Wall clock time and date at job start Sat Apr 11 2020 06:10:12 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 1.53002 * 1 3 3 N 1.46501 * 109.47013 * 2 1 4 4 C 1.46505 * 119.99962 * 269.99844 * 3 2 1 5 5 C 1.50703 * 109.46890 * 270.00027 * 4 3 2 6 6 H 1.08001 * 120.00262 * 0.02562 * 5 4 3 7 7 C 1.37880 * 119.99540 * 180.02562 * 5 4 3 8 8 N 1.31513 * 120.00032 * 359.97438 * 7 5 4 9 9 Si 1.86802 * 119.99817 * 180.02562 * 7 5 4 10 10 H 1.48506 * 109.46973 * 0.02562 * 9 7 5 11 11 H 1.48503 * 109.47299 * 119.99712 * 9 7 5 12 12 H 1.48493 * 109.46983 * 239.99855 * 9 7 5 13 13 C 1.34774 * 119.99819 * 90.00510 * 3 2 1 14 14 O 1.21283 * 119.99721 * 180.02562 * 13 3 2 15 15 C 1.50693 * 120.00270 * 359.97438 * 13 3 2 16 16 N 1.46903 * 109.47404 * 180.02562 * 15 13 3 17 17 C 1.46847 * 110.99904 * 293.95826 * 16 15 13 18 18 C 1.53036 * 109.52272 * 174.16031 * 17 16 15 19 19 C 1.53121 * 109.28021 * 59.17448 * 18 17 16 20 20 C 1.53119 * 109.16297 * 302.34812 * 19 18 17 21 21 H 1.09000 * 109.50078 * 297.67530 * 20 19 18 22 22 C 1.53000 * 109.50328 * 177.59381 * 20 19 18 23 23 C 1.52999 * 109.47278 * 65.07911 * 22 20 19 24 24 C 1.50698 * 109.47248 * 179.97438 * 23 22 20 25 25 O 1.20822 * 119.99804 * 0.02562 * 24 23 22 26 26 O 1.34231 * 120.00053 * 180.02562 * 24 23 22 27 27 C 1.45198 * 116.99983 * 180.02562 * 26 24 23 28 28 C 1.46850 * 110.99693 * 169.70324 * 16 15 13 29 29 H 1.08998 * 109.46896 * 179.97438 * 1 2 3 30 30 H 1.09004 * 109.47120 * 300.00082 * 1 2 3 31 31 H 1.09005 * 109.46684 * 59.99666 * 1 2 3 32 32 H 1.09004 * 109.47120 * 239.99918 * 2 1 3 33 33 H 1.09005 * 109.47119 * 120.00021 * 2 1 3 34 34 H 1.08992 * 109.47026 * 30.00007 * 4 3 2 35 35 H 1.09001 * 109.46583 * 150.00336 * 4 3 2 36 36 H 0.97000 * 119.99903 * 179.97438 * 8 7 5 37 37 H 1.08997 * 109.47272 * 60.00309 * 15 13 3 38 38 H 1.08999 * 109.47261 * 300.00773 * 15 13 3 39 39 H 1.08995 * 109.46395 * 54.14148 * 17 16 15 40 40 H 1.09005 * 109.45727 * 294.17187 * 17 16 15 41 41 H 1.09007 * 109.50596 * 299.23765 * 18 17 16 42 42 H 1.08996 * 109.50704 * 179.11565 * 18 17 16 43 43 H 1.09000 * 109.52344 * 182.44380 * 19 18 17 44 44 H 1.08998 * 109.52223 * 62.25529 * 19 18 17 45 45 H 1.08998 * 109.47230 * 305.07538 * 22 20 19 46 46 H 1.09004 * 109.46598 * 185.07812 * 22 20 19 47 47 H 1.09008 * 109.46866 * 59.99380 * 23 22 20 48 48 H 1.09001 * 109.47046 * 300.00263 * 23 22 20 49 49 H 1.09002 * 109.47379 * 59.99613 * 27 26 24 50 50 H 1.09001 * 109.46782 * 299.99696 * 27 26 24 51 51 H 1.09004 * 109.47085 * 179.97438 * 27 26 24 52 52 H 1.09000 * 109.43122 * 65.80710 * 28 16 15 53 53 H 1.09000 * 109.49472 * 305.83687 * 28 16 15 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 7 2.0183 1.3812 0.0000 4 6 2.2625 2.0719 -1.2688 5 6 3.6859 1.8350 -1.7037 6 1 4.3427 1.2302 -1.0961 7 6 4.1494 2.3905 -2.8774 8 7 3.3494 3.1266 -3.6176 9 14 5.9135 2.0964 -3.4170 10 1 6.6005 1.2394 -2.4176 11 1 5.9206 1.4182 -4.7381 12 1 6.6216 3.3972 -3.5246 13 6 2.2430 2.0165 1.1672 14 8 2.6468 3.1601 1.1672 15 6 1.9915 1.3063 2.4723 16 7 2.3093 2.2064 3.5889 17 6 3.7454 2.5102 3.6276 18 6 4.0173 3.5598 4.7076 19 6 3.5536 3.0213 6.0640 20 6 2.0662 2.6673 5.9824 21 1 1.4893 3.5670 5.7683 22 6 1.6088 2.0724 7.3157 23 6 1.7101 3.1363 8.4105 24 6 1.2590 2.5505 9.7237 25 8 0.8945 1.3999 9.7783 26 8 1.2623 3.3069 10.8325 27 6 0.8155 2.6766 12.0618 28 6 1.8500 1.6439 4.8653 29 1 -0.3633 -1.0277 -0.0005 30 1 -0.3633 0.5139 0.8900 31 1 -0.3633 0.5139 -0.8900 32 1 1.8934 -0.5139 -0.8900 33 1 1.8934 -0.5139 0.8900 34 1 1.5818 1.6877 -2.0284 35 1 2.0956 3.1411 -1.1383 36 1 3.6757 3.5177 -4.4431 37 1 2.6213 0.4186 2.5302 38 1 0.9434 1.0124 2.5299 39 1 4.0613 2.8961 2.6584 40 1 4.3027 1.6016 3.8557 41 1 3.4711 4.4734 4.4729 42 1 5.0853 3.7735 4.7468 43 1 3.7055 3.7824 6.8293 44 1 4.1269 2.1295 6.3171 45 1 2.2445 1.2250 7.5726 46 1 0.5750 1.7378 7.2287 47 1 1.0744 3.9837 8.1535 48 1 2.7438 3.4709 8.4974 49 1 1.4565 1.8241 12.2869 50 1 -0.2131 2.3362 11.9425 51 1 0.8681 3.3960 12.8790 52 1 2.4157 0.7391 5.0872 53 1 0.7897 1.4012 4.7953 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 ZINC000880038955.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 06:10:12 Heat of formation + Delta-G solvation = -131.805877 kcal Electronic energy + Delta-G solvation = -30270.270669 eV Core-core repulsion = 26141.592879 eV Total energy + Delta-G solvation = -4128.677790 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.71 seconds Orbital eigenvalues (eV) -40.84233 -39.69863 -38.42605 -36.94751 -35.39911 -34.76940 -32.85902 -32.40081 -30.43041 -30.04561 -28.36192 -27.88250 -26.26658 -24.97697 -23.38918 -22.96129 -22.27621 -21.67412 -20.60678 -19.74654 -18.26147 -17.88506 -17.00511 -16.91012 -16.55486 -16.30592 -15.78530 -15.29592 -15.04865 -14.99863 -14.40918 -14.27193 -14.11254 -13.90305 -13.79701 -13.55359 -13.31020 -13.00880 -12.80080 -12.69192 -12.57350 -12.47565 -12.17682 -12.02537 -11.77525 -11.68234 -11.47556 -11.34073 -11.20283 -11.14547 -10.98622 -10.87049 -10.81322 -10.74681 -10.63517 -10.53596 -10.32728 -10.23442 -10.06904 -9.58332 -8.79988 -8.42052 -8.05552 -7.59377 -6.02465 -4.06995 1.85391 2.34604 3.30073 3.37427 3.40667 3.51148 3.68089 4.23052 4.32647 4.46483 4.50160 4.59018 4.69224 4.76069 4.82481 4.86740 4.96632 5.10481 5.11245 5.18984 5.30560 5.31138 5.32363 5.39376 5.46021 5.52820 5.53890 5.58013 5.58625 5.67675 5.69936 5.77686 5.84997 5.88778 5.95606 6.02358 6.06172 6.07435 6.18907 6.25750 6.40296 6.47960 6.51078 7.02838 7.21495 7.29034 7.38140 7.49942 7.61023 7.94824 8.26547 8.49687 8.93797 9.19141 9.58255 11.05465 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.021203 B = 0.002010 C = 0.001895 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1320.242137 B =13923.990603 C =14774.945014 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.169 4.169 2 C 0.107 3.893 3 N -0.600 5.600 4 C 0.247 3.753 5 C -0.524 4.524 6 H 0.056 0.944 7 C 0.060 3.940 8 N -0.894 5.894 9 Si 0.897 3.103 10 H -0.274 1.274 11 H -0.284 1.284 12 H -0.283 1.283 13 C 0.507 3.493 14 O -0.524 6.524 15 C 0.038 3.962 16 N -0.519 5.519 17 C 0.049 3.951 18 C -0.113 4.113 19 C -0.119 4.119 20 C -0.083 4.083 21 H 0.084 0.916 22 C -0.102 4.102 23 C -0.114 4.114 24 C 0.459 3.541 25 O -0.508 6.508 26 O -0.363 6.363 27 C 0.035 3.965 28 C 0.063 3.937 29 H 0.058 0.942 30 H 0.050 0.950 31 H 0.061 0.939 32 H 0.081 0.919 33 H 0.062 0.938 34 H 0.031 0.969 35 H 0.043 0.957 36 H 0.262 0.738 37 H 0.054 0.946 38 H 0.095 0.905 39 H 0.101 0.899 40 H 0.022 0.978 41 H 0.073 0.927 42 H 0.064 0.936 43 H 0.063 0.937 44 H 0.058 0.942 45 H 0.071 0.929 46 H 0.073 0.927 47 H 0.108 0.892 48 H 0.108 0.892 49 H 0.062 0.938 50 H 0.062 0.938 51 H 0.101 0.899 52 H 0.031 0.969 53 H 0.073 0.927 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -5.208 -3.601 26.151 26.906 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 -0.227 4.227 2 C -0.018 4.018 3 N -0.333 5.333 4 C 0.128 3.872 5 C -0.563 4.563 6 H 0.075 0.925 7 C -0.141 4.141 8 N -0.533 5.533 9 Si 0.724 3.276 10 H -0.199 1.199 11 H -0.210 1.210 12 H -0.209 1.209 13 C 0.293 3.707 14 O -0.400 6.400 15 C -0.093 4.093 16 N -0.243 5.243 17 C -0.078 4.078 18 C -0.151 4.151 19 C -0.156 4.156 20 C -0.102 4.102 21 H 0.103 0.897 22 C -0.140 4.140 23 C -0.151 4.151 24 C 0.302 3.698 25 O -0.396 6.396 26 O -0.279 6.279 27 C -0.059 4.059 28 C -0.065 4.065 29 H 0.077 0.923 30 H 0.070 0.930 31 H 0.080 0.920 32 H 0.100 0.900 33 H 0.080 0.920 34 H 0.049 0.951 35 H 0.061 0.939 36 H 0.072 0.928 37 H 0.072 0.928 38 H 0.113 0.887 39 H 0.119 0.881 40 H 0.041 0.959 41 H 0.092 0.908 42 H 0.083 0.917 43 H 0.082 0.918 44 H 0.077 0.923 45 H 0.090 0.910 46 H 0.092 0.908 47 H 0.126 0.874 48 H 0.127 0.873 49 H 0.081 0.919 50 H 0.081 0.919 51 H 0.119 0.881 52 H 0.049 0.951 53 H 0.092 0.908 Dipole moment (debyes) X Y Z Total from point charges -5.362 -2.796 25.925 26.621 hybrid contribution 1.254 -1.207 -0.124 1.745 sum -4.108 -4.003 25.801 26.430 Atomic orbital electron populations 1.22224 0.96832 1.01312 1.02370 1.21396 0.93495 0.84386 1.02486 1.48263 1.64166 1.13148 1.07716 1.19241 0.96108 0.93677 0.78145 1.21477 0.96983 1.31660 1.06180 0.92539 1.24935 0.97763 0.94996 0.96444 1.69944 1.35515 1.33526 1.14344 0.86467 0.84774 0.78022 0.78287 1.19877 1.21015 1.20892 1.20124 0.78828 0.87087 0.84706 1.90633 1.44865 1.17696 1.86776 1.22047 1.02137 0.94225 0.90935 1.61516 1.17484 1.43821 1.01507 1.22286 0.86629 0.97145 1.01736 1.21533 1.00671 0.99371 0.93524 1.21738 0.95329 1.00726 0.97833 1.21178 0.96948 0.99351 0.92692 0.89732 1.21451 1.03040 0.97101 0.92448 1.21507 1.04557 1.00933 0.88149 1.24010 0.74524 0.84876 0.86342 1.90677 1.43823 1.18719 1.86349 1.86522 1.78335 1.45000 1.18080 1.23263 1.00214 0.99127 0.83297 1.22082 1.00275 0.95245 0.88938 0.92275 0.93046 0.92017 0.90041 0.92006 0.95140 0.93874 0.92822 0.92766 0.88685 0.88094 0.95932 0.90780 0.91714 0.91843 0.92340 0.91029 0.90796 0.87368 0.87347 0.91920 0.91883 0.88102 0.95071 0.90812 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 -0.17 -2.26 10.24 37.16 0.38 -1.88 16 2 C 0.11 1.70 5.93 -4.04 -0.02 1.68 16 3 N -0.60 -12.60 2.46 -175.05 -0.43 -13.03 16 4 C 0.25 6.46 5.16 -5.19 -0.03 6.43 16 5 C -0.52 -14.83 9.39 -34.44 -0.32 -15.16 16 6 H 0.06 1.60 7.81 -52.49 -0.41 1.19 16 7 C 0.06 1.73 5.46 -17.82 -0.10 1.63 16 8 N -0.89 -26.62 13.29 55.43 0.74 -25.88 16 9 Si 0.90 21.89 29.54 -169.99 -5.02 16.87 16 10 H -0.27 -6.60 7.11 56.52 0.40 -6.19 16 11 H -0.28 -6.77 7.11 56.52 0.40 -6.37 16 12 H -0.28 -6.91 7.11 56.52 0.40 -6.51 16 13 C 0.51 10.48 7.35 -10.99 -0.08 10.40 16 14 O -0.52 -13.02 13.93 5.56 0.08 -12.94 16 15 C 0.04 0.58 4.00 -4.98 -0.02 0.56 16 16 N -0.52 -7.65 4.39 -236.11 -1.04 -8.68 16 17 C 0.05 0.75 5.11 -3.83 -0.02 0.73 16 18 C -0.11 -1.38 6.09 -26.65 -0.16 -1.54 16 19 C -0.12 -1.11 4.98 -26.61 -0.13 -1.24 16 20 C -0.08 -0.77 2.35 -90.54 -0.21 -0.98 16 21 H 0.08 0.83 8.14 -51.93 -0.42 0.41 16 22 C -0.10 -0.82 3.98 -26.73 -0.11 -0.93 16 23 C -0.11 -0.77 5.57 -27.88 -0.16 -0.93 16 24 C 0.46 4.15 7.96 36.00 0.29 4.44 16 25 O -0.51 -6.05 15.73 -18.75 -0.29 -6.34 16 26 O -0.36 -2.99 10.57 -39.26 -0.41 -3.40 16 27 C 0.03 0.20 10.56 101.05 1.07 1.27 16 28 C 0.06 0.70 4.75 -3.83 -0.02 0.68 16 29 H 0.06 0.63 8.14 -51.93 -0.42 0.21 16 30 H 0.05 0.65 7.22 -51.93 -0.37 0.28 16 31 H 0.06 0.92 8.14 -51.93 -0.42 0.50 16 32 H 0.08 1.36 8.07 -51.93 -0.42 0.94 16 33 H 0.06 0.83 6.44 -51.93 -0.33 0.49 16 34 H 0.03 0.81 8.07 -51.93 -0.42 0.39 16 35 H 0.04 1.28 7.42 -51.93 -0.39 0.89 16 36 H 0.26 7.36 8.31 -40.82 -0.34 7.02 16 37 H 0.05 0.77 7.38 -51.93 -0.38 0.38 16 38 H 0.10 1.25 7.02 -51.93 -0.36 0.89 16 39 H 0.10 1.93 5.80 -51.93 -0.30 1.63 16 40 H 0.02 0.32 8.14 -51.93 -0.42 -0.10 16 41 H 0.07 0.99 8.14 -51.93 -0.42 0.56 16 42 H 0.06 0.73 8.14 -51.93 -0.42 0.30 16 43 H 0.06 0.48 6.70 -51.93 -0.35 0.13 16 44 H 0.06 0.54 8.14 -51.93 -0.42 0.12 16 45 H 0.07 0.62 8.10 -51.93 -0.42 0.20 16 46 H 0.07 0.63 8.10 -51.93 -0.42 0.21 16 47 H 0.11 0.59 8.14 -51.92 -0.42 0.17 16 48 H 0.11 0.60 6.63 -51.93 -0.34 0.25 16 49 H 0.06 0.36 8.13 -51.93 -0.42 -0.06 16 50 H 0.06 0.36 8.13 -51.93 -0.42 -0.06 16 51 H 0.10 0.31 8.14 -51.93 -0.42 -0.11 16 52 H 0.03 0.34 8.14 -51.93 -0.42 -0.08 16 53 H 0.07 0.76 8.01 -51.93 -0.42 0.35 16 LS Contribution 418.85 15.07 6.31 6.31 Total: -1.00 -34.65 418.85 -9.27 -43.92 By element: Atomic # 1 Polarization: 7.57 SS G_CDS: -9.55 Total: -1.98 kcal Atomic # 6 Polarization: 4.80 SS G_CDS: 0.35 Total: 5.16 kcal Atomic # 7 Polarization: -46.86 SS G_CDS: -0.73 Total: -47.59 kcal Atomic # 8 Polarization: -22.06 SS G_CDS: -0.63 Total: -22.69 kcal Atomic # 14 Polarization: 21.89 SS G_CDS: -5.02 Total: 16.87 kcal Total LS contribution 6.31 Total: 6.31 kcal Total: -34.65 -9.27 -43.92 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. ZINC000880038955.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 -87.889 kcal (2) G-P(sol) polarization free energy of solvation -34.651 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -122.540 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.266 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.916 kcal (6) G-S(sol) free energy of system = (1) + (5) -131.806 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.71 seconds