Wall clock time and date at job start Mon Mar 8 2021 05:54:17 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 C 1.53001 * 1 3 3 C 1.52994 * 109.47350 * 2 1 4 4 C 1.53005 * 109.46824 * 239.99941 * 2 1 3 5 5 O 1.45199 * 109.47316 * 120.00360 * 2 1 3 6 6 C 1.34227 * 117.00176 * 59.99689 * 5 2 1 7 7 O 1.20826 * 120.00252 * 359.97438 * 6 5 2 8 8 C 1.50702 * 119.99899 * 180.02562 * 6 5 2 9 9 H 1.08996 * 112.85194 * 311.19469 * 8 6 5 10 10 C 1.53785 * 113.61418 * 82.50425 * 8 6 5 11 11 C 1.53779 * 87.07977 * 139.97945 * 10 8 6 12 12 O 1.42903 * 113.68908 * 220.00451 * 11 10 8 13 13 C 1.52996 * 113.61871 * 89.11637 * 11 10 8 14 14 C 1.53113 * 109.52767 * 197.04127 * 13 11 10 15 15 C 1.53042 * 109.28046 * 182.37678 * 14 13 11 16 16 N 1.46844 * 109.52231 * 59.17670 * 15 14 13 17 17 C 1.38612 * 110.99661 * 174.16361 * 16 15 14 18 18 N 1.29678 * 124.94985 * 359.97155 * 17 16 15 19 19 C 1.32131 * 116.86751 * 180.02562 * 18 17 16 20 20 C 1.33330 * 114.57687 * 0.02562 * 19 18 17 21 21 C 1.50697 * 125.95247 * 180.02562 * 20 19 18 22 22 O 1.42897 * 109.47217 * 245.02228 * 21 20 19 23 23 Si 1.86305 * 109.46912 * 5.02181 * 21 20 19 24 24 S 1.70974 * 124.94815 * 180.33061 * 17 16 15 25 25 C 1.46847 * 111.20017 * 298.25884 * 16 15 14 26 26 C 1.53040 * 109.52359 * 61.74172 * 25 16 15 27 27 C 1.53781 * 87.08376 * 334.56334 * 11 10 8 28 28 H 1.09005 * 109.46661 * 299.99724 * 1 2 3 29 29 H 1.08998 * 109.47513 * 59.99785 * 1 2 3 30 30 H 1.08997 * 109.47323 * 180.02562 * 1 2 3 31 31 H 1.08998 * 109.47538 * 180.02562 * 3 2 1 32 32 H 1.09005 * 109.47324 * 300.00422 * 3 2 1 33 33 H 1.08997 * 109.47351 * 59.99969 * 3 2 1 34 34 H 1.08997 * 109.46992 * 299.99985 * 4 2 1 35 35 H 1.09005 * 109.46778 * 60.00234 * 4 2 1 36 36 H 1.08999 * 109.46674 * 180.02562 * 4 2 1 37 37 H 1.09002 * 113.61794 * 25.43098 * 10 8 6 38 38 H 1.08995 * 113.61375 * 254.52615 * 10 8 6 39 39 H 0.96706 * 113.99979 * 48.73632 * 12 11 10 40 40 H 1.09003 * 109.51848 * 317.16986 * 13 11 10 41 41 H 1.08997 * 109.50391 * 62.43198 * 14 13 11 42 42 H 1.09000 * 109.53311 * 302.33437 * 14 13 11 43 43 H 1.08998 * 109.45902 * 299.16032 * 15 14 13 44 44 H 1.09004 * 109.46009 * 179.19192 * 15 14 13 45 45 H 1.07999 * 122.71069 * 179.97438 * 19 18 17 46 46 H 1.09001 * 109.47531 * 125.01972 * 21 20 19 47 47 H 0.96706 * 113.99939 * 59.99490 * 22 21 20 48 48 H 1.48503 * 109.99824 * 180.02562 * 23 21 20 49 49 H 1.48501 * 110.00068 * 301.31994 * 23 21 20 50 50 H 1.08999 * 109.46633 * 181.75940 * 25 16 15 51 51 H 1.09003 * 109.45851 * 301.72898 * 25 16 15 52 52 H 1.09005 * 109.50286 * 180.87997 * 26 25 16 53 53 H 1.09002 * 109.53051 * 60.78505 * 26 25 16 54 54 H 1.09004 * 113.61421 * 139.98180 * 27 11 10 55 55 H 1.08996 * 113.61668 * 270.88775 * 27 11 10 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 1.4424 0.0000 4 6 2.0400 -0.7213 -1.2493 5 8 2.0141 -0.6845 1.1855 6 6 1.6534 -1.9684 1.3378 7 8 0.9559 -2.5026 0.5083 8 6 2.1175 -2.7435 2.5441 9 1 3.1879 -2.6451 2.7243 10 6 1.2559 -2.5085 3.7961 11 6 1.4001 -4.0127 4.0813 12 8 0.2017 -4.6228 4.5649 13 6 2.6270 -4.3616 4.9262 14 6 2.9245 -5.8585 4.8028 15 6 4.1158 -6.2122 5.6960 16 7 3.8030 -5.8703 7.0894 17 6 4.8081 -6.2971 7.9431 18 7 5.8848 -6.9171 7.5717 19 6 6.7391 -7.2520 8.5224 20 6 6.3660 -6.8990 9.7528 21 6 7.1420 -7.1520 11.0196 22 8 6.4087 -8.0485 11.8565 23 14 8.7920 -7.9067 10.5966 24 16 4.8047 -6.0907 9.6404 25 6 3.5601 -4.4300 7.2411 26 6 2.3522 -4.0231 6.3940 27 6 1.6194 -4.1982 2.5706 28 1 -0.3633 0.5138 0.8901 29 1 -0.3634 0.5138 -0.8899 30 1 -0.3634 -1.0276 0.0005 31 1 3.1300 1.4425 -0.0005 32 1 1.6767 1.9563 -0.8900 33 1 1.6768 1.9563 0.8899 34 1 1.6766 -1.7489 -1.2492 35 1 1.6766 -0.2074 -2.1393 36 1 3.1299 -0.7217 -1.2490 37 1 0.2340 -2.2025 3.5719 38 1 1.7344 -1.8747 4.5427 39 1 -0.5848 -4.4133 4.0426 40 1 3.4856 -3.7893 4.5750 41 1 3.1628 -6.0979 3.7665 42 1 2.0516 -6.4307 5.1169 43 1 4.9919 -5.6505 5.3720 44 1 4.3212 -7.2801 5.6213 45 1 7.6644 -7.7706 8.3194 46 1 7.2975 -6.2096 11.5449 47 1 6.2334 -8.9094 11.4523 48 1 9.5669 -8.1617 11.8376 49 1 8.5940 -9.1763 9.8522 50 1 3.3619 -4.2034 8.2887 51 1 4.4389 -3.8767 6.9099 52 1 2.1817 -2.9512 6.4946 53 1 1.4697 -4.5654 6.7335 54 1 2.3913 -4.9285 2.3278 55 1 0.6969 -4.3541 2.0113 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) Si: (AM1): M.J.S.DEWAR, C. JIE, ORGANOMETALLICS, 6, 1486-1490 (1987). S: (AM1): M.J.S. DEWAR, Y.-C. YUAN, INORGANIC CHEM., 29, 589 (1990) 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_16517482_15704118.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 05:54:17 Heat of formation + Delta-G solvation = -83.461059 kcal Electronic energy + Delta-G solvation = -35937.103765 eV Core-core repulsion = 31261.739907 eV Total energy + Delta-G solvation = -4675.363858 eV No. of doubly occupied orbitals = 72 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 397.180 amu Computer time = 1.71 seconds Orbital eigenvalues (eV) -42.37848 -41.51216 -40.81170 -39.30024 -38.05236 -37.81757 -35.71171 -35.03198 -34.50405 -32.14116 -31.51378 -28.44085 -28.35817 -28.27568 -27.05528 -26.75769 -25.57175 -24.45122 -23.98000 -22.72924 -21.47369 -20.87598 -20.47024 -20.07256 -19.71939 -18.58245 -17.83482 -17.70178 -17.59644 -17.26273 -17.03056 -16.59907 -16.41862 -16.10724 -15.82380 -15.67740 -15.48261 -15.28714 -15.19616 -15.03937 -14.86656 -14.60246 -14.39194 -14.38541 -14.10487 -13.88066 -13.63664 -13.42619 -13.21673 -13.19339 -13.05334 -12.99321 -12.91572 -12.89966 -12.57055 -12.47219 -12.28902 -12.22460 -12.15199 -11.99946 -11.94359 -11.79832 -11.59912 -11.43939 -11.24507 -11.02308 -10.86764 -10.72834 -10.67690 -10.56041 -10.26681 -9.17590 -4.93215 -0.37292 0.04760 0.64792 1.12728 1.41617 1.61011 1.65593 1.67318 1.95952 2.47063 3.17167 3.22027 3.30966 3.31017 3.40570 3.45193 3.51142 3.67533 3.72812 3.74316 3.84797 3.86343 3.92351 4.01434 4.10239 4.17266 4.28742 4.33037 4.39198 4.49461 4.52691 4.54198 4.54700 4.56176 4.61756 4.63220 4.70104 4.70415 4.76451 4.77386 4.82629 4.82945 4.84028 4.91803 4.92471 4.98174 5.07650 5.11966 5.19049 5.23604 5.26633 5.29129 5.45585 5.53490 5.57467 5.76699 6.38007 6.67053 6.77315 6.82308 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.180 4.180 2 C 0.107 3.893 3 C -0.139 4.139 4 C -0.181 4.181 5 O -0.354 6.354 6 C 0.471 3.529 7 O -0.526 6.526 8 C -0.108 4.108 9 H 0.144 0.856 10 C -0.143 4.143 11 C 0.136 3.864 12 O -0.559 6.559 13 C -0.057 4.057 14 C -0.107 4.107 15 C 0.074 3.926 16 N -0.455 5.455 17 C 0.216 3.784 18 N -0.538 5.538 19 C 0.064 3.936 20 C -0.281 4.281 21 C -0.046 4.046 22 O -0.547 6.547 23 Si 0.788 3.212 24 S 0.168 5.832 25 C 0.054 3.946 26 C -0.102 4.102 27 C -0.149 4.149 28 H 0.064 0.936 29 H 0.084 0.916 30 H 0.062 0.938 31 H 0.069 0.931 32 H 0.093 0.907 33 H 0.070 0.930 34 H 0.062 0.938 35 H 0.085 0.915 36 H 0.064 0.936 37 H 0.089 0.911 38 H 0.102 0.898 39 H 0.391 0.609 40 H 0.103 0.897 41 H 0.086 0.914 42 H 0.065 0.935 43 H 0.056 0.944 44 H 0.073 0.927 45 H 0.192 0.808 46 H 0.129 0.871 47 H 0.387 0.613 48 H -0.292 1.292 49 H -0.280 1.280 50 H 0.087 0.913 51 H 0.062 0.938 52 H 0.095 0.905 53 H 0.071 0.929 54 H 0.089 0.911 55 H 0.090 0.910 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 2.004 5.726 -1.420 6.230 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 -0.237 4.237 2 C 0.071 3.929 3 C -0.196 4.196 4 C -0.238 4.238 5 O -0.272 6.272 6 C 0.316 3.684 7 O -0.416 6.416 8 C -0.127 4.127 9 H 0.162 0.838 10 C -0.181 4.181 11 C 0.095 3.905 12 O -0.366 6.366 13 C -0.076 4.076 14 C -0.145 4.145 15 C -0.055 4.055 16 N -0.176 5.176 17 C -0.153 4.153 18 N -0.259 5.259 19 C -0.088 4.088 20 C -0.404 4.404 21 C -0.156 4.156 22 O -0.355 6.355 23 Si 0.690 3.310 24 S 0.421 5.579 25 C -0.072 4.072 26 C -0.140 4.140 27 C -0.187 4.187 28 H 0.084 0.916 29 H 0.103 0.897 30 H 0.081 0.919 31 H 0.088 0.912 32 H 0.112 0.888 33 H 0.089 0.911 34 H 0.081 0.919 35 H 0.103 0.897 36 H 0.083 0.917 37 H 0.108 0.892 38 H 0.121 0.879 39 H 0.241 0.759 40 H 0.121 0.879 41 H 0.104 0.896 42 H 0.084 0.916 43 H 0.075 0.925 44 H 0.092 0.908 45 H 0.209 0.791 46 H 0.147 0.853 47 H 0.237 0.763 48 H -0.220 1.220 49 H -0.206 1.206 50 H 0.106 0.894 51 H 0.081 0.919 52 H 0.114 0.886 53 H 0.089 0.911 54 H 0.108 0.892 55 H 0.108 0.892 Dipole moment (debyes) X Y Z Total from point charges 1.594 5.339 -0.515 5.596 hybrid contribution -0.226 -1.006 -0.961 1.409 sum 1.368 4.333 -1.476 4.778 Atomic orbital electron populations 1.22453 0.94005 1.03538 1.03689 1.22425 0.94529 0.93300 0.82613 1.21876 1.02424 0.91211 1.04067 1.22463 1.01822 1.02034 0.97479 1.86566 1.69621 1.25422 1.45552 1.23859 0.76731 0.80595 0.87246 1.90589 1.36433 1.70461 1.44072 1.22513 1.03639 0.95409 0.91141 0.83788 1.23741 1.00496 0.98591 0.95261 1.22293 0.86510 0.90637 0.91066 1.86430 1.17950 1.74210 1.57997 1.21055 0.94926 0.96767 0.94832 1.21623 0.97453 0.95868 0.99513 1.22044 0.97670 1.01878 0.83862 1.59065 1.33734 1.17549 1.07265 1.25385 0.92031 1.00619 0.97217 1.66874 1.02507 1.19432 1.37093 1.21750 0.99981 1.00366 0.86698 1.26369 1.00804 1.12503 1.00695 1.24755 1.03301 0.99010 0.88527 1.86591 1.75828 1.29011 1.44100 0.93821 0.74421 0.82303 0.80421 1.84064 1.18010 1.54889 1.00907 1.22538 0.99726 0.82685 1.02232 1.21533 0.96833 1.02594 0.93015 1.23815 1.03325 0.94060 0.97472 0.91648 0.89716 0.91866 0.91211 0.88839 0.91145 0.91919 0.89659 0.91727 0.89215 0.87928 0.75943 0.87938 0.89572 0.91593 0.92530 0.90839 0.79114 0.85294 0.76332 1.21967 1.20589 0.89441 0.91942 0.88639 0.91069 0.89201 0.89158 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 -0.18 -0.20 8.37 71.98 0.60 0.40 16 2 C 0.11 0.11 1.13 -10.79 -0.01 0.10 16 3 C -0.14 0.43 8.85 71.98 0.64 1.07 16 4 C -0.18 -0.28 8.37 71.98 0.60 0.32 16 5 O -0.35 -0.95 9.89 -51.39 -0.51 -1.46 16 6 C 0.47 1.19 6.79 71.24 0.48 1.68 16 7 O -0.53 -3.98 11.40 21.96 0.25 -3.73 16 8 C -0.11 0.42 3.91 -11.01 -0.04 0.38 16 9 H 0.14 -1.09 7.61 -2.39 -0.02 -1.11 16 10 C -0.14 0.84 6.91 31.12 0.22 1.05 16 11 C 0.14 -0.65 0.93 -10.27 -0.01 -0.66 16 12 O -0.56 1.08 12.51 -148.98 -1.86 -0.79 16 13 C -0.06 0.30 1.74 -10.72 -0.02 0.28 16 14 C -0.11 0.22 5.14 30.65 0.16 0.38 16 15 C 0.07 0.06 4.83 86.33 0.42 0.48 16 16 N -0.46 -0.97 4.72 -708.88 -3.35 -4.32 16 17 C 0.22 0.95 6.72 179.32 1.21 2.16 16 18 N -0.54 -3.13 9.45 -202.02 -1.91 -5.04 16 19 C 0.06 0.14 10.07 83.54 0.84 0.98 16 20 C -0.28 -0.37 5.92 24.57 0.15 -0.23 16 21 C -0.05 0.04 3.08 71.23 0.22 0.26 16 22 O -0.55 -1.41 12.88 -148.98 -1.92 -3.33 16 23 Si 0.79 -2.49 30.50 68.60 2.09 -0.40 16 24 S 0.17 0.42 22.27 -56.49 -1.26 -0.84 16 25 C 0.05 -0.14 5.33 86.33 0.46 0.32 16 26 C -0.10 0.43 5.18 30.65 0.16 0.59 16 27 C -0.15 0.50 6.61 31.12 0.21 0.70 16 28 H 0.06 0.01 8.14 -2.38 -0.02 -0.01 16 29 H 0.08 -0.13 8.14 -2.39 -0.02 -0.15 16 30 H 0.06 0.35 5.89 -2.39 -0.01 0.33 16 31 H 0.07 -0.23 8.14 -2.39 -0.02 -0.25 16 32 H 0.09 -0.54 8.14 -2.38 -0.02 -0.56 16 33 H 0.07 -0.24 8.14 -2.39 -0.02 -0.26 16 34 H 0.06 0.38 5.89 -2.39 -0.01 0.37 16 35 H 0.08 -0.11 8.14 -2.38 -0.02 -0.13 16 36 H 0.06 0.06 8.14 -2.39 -0.02 0.04 16 37 H 0.09 -0.44 8.09 -2.39 -0.02 -0.46 16 38 H 0.10 -0.84 7.63 -2.39 -0.02 -0.86 16 39 H 0.39 -2.75 9.01 -74.05 -0.67 -3.42 16 40 H 0.10 -0.83 7.32 -2.39 -0.02 -0.85 16 41 H 0.09 -0.34 6.83 -2.39 -0.02 -0.36 16 42 H 0.07 0.14 7.95 -2.39 -0.02 0.12 16 43 H 0.06 0.02 8.14 -2.39 -0.02 0.00 16 44 H 0.07 0.31 7.87 -2.38 -0.02 0.29 16 45 H 0.19 -0.44 5.87 -2.91 -0.02 -0.45 16 46 H 0.13 -0.36 7.96 -2.39 -0.02 -0.38 16 47 H 0.39 -1.00 8.70 -74.05 -0.64 -1.65 16 48 H -0.29 -1.10 7.11 99.48 0.71 -0.39 16 49 H -0.28 -0.24 7.11 99.48 0.71 0.47 16 50 H 0.09 -0.26 7.34 -2.39 -0.02 -0.27 16 51 H 0.06 -0.24 8.14 -2.39 -0.02 -0.26 16 52 H 0.10 -0.71 7.65 -2.38 -0.02 -0.73 16 53 H 0.07 0.01 7.64 -2.39 -0.02 -0.01 16 54 H 0.09 -0.36 6.77 -2.38 -0.02 -0.38 16 55 H 0.09 -0.03 7.43 -2.39 -0.02 -0.05 16 Total: 0.00 -18.46 434.46 -2.54 -21.00 By element: Atomic # 1 Polarization: -11.02 SS G_CDS: -0.35 Total: -11.37 kcal Atomic # 6 Polarization: 3.99 SS G_CDS: 6.27 Total: 10.26 kcal Atomic # 7 Polarization: -4.10 SS G_CDS: -5.26 Total: -9.36 kcal Atomic # 8 Polarization: -5.27 SS G_CDS: -4.04 Total: -9.31 kcal Atomic # 14 Polarization: -2.49 SS G_CDS: 2.09 Total: -0.40 kcal Atomic # 16 Polarization: 0.42 SS G_CDS: -1.26 Total: -0.84 kcal Total: -18.46 -2.54 -21.00 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_16517482_15704118.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 -62.457 kcal (2) G-P(sol) polarization free energy of solvation -18.459 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -80.916 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -2.545 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -21.004 kcal (6) G-S(sol) free energy of system = (1) + (5) -83.461 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.71 seconds