Wall clock time and date at job start Sat Apr 11 2020 06:11:40 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 O 1.42906 * 1 3 3 C 1.42901 * 114.00219 * 2 1 4 4 H 1.09000 * 109.56812 * 29.84355 * 3 2 1 5 5 C 1.53099 * 109.45212 * 269.63982 * 3 2 1 6 6 O 1.42908 * 109.48548 * 297.61159 * 5 3 2 7 7 C 1.42900 * 114.09838 * 298.89103 * 6 5 3 8 8 C 1.53094 * 109.41528 * 61.15930 * 7 6 5 9 9 C 1.53173 * 109.52186 * 150.00057 * 3 2 1 10 10 H 1.09003 * 109.54411 * 182.88325 * 9 3 2 11 11 C 1.53000 * 109.54574 * 303.05850 * 9 3 2 12 12 C 1.50697 * 109.47495 * 184.82310 * 11 9 3 13 13 O 1.21289 * 119.99763 * 359.97438 * 12 11 9 14 14 N 1.34772 * 120.00377 * 180.02562 * 12 11 9 15 15 C 1.46924 * 120.63240 * 179.97438 * 14 12 11 16 16 C 1.53194 * 108.89104 * 126.34354 * 15 14 12 17 17 C 1.53349 * 109.15205 * 54.57758 * 16 15 14 18 18 N 1.46496 * 109.41638 * 178.67413 * 17 16 15 19 19 C 1.46501 * 120.00227 * 60.13030 * 18 17 16 20 20 C 1.36942 * 119.99812 * 240.12330 * 18 17 16 21 21 H 1.07998 * 119.99827 * 22.07092 * 20 18 17 22 22 C 1.38816 * 119.99903 * 202.06382 * 20 18 17 23 23 N 1.31614 * 120.00133 * 12.43694 * 22 20 18 24 24 Si 1.86797 * 119.99699 * 192.43140 * 22 20 18 25 25 H 1.48501 * 109.47560 * 0.02562 * 24 22 20 26 26 H 1.48504 * 109.47085 * 120.00324 * 24 22 20 27 27 H 1.48502 * 109.47410 * 240.00227 * 24 22 20 28 28 C 1.53039 * 109.60879 * 298.71464 * 17 16 15 29 29 C 1.46925 * 120.62807 * 0.02562 * 14 12 11 30 30 H 1.09000 * 109.46775 * 299.99991 * 1 2 3 31 31 H 1.08997 * 109.47241 * 59.99277 * 1 2 3 32 32 H 1.08996 * 109.47420 * 180.02562 * 1 2 3 33 33 H 1.09003 * 109.40728 * 177.63589 * 5 3 2 34 34 H 1.08999 * 109.49517 * 57.64414 * 5 3 2 35 35 H 1.09001 * 109.48098 * 301.17219 * 7 6 5 36 36 H 1.09006 * 109.48034 * 181.13674 * 7 6 5 37 37 H 1.08994 * 109.52459 * 182.48725 * 8 7 6 38 38 H 1.08997 * 109.52515 * 62.29540 * 8 7 6 39 39 H 1.08998 * 109.47121 * 64.81996 * 11 9 3 40 40 H 1.09000 * 109.47129 * 304.82256 * 11 9 3 41 41 H 1.08993 * 109.58752 * 246.20224 * 15 14 12 42 42 H 1.09003 * 109.58578 * 6.48534 * 15 14 12 43 43 H 1.09008 * 109.49557 * 174.66129 * 16 15 14 44 44 H 1.09003 * 109.49667 * 294.75031 * 16 15 14 45 45 H 1.09000 * 109.41508 * 58.75304 * 17 16 15 46 46 H 1.09001 * 109.46842 * 94.29792 * 19 18 17 47 47 H 1.08993 * 109.47266 * 214.30091 * 19 18 17 48 48 H 1.09000 * 109.46857 * 334.29912 * 19 18 17 49 49 H 0.96994 * 119.99913 * 180.02562 * 23 22 20 50 50 H 1.09005 * 109.49418 * 301.42099 * 28 17 16 51 51 H 1.08992 * 109.52409 * 181.34253 * 28 17 16 52 52 H 1.08996 * 109.58749 * 353.37692 * 29 14 12 53 53 H 1.09006 * 109.58600 * 113.65925 * 29 14 12 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 8 1.4291 0.0000 0.0000 3 6 2.0103 1.3054 0.0000 4 1 1.3450 2.0013 0.5111 5 6 2.2260 1.7675 -1.4436 6 8 3.1454 0.8874 -2.0935 7 6 4.4399 0.8463 -1.4895 8 6 4.3134 0.3450 -0.0485 9 6 3.3607 1.2645 0.7218 10 1 3.7807 2.2693 0.7670 11 6 3.1664 0.7267 2.1410 12 6 4.4730 0.7979 2.8885 13 8 5.4624 1.2351 2.3399 14 7 4.5424 0.3746 4.1661 15 6 5.8092 0.4372 4.9077 16 6 5.5799 1.1970 6.2180 17 6 4.4295 0.5368 6.9877 18 7 4.2261 1.2397 8.2568 19 6 3.8800 2.6632 8.2585 20 6 4.3593 0.5660 9.4416 21 1 4.9408 -0.3431 9.4835 22 6 3.7469 1.0516 10.5888 23 7 2.8470 2.0080 10.4999 24 14 4.1998 0.3477 12.2587 25 1 5.2295 -0.7087 12.0879 26 1 4.7391 1.4290 13.1220 27 1 2.9914 -0.2366 12.8940 28 6 3.1475 0.6067 6.1549 29 6 3.3529 -0.1591 4.8435 30 1 -0.3633 0.5138 0.8900 31 1 -0.3633 0.5139 -0.8899 32 1 -0.3634 -1.0276 0.0005 33 1 2.6303 2.7798 -1.4433 34 1 1.2745 1.7562 -1.9751 35 1 4.8731 1.8465 -1.4898 36 1 5.0831 0.1711 -2.0540 37 1 5.2937 0.3548 0.4279 38 1 3.9180 -0.6707 -0.0495 39 1 2.8305 -0.3091 2.0942 40 1 2.4188 1.3281 2.6582 41 1 6.1546 -0.5731 5.1268 42 1 6.5574 0.9575 4.3097 43 1 6.4886 1.1676 6.8194 44 1 5.3224 2.2329 5.9976 45 1 4.6775 -0.5060 7.1858 46 1 2.7969 2.7737 8.3104 47 1 4.3364 3.1470 9.1220 48 1 4.2494 3.1280 7.3444 49 1 2.4194 2.3476 11.3016 50 1 2.9128 1.6483 5.9352 51 1 2.3256 0.1585 6.7130 52 1 2.4796 -0.0300 4.2042 53 1 3.4974 -1.2186 5.0552 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 ZINC000985463091.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 06:11:40 Heat of formation + Delta-G solvation = -105.787130 kcal Electronic energy + Delta-G solvation = -31495.928603 eV Core-core repulsion = 27368.379071 eV Total energy + Delta-G solvation = -4127.549533 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.82 seconds Orbital eigenvalues (eV) -40.59378 -39.58738 -37.55818 -37.20430 -35.09525 -34.33309 -32.25674 -30.97858 -30.72961 -29.86824 -28.72381 -26.85396 -26.02446 -25.04081 -23.81161 -23.58279 -22.67779 -21.90599 -20.29805 -19.65548 -18.41343 -17.26193 -16.84754 -16.75352 -16.59854 -16.05071 -15.75927 -15.67329 -15.13304 -15.08809 -14.95820 -14.17934 -13.97066 -13.90227 -13.69379 -13.57229 -13.33980 -12.95328 -12.88655 -12.64462 -12.46288 -12.30480 -12.24976 -11.76067 -11.59523 -11.57417 -11.54025 -11.18443 -11.01323 -10.90291 -10.85821 -10.80357 -10.53525 -10.39485 -10.26947 -10.22006 -10.14799 -9.87616 -9.67621 -9.55504 -9.27736 -8.58234 -8.43382 -6.77761 -5.74005 -3.19501 2.72691 3.12312 3.35668 3.38969 3.43301 3.44918 3.77985 4.30438 4.44374 4.46621 4.55241 4.66134 4.84499 4.95349 5.05261 5.06766 5.12598 5.14745 5.21077 5.23577 5.26948 5.32945 5.34877 5.43284 5.43805 5.46920 5.48892 5.57393 5.65386 5.70893 5.76892 5.82677 5.90118 6.02526 6.03505 6.15242 6.21722 6.26821 6.38985 6.48968 6.62992 6.78492 6.81349 6.95641 6.97983 7.08042 7.38923 7.56180 7.71133 7.79353 8.28525 8.38091 9.22315 9.86064 10.35059 11.30744 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.023020 B = 0.002310 C = 0.002197 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1216.026788 B =12120.515717 C =12740.122473 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.028 3.972 2 O -0.368 6.368 3 C 0.057 3.943 4 H 0.071 0.929 5 C 0.043 3.957 6 O -0.375 6.375 7 C 0.061 3.939 8 C -0.150 4.150 9 C -0.067 4.067 10 H 0.090 0.910 11 C -0.131 4.131 12 C 0.515 3.485 13 O -0.550 6.550 14 N -0.606 5.606 15 C 0.114 3.886 16 C -0.146 4.146 17 C 0.180 3.820 18 N -0.597 5.597 19 C 0.165 3.835 20 C -0.253 4.253 21 H 0.068 0.932 22 C 0.000 4.000 23 N -0.908 5.908 24 Si 0.904 3.096 25 H -0.278 1.278 26 H -0.290 1.290 27 H -0.291 1.291 28 C -0.145 4.145 29 C 0.108 3.892 30 H 0.042 0.958 31 H 0.039 0.961 32 H 0.086 0.914 33 H 0.058 0.942 34 H 0.092 0.908 35 H 0.049 0.951 36 H 0.092 0.908 37 H 0.093 0.907 38 H 0.073 0.927 39 H 0.100 0.900 40 H 0.090 0.910 41 H 0.063 0.937 42 H 0.085 0.915 43 H 0.072 0.928 44 H 0.060 0.940 45 H 0.062 0.938 46 H 0.027 0.973 47 H 0.042 0.958 48 H -0.003 1.003 49 H 0.251 0.749 50 H 0.059 0.941 51 H 0.076 0.924 52 H 0.077 0.923 53 H 0.068 0.932 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -2.925 -2.046 -22.433 22.716 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 -0.068 4.068 2 O -0.287 6.287 3 C -0.002 4.002 4 H 0.089 0.911 5 C -0.035 4.035 6 O -0.294 6.294 7 C -0.015 4.015 8 C -0.188 4.188 9 C -0.086 4.086 10 H 0.108 0.892 11 C -0.171 4.171 12 C 0.304 3.696 13 O -0.430 6.430 14 N -0.338 5.338 15 C -0.008 4.008 16 C -0.186 4.186 17 C 0.071 3.929 18 N -0.318 5.318 19 C 0.020 3.980 20 C -0.382 4.382 21 H 0.086 0.914 22 C -0.198 4.198 23 N -0.553 5.553 24 Si 0.734 3.266 25 H -0.204 1.204 26 H -0.217 1.217 27 H -0.218 1.218 28 C -0.186 4.186 29 C -0.015 4.015 30 H 0.060 0.940 31 H 0.057 0.943 32 H 0.104 0.896 33 H 0.077 0.923 34 H 0.110 0.890 35 H 0.067 0.933 36 H 0.110 0.890 37 H 0.112 0.888 38 H 0.091 0.909 39 H 0.119 0.881 40 H 0.109 0.891 41 H 0.081 0.919 42 H 0.103 0.897 43 H 0.091 0.909 44 H 0.079 0.921 45 H 0.080 0.920 46 H 0.045 0.955 47 H 0.060 0.940 48 H 0.015 0.985 49 H 0.061 0.939 50 H 0.078 0.922 51 H 0.094 0.906 52 H 0.096 0.904 53 H 0.086 0.914 Dipole moment (debyes) X Y Z Total from point charges -2.426 -2.005 -22.699 22.917 hybrid contribution -0.250 0.135 1.462 1.489 sum -2.677 -1.869 -21.237 21.487 Atomic orbital electron populations 1.22814 0.81385 1.02869 0.99764 1.87985 1.19158 1.26642 1.94918 1.22884 0.95265 0.85851 0.96155 0.91134 1.23018 0.94218 0.93126 0.93109 1.87935 1.22351 1.65413 1.53672 1.22611 0.84464 1.00637 0.93798 1.22278 1.01440 0.99736 0.95311 1.21049 0.93583 1.00980 0.93016 0.89229 1.21654 0.95900 1.04372 0.95162 1.20597 0.90609 0.76956 0.81454 1.90620 1.38074 1.46846 1.67412 1.48192 1.11468 1.62279 1.11902 1.21626 0.85483 1.00638 0.93082 1.22522 1.01138 1.00083 0.94865 1.20332 0.90964 0.95596 0.85970 1.43970 1.81756 1.05849 1.00244 1.20733 0.98463 0.83226 0.95580 1.19273 1.25187 1.07880 0.85891 0.91391 1.25006 0.97001 0.99221 0.98548 1.70079 1.27467 1.30522 1.27264 0.86197 0.77683 0.78302 0.84429 1.20355 1.21684 1.21783 1.22513 1.01445 1.00213 0.94406 1.21874 0.86785 0.98067 0.94822 0.93990 0.94274 0.89578 0.92347 0.88975 0.93308 0.88955 0.88834 0.90856 0.88129 0.89130 0.91872 0.89670 0.90905 0.92115 0.91955 0.95496 0.93954 0.98463 0.93863 0.92225 0.90560 0.90449 0.91391 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 16. 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 0.03 0.20 10.82 101.05 1.09 1.29 16 2 O -0.37 -3.64 9.08 -42.63 -0.39 -4.02 16 3 C 0.06 0.50 2.44 -26.59 -0.06 0.44 16 4 H 0.07 0.52 7.79 -51.93 -0.40 0.11 16 5 C 0.04 0.37 6.48 37.21 0.24 0.61 16 6 O -0.38 -4.18 10.70 -42.63 -0.46 -4.63 16 7 C 0.06 0.61 6.84 37.21 0.25 0.87 16 8 C -0.15 -1.64 4.97 -26.59 -0.13 -1.77 16 9 C -0.07 -0.69 1.75 -90.44 -0.16 -0.85 16 10 H 0.09 0.97 7.96 -51.93 -0.41 0.55 16 11 C -0.13 -1.39 3.28 -27.88 -0.09 -1.48 16 12 C 0.52 7.06 7.44 -10.99 -0.08 6.98 16 13 O -0.55 -8.91 13.40 5.55 0.07 -8.83 16 14 N -0.61 -8.38 2.97 -172.74 -0.51 -8.89 16 15 C 0.11 1.67 6.42 -3.71 -0.02 1.65 16 16 C -0.15 -2.47 5.35 -26.45 -0.14 -2.61 16 17 C 0.18 3.44 2.55 -67.73 -0.17 3.27 16 18 N -0.60 -14.39 2.81 -173.26 -0.49 -14.87 16 19 C 0.16 3.98 8.03 59.85 0.48 4.46 16 20 C -0.25 -6.75 9.60 -15.06 -0.14 -6.90 16 21 H 0.07 1.78 7.81 -52.49 -0.41 1.37 16 22 C 0.00 0.01 5.11 -17.43 -0.09 -0.08 16 23 N -0.91 -26.04 10.63 55.49 0.59 -25.45 16 24 Si 0.90 21.55 29.57 -169.99 -5.03 16.52 16 25 H -0.28 -6.47 7.11 56.52 0.40 -6.07 16 26 H -0.29 -6.99 7.11 56.52 0.40 -6.59 16 27 H -0.29 -6.99 7.11 56.52 0.40 -6.58 16 28 C -0.15 -2.41 5.34 -26.59 -0.14 -2.55 16 29 C 0.11 1.38 6.34 -3.69 -0.02 1.35 16 30 H 0.04 0.26 8.09 -51.93 -0.42 -0.16 16 31 H 0.04 0.24 7.86 -51.93 -0.41 -0.17 16 32 H 0.09 0.53 8.14 -51.93 -0.42 0.11 16 33 H 0.06 0.44 8.14 -51.93 -0.42 0.01 16 34 H 0.09 0.68 7.86 -51.93 -0.41 0.27 16 35 H 0.05 0.45 8.14 -51.93 -0.42 0.03 16 36 H 0.09 0.82 8.14 -51.93 -0.42 0.39 16 37 H 0.09 1.17 6.05 -51.93 -0.31 0.85 16 38 H 0.07 0.86 7.84 -51.93 -0.41 0.45 16 39 H 0.10 1.03 7.57 -51.93 -0.39 0.64 16 40 H 0.09 0.87 7.69 -51.93 -0.40 0.47 16 41 H 0.06 0.86 8.14 -51.93 -0.42 0.43 16 42 H 0.08 1.29 7.00 -51.93 -0.36 0.92 16 43 H 0.07 1.27 8.14 -51.92 -0.42 0.85 16 44 H 0.06 1.10 6.73 -51.93 -0.35 0.75 16 45 H 0.06 1.21 7.86 -51.93 -0.41 0.80 16 46 H 0.03 0.70 7.41 -51.93 -0.39 0.32 16 47 H 0.04 1.12 7.20 -51.93 -0.37 0.74 16 48 H 0.00 -0.07 6.47 -51.93 -0.34 -0.40 16 49 H 0.25 7.00 8.31 -40.82 -0.34 6.66 16 50 H 0.06 1.04 7.72 -51.93 -0.40 0.64 16 51 H 0.08 1.36 8.14 -51.93 -0.42 0.94 16 52 H 0.08 0.82 5.93 -51.93 -0.31 0.51 16 53 H 0.07 0.82 8.14 -51.93 -0.42 0.39 16 LS Contribution 399.53 15.07 6.02 6.02 Total: -1.00 -31.45 399.53 -8.80 -40.25 By element: Atomic # 1 Polarization: 8.66 SS G_CDS: -9.42 Total: -0.76 kcal Atomic # 6 Polarization: 3.87 SS G_CDS: 0.80 Total: 4.68 kcal Atomic # 7 Polarization: -48.80 SS G_CDS: -0.41 Total: -49.21 kcal Atomic # 8 Polarization: -16.72 SS G_CDS: -0.77 Total: -17.49 kcal Atomic # 14 Polarization: 21.55 SS G_CDS: -5.03 Total: 16.52 kcal Total LS contribution 6.02 Total: 6.02 kcal Total: -31.45 -8.80 -40.25 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. ZINC000985463091.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 -65.536 kcal (2) G-P(sol) polarization free energy of solvation -31.451 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -96.987 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.800 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.251 kcal (6) G-S(sol) free energy of system = (1) + (5) -105.787 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.82 seconds