45.56 0.40 -1.77 16 51 H 0.16 -0.15 4.88 -52.49 -0.26 -0.41 16 52 H 0.13 0.08 8.06 -52.48 -0.42 -0.34 16 LS Contribution 421.67 15.07 6.35 6.35 Total: 0.00 -5.72 421.67 -9.62 -15.34 By element: Atomic # 1 Polarization: -1.67 SS G_CDS: -7.54 Total: -9.22 kcal Atomic # 6 Polarization: 0.64 SS G_CDS: -2.04 Total: -1.39 kcal Atomic # 7 Polarization: -2.08 SS G_CDS: -0.15 Total: -2.22 kcal Atomic # 8 Polarization: -0.22 SS G_CDS: -0.61 Total: -0.84 kcal Atomic # 9 Polarization: -0.25 SS G_CDS: 0.04 Total: -0.22 kcal Atomic # 14 Polarization: -2.13 SS G_CDS: -5.67 Total: -7.81 kcal Total LS contribution 6.35 Total: 6.35 kcal Total: -5.72 -9.62 -15.34 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. s_27_17313438_17656566.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 -76.850 kcal (2) G-P(sol) polarization free energy of solvation -5.717 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -82.568 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.623 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -15.340 kcal (6) G-S(sol) free energy of system = (1) + (5) -92.190 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.12 seconds