Wall clock time and date at job start Mon Mar 8 2021 05:18:47 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 * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS WATER ******************************************************************************* 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 N 1.46500 * 1 3 3 C 1.34777 * 120.00122 * 2 1 4 4 O 1.21505 * 119.99738 * 180.02562 * 3 2 1 5 5 O 1.34637 * 119.99686 * 359.97438 * 3 2 1 6 6 C 1.45198 * 116.99541 * 179.97438 * 5 3 2 7 7 C 1.53001 * 109.47186 * 60.00345 * 6 5 3 8 8 C 1.53006 * 109.47279 * 180.02562 * 6 5 3 9 9 C 1.53000 * 109.47441 * 300.00228 * 6 5 3 10 10 C 1.46501 * 119.99699 * 180.02562 * 2 1 3 11 11 H 1.09003 * 109.47365 * 119.16781 * 10 2 1 12 12 C 1.53002 * 109.46939 * 239.16573 * 10 2 1 13 13 C 1.53000 * 109.46927 * 60.00186 * 12 10 2 14 14 C 1.52992 * 109.47399 * 60.00013 * 13 12 10 15 15 H 1.09000 * 109.47237 * 60.00085 * 14 13 12 16 16 N 1.46500 * 109.47395 * 179.97438 * 14 13 12 17 17 C 1.39145 * 120.00232 * 204.99820 * 16 14 13 18 18 N 1.32333 * 119.71466 * 359.97438 * 17 16 14 19 19 C 1.32015 * 121.64339 * 179.97438 * 18 17 16 20 20 C 1.37984 * 120.89836 * 0.04338 * 19 18 17 21 21 C 1.50699 * 120.32110 * 180.25478 * 20 19 18 22 22 O 1.42898 * 109.47171 * 119.72416 * 21 20 19 23 23 Si 1.86296 * 109.47547 * 359.71979 * 21 20 19 24 24 C 1.38904 * 119.34938 * 359.97438 * 20 19 18 25 25 C 1.38437 * 118.48464 * 0.02562 * 24 20 19 26 26 F 1.35104 * 120.47121 * 179.97438 * 25 24 20 27 27 C 1.53002 * 109.47070 * 299.99899 * 14 13 12 28 28 C 1.52998 * 109.47500 * 359.16657 * 10 2 1 29 29 H 1.09001 * 109.47140 * 275.90791 * 1 2 3 30 30 H 1.09001 * 109.47053 * 35.91058 * 1 2 3 31 31 H 1.09004 * 109.47105 * 155.91012 * 1 2 3 32 32 H 1.08997 * 109.46744 * 60.00180 * 7 6 5 33 33 H 1.09002 * 109.46879 * 179.97438 * 7 6 5 34 34 H 1.08994 * 109.46889 * 299.99486 * 7 6 5 35 35 H 1.09000 * 109.46980 * 59.99648 * 8 6 5 36 36 H 1.08995 * 109.47283 * 180.02562 * 8 6 5 37 37 H 1.09000 * 109.46853 * 300.00304 * 8 6 5 38 38 H 1.09002 * 109.47089 * 59.99990 * 9 6 5 39 39 H 1.09002 * 109.47417 * 180.02562 * 9 6 5 40 40 H 1.09000 * 109.46869 * 300.00383 * 9 6 5 41 41 H 1.09000 * 109.47168 * 299.99831 * 12 10 2 42 42 H 1.08999 * 109.47136 * 180.02562 * 12 10 2 43 43 H 1.09000 * 109.46857 * 299.99865 * 13 12 10 44 44 H 1.08998 * 109.46762 * 180.02562 * 13 12 10 45 45 H 0.96998 * 119.99415 * 25.00079 * 16 14 13 46 46 H 1.07995 * 119.54788 * 180.02562 * 19 18 17 47 47 H 1.09002 * 109.46951 * 239.72185 * 21 20 19 48 48 H 0.96699 * 114.00234 * 299.99325 * 22 21 20 49 49 H 1.48503 * 110.00284 * 179.97438 * 23 21 20 50 50 H 1.48499 * 109.99969 * 301.32072 * 23 21 20 51 51 H 1.07994 * 120.75483 * 180.02562 * 24 20 19 52 52 H 1.09002 * 109.46749 * 179.97438 * 27 14 13 53 53 H 1.08999 * 109.47136 * 299.99642 * 27 14 13 54 54 H 1.08998 * 109.47351 * 59.99967 * 28 10 2 55 55 H 1.09000 * 109.47500 * 180.02562 * 28 10 2 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 7 1.4650 0.0000 0.0000 3 6 2.1389 1.1672 0.0000 4 8 3.3540 1.1671 -0.0005 5 8 1.4657 2.3332 -0.0005 6 6 2.2565 3.5508 0.0001 7 6 3.1401 3.5858 -1.2485 8 6 1.3246 4.7643 0.0000 9 6 3.1383 3.5858 1.2500 10 6 2.1974 -1.2688 -0.0006 11 1 2.8129 -1.3327 -0.8980 12 6 3.0927 -1.3413 1.2380 13 6 2.2289 -1.2517 2.4976 14 6 1.2348 -2.4145 2.5181 15 1 1.7797 -3.3584 2.5178 16 7 0.4080 -2.3290 3.7246 17 6 -0.1809 -3.4762 4.2472 18 7 0.0091 -4.6415 3.6496 19 6 -0.5308 -5.7536 4.1128 20 6 -1.3195 -5.7403 5.2450 21 6 -1.9248 -7.0184 5.7656 22 8 -1.4538 -7.2625 7.0925 23 14 -1.4308 -8.4347 4.6609 24 6 -1.5453 -4.5381 5.9033 25 6 -0.9663 -3.3880 5.3948 26 9 -1.1597 -2.1972 6.0028 27 6 0.3395 -2.3419 1.2795 28 6 1.2034 -2.4316 0.0199 29 1 -0.3633 0.1058 1.0222 30 1 -0.3633 0.8323 -0.6028 31 1 -0.3633 -0.9382 -0.4195 32 1 2.5119 3.5610 -2.1389 33 1 3.7335 4.5001 -1.2482 34 1 3.8041 2.7214 -1.2480 35 1 0.6954 4.7392 0.8897 36 1 1.9183 5.6784 0.0000 37 1 0.6961 4.7397 -0.8902 38 1 3.8023 2.7213 1.2504 39 1 3.7317 4.5001 1.2506 40 1 2.5088 3.5609 2.1395 41 1 3.8010 -0.5129 1.2234 42 1 3.6380 -2.2851 1.2374 43 1 1.6839 -0.3077 2.4980 44 1 2.8667 -1.3029 3.3800 45 1 0.2712 -1.4726 4.1589 46 1 -0.3531 -6.6864 3.5984 47 1 -3.0110 -6.9279 5.7766 48 1 -0.4934 -7.3542 7.1583 49 1 -2.0209 -9.7012 5.1640 50 1 -1.8872 -8.1780 3.2712 51 1 -2.1584 -4.5016 6.7915 52 1 -0.3685 -3.1706 1.2940 53 1 -0.2055 -1.3980 1.2800 54 1 0.5655 -2.3800 -0.8625 55 1 1.7483 -3.3756 0.0199 There are 72 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 72 No. of singly occupied orbitals= 1 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=WATER s_27_14055834_17656566.mol2 55 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 05:18:47 Heat of formation + Delta-G solvation = -84.318109 kcal Electronic energy + Delta-G solvation = -37534.880237 eV Core-core repulsion = 32682.355415 eV Total energy + Delta-G solvation = -4852.524823 eV No. of doubly occupied orbitals = 72 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 382.210 amu Computer time = 1.47 seconds Orbital eigenvalues (eV) -49.95582 -42.20647 -41.43944 -40.46699 -38.34025 -37.71697 -36.68534 -35.38632 -34.28086 -33.20421 -32.23841 -31.81549 -29.86647 -28.38548 -28.32606 -27.54894 -26.39017 -25.11920 -24.08313 -23.74095 -22.91962 -22.19688 -20.98571 -20.23767 -19.30959 -18.73984 -18.38235 -18.32133 -17.64693 -17.56660 -17.49883 -17.01234 -16.82296 -16.30977 -16.06899 -15.93908 -15.87019 -15.44236 -15.38304 -15.27644 -15.17164 -14.74811 -14.52821 -14.38726 -14.33070 -14.14441 -13.86830 -13.62846 -13.42579 -13.35065 -13.33241 -13.14289 -13.02445 -12.92211 -12.86638 -12.76210 -12.56091 -12.51022 -12.27540 -12.14458 -12.07189 -11.95706 -11.73667 -11.37243 -11.29165 -11.10727 -10.78449 -10.68438 -10.63178 -10.39246 -9.72702 -8.74929 -4.95348 -0.07118 0.11899 1.13807 1.33588 1.67405 1.77056 1.96667 2.01629 2.56056 2.82992 3.03400 3.28929 3.50565 3.60227 3.67709 3.70865 3.73327 3.77991 3.86757 3.89445 3.92833 3.98035 4.03851 4.12361 4.24161 4.33831 4.43949 4.44671 4.46495 4.48551 4.51626 4.56606 4.59012 4.62365 4.67777 4.72689 4.74011 4.80624 4.82745 4.85323 4.88028 4.99707 5.02274 5.04786 5.10403 5.13216 5.14367 5.21656 5.25165 5.28004 5.31797 5.44177 5.47435 5.61771 5.99923 6.18520 6.31952 6.79571 6.95811 7.29934 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.072 3.928 2 N -0.588 5.588 3 C 0.644 3.356 4 O -0.586 6.586 5 O -0.368 6.368 6 C 0.128 3.872 7 C -0.178 4.178 8 C -0.137 4.137 9 C -0.178 4.178 10 C 0.165 3.835 11 H 0.075 0.925 12 C -0.130 4.130 13 C -0.113 4.113 14 C 0.166 3.834 15 H 0.088 0.912 16 N -0.712 5.712 17 C 0.386 3.614 18 N -0.520 5.520 19 C 0.149 3.851 20 C -0.207 4.207 21 C -0.060 4.060 22 O -0.557 6.557 23 Si 0.775 3.225 24 C -0.041 4.041 25 C -0.041 4.041 26 F -0.143 7.143 27 C -0.151 4.151 28 C -0.114 4.114 29 H 0.063 0.937 30 H 0.068 0.932 31 H 0.103 0.897 32 H 0.059 0.941 33 H 0.084 0.916 34 H 0.065 0.935 35 H 0.067 0.933 36 H 0.097 0.903 37 H 0.068 0.932 38 H 0.065 0.935 39 H 0.084 0.916 40 H 0.058 0.942 41 H 0.069 0.931 42 H 0.089 0.911 43 H 0.054 0.946 44 H 0.064 0.936 45 H 0.411 0.589 46 H 0.184 0.816 47 H 0.110 0.890 48 H 0.396 0.604 49 H -0.299 1.299 50 H -0.276 1.276 51 H 0.151 0.849 52 H 0.066 0.934 53 H 0.088 0.912 54 H 0.088 0.912 55 H 0.099 0.901 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -0.099 -1.206 -1.870 2.227 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 -0.069 4.069 2 N -0.328 5.328 3 C 0.399 3.601 4 O -0.477 6.477 5 O -0.283 6.283 6 C 0.092 3.908 7 C -0.235 4.235 8 C -0.194 4.194 9 C -0.235 4.235 10 C 0.063 3.937 11 H 0.093 0.907 12 C -0.169 4.169 13 C -0.151 4.151 14 C 0.062 3.938 15 H 0.106 0.894 16 N -0.343 5.343 17 C 0.148 3.852 18 N -0.237 5.237 19 C -0.009 4.009 20 C -0.212 4.212 21 C -0.170 4.170 22 O -0.365 6.365 23 Si 0.680 3.320 24 C -0.067 4.067 25 C -0.068 4.068 26 F -0.122 7.122 27 C -0.189 4.189 28 C -0.152 4.152 29 H 0.082 0.918 30 H 0.087 0.913 31 H 0.121 0.879 32 H 0.078 0.922 33 H 0.103 0.897 34 H 0.084 0.916 35 H 0.086 0.914 36 H 0.115 0.885 37 H 0.087 0.913 38 H 0.084 0.916 39 H 0.103 0.897 40 H 0.077 0.923 41 H 0.087 0.913 42 H 0.108 0.892 43 H 0.072 0.928 44 H 0.082 0.918 45 H 0.248 0.752 46 H 0.201 0.799 47 H 0.127 0.873 48 H 0.246 0.754 49 H -0.227 1.227 50 H -0.203 1.203 51 H 0.169 0.831 52 H 0.084 0.916 53 H 0.106 0.894 54 H 0.106 0.894 55 H 0.117 0.883 Dipole moment (debyes) X Y Z Total from point charges 0.004 -1.702 -3.161 3.590 hybrid contribution -1.023 1.285 1.407 2.162 sum -1.018 -0.417 -1.754 2.071 Atomic orbital electron populations 1.22241 0.78019 1.04531 1.02109 1.46875 1.07689 1.02752 1.75505 1.18246 0.83916 0.81644 0.76317 1.90864 1.13235 1.87088 1.56538 1.86317 1.41410 1.14123 1.86469 1.22297 0.91351 0.80850 0.96342 1.22454 1.00377 1.04222 0.96490 1.21877 0.99473 0.94558 1.03513 1.22447 1.00365 1.04220 0.96441 1.21131 0.93213 0.80796 0.98518 0.90673 1.21886 0.98079 1.03813 0.93093 1.21609 0.97389 0.97616 0.98475 1.20918 0.90428 0.99403 0.83079 0.89425 1.44753 1.53262 1.06304 1.30004 1.18530 0.89878 0.88592 0.88209 1.67364 1.26444 0.97148 1.32731 1.22713 0.90251 0.95930 0.91957 1.20977 1.04840 0.96278 0.99150 1.25009 1.01117 0.99889 0.91032 1.86475 1.29438 1.94200 1.26374 0.93785 0.89885 0.73615 0.74682 1.21398 0.96055 0.90018 0.99249 1.18177 1.08343 0.82762 0.97477 1.91462 1.94335 1.43849 1.82588 1.22541 0.98677 1.04109 0.93556 1.21786 0.97620 0.97344 0.98423 0.91826 0.91318 0.87855 0.92161 0.89671 0.91643 0.91353 0.88472 0.91283 0.91602 0.89707 0.92250 0.91282 0.89204 0.92754 0.91761 0.75180 0.79933 0.87263 0.75441 1.22670 1.20280 0.83138 0.91573 0.89390 0.89398 0.88293 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 0.07 -0.24 8.24 127.77 1.05 0.81 16 2 N -0.59 -0.57 2.25 -952.95 -2.14 -2.71 16 3 C 0.64 4.20 7.41 129.79 0.96 5.16 16 4 O -0.59 -6.35 9.93 19.82 0.20 -6.15 16 5 O -0.37 -2.07 8.82 -55.46 -0.49 -2.56 16 6 C 0.13 0.39 1.13 -10.79 -0.01 0.38 16 7 C -0.18 -0.60 8.37 71.98 0.60 0.00 16 8 C -0.14 0.23 8.85 71.98 0.64 0.87 16 9 C -0.18 -0.59 8.37 71.98 0.60 0.01 16 10 C 0.16 -0.21 2.94 44.99 0.13 -0.07 16 11 H 0.08 0.03 8.14 -2.39 -0.02 0.01 16 12 C -0.13 0.00 5.23 30.59 0.16 0.16 16 13 C -0.11 0.09 5.23 30.59 0.16 0.25 16 14 C 0.17 -0.31 2.47 44.99 0.11 -0.20 16 15 H 0.09 -0.03 7.54 -2.39 -0.02 -0.05 16 16 N -0.71 -0.06 5.23 -324.29 -1.69 -1.76 16 17 C 0.39 0.97 7.47 133.09 0.99 1.97 16 18 N -0.52 -0.75 9.20 -193.03 -1.78 -2.53 16 19 C 0.15 -0.29 9.84 84.61 0.83 0.55 16 20 C -0.21 0.31 5.40 -19.77 -0.11 0.21 16 21 C -0.06 0.18 2.84 71.24 0.20 0.38 16 22 O -0.56 0.98 12.78 -148.98 -1.90 -0.93 16 23 Si 0.78 -3.91 29.82 68.60 2.05 -1.86 16 24 C -0.04 -0.05 9.75 22.48 0.22 0.17 16 25 C -0.04 -0.15 7.35 22.58 0.17 0.02 16 26 F -0.14 -0.79 16.65 44.97 0.75 -0.05 16 27 C -0.15 0.58 4.85 30.60 0.15 0.73 16 28 C -0.11 0.65 4.91 30.60 0.15 0.80 16 29 H 0.06 -0.23 6.70 -2.39 -0.02 -0.25 16 30 H 0.07 -0.16 7.57 -2.39 -0.02 -0.18 16 31 H 0.10 -0.70 4.95 -2.38 -0.01 -0.71 16 32 H 0.06 0.18 8.14 -2.39 -0.02 0.16 16 33 H 0.08 0.01 8.14 -2.39 -0.02 -0.01 16 34 H 0.06 0.55 5.88 -2.39 -0.01 0.54 16 35 H 0.07 -0.12 8.14 -2.39 -0.02 -0.14 16 36 H 0.10 -0.46 8.14 -2.39 -0.02 -0.48 16 37 H 0.07 -0.13 8.14 -2.39 -0.02 -0.15 16 38 H 0.07 0.54 5.88 -2.39 -0.01 0.53 16 39 H 0.08 0.01 8.14 -2.39 -0.02 -0.01 16 40 H 0.06 0.17 8.14 -2.39 -0.02 0.15 16 41 H 0.07 0.40 6.11 -2.39 -0.01 0.39 16 42 H 0.09 -0.23 8.14 -2.39 -0.02 -0.24 16 43 H 0.05 0.08 7.60 -2.39 -0.02 0.06 16 44 H 0.06 0.02 8.14 -2.39 -0.02 0.00 16 45 H 0.41 -0.23 8.07 -92.71 -0.75 -0.98 16 46 H 0.18 -1.31 4.88 -2.91 -0.01 -1.33 16 47 H 0.11 -0.22 7.96 -2.39 -0.02 -0.24 16 48 H 0.40 -3.80 8.70 -74.06 -0.64 -4.44 16 49 H -0.30 -0.90 7.11 99.48 0.71 -0.19 16 50 H -0.28 0.33 7.11 99.48 0.71 1.04 16 51 H 0.15 0.04 8.06 -2.91 -0.02 0.01 16 52 H 0.07 -0.11 8.14 -2.39 -0.02 -0.13 16 53 H 0.09 -0.35 3.66 -2.39 -0.01 -0.36 16 54 H 0.09 -0.65 6.89 -2.39 -0.02 -0.67 16 55 H 0.10 -0.70 8.14 -2.39 -0.02 -0.72 16 Total: 0.00 -16.33 417.70 1.58 -14.75 By element: Atomic # 1 Polarization: -7.97 SS G_CDS: -0.42 Total: -8.39 kcal Atomic # 6 Polarization: 5.16 SS G_CDS: 7.01 Total: 12.18 kcal Atomic # 7 Polarization: -1.38 SS G_CDS: -5.61 Total: -7.00 kcal Atomic # 8 Polarization: -7.44 SS G_CDS: -2.20 Total: -9.64 kcal Atomic # 9 Polarization: -0.79 SS G_CDS: 0.75 Total: -0.05 kcal Atomic # 14 Polarization: -3.91 SS G_CDS: 2.05 Total: -1.86 kcal Total: -16.33 1.58 -14.75 kcal The number of atoms in the molecule is 55 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_14055834_17656566.mol2 55 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 -69.566 kcal (2) G-P(sol) polarization free energy of solvation -16.331 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -85.897 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy 1.579 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -14.752 kcal (6) G-S(sol) free energy of system = (1) + (5) -84.318 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.47 seconds