Wall clock time and date at job start Sat Apr 11 2020 06:13:29 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 1.52999 * 1 3 3 C 1.53004 * 109.47112 * 2 1 4 4 H 1.09000 * 109.46808 * 56.57711 * 3 2 1 5 5 C 1.50706 * 109.47041 * 176.57442 * 3 2 1 6 6 O 1.21276 * 119.99956 * 100.16792 * 5 3 2 7 7 N 1.34782 * 119.99872 * 280.16938 * 5 3 2 8 8 C 1.46493 * 119.99878 * 180.02562 * 7 5 3 9 9 C 1.52997 * 109.47202 * 174.87120 * 8 7 5 10 10 N 1.46892 * 112.84949 * 311.16342 * 9 8 7 11 11 C 1.46906 * 110.99923 * 291.40115 * 10 9 8 12 12 C 1.50696 * 109.46927 * 174.75830 * 11 10 9 13 13 O 1.21297 * 120.00422 * 0.02562 * 12 11 10 14 14 N 1.34780 * 120.00104 * 180.02562 * 12 11 10 15 15 C 1.37098 * 120.00109 * 180.02562 * 14 12 11 16 16 H 1.07995 * 120.00242 * 359.97438 * 15 14 12 17 17 C 1.38953 * 119.99726 * 180.02562 * 15 14 12 18 18 N 1.31407 * 119.99714 * 180.02562 * 17 15 14 19 19 Si 1.86804 * 120.00152 * 359.97438 * 17 15 14 20 20 H 1.48504 * 109.46643 * 90.00208 * 19 17 15 21 21 H 1.48497 * 109.47253 * 210.00235 * 19 17 15 22 22 H 1.48498 * 109.46891 * 330.00538 * 19 17 15 23 23 C 1.53782 * 113.68865 * 82.43263 * 9 8 7 24 24 C 1.53784 * 87.08415 * 89.12805 * 23 9 8 25 25 C 1.53780 * 113.61364 * 179.97438 * 9 8 7 26 26 N 1.46894 * 109.47226 * 296.57725 * 3 2 1 27 27 C 1.46904 * 110.99971 * 184.07296 * 26 3 2 28 28 C 1.46911 * 110.99965 * 308.02323 * 26 3 2 29 29 H 1.09005 * 109.46811 * 65.17742 * 1 2 3 30 30 H 1.09000 * 109.47231 * 185.17636 * 1 2 3 31 31 H 1.09001 * 109.47060 * 305.18080 * 1 2 3 32 32 H 1.09003 * 109.47475 * 240.00328 * 2 1 3 33 33 H 1.08997 * 109.47337 * 119.99829 * 2 1 3 34 34 H 0.96999 * 120.00214 * 359.97438 * 7 5 3 35 35 H 1.08996 * 109.47313 * 54.86839 * 8 7 5 36 36 H 1.09003 * 109.46962 * 294.87344 * 8 7 5 37 37 H 1.00901 * 111.00262 * 167.45072 * 10 9 8 38 38 H 1.08998 * 109.47106 * 294.76139 * 11 10 9 39 39 H 1.09004 * 109.46706 * 54.76045 * 11 10 9 40 40 H 0.96999 * 119.99679 * 359.97438 * 14 12 11 41 41 H 0.97008 * 119.99739 * 179.97438 * 18 17 15 42 42 H 1.09003 * 113.61044 * 203.67373 * 23 9 8 43 43 H 1.08997 * 113.61896 * 334.57621 * 23 9 8 44 44 H 1.08998 * 113.61097 * 270.88487 * 24 23 9 45 45 H 1.08994 * 113.61420 * 139.98026 * 24 23 9 46 46 H 1.08999 * 113.61561 * 25.35036 * 25 9 8 47 47 H 1.08996 * 113.61480 * 156.25288 * 25 9 8 48 48 H 1.08997 * 109.46946 * 66.24797 * 27 26 3 49 49 H 1.09004 * 109.47078 * 186.24739 * 27 26 3 50 50 H 1.08997 * 109.47090 * 306.24479 * 27 26 3 51 51 H 1.09000 * 109.46858 * 66.20604 * 28 26 3 52 52 H 1.09000 * 109.46883 * 186.21005 * 28 26 3 53 53 H 1.08999 * 109.46868 * 306.21056 * 28 26 3 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 1.4425 0.0000 4 1 1.6274 1.9737 0.8577 5 6 3.5447 1.4434 0.0849 6 8 4.2084 1.6085 -0.9166 7 7 4.1526 1.2606 1.2738 8 6 5.6152 1.2619 1.3565 9 6 6.0434 1.1640 2.8220 10 7 5.3427 2.1231 3.6863 11 6 5.7580 3.5006 3.3890 12 6 4.9285 4.4616 4.2010 13 8 4.0757 4.0405 4.9538 14 7 5.1343 5.7890 4.0909 15 6 4.3800 6.6633 4.8301 16 1 3.6207 6.2883 5.5003 17 6 4.5918 8.0318 4.7161 18 7 3.8692 8.8697 5.4250 19 14 5.9048 8.6804 3.5563 20 1 5.3100 8.9121 2.2154 21 1 6.4454 9.9582 4.0855 22 1 7.0024 7.6864 3.4459 23 6 6.0449 -0.2727 3.3706 24 6 7.5001 -0.3733 2.8836 25 6 7.5685 1.1572 3.0191 26 7 1.6190 2.1107 -1.2386 27 6 2.1726 3.4692 -1.3182 28 6 1.9949 1.3192 -2.4178 29 1 -0.3633 0.4315 -0.9328 30 1 -0.3634 -1.0235 0.0927 31 1 -0.3633 0.5921 0.8400 32 1 1.8934 -0.5138 -0.8900 33 1 1.8933 -0.5138 0.8900 34 1 3.6218 1.1289 2.0749 35 1 6.0026 2.1852 0.9257 36 1 6.0111 0.4094 0.8045 37 1 5.4870 1.9044 4.6607 38 1 6.8107 3.6254 3.6423 39 1 5.6131 3.7026 2.3277 40 1 5.8165 6.1257 3.4892 41 1 4.0174 9.8252 5.3457 42 1 5.9425 -0.3262 4.4545 43 1 5.3618 -0.9410 2.8464 44 1 7.5933 -0.7252 1.8562 45 1 8.1561 -0.9026 3.5746 46 1 8.1153 1.6432 2.2111 47 1 7.8826 1.4944 4.0069 48 1 3.2571 3.4146 -1.4124 49 1 1.7577 3.9802 -2.1870 50 1 1.9136 4.0206 -0.4144 51 1 1.4305 0.3867 -2.4243 52 1 1.7715 1.8856 -3.3218 53 1 3.0616 1.0979 -2.3819 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 ZINC001326912853.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 06:13:29 Heat of formation + Delta-G solvation = -35.149711 kcal Electronic energy + Delta-G solvation = -31529.961792 eV Core-core repulsion = 27437.768079 eV Total energy + Delta-G solvation = -4092.193713 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.77 seconds Orbital eigenvalues (eV) -40.74256 -39.87043 -38.22008 -36.84981 -34.54542 -34.18217 -33.34748 -32.91233 -31.66456 -28.90696 -27.49599 -27.29646 -26.45879 -25.84883 -24.13177 -23.28997 -22.47256 -21.50856 -20.04197 -19.39814 -18.87521 -18.36124 -17.26793 -16.89190 -16.38558 -15.71715 -15.58727 -15.41835 -15.16803 -14.89228 -14.67554 -14.58254 -14.42226 -14.08887 -13.63567 -13.39174 -13.21606 -13.17543 -12.85388 -12.60154 -12.48409 -12.39421 -12.31801 -12.10903 -12.01615 -11.84191 -11.76068 -11.56873 -11.46750 -11.24415 -11.09956 -11.09087 -10.88536 -10.84961 -10.61344 -10.47414 -10.26153 -9.99687 -9.59048 -9.03091 -8.65843 -8.22953 -8.19241 -8.13623 -6.33195 -3.84566 2.55625 3.00726 3.05834 3.12129 3.14057 3.71276 3.86711 3.96746 4.08666 4.28556 4.38851 4.41726 4.57552 4.66803 4.76361 4.81936 4.90878 5.13710 5.18022 5.22136 5.27496 5.36561 5.39376 5.46203 5.48154 5.50255 5.55365 5.62007 5.63432 5.66289 5.66811 5.73165 5.77894 5.78269 5.84460 5.88503 5.90675 5.94997 6.02453 6.04835 6.08766 6.22129 6.46752 6.83353 6.93167 6.99378 7.44923 7.54521 7.56062 8.12096 8.20534 8.57388 8.92827 9.40361 9.80226 10.79856 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.008431 B = 0.003649 C = 0.002919 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 3320.396357 B = 7672.138150 C = 9588.786839 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 -0.112 4.112 3 C 0.064 3.936 4 H 0.108 0.892 5 C 0.488 3.512 6 O -0.549 6.549 7 N -0.707 5.707 8 C 0.152 3.848 9 C 0.080 3.920 10 N -0.651 5.651 11 C 0.050 3.950 12 C 0.450 3.550 13 O -0.564 6.564 14 N -0.590 5.590 15 C -0.305 4.305 16 H 0.120 0.880 17 C 0.043 3.957 18 N -0.880 5.880 19 Si 0.878 3.122 20 H -0.270 1.270 21 H -0.276 1.276 22 H -0.270 1.270 23 C -0.128 4.128 24 C -0.140 4.140 25 C -0.167 4.167 26 N -0.513 5.513 27 C 0.009 3.991 28 C 0.000 4.000 29 H 0.065 0.935 30 H 0.051 0.949 31 H 0.058 0.942 32 H 0.069 0.931 33 H 0.070 0.930 34 H 0.412 0.588 35 H 0.067 0.933 36 H 0.069 0.931 37 H 0.355 0.645 38 H 0.046 0.954 39 H 0.084 0.916 40 H 0.370 0.630 41 H 0.273 0.727 42 H 0.088 0.912 43 H 0.073 0.927 44 H 0.081 0.919 45 H 0.070 0.930 46 H 0.070 0.930 47 H 0.086 0.914 48 H 0.048 0.952 49 H 0.067 0.933 50 H 0.067 0.933 51 H 0.063 0.937 52 H 0.060 0.940 53 H 0.065 0.935 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 3.209 -19.527 -11.663 22.970 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 -0.150 4.150 3 C -0.049 4.049 4 H 0.126 0.874 5 C 0.273 3.727 6 O -0.428 6.428 7 N -0.359 5.359 8 C 0.027 3.973 9 C -0.013 4.013 10 N -0.283 5.283 11 C -0.083 4.083 12 C 0.236 3.764 13 O -0.446 6.446 14 N -0.230 5.230 15 C -0.434 4.434 16 H 0.137 0.863 17 C -0.160 4.160 18 N -0.520 5.520 19 Si 0.704 3.296 20 H -0.196 1.196 21 H -0.201 1.201 22 H -0.196 1.196 23 C -0.166 4.166 24 C -0.177 4.177 25 C -0.207 4.207 26 N -0.235 5.235 27 C -0.139 4.139 28 C -0.147 4.147 29 H 0.084 0.916 30 H 0.070 0.930 31 H 0.077 0.923 32 H 0.088 0.912 33 H 0.088 0.912 34 H 0.248 0.752 35 H 0.086 0.914 36 H 0.087 0.913 37 H 0.175 0.825 38 H 0.064 0.936 39 H 0.102 0.898 40 H 0.202 0.798 41 H 0.084 0.916 42 H 0.106 0.894 43 H 0.091 0.909 44 H 0.099 0.901 45 H 0.088 0.912 46 H 0.089 0.911 47 H 0.105 0.895 48 H 0.067 0.933 49 H 0.086 0.914 50 H 0.085 0.915 51 H 0.082 0.918 52 H 0.079 0.921 53 H 0.084 0.916 Dipole moment (debyes) X Y Z Total from point charges 1.942 -19.368 -12.181 22.962 hybrid contribution 2.707 0.866 -0.046 2.843 sum 4.649 -18.502 -12.227 22.659 Atomic orbital electron populations 1.21660 0.94097 1.01120 1.03086 1.21558 0.97659 0.93202 1.02624 1.22023 0.89136 0.97741 0.95962 0.87388 1.22038 0.91754 0.75739 0.83174 1.90586 1.67002 1.50117 1.35134 1.45991 1.07228 1.72191 1.10512 1.20976 0.81119 1.01922 0.93297 1.22565 0.91839 0.93443 0.93409 1.59808 1.59156 1.00261 1.09059 1.21651 0.96995 0.89000 1.00640 1.19682 0.87325 0.82646 0.86737 1.90562 1.35833 1.77216 1.40958 1.42215 1.34748 1.05653 1.40355 1.19417 1.16310 0.86544 1.21093 0.86273 1.25027 0.97721 0.95724 0.97568 1.69619 1.39458 1.03058 1.39902 0.86699 0.81736 0.79516 0.81600 1.19564 1.20144 1.19598 1.23093 0.96866 0.95037 1.01559 1.22767 0.97046 0.96271 1.01655 1.23633 0.97350 0.97065 1.02681 1.62502 1.56975 1.02870 1.01163 1.22570 0.99524 0.89232 1.02601 1.22722 1.01922 0.97877 0.92205 0.91612 0.93040 0.92335 0.91239 0.91182 0.75156 0.91435 0.91270 0.82474 0.93590 0.89814 0.79784 0.91597 0.89374 0.90871 0.90051 0.91168 0.91142 0.89546 0.93337 0.91394 0.91463 0.91829 0.92116 0.91635 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 -1.20 9.66 37.16 0.36 -0.85 16 2 C -0.11 -1.02 4.92 -26.73 -0.13 -1.15 16 3 C 0.06 0.72 2.31 -68.86 -0.16 0.56 16 4 H 0.11 1.26 8.14 -51.93 -0.42 0.84 16 5 C 0.49 6.26 6.25 -10.98 -0.07 6.19 16 6 O -0.55 -8.45 11.97 5.56 0.07 -8.39 16 7 N -0.71 -8.22 5.38 -60.30 -0.32 -8.55 16 8 C 0.15 1.69 4.62 -4.05 -0.02 1.68 16 9 C 0.08 0.82 0.78 -130.79 -0.10 0.72 16 10 N -0.65 -8.72 5.37 -100.40 -0.54 -9.26 16 11 C 0.05 0.78 5.78 -4.97 -0.03 0.75 16 12 C 0.45 9.87 7.83 -10.99 -0.09 9.78 16 13 O -0.56 -14.49 15.89 5.54 0.09 -14.40 16 14 N -0.59 -13.88 5.09 -10.96 -0.06 -13.94 16 15 C -0.30 -8.54 10.16 -14.93 -0.15 -8.70 16 16 H 0.12 3.81 7.39 -52.49 -0.39 3.43 16 17 C 0.04 1.17 5.50 -17.47 -0.10 1.07 16 18 N -0.88 -25.62 13.96 55.50 0.77 -24.84 16 19 Si 0.88 19.43 27.74 -169.99 -4.71 14.72 16 20 H -0.27 -5.91 7.11 56.52 0.40 -5.50 16 21 H -0.28 -6.12 7.11 56.52 0.40 -5.72 16 22 H -0.27 -5.47 6.52 56.52 0.37 -5.10 16 23 C -0.13 -1.08 7.34 -25.92 -0.19 -1.27 16 24 C -0.14 -1.07 7.74 -25.90 -0.20 -1.27 16 25 C -0.17 -1.53 6.49 -25.91 -0.17 -1.69 16 26 N -0.51 -6.14 4.56 -244.57 -1.11 -7.26 16 27 C 0.01 0.11 9.04 60.07 0.54 0.66 16 28 C 0.00 0.01 8.57 60.07 0.51 0.52 16 29 H 0.06 0.60 7.62 -51.93 -0.40 0.20 16 30 H 0.05 0.37 8.14 -51.93 -0.42 -0.05 16 31 H 0.06 0.51 8.14 -51.93 -0.42 0.09 16 32 H 0.07 0.64 6.25 -51.93 -0.32 0.32 16 33 H 0.07 0.57 8.14 -51.93 -0.42 0.15 16 34 H 0.41 4.68 8.13 -40.82 -0.33 4.35 16 35 H 0.07 0.86 7.32 -51.93 -0.38 0.48 16 36 H 0.07 0.73 7.35 -51.93 -0.38 0.35 16 37 H 0.35 4.90 8.37 -39.29 -0.33 4.57 16 38 H 0.05 0.65 7.58 -51.93 -0.39 0.26 16 39 H 0.08 1.28 6.89 -51.93 -0.36 0.93 16 40 H 0.37 7.75 5.76 -40.82 -0.24 7.52 16 41 H 0.27 7.36 8.31 -40.82 -0.34 7.02 16 42 H 0.09 0.74 7.96 -51.93 -0.41 0.33 16 43 H 0.07 0.59 8.10 -51.93 -0.42 0.17 16 44 H 0.08 0.59 7.66 -51.93 -0.40 0.20 16 45 H 0.07 0.49 8.14 -51.93 -0.42 0.07 16 46 H 0.07 0.64 8.10 -51.93 -0.42 0.22 16 47 H 0.09 0.82 8.14 -51.93 -0.42 0.39 16 48 H 0.05 0.71 5.96 -51.93 -0.31 0.40 16 49 H 0.07 0.79 8.14 -51.93 -0.42 0.36 16 50 H 0.07 0.89 8.12 -51.93 -0.42 0.47 16 51 H 0.06 0.62 6.24 -51.93 -0.32 0.29 16 52 H 0.06 0.63 8.08 -51.93 -0.42 0.21 16 53 H 0.07 0.86 5.35 -51.93 -0.28 0.58 16 LS Contribution 411.19 15.07 6.20 6.20 Total: -1.00 -32.25 411.19 -8.66 -40.91 By element: Atomic # 1 Polarization: 26.86 SS G_CDS: -9.05 Total: 17.81 kcal Atomic # 6 Polarization: 6.97 SS G_CDS: 0.02 Total: 6.99 kcal Atomic # 7 Polarization: -62.58 SS G_CDS: -1.26 Total: -63.84 kcal Atomic # 8 Polarization: -22.94 SS G_CDS: 0.15 Total: -22.78 kcal Atomic # 14 Polarization: 19.43 SS G_CDS: -4.71 Total: 14.72 kcal Total LS contribution 6.20 Total: 6.20 kcal Total: -32.25 -8.66 -40.91 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. ZINC001326912853.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 5.756 kcal (2) G-P(sol) polarization free energy of solvation -32.249 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -26.493 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.656 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.905 kcal (6) G-S(sol) free energy of system = (1) + (5) -35.150 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.77 seconds