Wall clock time and date at job start Sat Apr 11 2020 06:12:44 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 1.53006 * 1 3 3 C 1.52995 * 109.46933 * 2 1 4 4 H 1.09007 * 109.47281 * 304.25413 * 3 2 1 5 5 C 1.53003 * 109.47110 * 184.25935 * 3 2 1 6 6 N 1.46497 * 109.47420 * 184.99704 * 5 3 2 7 7 C 1.34778 * 120.00102 * 179.97438 * 6 5 3 8 8 O 1.21282 * 119.99946 * 359.97438 * 7 6 5 9 9 C 1.50694 * 119.99996 * 179.97438 * 7 6 5 10 10 H 1.09004 * 109.46141 * 40.00005 * 9 7 6 11 11 C 1.53039 * 109.46479 * 280.02276 * 9 7 6 12 12 C 1.53125 * 109.27936 * 180.80311 * 11 9 7 13 13 C 1.53125 * 109.15678 * 57.65746 * 12 11 9 14 14 C 1.53042 * 109.27458 * 302.34073 * 13 12 11 15 15 N 1.46839 * 109.51483 * 59.19238 * 14 13 12 16 16 C 1.46905 * 110.99498 * 174.14629 * 15 14 13 17 17 N 1.46893 * 109.47594 * 64.25617 * 3 2 1 18 18 C 1.46902 * 111.00044 * 65.54788 * 17 3 2 19 19 C 1.50698 * 109.47314 * 183.46162 * 18 17 3 20 20 O 1.21296 * 119.99776 * 359.97438 * 19 18 17 21 21 N 1.34774 * 120.00156 * 180.02562 * 19 18 17 22 22 C 1.37097 * 120.00148 * 179.97438 * 21 19 18 23 23 H 1.08003 * 120.00063 * 0.02562 * 22 21 19 24 24 C 1.38955 * 120.00184 * 179.97438 * 22 21 19 25 25 N 1.31405 * 120.00035 * 180.02562 * 24 22 21 26 26 Si 1.86795 * 119.99544 * 0.27781 * 24 22 21 27 27 H 1.48507 * 109.47081 * 269.72119 * 26 24 22 28 28 H 1.48493 * 109.47503 * 29.72371 * 26 24 22 29 29 H 1.48506 * 109.46908 * 149.72711 * 26 24 22 30 30 H 1.08999 * 109.46761 * 54.74076 * 1 2 3 31 31 H 1.09001 * 109.46881 * 174.73764 * 1 2 3 32 32 H 1.08999 * 109.46943 * 294.74070 * 1 2 3 33 33 H 1.08994 * 109.46863 * 239.99610 * 2 1 3 34 34 H 1.08998 * 109.46611 * 119.99233 * 2 1 3 35 35 H 1.09003 * 109.46951 * 305.00222 * 5 3 2 36 36 H 1.09004 * 109.47283 * 64.99318 * 5 3 2 37 37 H 0.96995 * 119.99804 * 359.97438 * 6 5 3 38 38 H 1.08998 * 109.49934 * 300.74436 * 11 9 7 39 39 H 1.08994 * 109.50439 * 60.86467 * 11 9 7 40 40 H 1.08994 * 109.52099 * 177.55723 * 12 11 9 41 41 H 1.08992 * 109.52271 * 297.68417 * 12 11 9 42 42 H 1.08989 * 109.50419 * 62.28459 * 13 12 11 43 43 H 1.08998 * 109.49852 * 182.40812 * 13 12 11 44 44 H 1.09007 * 109.45646 * 179.19726 * 14 13 12 45 45 H 1.09000 * 109.46512 * 299.17862 * 14 13 12 46 46 H 1.09004 * 109.47102 * 184.19964 * 16 15 14 47 47 H 1.08994 * 109.46847 * 304.20061 * 16 15 14 48 48 H 1.09004 * 109.46567 * 64.20132 * 16 15 14 49 49 H 1.00904 * 110.99919 * 189.50041 * 17 3 2 50 50 H 1.09004 * 109.47119 * 63.45871 * 18 17 3 51 51 H 1.08995 * 109.47024 * 303.46462 * 18 17 3 52 52 H 0.97003 * 119.99634 * 359.97438 * 21 19 18 53 53 H 0.96995 * 120.00155 * 179.97438 * 25 24 22 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 1.5301 0.0000 0.0000 3 6 2.0400 1.4425 0.0000 4 1 1.6157 1.9779 -0.8495 5 6 3.5663 1.4438 -0.1071 6 7 4.0630 2.8168 0.0127 7 6 5.3866 3.0626 -0.0521 8 8 6.1664 2.1471 -0.2092 9 6 5.8976 4.4750 0.0706 10 1 5.3277 5.0021 0.8358 11 6 5.7365 5.1939 -1.2708 12 6 6.2753 6.6219 -1.1470 13 6 7.7410 6.5695 -0.7069 14 6 7.8438 5.8108 0.6182 15 7 7.3168 4.4510 0.4470 16 6 7.5263 3.6488 1.6597 17 7 1.6361 2.1047 1.2474 18 6 2.2957 1.4900 2.4072 19 6 1.7938 2.1375 3.6721 20 8 0.9682 3.0242 3.6132 21 7 2.2630 1.7321 4.8687 22 6 1.8068 2.3215 6.0194 23 1 1.0710 3.1104 5.9670 24 6 2.2902 1.9031 7.2532 25 7 1.8525 2.4677 8.3561 26 14 3.5673 0.5430 7.3433 27 1 2.8842 -0.7712 7.4507 28 1 4.4039 0.5673 6.1167 29 1 4.4293 0.7516 8.5346 30 1 -0.3633 0.5933 -0.8391 31 1 -0.3633 -1.0234 -0.0943 32 1 -0.3633 0.4301 0.9333 33 1 1.8933 -0.5139 -0.8899 34 1 1.8933 -0.5137 0.8901 35 1 3.9871 0.8340 0.6923 36 1 3.8632 1.0329 -1.0721 37 1 3.4394 3.5489 0.1387 38 1 6.2951 4.6595 -2.0393 39 1 4.6815 5.2253 -1.5425 40 1 6.2024 7.1236 -2.1118 41 1 5.6910 7.1687 -0.4070 42 1 8.3309 6.0569 -1.4665 43 1 8.1179 7.5838 -0.5756 44 1 8.8879 5.7594 0.9271 45 1 7.2646 6.3315 1.3808 46 1 7.1948 2.6259 1.4805 47 1 8.5856 3.6477 1.9161 48 1 6.9537 4.0775 2.4822 49 1 1.8235 3.0954 1.2079 50 1 3.3737 1.6318 2.3295 51 1 2.0702 0.4239 2.4306 52 1 2.9235 1.0233 4.9158 53 1 2.1896 2.1755 9.2173 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 ZINC001714082840.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 06:12:44 Heat of formation + Delta-G solvation = -66.248028 kcal Electronic energy + Delta-G solvation = -31316.231653 eV Core-core repulsion = 27222.689415 eV Total energy + Delta-G solvation = -4093.542238 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.73 seconds Orbital eigenvalues (eV) -40.65374 -39.10538 -38.17519 -37.26196 -34.32040 -33.99039 -33.59112 -32.10998 -31.66225 -31.55171 -28.73224 -27.13107 -26.61804 -24.57677 -24.04016 -23.31350 -22.77285 -20.77358 -20.30742 -19.86722 -19.30091 -18.43806 -17.56547 -16.80662 -16.46883 -15.71482 -15.63431 -15.45150 -15.03897 -14.86585 -14.66238 -14.57559 -14.37807 -14.17273 -13.74349 -13.68816 -13.38333 -13.21752 -13.18530 -13.10347 -12.74044 -12.51439 -12.31571 -12.08608 -12.03075 -11.90087 -11.70667 -11.60019 -11.40116 -11.20350 -11.15495 -11.03580 -10.93745 -10.72503 -10.68963 -10.59888 -10.00310 -9.73940 -9.59540 -9.25503 -8.65910 -8.53383 -8.23797 -8.19189 -6.33823 -3.85233 2.45488 2.82594 3.01187 3.05354 3.13659 3.68221 3.71185 4.03451 4.08721 4.35678 4.44921 4.54961 4.59770 4.69152 4.79781 4.81796 4.93497 4.97720 5.04291 5.18645 5.18955 5.26153 5.27694 5.32313 5.37490 5.41281 5.50212 5.51284 5.58361 5.62027 5.63963 5.66450 5.76103 5.77675 5.78858 5.83993 5.90735 5.95145 6.00281 6.03337 6.19217 6.23435 6.47120 6.69344 6.82579 6.98002 7.27834 7.42263 7.55217 8.06867 8.11532 8.56895 8.92248 9.39846 9.79894 10.79250 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.008366 B = 0.003550 C = 0.002815 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 3346.051442 B = 7885.930971 C = 9944.938450 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.142 4.142 2 C -0.113 4.113 3 C 0.077 3.923 4 H 0.090 0.910 5 C 0.081 3.919 6 N -0.730 5.730 7 C 0.520 3.480 8 O -0.520 6.520 9 C 0.068 3.932 10 H 0.063 0.937 11 C -0.105 4.105 12 C -0.120 4.120 13 C -0.118 4.118 14 C 0.054 3.946 15 N -0.519 5.519 16 C 0.012 3.988 17 N -0.651 5.651 18 C 0.041 3.959 19 C 0.450 3.550 20 O -0.565 6.565 21 N -0.590 5.590 22 C -0.305 4.305 23 H 0.119 0.881 24 C 0.043 3.957 25 N -0.881 5.881 26 Si 0.878 3.122 27 H -0.270 1.270 28 H -0.270 1.270 29 H -0.276 1.276 30 H 0.050 0.950 31 H 0.046 0.954 32 H 0.071 0.929 33 H 0.064 0.936 34 H 0.066 0.934 35 H 0.072 0.928 36 H 0.071 0.929 37 H 0.398 0.602 38 H 0.077 0.923 39 H 0.072 0.928 40 H 0.069 0.931 41 H 0.063 0.937 42 H 0.072 0.928 43 H 0.069 0.931 44 H 0.079 0.921 45 H 0.036 0.964 46 H 0.087 0.913 47 H 0.070 0.930 48 H 0.024 0.976 49 H 0.345 0.655 50 H 0.047 0.953 51 H 0.090 0.910 52 H 0.370 0.630 53 H 0.273 0.727 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 9.277 2.204 -20.840 22.918 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 -0.200 4.200 2 C -0.151 4.151 3 C -0.034 4.034 4 H 0.109 0.891 5 C -0.044 4.044 6 N -0.383 5.383 7 C 0.305 3.695 8 O -0.395 6.395 9 C -0.044 4.044 10 H 0.081 0.919 11 C -0.143 4.143 12 C -0.158 4.158 13 C -0.156 4.156 14 C -0.074 4.074 15 N -0.244 5.244 16 C -0.136 4.136 17 N -0.283 5.283 18 C -0.092 4.092 19 C 0.236 3.764 20 O -0.447 6.447 21 N -0.230 5.230 22 C -0.434 4.434 23 H 0.137 0.863 24 C -0.160 4.160 25 N -0.521 5.521 26 Si 0.704 3.296 27 H -0.195 1.195 28 H -0.196 1.196 29 H -0.201 1.201 30 H 0.069 0.931 31 H 0.065 0.935 32 H 0.090 0.910 33 H 0.083 0.917 34 H 0.084 0.916 35 H 0.090 0.910 36 H 0.089 0.911 37 H 0.233 0.767 38 H 0.096 0.904 39 H 0.090 0.910 40 H 0.088 0.912 41 H 0.082 0.918 42 H 0.091 0.909 43 H 0.087 0.913 44 H 0.097 0.903 45 H 0.054 0.946 46 H 0.106 0.894 47 H 0.088 0.912 48 H 0.043 0.957 49 H 0.165 0.835 50 H 0.065 0.935 51 H 0.109 0.891 52 H 0.202 0.798 53 H 0.084 0.916 Dipole moment (debyes) X Y Z Total from point charges 8.967 1.564 -21.045 22.929 hybrid contribution 1.247 -0.065 1.063 1.640 sum 10.214 1.499 -19.982 22.491 Atomic orbital electron populations 1.21628 0.94522 1.00672 1.03137 1.21506 0.97421 0.94249 1.01969 1.21997 0.90537 0.97326 0.93576 0.89149 1.22191 0.96427 0.83136 1.02689 1.46011 1.07474 1.09867 1.74985 1.20416 0.81971 0.90929 0.76200 1.90678 1.55424 1.46076 1.47299 1.21621 0.90508 0.93104 0.99204 0.91898 1.21535 1.01555 0.95890 0.95357 1.21583 0.96381 0.95968 1.01868 1.21613 0.96818 0.99809 0.97384 1.22164 1.00317 0.87905 0.96989 1.61695 1.14253 1.13025 1.35463 1.22612 1.01898 0.99716 0.89354 1.60186 1.60620 1.07463 1.00051 1.21811 0.96403 1.00201 0.90770 1.19694 0.85955 0.86758 0.83992 1.90563 1.34941 1.32703 1.86452 1.42215 1.39344 1.35182 1.06231 1.19420 1.23472 1.18820 0.81680 0.86291 1.25026 0.97984 0.97963 0.95075 1.69614 1.43168 1.41550 0.97738 0.86701 0.81779 0.82650 0.78450 1.19528 1.19563 1.20140 0.93129 0.93482 0.91004 0.91738 0.91550 0.91009 0.91067 0.76699 0.90397 0.90967 0.91203 0.91790 0.90914 0.91281 0.90254 0.94618 0.89403 0.91163 0.95709 0.83489 0.93533 0.89149 0.79764 0.91596 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 -1.50 9.73 37.16 0.36 -1.14 16 2 C -0.11 -1.11 5.31 -26.73 -0.14 -1.25 16 3 C 0.08 0.77 2.71 -67.72 -0.18 0.59 16 4 H 0.09 0.80 8.14 -51.93 -0.42 0.38 16 5 C 0.08 0.85 4.47 -4.04 -0.02 0.83 16 6 N -0.73 -7.63 5.31 -60.29 -0.32 -7.95 16 7 C 0.52 6.48 6.26 -10.99 -0.07 6.41 16 8 O -0.52 -8.25 14.52 5.56 0.08 -8.17 16 9 C 0.07 0.73 2.24 -68.87 -0.15 0.57 16 10 H 0.06 0.67 8.14 -51.93 -0.42 0.24 16 11 C -0.11 -0.90 5.36 -26.65 -0.14 -1.04 16 12 C -0.12 -0.88 6.00 -26.60 -0.16 -1.04 16 13 C -0.12 -0.90 6.09 -26.64 -0.16 -1.06 16 14 C 0.05 0.50 5.46 -3.84 -0.02 0.48 16 15 N -0.52 -6.01 4.51 -236.32 -1.07 -7.07 16 16 C 0.01 0.15 9.10 60.07 0.55 0.69 16 17 N -0.65 -8.76 5.41 -107.99 -0.58 -9.35 16 18 C 0.04 0.64 5.30 -4.98 -0.03 0.61 16 19 C 0.45 9.91 7.83 -10.99 -0.09 9.82 16 20 O -0.56 -14.62 15.85 5.54 0.09 -14.53 16 21 N -0.59 -13.91 5.09 -10.96 -0.06 -13.97 16 22 C -0.31 -8.57 10.16 -14.93 -0.15 -8.72 16 23 H 0.12 3.81 7.39 -52.48 -0.39 3.43 16 24 C 0.04 1.16 5.50 -17.47 -0.10 1.07 16 25 N -0.88 -25.63 13.96 55.50 0.77 -24.86 16 26 Si 0.88 19.46 27.74 -169.99 -4.71 14.74 16 27 H -0.27 -5.86 7.11 56.52 0.40 -5.46 16 28 H -0.27 -5.52 6.52 56.52 0.37 -5.15 16 29 H -0.28 -6.14 7.11 56.52 0.40 -5.74 16 30 H 0.05 0.49 8.14 -51.93 -0.42 0.07 16 31 H 0.05 0.45 8.14 -51.93 -0.42 0.03 16 32 H 0.07 0.95 7.88 -51.93 -0.41 0.54 16 33 H 0.06 0.53 8.14 -51.93 -0.42 0.11 16 34 H 0.07 0.70 6.28 -51.93 -0.33 0.37 16 35 H 0.07 0.87 6.71 -51.93 -0.35 0.52 16 36 H 0.07 0.73 8.14 -51.93 -0.42 0.31 16 37 H 0.40 3.57 7.23 -40.82 -0.30 3.27 16 38 H 0.08 0.75 8.14 -51.93 -0.42 0.33 16 39 H 0.07 0.51 8.14 -51.93 -0.42 0.09 16 40 H 0.07 0.43 8.14 -51.93 -0.42 0.00 16 41 H 0.06 0.46 8.14 -51.93 -0.42 0.04 16 42 H 0.07 0.59 8.14 -51.94 -0.42 0.17 16 43 H 0.07 0.43 8.14 -51.93 -0.42 0.01 16 44 H 0.08 0.68 8.09 -51.93 -0.42 0.26 16 45 H 0.04 0.34 8.14 -51.93 -0.42 -0.09 16 46 H 0.09 1.27 5.62 -51.93 -0.29 0.98 16 47 H 0.07 0.77 8.09 -51.93 -0.42 0.35 16 48 H 0.02 0.31 8.14 -51.93 -0.42 -0.12 16 49 H 0.35 4.66 7.29 -39.29 -0.29 4.37 16 50 H 0.05 0.70 6.49 -51.93 -0.34 0.36 16 51 H 0.09 1.31 6.22 -51.93 -0.32 0.99 16 52 H 0.37 7.78 5.76 -40.82 -0.24 7.54 16 53 H 0.27 7.36 8.31 -40.82 -0.34 7.02 16 LS Contribution 410.00 15.07 6.18 6.18 Total: -1.00 -33.64 410.00 -9.29 -42.94 By element: Atomic # 1 Polarization: 24.38 SS G_CDS: -9.17 Total: 15.21 kcal Atomic # 6 Polarization: 7.33 SS G_CDS: -0.50 Total: 6.83 kcal Atomic # 7 Polarization: -61.94 SS G_CDS: -1.25 Total: -63.19 kcal Atomic # 8 Polarization: -22.87 SS G_CDS: 0.17 Total: -22.71 kcal Atomic # 14 Polarization: 19.46 SS G_CDS: -4.71 Total: 14.74 kcal Total LS contribution 6.18 Total: 6.18 kcal Total: -33.64 -9.29 -42.94 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. ZINC001714082840.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 -23.313 kcal (2) G-P(sol) polarization free energy of solvation -33.644 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -56.957 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.291 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.935 kcal (6) G-S(sol) free energy of system = (1) + (5) -66.248 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.73 seconds